TQ3131 Datasheet, PDF (1/16 Pages) TriQuint Semiconductor – 3V Cellular Band CDMA/AMPS LNA IC

WIRELESS COMMUNICATIONS DIVISION
Control
Logic ^C2
GND
C2
L1
VDD
GND
TQ3131
DATA SHEET
3V Cellular Band
CDMA/AMPS LNA IC
RF
RF 50 ohm
IN
OUT RF Out
GND
C3
Control
Logic
Product Description
The TQ3131 is a 3V, RF LNA 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 TQ3131 is designed to be used with the
TQ5131 (CDMA/AMPS mixer) which provides a complete CDMA receiver for
800MHz dual-mode phones.
The LNA incorporates on-chip switches which determine CDMA, AMPS, and bypass
mode select. When used with the TQ5131 (CDMA RFA/mixer), four gain states are
available. The RF output port is internally matched to 50 Ω, greatly simplifying the
design and keeping the number of external components to a minimum. The TQ3131
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 Specifications¹
Parameter
Frequency
Min
Typ
Max
Units
832
894
MHz
Gain
13.0
dB
Noise Figure
1.4
dB
Input 3^rd Order Intercept
10.0
dBm
DC supply Current
10.5
mA
Note 1: Test Conditions: Vdd=2.8V, Tc=25C, RF frequency=881MHz, CDMA High Gain state.
Features
Small size: SOT23-8
Single 3V operation
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 applications
832-870MHz CDMA applications
For additional information and latest specifications, see our website: www.triquint.com
1