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FEATURES

RFO

RFI

Power Amp /

Attenuator

Pre−Amp

Power

Supply

VDD

PACNT

PAGAIN1

PAGAIN0

VPOS

VNEG

DETN

DETP

LP

Driver

Amplifier

DESCRIPTION

KEY SPECIFICATIONS

BLOCK DIAGRAM

TRF1123

SLWS167B – APRIL 2005 – REVISED SEPTEMBER 2006

2.1-GHz to 2.7-GHz 1-W Power Amplifier

•

1.5 W P-1 dBm Linear, 30-dB Gain

Transmitter

•

Operates Over the MMDS, MDS, and WCS

Bands (2.1 GHz to 2.7 GHz)

•

Two TTL Controlled, 1-bit, 16-dB Gain Steps

•

Superior Linearity Over the Entire Gain

Range

•

PACNT Signal Enables and Disables PA

•

Internally Matched 50-

Ω Input and Output

The TRF1123 is a highly integrated linear transmitter power amplifier MMIC. The chip has two 16-dB gain steps

that provide a total of 32-dB gain control via 1-bit TTL control signals. The chip also integrates a TTL mute

function that turns off the amplifiers for power critical or TDD applications. A temperature compensated detector

is included for output power monitor or ALC applications. The chip has a typical P1dB of 31.5 dBm and a third

order intercept of 52 dBm.

The TRF1123 is designed to function as a part of Texas Instruments complete 2.5-GHz chip set. The TRF1123

is used as the output power amplifier or a driver amplifier for higher power applications. The linear nature of the

transmitter makes it ideal for complex modulations schemes such as high order QAM or OFDM.

•

•

Output IP3 = 52 dBm, Typical

•

Gain = 30 dB, Typical

•

Gain Flatness Over Transmit Band ±2.5 dB

•

Frequency Range: 2.1 GHz to 2.7 GHz

•

±0.5-dB Detected Output voltage vs Temperature

The detailed block diagram and the pin-out of the ASIC are shown in Figure 1.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright © 2005–2006, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.