TRF1123 Datasheet, PDF (1/11 Pages) Texas Instruments – 2.1-GHz to 2.7-GHz 1-W Power Amplifier

TRF1123
www.ti.com
SLWS167A – APRIL 2005 – REVISED JULY 2005
2.1-GHz to 2.7-GHz 1-W Power Amplifier
FEATURES
• 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
VPOS
VNEG
VDD
RFO
Power
Supply
Power Amp /
Attenuator
Driver
Amplifier
Pre−Amp
PACNT
LP
RFI
DETN
DETP
PAGAIN1
PAGAIN0
DESCRIPTION
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.
KEY SPECIFICATIONS
• OP_1dB = 31.5 dBm, Typical
• 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
BLOCK DIAGRAM
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2005, Texas Instruments Incorporated