WIRELESS COMMUNICATIONS DIVISION
PCS
LNA
GND
16
GND
VDD
PCS
14
MODE
CTL
13
15
TQ3M31
DATA SHEET
12
PCS
LNA
OUT
PCS_LNA
input
1
GND
2
11
GND
Dual Band LNA: 2.8V
Cellular and PCS Band
CDMA/AMPS LNA IC
GND
3
10
GND
Cell_LNA
input
4
9
Cell
LNA
OUT
Features
5
Cell
LNA
GND
6
GND
7
Vdd
Cell
8
Small size: Leadless 3x3mm
Gain
CTL
Product Description
Single 2.8V operation
Low-current operation
Gain Select
Mode Select
High IP3 performance
Few external components
The TQ3M31 is a 2.8V, RF dual band LNA IC designed specifically for Cellular &PCS
band CDMA/AMPS applications. It’s RF performance meets the requirements of
products designed to the IS-95 and AMPS standards. The TQ3M31 is designed to
be used with the TQ5131 (Cellular CDMA/AMPS mixer) and the TQ5631 (PCS
CDMA mixer) which provides a complete Tri-Mode CDMA receiver for 800MHz dual-
mode and 1900MHz phones.
The LNA incorporates on-chip switches which determine CDMA, AMPS, and bypass
mode select. When used with the TQ5131 and TQ5631, four gain states are
available in each band. 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 TQ3M31 achieves good RF performance with low current
consumption, supporting long standby times in portable applications. Coupled with
the very small MLF 3x3 package, the part is ideally suited for Cellular & PCS band
mobile phones.
Electrical Specifications
1
Parameter
Gain
Noise Figure
Input 3
rd
Order Intercept
DC supply Current
881MHz
1960MHz
881MHz
1960MHz
881MHz
1960MHz
881MHz
1960MHz
Min
Typ
13.0
13.5
1.4
1.5
12.5
9.0
10.0
11.0
Max
Units
dB
dB
dB
dB
dBm
dBm
mA
mA
Applications
IS-95 CDMA Mobile Phones
AMPS Mobile Phones
Dual Mode CDMA Cellular applications
Dual Band CDMA Cellular & PCS
832-870MHz CDMA applications
1930-1990MHz CDMA applications
Note 1: Test Conditions: Vdd=2.8V, Tc=25C, CDMA High Gain state.
For additional information and latest specifications, see our website:
www.triquint.com
1
TRIQUINT [ TRIQUINT SEMICONDUCTOR ]
