WIRELESS COMMUNICATIONS DIVISION

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1

TQ5631

DATA SHEET

3V PCS Band CDMA

RFA/Mixer IC

Features

Small size: SOT23-8

Single 3V operation

Low-current operation

Gain Select

High IP3 performance

Few external components

Applications

IS-95 CDMA Mobile Phones

Product Description

The TQ5631 is a 3V, RFAmplifier/Mixer IC designed specifically for PCS band CDMA

applications. It’s RF performance meets the requirements of products designed to

the IS-95 standards. The TQ5631 is designed to be used with the TQ3631 (CDMA

LNA) which provides a complete CDMA receiver for 1900MHz phones.

The RFA/Mixer incorporates on-chip switches which determine gain select states.

When used with the TQ3631 (CDMA LNA), four gain steps are available. The RF

input port is internally matched to 50

the number of external components to a minimum. The TQ5631 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 PCS band mobile phones.

Parameter

Min

Typ

Max

Units

Frequency

1960

MHz

Gain

15.0

dB

Noise Figure

5.7

dB

1.0

dBm

DC supply Current

20.0

mA

Note 1: Test Conditions: Vdd=2.8V, RF=1960MHz, LO=1750MHz, IF=210MHz, Ta=25C,

LO input –4dBm, CDMA High Gain state.

RF

IN

VDD

GND

VDD

LO

IN

GND

IF

out

GIC