Features
•
Single 3-V Supply Voltage
•
High-power-added Efficient Power Amplifier (Pout Typically 28 dBm)
•
Ramp-controlled Output Power
•
Low-noise Preamplifier (NF Typically 2.1 dB)
•
Biasing for External PIN Diode T/R Switch
•
Current-saving Standby Mode
•
Few External Components
•
Package: QFN20
1. Description
The T7026 is a monolithic SiGe transmit/receive front-end IC with power amplifier,
low-noise amplifier and T/R switch driver. It is especially designed for operation in
TDMA systems like DECT, IEEE 802.11 FHSS WLAN, home RF and ISM proprietary
radios. Due to the ramp-control feature and a very low quiescent current, an external
switch transistor for VS is not required.
Electrostatic sensitive device.
Observe precautions for handling.
Figure 1-1. Block Diagram
GND
V2_PA
V1_PA
VS_LNA
V3_PA_OUT
LNA_IN
PA_IN
V2_PA
GND
RAMP
GND
PU
TX/RX
standby
control
LNA PA
RX_ON
LNA_OUT
GND
R_SWITCH
SWITCH_OUT_RX
SiGe FE
TX
V3_PA_OUT
V3_PA_OUT
T7026
SWITCH_OUT_TX
ISM 2.4 GHz
Front End IC
T7026
Rev. 4563E–ISM–07/05
2
4563E–ISM–07/05
T7026
2. Pin Configuration
Figure 2-1. Pinning QFN20
1
2
3
4
5
15
14
13
12
11
10 6789
16 20
191817
RX_ON
R_SWITCH
SWITCH_OUT_RX
SWITCH_OUT_TX
GND_LNA1
V3_PA_OUT
V3_PA_OUT
V3_PA_OUT
GND_LNA2
LNA_IN
V2_PA
V2_PA
GND
V1_PA
NC
RAMP
PA_IN
VS_LNA
LNA_OUT
PU
T7026
Figure 2-2. Pin Description
Pin Symbol Function
1 RX_ON RX active high
2 R_SWITCH Resistor to GND sets the PIN diode current
3 SWITCH_OUT_RX Switched current output for PIN diode (active in RX mode)
4 SWITCH_OUT_TX Switched current output for PIN diode (active in TX mode)
5 GND_LNA1 Ground
6 LNA_IN Low-noise amplifier input
7 GND_LNA2 Ground
8 V3_PA_OUT Inductor to power supply and matching network for power amplifier output
9 V3_PA_OUT Inductor to power supply and matching network for power amplifier output
10 V3_PA_OUT Inductor to power supply and matching network for power amplifier output
11 V2_PA Inductor to power supply for power amplifier
12 V2_PA Inductor to power supply for power amplifier
13 GND Ground
14 V1_PA Supply voltage for power amplifier
15 NC Not connected
16 RAMP Power ramping control input
17 PA_IN Power amplifier input
18 VS_LNA Supply voltage input for low-noise amplifier
19 LNA_OUT Low-noise amplifier output
20 PU Power-up active high
Slug GND Ground
3
4563E–ISM–07/05
T7026
3. Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
All voltages are referred to ground (pins GND and slug)
Parameters Symbol Value Unit
Supply voltage
Pins VS_LNA, V1_PA, V2_PA and
V3_PA_OUT, no RF
VS5V
Junction temperature Tj150 °C
Storage temperature Tstg –40 to +125 °C
RF input power LNA PinLNA 5dBm
RF input power PA PinPA 10 dBm
4. Thermal Resistance
Parameters Symbol Value Unit
Junction ambient QFN20, slug soldered on
PCB RthJA 27 K/W
5. Operating Range
All voltages are referred to ground (pins GND and slug). Power supply points are VS_LNA, V1_PA, V2_PA, V3_PA_OUT. The following
table represents the sum of all supply currents depending on the TX/RX mode.
Parameters Symbol Min. Typ. Max. Unit
Supply voltage
Pins V1_PA, V2_PA and V3_PA_OUT VS2.7 3.6 4.6 V
Supply voltage Pin VS_LNA VS2.7 3.0 5.5 V
Supply current
TX
RX
IS
IS
470
8
mA
mA
Standby current PU = 0 IS10 µA
Ambient temperature Tamb –25 +25 +70 °C
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4563E–ISM–07/05
T7026
6. Electrical Characteristics
Test conditions (unless otherwise specified): VS = 3.6 V, T
amb
= 25°C
Parameters Test Conditions Symbol Min. Typ. Max. Unit
Power Amplifier(1)
Supply voltage Pins V1_PA, V2_PA and
V3_PA_OUT VS2.7 3.6 4.6 V
Supply current TX IS_TX 470 mA
RX (PA off), VRAMP ≤ 0.1 V IS_RX 10 µA
Standby current Standby for VRAMP ≤ 0.1 V IS_standby 10 µA
Frequency range TX f 2.4 2.5 GHz
Gain-control range TX ∆Gp 60 42 dB
Power gain maximum TX
Pin PA_IN to V3_PA_OUT
Gp 28 33 34 dB
Power gain minimum Gp –40 –17 dB
Ramping voltage maximum TX, power gain (max), pin RAMP VRAMP max 1.6 1.65 1.7 V
Ramping voltage minimum TX, power gain (min), pin RAMP VRAMP min 1V
Ramping current maximum TX, VRAMP = 1.75 V, pin RAMP IRAMP max 0.1 mA
Power-added efficiency TX PAE 33 37 %
Saturated output power TX, input power = 0 dBm referred to
pins V3_PA_OUT Psat 27 28 29 dBm
Input matching(2) TX pin PA_IN Load
VSWR < 1.5:1
Output matching(2) TX pins V3_PA_OUT Load
VSWR < 1.5:1
Harmonics at P 1dBCP TX pins V3_PA_OUT 2 fo –30 dBc
Harmonics at P 1dBCP TX pins V3_PA_OUT 3 fo –30 dBc
T/R-switch Driver (Current Programming by External Resistor from R_SWITCH to GND)
Switch-out current output
Standby, pin SWITCH_OUT IS_O_standby 1µA
RX IS_O_RX 1µA
TX at 100 ΩIS_O_100 1.7 mA
TX at 1.2 kΩIS_O_1k2 7mA
TX at 33 kΩIS_O_33k 17 mA
TX at R switch open IS_O_R 19 mA
I_Switch_Out_RX maximum 7mA
Low-noise Amplifier(3)
Supply voltage All, pin VS_LNA VS2.7 3.0 5 V
Supply current RX IS810mA
Supply current
(LNA and control logic)
TX (control logic active)
pin VS_LNA IS0.5 mA
Standby current Standby, pin VS_LNA IS_standby 110µA
Frequency range RX f 2.4 2.5 GHz
Notes: 1. Power amplifier shall be unconditionally stable, maximum duty cycle 100%, true cw operation, maximum load mismatch
and duration: VSWR = 8:1 (all phases) 10 s, ZG = 50 Ω, VS = 3.6 V.
2. With external matching network, load impedance 50 Ω.
3. Low-noise amplifier shall be unconditionally stable.
4. With external matching components.
5
4563E–ISM–07/05
T7026
Power gain RX, pin LNA_IN to LNA_OUT Gp 15 16 19 dB
Noise figure RX NF 2.1 2.3 dB
Gain compression RX, referred to pin LNA_OUT O1dB –9 –7 –6 dBm
Third-order input interception point RX IIP3 –16 –14 –13 dBm
Input matching(4) RX, pin LNA_IN VSWRin < 2:1
Output matching(4) RX, pin LNA_OUT VSWRout < 2:1
Logic Input Levels (RX_ON, PU)
High input level = 1, pins RX_ON and PU ViH 2.4 VS, LNA V
Low input level = 0ViL 00.5V
High input current = 1, ViH = 2.4 V IiH 40 60 µA
Low input current = 0IiL 0.2 µA
7. Control Logic for LNA and T/R-switch Driver
Operation Mode PU RX_ON
Standby 0 0
TX 1 0
RX 1 1
6. Electrical Characteristics (Continued)
Test conditions (unless otherwise specified): VS = 3.6 V, T
amb
= 25°C
Parameters Test Conditions Symbol Min. Typ. Max. Unit
Notes: 1. Power amplifier shall be unconditionally stable, maximum duty cycle 100%, true cw operation, maximum load mismatch
and duration: VSWR = 8:1 (all phases) 10 s, ZG = 50 Ω, VS = 3.6 V.
2. With external matching network, load impedance 50 Ω.
3. Low-noise amplifier shall be unconditionally stable.
4. With external matching components.
6
4563E–ISM–07/05
T7026
8. Input/Output Circuits
Figure 8-1. Internal Circuitry; PA_IN, V1_PA
Figure 8-2. Internal Circuitry; RAMP, V1_PA
Figure 8-3. Internal Circuitry V2_PA
PA_IN
V1_PA
GND
V1_PA
RAMP
V2_PA
GND
7
4563E–ISM–07/05
T7026
Figure 8-4. Internal Circuitry V3_PA_OUT
Figure 8-5. Internal Circuitry SWITCH_OUT_RX, SWITCH_OUT_TX, R_SWITCH, V1_PA
Figure 8-6. Internal Circuitry LNA_IN, VS_LNA
V3_PA_OUT
GND
V1_PA
GND
SWITCH_OUT_RX/
SWITCH_OUT_TX
R_SWITCH
VS_LNA
GND
LNA_IN
8
4563E–ISM–07/05
T7026
Figure 8-7. Internal Circuitry PU, RX_ON, VS_LNA
Figure 8-8. Internal Circuitry LNA_OUT, VS_LNA
VS_LNA
RX_ON/
PU
VS_LNA
GND
LNA_OUT
9
4563E–ISM–07/05
T7026
10. Package Information
9. Ordering Information
Extended Type Number Package Remarks MOQ
T7026-PGQ QFN20 Taped and reeled 6,000
T7026-PGP QFN20 Taped and reeled 1,500
T7026-PGQW QFN20, Pb-free, halogen-free Taped and reeled 6,000
T7026-PGPW QFN20, Pb-free, halogen-free Taped and reeled 1,500
Printed on recycled paper.
4563E–ISM–07/05 xM
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