WIRELESS COMMUNICATIONS DIVISION
TQ5131
RF
IN
VDD
DATA SHEET
GND
LO
IN
Mode Select/
LO Input
IFA Gain
Select
AMP's
IF Out
GIC
3V Cellular Band
CDMA/AMPS RFA/Mixer
IC
CDMA IF
IF Out Out
IF
Out
Features
Small size: SOT23-8
Single 3V operation
Product Description
The TQ5131 is a 3V, RFA/Mixer IC designed specifically for Cellular band
CDMA/AMPS applications. It’s RF performance meets the requirements of products
designed to the IS-95 and AMPS standards. The TQ5131 is designed to be used
with the TQ3131 (CDMA/AMPS LNA) which provides a complete CDMA receiver for
800MHz dual-mode phones.
The RFA/Mixer incorporates on-chip switches which determine CDMA, AMPS and
bypass mode select. When used with the TQ3131 (CDMA/AMPS LNA), four gain
steps are available. The RF input port is internally matched to 50
Ω,
greatly
simplifying the design and keeping the number of external components to a
minimum. The TQ5131 achieves good RF performance with low current
consumption, supporting long standby times in portable applications. Coupled with
the very small SOT23-8 package, the part is ideally suited for Cellular band mobile
phones.
Electrical
Specifications
1
Min
Typ
881
15.0
4.5
2.5
15.0
Max
Units
MHz
dB
dB
dBm
mA
Low-current operation
Gain Select
Mode Select
High IP3 performance
Few external components
Applications
IS-95 CDMA Mobile Phones
AMPS Mobile Phones
Dual Mode CDMA Cellular application
Parameter
Frequency
Gain
Noise Figure
Input 3
rd
Order Intercept
DC supply Current
Note 1: Test Conditions: Vdd=2.8V, RF=881MHz, LO=966MHz, IF=85MHz, Ta=25C, CDMA High Gain
state.
For additional information and latest specifications, see our website:
www.triquint.com
1
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