Analog Devices Welcomes
Hittite Microwave Corporation
NO CONTENT ON THE ATTACHED DOCUMENT HAS CHANGED
www.analog.com www.hittite.com
THIS PAGE INTENTIONALLY LEFT BLANK
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 1
HMC1020LP4E
General Descriptions
Features
Functional Diagram
The HMC1020LP4E Power Detector is designed for
RF power measurement and control applications for
frequencies up to 3.9 GHz. The detector provides
an accurate RMS representation of any broadband,
single-ended RF/IF input signal. The output is a tem-
perature compensated, monotonic representation of
real signal power, measured with an input sensing
range of 72 dB.
The HMC1020LP4E is ideally suited to those wide
bandwidth, wide dynamic range applications requir-
ing repeatable measurement of real signal power,
especially where RF/IF wave shape and/or crest factor
change with time.
The integration bandwidth of the HMC1020LP4E is
digitally programmable with the use of input pins
SCI1-4 over a range of more than 3 decades. This
allows the user to dynamically set the operation
bandwidth and also permits the detection of different
types of modulations on the same platform.
HMC1020LP4E features an internal op-amp at the out-
put stage, which provides for slope / intercept adjust-
ments and enables controller application.
Broadband Single-Ended RF Input
±1 dB Detection Accuracy to 3.9 GHz
Input Dynamic Range: -65 dBm to +7 dBm
RF Signal Wave Shape & Crest Factor Independent
Digitally Programmable Integration Bandwidth
Excellent Temperature Stability
Power-Down Mode
24 Lead 4x4mm SMT Package: 16mm
Typical Applications
The HMC1020LP4E is ideal for:
• Log –> Root-Mean-Square (RMS) Conversion
• Tx/Rx Signal Strength Indication (TSSI/RSSI)
• RF Power Amplier Efficiency Control
• Receiver Automatic Gain Control
• Transmitter Power Control
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
v02.0511
Electrical Specications I
TA = +25 °C, Vcc = 5V, Sci4 = Sci1 = 0V, Sci3 = Sci2 = 5V, Unless Otherwise Noted
Parameter Typ. Typ. Typ. Ty p. Typ. Typ. Ty p. Units
Dynamic Range (±1dB Error) [1]
Input Frequency 100 900 1900 2200 2700 3500 3900 MHz
Single Ended Input Conguration 72 72 71 70 66 58 53 dB
Deviation vs Temperature: (Over full temperature range -40 °C to 85 °C).
Deviation is measured from reference, which is the same WCDMA input at 25 °C. 1dB
[1] With WCDMA 4 Carrier (TMI1-64 DPCH)
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 2
Electrical Specications II
TA = +25 °C, Vcc = 5V, Sci4 = Sci1 = 0V, Sci3 = Sci2 = 5V, Unless Otherwise Noted
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
RMSOUT vs. Pin with Different
Modulations @ 1900 MHz [1]
RMSOUT Error vs. Pin with Different
Modulations @ 1900 MHz [1]
[1] Data was taken at Sci4=Sci1=0V, Sci3=Sci2=5V, shortest integration time is for SCI=0000, allowed longest integration time is for SCI=1100
Parameter Typ. Typ. Typ. Ty p. Typ. Typ. Ty p. Units
Input Frequency 100 900 1900 2200 2700 3500 3900 MHz
Modulation Deviation (Output deviation from reference, which is measured with CW input at equivalent input signal power)
WCDMA 4 Carrier (TM1-64 DPCH) at +25 °C 0.1 0.1 0.1 0.1 0.1 0.1 0.1 dB
WCDMA 4 Carrier (TM1-64 DPCH) at +85 °C 0.1 0.1 0.1 0.1 0.1 0.1 0.1 dB
WCDMA 4 Carrier (TM1-64 DPCH) at -40 °C 0.1 0.1 0.1 0.1 0.1 0.1 0.1 dB
Logarithmic Slope and Intercept [1]
Logarithmic Slope 35.0 35.2 36.0 36.6 37.9 41.5 44.4 mV/dB
Logarithmic Intercept -68.2 - 6 7.9 -66.5 -65.6 -63.6 -58.7 -55.3 dBm
Max. Input Power at ±1dB Error 7 7 7 7 5 2 0 dBm
Min. Input Power at ±1dB Error -65 -65 -64 -63 -61 -56 -53 dBm
[1] With WCDMA 4 Carrier (TM1-64 DPCH)
0
0.5
1
1.5
2
2.5
3
-70 -60 -50 -40 -30 -20 -10 0 10
Ideal
CW
WCDMA 4 carriers
WCDMA1
CDMA2000
LTEDW
RMSOUT (V)
INPUT POWER (dBm)
-4
-3
-2
-1
0
1
2
3
4
-70 -60 -50 -40 -30 -20 -10 0 10
CW
WCDMA 4 carriers
WCDMA1
CDMA2000
LTEDW
ERROR (dB)
INPUT POWER (dBm)
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 3
Electrical Specications III
TA = +25 °C, Vcc = 5V, Sci4 = Sci1 = 0V, Sci3 = Sci2 = 5V, Unless Otherwise Noted
Parameter Conditions Min Typ. Max Units
Single-Ended Input Conguration
Input Network Return Loss up to 3.9 GHz > 15 dB
Input Resistance between INP and INN Between pins 3 and 4 100 Ω
Input Voltage Range AC coupled peak voltage at INP 0.85 V
RMSOUT Output
Output Voltage Range 0.13 to 2.7 V
Source/Sink Current Compliance RMSOUT held at VCC/2 8 / -0.55 mA
Output Slew Rate (rise / fall) Sci4=Sci3=Sci2=Sci1=0V, Cofs=1nF 24 / 1.9 106 V/s
VSET Input (Negative Feedback Terminal)
Input Voltage Range For control applications with nominal
slope/intercept settings 0.13 to 2.7 V
Input Resistance 5MΩ
SCI1-4 Inputs, ENX Logic Input (Power Down Control)
Input High Voltage 0.7xVCC V
Input Low Voltage 0.3xVCC V
Input High Current 1A
Input Low Current 1A
Input Capacitance 0.5 pf
Power Supply
Supply Voltage 4.5 55.5 V
Supply Current with no input power 55 mA
Supply Current with Pin = -20dBm 58 mA
Standby Mode Supply Current 5 mA
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 4
RMSOUT & Error vs. Pin @ 100 MHz [1][2]
RMSOUT & Error vs. Pin @ 1900 MHz [1][2]
RMSOUT & Error vs. Pin @ 900 MHz [1][2]
RMSOUT & Error vs. Pin @ 2200 MHz [1][2]
RMSOUT & Error vs. Pin @ 2700 MHz [1][2] RMSOUT & Error vs. Pin @ 3500 MHz [1][2]
[1] Data was taken at Sci4=Sci1=0V, Sci3=Sci2=5V, shortest integration time is for SCI=0000, allowed longest integration time is for SCI=1100
[2] WCDMA 4 carriers input waveform
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
-4
-3
-2
-1
0
1
2
3
4
-70 -60 -50 -40 -30 -20 -10 0 10
ERR +25C
ERR +85C
ERR -40C
Ideal
LOGOUT +25C
LOGOUT +85C
LOGOUT -40C
RMSOUT (V)
ERROR (dB)
INPUT POWER (dBm)
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
-4
-3
-2
-1
0
1
2
3
4
-70 -60 -50 -40 -30 -20 -10 0 10
ERR +25C
ERR +85C
ERR -40C
Ideal
LOGOUT +25C
LOGOUT +85C
LOGOUT -40C
RMSOUT (V)
ERROR (dB)
INPUT POWER (dBm)
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
-4
-3
-2
-1
0
1
2
3
4
-70 -60 -50 -40 -30 -20 -10 0 10
ERR +25C
ERR +85C
ERR -40C
Ideal
LOGOUT +25C
LOGOUT +85C
LOGOUT -40C
RMSOUT (V)
ERROR (dB)
INPUT POWER (dBm)
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
-4
-3
-2
-1
0
1
2
3
4
-70 -60 -50 -40 -30 -20 -10 0 10
ERR +25C
ERR +85C
ERR -40C
Ideal
LOGOUT +25C
LOGOUT +85C
LOGOUT -40C
RMSOUT (V)
ERROR (dB)
INPUT POWER (dBm)
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
-4
-3
-2
-1
0
1
2
3
4
-70 -60 -50 -40 -30 -20 -10 0 10
ERR +25C
ERR +85C
ERR -40C
Ideal
LOGOUT +25C
LOGOUT +85C
LOGOUT -40C
RMSOUT (V)
ERROR (dB)
INPUT POWER (dBm)
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
-4
-3
-2
-1
0
1
2
3
4
-70 -60 -50 -40 -30 -20 -10 0 10
ERR +25C
ERR +85C
ERR -40C
Ideal
LOGOUT +25C
LOGOUT +85C
LOGOUT -40C
RMSOUT (V)
ERROR (dB)
INPUT POWER (dBm)
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 5
Intercept vs. Frequency [1][2]
RMSOUT & Error vs. Pin @ 3900 MHz [1][2]
Slope vs. Frequency [1][2]
RMSOUT vs. Pin with WCDMA
4 Carrier @ +25 °C [1]
RMSOUT Error vs. Pin with WCDMA 4
Carrier @ +25 °C [1]
RMSOUT Error vs. Pin with WCDMA 4
Carrier @ +85 °C wrt +25 °C Response [1]
[1] Data was taken at Sci4=Sci1=0V, Sci3=Sci2=5V, shortest integration time is for SCI=0000, allowed longest integration time is for SCI=1100
[2] WCDMA 4 carriers input waveform
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
-4
-3
-2
-1
0
1
2
3
4
-70 -60 -50 -40 -30 -20 -10 0 10
ERR +25C
ERR +85C
ERR -40C
Ideal
LOGOUT +25C
LOGOUT +85C
LOGOUT -40C
RMSOUT (V)
ERROR (dB)
INPUT POWER (dBm)
-80
-75
-70
-65
-60
-55
-50
0 1000 2000 3000 4000
+25C
+85C
-40C
FREQUENCY (MHz)
INTERCEPT (dBm)
30
35
40
45
50
0 1000 2000 3000 4000
+25C
+85C
-40C
FREQUENCY (MHz)
SLOPE (mV/dB)
0
0.5
1
1.5
2
2.5
3
-70 -60 -50 -40 -30 -20 -10 0 10
100MHz
900MHz
1900MHz
2200MHz
2700MHz
3500MHz
3900MHz
INPUT POWER (dBm)
RMSOUT (V)
-4
-3
-2
-1
0
1
2
3
4
-70 -60 -50 -40 -30 -20 -10 0 10
100MHz
900MHz
1900MHz
2200MHz
2700MHz
3500MHz
3900MHz
INPUT POWER (dBm)
ERROR (dB)
-4
-3
-2
-1
0
1
2
3
4
-70 -60 -50 -40 -30 -20 -10 0 10
100MHz
900MHz
1900MHz
2200MHz
2700MHz
3500MHz
3900MHz
INPUT POWER (dBm)
ERROR (dB)
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 6
RMSOUT Error vs. Pin with WCDMA 4
Carrier @ -40 °C wrt +25 °C Response [1] RMSOUT vs. Pin with CW @ +25 °C [1]
RMSOUT Error vs. Pin with CW @ +25 °C [1]
RMSOUT vs. Pin w/ CW & WCDMA 4 Carrier
@ 1900 MHz & +25 °C [1]
Reading Error for WCDMA 4 Carrier wrt
CW Response @ +25 °C [1]
RMSOUT vs. Pin w/ CW & WCDMA 4 Carrier
@ 1900 MHz & +85 °C [1]
[1] Data was taken at Sci4=Sci1=0V, Sci3=Sci2=5V, shortest integration time is for SCI=0000, allowed longest integration time is for SCI=1100
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
-4
-3
-2
-1
0
1
2
3
4
-70 -60 -50 -40 -30 -20 -10 0 10
100MHz
900MHz
1900MHz
2200MHz
2700MHz
3500MHz
3900MHz
INPUT POWER (dBm)
ERROR (dB)
0
0.5
1
1.5
2
2.5
3
-70 -60 -50 -40 -30 -20 -10 0 10
100MHz
900MHz
1900MHz
2200MHz
2700MHz
3500MHz
3900MHz
INPUT POWER (dBm)
RMSOUT (V)
-4
-3
-2
-1
0
1
2
3
4
-70 -60 -50 -40 -30 -20 -10 0 10
100MHz
900MHz
1900MHz
2700MHz
2200MHz
3500MHz
3900MHz
INPUT POWER (dBm)
ERROR (dB)
0
0.5
1
1.5
2
2.5
3
-70 -60 -50 -40 -30 -20 -10 0 10
CW
WCDMA
INPUT POWER (dBm)
RMSOUT (V)
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
-70 -60 -50 -40 -30 -20 -10 0 10
100MHz
900MHz
1900MHz
2200MHz
2700MHz
3500MHz
3900MHz
INPUT POWER (dBm)
ERROR (dB)
0
0.5
1
1.5
2
2.5
3
-70 -60 -50 -40 -30 -20 -10 0 10
CW
WCDMA
INPUT POWER (dBm)
RMSOUT (V)
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 7
Reading Error for WCDMA 4 Carrier wrt
CW Response @ -40 °C [1]
Reading Error for WCDMA 4 Carrier wrt
CW Response @ +85 °C [1]
Output Response
with SCI = 0000 @ 1900 MHz
RMSOUT vs. Pin w/ CW & WCDMA 4
Carrier @ 1900 MHz & -40 °C [1]
Output Response
with SCI = 1100 @ 1900 MHz Typical Supply Current vs. Pin, Vcc = 5V
[1] Data was taken at Sci4=Sci1=0V, Sci3=Sci2=5V, shortest integration time is for SCI=0000, allowed longest integration time is for SCI=1100
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
-70 -60 -50 -40 -30 -20 -10 0 10
100MHz
900MHz
1900MHz
2200MHz
2700MHz
3500MHz
3900MHz
INPUT POWER (dBm)
ERROR (dB)
0
0.5
1
1.5
2
2.5
3
-70 -60 -50 -40 -30 -20 -10 0 10
CW
WCDMA
INPUT POWER (dBm)
RMSOUT (V)
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
-70 -60 -50 -40 -30 -20 -10 0 10
100MHz
900MHz
1900MHz
2200MHz
2700MHz
3500MHz
3900MHz
INPUT POWER (dBm)
ERROR (dB)
0
0.5
1
1.5
2
2.5
3
-5
0
5
10
15
20
25
-20246810
-20 dBm
0 dBm
RMSOUT (V)
RF ENABLE VOLTAGE (V)
TIME (us)
MSOUT
RF ENABLE
RF
ON
RF
OFF
RF
OFF
0
0.5
1
1.5
2
2.5
3
-5
0
5
10
15
20
25
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
-20 dBm
0 dBm
RMSOUT (V)
RF ENABLE VOLTAGE (V)
TIME (ms)
RMSOUT
RF ENABLE
RF
ON
RF
OFF
RF
OFF
40
45
50
55
60
65
70
-70 -60 -50 -40 -30 -20 -10 0 10
+25C
+85C
-40C
INPUT POWER (dBm)
SUPPLY CURRENT (mA)
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 8
Input Return Loss vs. Frequency
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
-30
-25
-20
-15
-10
-5
0
0123456
FREQUENCY (GHz)
RETURN LOSS (dB)
0
300
600
900
1200
1500
1800
0.1
1
10
100
1000
10000
100000
0123456789101112
Rise Time
Fall Time
Ripple with WCDMA1
Ripple with WCDMA4
Ripple with 8 Tone (1kHz seperation)
Ripple with 8 Tone (10kHz seperation)
Output Ripple Peak-Peak (mV)
Rise Time & Fall Time (us)
Integration Setting (in Decimal)
Output Ripple & Rise/Fall Time
vs. Integration Setting
[Sci4,Sci3,Sci2,Sci1] in Decimal
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 9
Outline Drawing
NOTES:
1. LEADFRAME MATERIAL: COPPER ALLOY
2. DIMENSIONS ARE IN INCHES [MILLIMETERS].
3. LEAD SPACING TOLERANCE IS NON-CUMULATIVE
4. PAD BURR LENGTH SHALL BE 0.15mm MAXIMUM.
PAD BURR HEIGHT SHALL BE 0.05mm MAXIMUM.
5. PACKAGE WARP SHALL NOT EXCEED 0.05mm.
6. ALL GROUND LEADS AND GROUND PADDLE MUST
BE SOLDERED TO PCB RF GROUND.
7. REFER TO HMC APPLICATION NOTE FOR SUGGESTED PCB LAND PATTERN.
Package Information
Absolute Maximum Ratings
Power Supply Voltage (Vcc) 5.6V
Single Ended RF Input Power 10 dBm
Single Ended Input Voltage VCC + 0.6V
Junction Temperature 125 °C
Continuous Pdiss (T = 85°C)
(Derate 32.45 mW/°C above 85°C) 1.39 W
Thermal Resistance (Rth)
(junction to ground paddle) 28.68 °C/W
Storage Temperature -65 to +150 °C
Operating Temperature -40 to +85 °C
ESD Sensitivity (HBM) Class 1B
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Part Number Package Body Material Lead Finish MSL Rating Package Marking [1]
HMC1020LP4E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] H1020
XXXX
[1] 4-Digit lot number XXXX
[2] Max peak reow temperature of 260 °C
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 10
Pin Descriptions
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
Pin Number Function Description Interface Schematic
1, 16, 21, 23 Vcc Bias Supply. Connect supply voltage to these pins
with appropriate ltering.
2, 5, 6, 8,
11 - 13, 22, 24
Package Base
GND Package bottom has an exposed metal paddle that
must be connected to RF/DC ground.
3 ,4 INP, INN RF input pins.
7ENX
Disable pin. Connect to GND for normal operation.
Applying voltage V>0.8xVcc will initiate power saving
mode.
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 11
Pin Descriptions (Continued)
Pin Number Function Description Interface Schematic
9, 10 COFSA,
COFSB
Input high pass lter capacitor. Connect a capacitor
between COFSA and COFSB to determine 3 dB
point of input signal high-pass lter.
14 VSET Set input point for controller mode.
15 RMSOUT Logarithmic output that provides an indication of
mean square input power.
17, 18, 19, 20 SCI1, SCI2,
SCI3, SCI4
Digital input pins that control the internal integration
time constant for mean square calculation. SCI4 is
the most signicant bit. Set V>0.2xVcc to disable.
Shortest integration time is for SCI=0000, allowed
longest integration time is for SCI=1100 (1101, 1110
and 1111 SCI settings are forbidden states). Each
step changes the integration time by 1 octave.
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 12
Evaluation PCB
The circuit board used in the application should
use RF circuit design techniques. Signal lines sho-uld
have 50 ohm impedance while the package ground
leads and exposed paddle should be connected
directly to the ground plane similar to that shown. A
sufficient number of via holes should be used to con-
nect the top and bottom ground planes. The evalua-
tion circuit board shown is available from Hittite upon
request.
Board is congured with wideband single-ended input
interface suitable for input signal frequencies above
100 MHz. Refer to wideband single-ended input inter-
face section in application information for operating
with signals below 100 MHz.
List of Materials for Evaluation PCB
Item Description
J1, J2 SMA Connector
TP1 - TP9 DC Pin
C1, C10, C16 100 pF Capacitor, 0402 Pkg.
C2, C5, C11, C17 100 nF Capacitor, 0402 Pkg.
C3, C4, C6 1000 pF Capacitor, 0402 Pkg.
R2, R12 - R15 10K Ohm Resistor, 0402 Pkg.
R3 - R5, R9, R10 0 Ohm Resistor, 0402 Pkg.
R6, R7 4.7K Ohm Resistor, 0402 Pkg.
U1 HMC1020LP4E
RMS Power Detector
PCB [1] 128683-1 Evaluation PCB
[1] Circuit Board Material: Rogers 4350 or Arlon 25FR
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
Evaluation Order Information
Item Content Part Number
Evaluation PCB HMC1020LP4E Evaluation PCB EVAL01-HMC1020LP4E
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 13
Application Circuit
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 14
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
The HMC1020LP4E power detector is the optimal solution for monitoring and controlling transmitted and received
signal power, measuring the incident RF signal power, and then generating an output signal representing the input
power level.
The HMC1020LP4E is a monolithic true-RMS detector, which in fact is an analog calculator, designed to measure
the actual RMS power of the input signal, independent of the modulated signal waveform complexity or modulation
scheme. At the core of an RMS detector is a full-wave rectier, log/antilog circuit, and an integrator. The RMS output
signal is directly proportional to the logarithm of the time-average of VIN
2. The bias block also contains temperature
compensation circuits which stabilize output accuracy over the entire operating temperature range. The DC offset
cancellation circuit actively cancels internal offsets so that even very small input signal levels can be measured
accurately.
The HMC1020LP4E achieves exceptional RF power measurement accuracy independent of the modulation of the
carrier, with the system architecture shown in the block diagram gure. The relation between the HMC1020LP4E’s
RMSOUT output and the RF input power is given below:
Conguration For The Typical Application
The HMC1020LP4E is a logarithmic RMS detector that can be directly driven with a single-ended 50-Ohm RF source.
The integrated broadband single-ended input interface of HMC1020LP4E eliminates the requirement for an external
balun transformer or a matching network. The HMC1020LP4E can be operated from DC to 3.9 GHz by using only
standard DC blocking capacitors. This simple input interface provides cost and PCB area reductions and increases
measurement repeatability.
The RMS output signal is typically connected to VSET through a resistive network providing a Pin -> RMSOUT
transfer characteristic slope of 35.2 mV/dB ( at 900 MHz). However the RMS output can be re-scaled to “magnify”
a specic portion of the input sensing range, and to fully utilize the dynamic range of the RMS output. Refer to the
section under the “log-slope and intercept” heading for details.
Application Information
Principle of Operation
PIN = RMSOUT / [log-slope] + [log-intercept], dBm
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 15
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
Due to part-to-part variations in log-slope and log-intercept, a system-level calibration is recommended to satisfy
absolute accuracy requirements; refer to the “System Calibration” section for more details.
Broadband Single-Ended Input Interface
The HMC1020LP4E operates with a single-ended input
interface and requires only two external DC blocking capacitors
and an external 50 Ohm resistor. The HMC1020LP4E input
interface shown below provides a compact, broadband
solution.
Note that the provided single-ended input interface covers the whole operating spectrum of the HMC1020LP4E
and does not require matching/tuning for different frequencies. The performance of the HMC1020LP4E at different
frequencies is shown below:
RMSOUT & Error vs. Pin
0
0.4
0.8
1.2
1.6
2
2.4
2.8
3.2
-4
-3
-2
-1
0
1
2
3
4
-70 -60 -50 -40 -30 -20 -10 0 10
ERR 100MHz
ERR 900MHz
ERR 1900MHz
ERR 2200MHz
ERR 2700MHz
ERR 3500MHz
ERR 3900MHz
LOGOUT 100MHz
LOGOUT 900MHz
LOGOUT 1900MHz
LOGOUT 2200MHz
LOGOUT 2700MHz
LOGOUT 3500MHz
LOGOUT 3900MHz
RMSOUT (V)
ERROR (dB)
INPUT POWER (dBm)
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 16
RMS Output Interface and Transient Response
The HMC1020LP4E features digital input pins (SCI1-SCI4) that control the internal integration time constant. Output
transient response is determined by the digital integration controls, and output load conditions.
Shortest integration time is for SCI=0000, allowed longest integration time is for SCI=1100 (1101, 1110 and 1111 SCI
settings are forbidden states).
Using larger values of SCI will narrow the operating bandwidth of the integrator, resulting in a longer averaging
time interval and a more ltered output signal. It will also slow the power detector’s transient response. A larger
SCI value favors output accuracy over speed. For the fastest possible transient settling times set SCI to 0000. This
conguration will operate the integrator at its widest possible bandwidth, resulting in short averaging time-interval
and an output signal with little ltering. For most applications an SCI setting may be selected to maintain a balance
between speed and accuracy. Furthermore, error performance over modulation bandwidth is dependent on the SCI
setting. For example, modulations with relatively low frequency components and high crest factors may require higher
SCI (integration) settings.
Table 1: Transient Response vs. SCI Setting [1]:
RMSOUT Rise-Time 10% -> 90% (µs) [3] RMSOUT Rise Settling Time (µs) [2] RMSOUT Fall-time 100% -> 10% (µs) [4]
SCI4,3, 2,1 Pin = 0
dBm
Pin = -20
dBm
Pin = -40
dBm
Pin = 0
dBm
Pin = -20
dBm
Pin = -40
dBm
Pin = 0
dBm
Pin = -20
dBm
Pin = -40
dBm
0000 0.0686 0.044 0.053 0.509 0.504 0.257 0.969 0.975 1
0010 0.0684 0.05 0.093 0.54 0.524 0.6788 2.98 3.193 3.35
0100 0.076 0.066 0.878 1.956 1.872 2.82 13.5 14.18 14.978
0110 1.624 3.432 4.84 7.8 8.056 8.92 62.9 65.384 69.224
1000 8.6 15.32 23.4 35.52 3 7. 28 40.92 294.64 304.52 317. 32
1010 38.6 65.8 109.6 165.2 156 188 1379.4 1423.6 147 7. 6
110 0 186 325 509 802 770 831 6447 6640 6881
[1] Input signal is 1900 MHz CW -tone switched on and off
[2] Measured from RF switching edge to 1dB (input referred) settling of RMSOUT.
[3] Measured from 10% to 90%
[4] Measured from 100% to 10%
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 17
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
0.01
0.1
1
10
100
1000
10000
0123456789101112
-40 dBm
-20 dBm
0 dBm
INTEGRATION SETTING (IN DECIMAL)
RISE TIME (us)
Rise Time[1] vs.
SCI Setting over Input Power
[1] Measured from 10% to 90%
[2] Measured from RF switching edge to 1dB (input referred) settling of RMSOUT.
[3] Measured from 100% to 10%
Rise Settling Time[2] vs.
SCI Setting over Input Power
0.1
1
10
100
1000
10000
100000
0123456789101112
-40 dBm
-20 dBm
0 dBm
INTEGRATION SETTING (IN DECIMAL)
RISE TIME (us)
1
10
100
1000
10000
100000
0123456789101112
-40 dBm
-20 dBm
0 dBm
INTEGRATION SETTING (IN DECIMAL)
FALL TIME (us)
Fall Time[1] vs.
SCI Setting over Input Power
For increased load drive capability, consider a buffer
amplier on the RMS output. Using an integrating
amplier on the RMS output allows for an alternative
treatment for faster settling times. An external
amplier optimized for transient settling can also
provide additional RMS ltering, when operating
HMC1020LP4E with a lower SCI value.
Following gures show how the peak-to-peak ripple
decreases with higher SCI settings along with the RF
pulse response over different modulations.
Residual Ripple for 900 Mhz
WiMAX @ SCI=0100
Residual Ripple for 900 Mhz
WiMAX @ SCI=0110
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
-100
-80
-60
-40
-20
0
20
40
60
80
100
0 50 100 150 200 250 300 350 400 450 500
SCI = 0000
SCI = 0100
RMSOUT (V)
RF INPUT VOLTAGE (mV)
TIME (us)
RF
INPUT
RMSOUT
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
-100
-80
-60
-40
-20
0
20
40
60
80
100
0 50 100 150 200 250 300 350 400 450 500
SCI = 0000
SCI = 0110
RMSOUT (V)
RF INPUT VOLTAGE (mV)
TIME (us)
RF
INPUT
RMSOUT
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 18
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
Residual Ripple for 900 Mhz
WiBRO @ SCI=0100
Residual Ripple for 900 Mhz
WiBRO @ SCI=0110
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
-100
-80
-60
-40
-20
0
20
40
60
80
100
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
SCI = 0000
SCI = 0100
RMSOUT (V)
RF INPUT VOLTAGE (mV)
TIME (ms)
RF
INPUT
RMSOUT
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
-100
-80
-60
-40
-20
0
20
40
60
80
100
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
SCI = 0000
SCI = 0110
RMSOUT (V)
RF INPUT VOLTAGE (mV)
TIME (ms)
RF
INPUT
RMSOUT
Residual Ripple for 900 Mhz
LTE Downlink @ SCI=0100
Residual Ripple for 900 Mhz
LTE Downlink @ SCI=0110
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
0 0.1 0.2 0.3 0.4 0.5
SCI = 0000
SCI = 0100
TIME (ms)
RMSOUT (V)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
0 0.1 0.2 0.3 0.4 0.5
SCI = 0000
SCI = 0110
TIME (ms)
RMSOUT (V)
Residual Ripple for 900 Mhz
WCDMA4 @ SCI=0011
Residual Ripple for 900 Mhz
WCDMA4 @ SCI=0100
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
0 50 100 150 200 250 300 350 400 450
SCI = 0000
SCI = 0011
TIME (us)
RMSOUT (V)
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
0 50 100 150 200 250 300 350 400 450
SCI = 0000
SCI = 0100
TIME (us)
RMSOUT (V)
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 19
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
LOG-Slope and Intercept
The HMC1020LP4E provides for an adjustment of output scale with the use of an integrated operational amplier.
Logarithmic slope and intercept can be adjusted to “magnify” a specic portion of the input sensing range, and to fully
utilize the dynamic range of the RMS output.
A log-slope of 35.2 mV/dB (@1900 MHz) is set by connecting RMS Output to VSET through a resistor network for ß=1
(see application schematic).
The log-slope is adjusted by applying the appropriate resistors on the RMS and VSET pins. Log-intercept is adjusted
by applying a DC voltage to the VSET pin.
Optimized slope = ß * log-slope
Optimized intercept = log_intercept – (RFBK /RSET) * VBLINE
RFBK
RFBK // RSHUNT // RSET
ß = 1
2
When RFBK=0 to set RMSOUT=VSET, then ß=1/2
If RSET is not populated, then ß = ½ * (RFBK/ (RFBK // RSHUNT)) and intercept is at nominal value.
Example: The logarithmic slope can be simply increased by choosing appropriate RFBK and RSHUNT values while
not populating the RSET resistor on the evaluation board to keep the intercept at nominal value.
Setting RFBK =4.7K and RSHUNT = 2.2K results in an optimized slope of:
Optimized Slope = ß * log_slope = 1.57* 36.9mV / dB
Optimized Slope = 58 mV / dB
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
-70 -60 -50 -40 -30 -20 -10 0 10
High Slope
Nominal
INPUT POWER (dBm)
RMSOUT (V)
Slope = 58 mV/dB
Rset = open
Rfbk = 4.7 Kohm
Rshunt = 2.2 Kohm
Slope = 37.3 mV/dB
Rset = open
Rfbk = 4.7 Kohm
Rshunt = 4.7 Kohm
Slope Adjustment
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 20
DC Offset Compensation Loop
Internal DC offsets, which are input signal dependant, require continuous cancellation. Offset cancellation is a critical
function needed for maintenance of measurement accuracy and sensitivity. The DC offset cancellation loop performs
this function, and its response is largely dened by the capacitance (COFS) connected between COFSA, COFS pins.
COFS capacitor sets the loop bandwidth of the DC offset compensations. Higher COFS values are required for measuring
lower RF frequencies. The optimal loop bandwidth setting will allow internal offsets to be cancelled at a minimally
acceptable speed.
DC Offset Cancellation Loop ≈ Bandwidth , Hz
For example: loop bandwidth for DC cancellation with COFS = 1nF, bandwidth is ~62 kHz
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
-70 -60 -50 -40 -30 -20 -10 0 10
VBLINE = -3.2 V
VBLINE = -1.6 V
VBLINE = -0.8 V
VBLINE = 0 V
VBLINE = +0.8 V
VBLINE = +1.6 V
VBLINE = +3.2 V
INPUT POWER (dBm)
RMSOUT (V)
Rset = 24 Kohm
Rfbk = 4.7 Kohm
Rshunt = 2.2 Kohm
Intercept Adjustment
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 21
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
Standby Mode
The ENX pin can be used to force the power detector into a low-power standby mode. As ENX is deactivated, power
is restored to all of the circuits. There is no memory of previous conditions. Coming out of standby mode, internal
integration and COFS capacitors will require recharging, so if large SCI values have been chosen, the wake-up time
will be lengthened.
Modulation Performance – Crest factor performance
The HMC1020LP4E is capable of detecting the average power of RF signals with complex modulation schemes with
exceptional accuracy. The proprietary RMS detection core is optimized to accurately detect the RMS power of the
modulated RF signals with very high crest factors. This crest factor immune detection architecture of HMC1020LP4E
results in detection accuracy of better than 0.2 dB over the entire operating frequency and temperature range. The
response of the HMC1020LP4E to a WCDMA4TM test signal is compared with the CW response in the following plots:
Reading Error for WCDMA 4 Carrier wrt
CW Response @ +25 °C
Reading Error for WCDMA 4 Carrier wrt
CW Response @ 2200MHz
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
-70 -60 -50 -40 -30 -20 -10 0 10
100MHz
900MHz
1900MHz
2200MHz
2700MHz
3500MHz
3900MHz
INPUT POWER (dBm)
ERROR (dB)
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
-70 -60 -50 -40 -30 -20 -10 0 10
+25C
+85C
-40C
INPUT POWER (dBm)
ERROR (dB)
-1
-0.5
0
0.5
1
3 4 5 6 7 8 9 10 11 12 13 14
900 MHz error from CW (-22 dBm)
1900 MHz error from CW (-22 dBm)
2700 MHz error from CW (-20 dBm)
3900 MHz error from CW (-18 dBm)
INPUT SIGNAL CREST FACTOR (dB)
RMSOUT READING ERROR (dB)
RMSOUT Error vs.
Crest Factor over Frequency
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
POWER DETECTORS - SMT
11
11 - 22
PIN = RMSOUT / [log-slope] + [log-intercept], dBm
HMC1020LP4E
v02.0511
RMS POWER DETECTOR
SINGLE-ENDED, DC - 3.9 GHz
System Calibration
Due to part-to-part variations in log-slope and log-intercept, a system-level calibration is recommended to satisfy
absolute accuracy requirements. When performing this calibration, two test points near the top end and bottom-end
of the desired detection dynamic range should be chosen. It is best to measure the calibration points in the regions
(of frequency and amplitude) where accuracy is most important. The log-slope and log-intercept parameters should
be derived and then stored in nonvolatile memory. These parameters relate the RMSOUT output voltage reading of
HMC1020LP4E to the actual RMS power level as shown below:
The derivation procedure of the log-slope and log-intercept parameters is elaborated below:
For example if the following two calibration points were measured at 2.2 GHz:
With RMSOUT = 2.0338V at Pin = -10 dBm,
and RMSOUT = 0.5967V at Pin = -50 dBm
slope calibration constant = SCC
SCC = = (-50+10)/(0.5967-2.0338) =27.83 dB/V
intercept calibration constant = ICC
ICC = Pin – SCC *RMSOUT = -10 – 27.83 * 2.0338 = -66.60 dBm
Now performing a power measurement at -30 dBm:
RMSOUT measures 1.3089V
[Measured Pin] = [Measured RMSOUT]*SCC + ICC
[Measured Pin] = 1.3089*27.83 – 66.60 = -30.17 dBm
An error of only 0.17 dB
Factory system calibration measurements should be made using an input signal representative of the application. If
the power detector is intended to operate over a wide range of frequencies, then a central frequency should be chosen
for calibration.
Layout Considerations
• Mount RF input coupling capacitors close to the INP and INP pins.
• Solder the heat slug on the package underside to a grounded island which can draw heat away from the die with
low thermal impedance. The grounded island should be at RF ground potential.
• Connect power detector ground to the RF ground plane, and mount the supply decoupling capacitors close
to the supply pins.
Denitions
• Log-slope: slope of PIN –> RMSOUT transfer characteristic. In units of mV/dB
• Log-intercept: x-axis intercept of PIN –> RMSOUT transfer characteristic. In units of dBm.
• RMS Output Error: The difference between the measured PIN and actual PIN using a line of best t.
[measured_PIN] = [measured_ RMSOUT] / [best-t-slope] + [best-t-intercept], dBm
• Input Dynamic Range: the range of average input power for which there is a corresponding RMS output
voltage with “RMS Output Error” falling within a specic error tolerance.
• Crest Factor: Peak power to average power ratio for time-varying signals.
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Analog Devices Inc.:
HMC1020LP4ETR EVAL01-HMC1020LP4E HMC1020LP4E