THIS PAGE INTENTIONALLY LEFT BLANK
11
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
SWITCHES - SPDT - SMT
11 - 216
v02.1009 GaAs MMIC 40W FAILSAFE
SWITCH, 0.1 - 2.1 GHz
General Description
Features
Functional Diagram
High Input P0.1dB: +46 dBm Tx
Low Insertion Loss: 0.4 dB
High IIP3: +74 dBm
Single Positive Control: 0/+3V to 0/+8V
Failsafe operation; Tx ‘On’ when unpowered
2x2mm DFN SMT Package
Electrical Speci cations, TA = +25°C, Vdd= 5V, Vctl = 0/+5 Vdc, 50 Ohm System*
Typical Applications
The HMC646LP2(E) is ideal for:
• LNA Protection & T/R Switching
• TD-SCDMA / 3G Infrastructure
• Satellite Subscriber Terminals
• Private Mobile Radio & Public Safety Handsets
• Automotive Telematics
The HMC646LP2(E) is an SPDT switch in a leadless
DFN surface mount plastic package for use in trans-
mit / receive and LNA protection applications which
require very low distortion and high power handling
of up to 40 watts with less than 10% duty cycle. This
robust switch can control signals from 100 - 2100
MHz* and is ideal for TD-SCDMA / 3G repeaters,
PMR, automotive telematics, and satellite subscriber
terminal applications. The design provides excep-
tional P0.1dB of +46 dBm and +74 dBm IIP3 on the
Transmit (Tx) port. The failsafe topology provides a
low loss path from Tx to RFC, when no DC power is
available.
HMC646LP2 / 646LP2E
Parameter Min. Typ. Max. Min. Typ. Max. Min. Typ. Max Units
Frequency Range 869 - 960 1525 - 1661 2010 - 2025 MHz
Insertion Loss Tx - RFC
RFC - Rx
0.3
0.4
0.6
0.7
0.6
0.8
0.9
1.1
0.7
1.3
1.0
1.7
dB
dB
Isolation Tx - RFC
RFC - Rx
20
28
27
38
15
20
22
30
12
25
17
32
dB
dB
Return Loss Tx - RFC
RFC - Rx
17
25
27
20
25
12
dB
dB
Input Power for 0.1 dB
Compression
Tx - RFC
RFC - Rx
44
20
46
20
46
20
dBm
dBm
Input Third Order
Intercept (Two-tone input
power = +17 dBm each tone)
Tx - RFC
RFC - Rx
71
41
74
42
74
34
dBm
dBm
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, (50% CTL to 90% RF)
tOFF (50% CTL to 10% RF)
100
320
320
100
320
320
100
320
320
ns
ns
ns
* Speci cations and data re ect HMC646LP2(E) measured using the respective application circuits for each
designated frequency band found herein
11
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
SWITCHES - SPDT - SMT
11 - 217
Input IP3 vs. Voltage with 915 MHz Tuning
Return Loss with 915 MHz Tuning
Insertion Loss vs. Temperature,
Tx with 915 MHz Tuning
Isolation with 915 MHz Tuning
Insertion Loss vs. Temperature,
Rx with 915 MHz Tuning
v02.1009
HMC646LP2 / 646LP2E
GaAs MMIC 40W FAILSAFE
SWITCH, 0.1 - 2.1 GHz
-2
-1.5
-1
-0.5
0
0.8 0.85 0.9 0.95 1
+25C
+85C
-40C
INSERTION LOSS (dB)
FREQUENCY (GHz)
-2
-1.75
-1.5
-1.25
-1
-0.75
-0.5
-0.25
0
0.8 0.85 0.9 0.95 1
+25C
+85C
-40C
INSERTION LOSS (dB)
FREQUENCY (GHz)
-40
-30
-20
-10
0
0.8 0.85 0.9 0.95 1
Tx, Input
Tx, Output
Rx, Input
Rx, Output
RETURN LOSS (dB)
FREQUENCY (GHz)
-50
-40
-30
-20
-10
0
0.8 0.85 0.9 0.95 1
RFC to Tx
RFC to RX
ISOLATION (dB)
FREQUENCY (GHz)
25
30
35
40
45
50
55
60
65
70
75
345678
Tx
Rx
IP3 (dBm)
VOLTAGE (V)
11
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
SWITCHES - SPDT - SMT
11 - 218
Input IP3 vs. Voltage with 1600 MHz Tuning
Return Loss with 1600 MHz Tuning
Insertion Loss vs. Temperature,
Tx with 1600 MHz Tuning
Isolation with 1600 MHz Tuning
Insertion Loss vs. Temperature,
Rx with 1600 MHz Tuning
v02.1009
HMC646LP2 / 646LP2E
GaAs MMIC 40W FAILSAFE
SWITCH, 0.1 - 2.1 GHz
-2
-1.5
-1
-0.5
0
1.5 1.55 1.6 1.65 1.7
+25C
+85C
-40C
INSERTION LOSS (dB)
FREQUENCY (GHz)
-2
-1.5
-1
-0.5
0
1.5 1.55 1.6 1.65 1.7
+25C
+85C
-40C
INSERTION LOSS (dB)
FREQUENCY (GHz)
-40
-30
-20
-10
0
1.5 1.55 1.6 1.65 1.7
Tx, Input
Tx, Output
Rx, Input
Rx, Output
RETURN LOSS (dB)
FREQUENCY (GHz)
-50
-40
-30
-20
-10
0
1.5 1.55 1.6 1.65 1.7
RFC to Tx
RFC to RX
ISOLATION (dB)
FREQUENCY (GHz)
25
30
35
40
45
50
55
60
65
70
75
80
345678
Tx
Rx
IP3 (dBm)
VOLTAGE (V)
11
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
SWITCHES - SPDT - SMT
11 - 219
Input IP3 vs. Voltage with 2015 MHz Tuning
Return Loss with 2015 MHz Tuning
Insertion Loss vs. Temperature,
Tx with 2015 MHz Tuning
Isolation with 2015 MHz Tuning
Insertion Loss vs. Temperature,
Rx with 2015 MHz Tuning
v02.1009
HMC646LP2 / 646LP2E
GaAs MMIC 40W FAILSAFE
SWITCH, 0.1 - 2.1 GHz
-2
-1.5
-1
-0.5
0
1.95 2 2.05 2.1
+25C
+85C
-40C
INSERTION LOSS (dB)
FREQUENCY (GHz)
-2
-1.5
-1
-0.5
0
1.95 2 2.05 2.1
+25C
+85C
-40C
INSERTION LOSS (dB)
FREQUENCY (GHz)
-35
-30
-25
-20
-15
-10
-5
0
1.95 2 2.05 2.1
Tx, Input
Tx, Output
Rx, Input
Rx, Output
RETURN LOSS (dB)
FREQUENCY (GHz)
-40
-30
-20
-10
0
1.95 2 2.05 2.1
RFC to Tx
RFC to RX
ISOLATION (dB)
FREQUENCY (GHz)
25
30
35
40
45
50
55
60
65
70
75
80
345678
Tx
Rx
IP3 (dB)
VOLTAGE (V)
11
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
SWITCHES - SPDT - SMT
11 - 220
Absolute Maximum Ratings
Outline Drawing
Vdd = 5V
Max. CW Input Power Tx Por t
Rx Port
+44.00 dBm
+36.75 dBm
Max Channel Temp. 150 °C
Thermal Resistance Tx Por t
Rx Port
14.75 °C/ W
14.75 °C/ W
Continuous Dissipated Power Tx Por t
Rx Port
4.4 W
4.4 W
Supply Voltage (Vdd) +10V Vdc
Control Voltage Range (Vctl) -0.2 to Vdd + 1.0 Vdc
Storage Temperature -65 to +150 °C
Operating Temperature -40 to +85 °C
Control Input Signal Path State
Vctl Vdd RFC To Tx RFC to Rx
0.0 0.0 ON OFF
0.0 Vdd OFF ON
Vdd Vdd ON OFF
Vdd = +3V to +8V
Control Input Voltage Tolerances are ± 0.2 Vdc.
DC blocking capacitors are required at ports RFC, Tx and Rx.
Truth Table
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Part Number Package Body Material Lead Finish MSL Rating Package Marking [3]
HMC646LP2 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] 646
XXX
HMC646LP2E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] 646
XXX
[1] Max peak re ow temperature of 235 °C
[2] Max peak re ow temperature of 260 °C
[3] 3-Digit lot number XXX
Package Information
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 HITTITE APPLICATION NOTE FOR SUGGESTED
LAND PATTERN.
v02.1009
HMC646LP2 / 646LP2E
GaAs MMIC 40W FAILSAFE
SWITCH, 0.1 - 2.1 GHz
11
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
SWITCHES - SPDT - SMT
11 - 221
Pin Descriptions
Pin Number Function Description Interface Schematic
1 Tx This pin is DC coupled and matched to 50 Ohms.
2 N/C Not Connected
3ACG External capacitor to ground is required.
See application circuit herein.
4 Rx This pin is DC coupled and matched to 50 Ohms.
5 Vctl See truth table.
6 RFC This pin is DC coupled and matched to 50 Ohms.
GND Package bottom has exposed metal paddle
that must be connected to PCB RF ground.
v02.1009
HMC646LP2 / 646LP2E
GaAs MMIC 40W FAILSAFE
SWITCH, 0.1 - 2.1 GHz
11
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
SWITCHES - SPDT - SMT
11 - 222
Application Circuit
Tuned Frequency 915 MHz 1600 MHz 2015 MHz
Eva lua tio n PCB N umb er 1180 9 8 1180 9 9 11810 0
C1, C3, C5 [1] 1000 pF 330 pF 330 pF
C2 2.7 pF 1.5 pF 1.1 pF
C4 1000 pF 100 pF 100 pF
C6 1.8 pF 0.5 pF 0.5 pF
C7 15 pF 4.7 pF 2.7 pF
L1 15 nH 3.9 nH 1.8 nH
L2 9 nH 4.3 nH 3.3 nH
R1 10 k 10 k 10 k
[1] DC blocking capacitors
Components for Selected Frequencies
v02.1009
HMC646LP2 / 646LP2E
GaAs MMIC 40W FAILSAFE
SWITCH, 0.1 - 2.1 GHz
11
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
SWITCHES - SPDT - SMT
11 - 223
Evaluation PCB
List of Materials for Evaluation PCB [1]
Item Description
J1 - J3 PCB Mount SMA RF Connector
J4 - J5 2mm DC Header
C1 - C7 [2] Capacitor, 0402 Pkg.
L1 - L2 [2] Inductor, 0402 Pkg.
R1 [2] Resistor, 0402 Pkg.
U1 HMC646LP2(E) T/R Switch
PCB [3] 110780 Evaluation PCB
[1] When requesting an evaluation board, please reference
the appropriate evaluation PCB number listed in the table
“Components for Selected Frequencies.”
[2] Please refer to “Components for Selected Frequencies” table
for values.
[3] Circuit Board Material: Rogers 4350
The circuit board used in the nal application
should be generated with proper RF circuit design
techniques. Signal lines at the RF port should have
50 ohm impedance and the package ground leads
and exposed paddle should be connected directly
to the ground plane similar to that shown above. The
evaluation circuit board shown above is available
from Hittite Microwave Corporation upon request.
v02.1009
HMC646LP2 / 646LP2E
GaAs MMIC 40W FAILSAFE
SWITCH, 0.1 - 2.1 GHz
