TRF1222 Datasheet, PDF (1/12 Pages) Texas Instruments – 3.5-GHz Integrated Up-Converter

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TRF1222
TRF1222
SLWS171A – APRIL 2005 – REVISED DECEMBER 2005
3.5-GHz Integrated Up-Converter
FEATURES
• Performs Up-Conversion in 3.5-GHz Radios
(3300-3800 MHz)
• Integrated IF amplifier, Mixer and LO Buffer
Amplifier
• Provision for external Image Reject /
Band-Pass Filter
• TTL Switched Attenuator For Gain Control
• TTL Controlled Amplifier Power Down
KEY SPECIFICATIONS
• RF Frequency Range: 3300-3800 MHz
• 18 dB of Gain with 16-dB Digital Attenuator
• Output P-1dB: +14 dBm, Typical
• Output IP3: +24 dBm, Typical
• LO Drive Level = 0 dBm, Typical
DESCRIPTION
The TRF1222 up-converts a UHF IF signal to an RF signal in the 3300 to 3800 MHz range for 3.5-GHz radio
applications. The TRF1222 has 18 dB of gain and an output P-1dB of 14 dBm, typical. A TTL compatible, 1-bit
16-dB digital attenuator is provided for gain control and the IF and RF amplifiers can be shut off via a TTL control
signal for power critical or TDD applications. In order to provide system requirements for LO/spurious rejection,
the TRF1222 offers a signal path to an off-chip band-pass filter. Specifications are provided assuming an in-band
2-dB insertion loss filter.
The TRF1222 is designed to complete the second up-conversion in Texas Instruments complete 3.5-GHz chip
set. The linear nature of the up-converter makes it ideal for complex modulations schemes such as high order
QAM or OFDM.
BPF
RFI
MXRO
RFO
RF AMPLIFIER
Mixer
BALUN
VGA
IFIP
IFIN
Power
Supply
LO Buffer
LOP
LON
−VNEG
VDD
UCEN
UCATTN
Figure 1. Block Diagram
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