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1 W P-1dB Linear, 30-dB Gain Transmitter
Operates Over the 3300-MHz to 3800-MHz
Range
Two TTL Controlled, 1-bit, 16-dB Gain Steps
for 32 dB of Total Gain Control
Superior Linearity (+45 dBm IP3) Over the
Entire Frequency Range
Auto-Bias Design With PA Enable
Temperature Compensated Directional
Coupler Detector
Low Power Bias Mode
Internally Matched 50-鈩?Input and Output
VPOS
VNEG
VDD
Power
Supply
PACNT
LP
Driver
Amplifier
Pre-Amp
RFI
Power Amp /
Attenuator
RFO
DETN
DETP
PAGAIN1
PAGAIN0
DESCRIPTION
The TRF1223 is a highly integrated linear transmitter / power amplifier (PA) 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 P
1dB
of +30 dBm and a third order
intercept of +45 dBm.
The TRF1223 is designed to function as a part of Texas Instruments complete 3.5-GHz chip set. The TRF1223 is
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
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OP
1dB
= +30 dBm
Output IP3 = +45 dBm, Typical
Gain = 30 dB, Typical
Gain Flatness over Transmit Band 鹵2 dB
Frequency Range = 3300 MHz to 3800 MHz
鹵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 漏 2005, Texas Instruments Incorporated
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