TRF1122 Datasheet, PDF (1/2 Pages) Texas Instruments – 2.5-GHz Integrated Up-Converter

TRF1122
www.ti.com
2.5-GHz Integrated Up-Converter
SLWS173 – APRIL 2005
FEATURES
• Performs Up-Conversion in 2.5-GHz Radios
MDS/MMDS/WCS
• 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 Blanking
• RF Frequency Range: 2100 - 2700 MHz
• 18 dB of Gain with 16-dB Switched Attenuator
• Output P-1 dB: +14 dBm, Typical
• Output IP3: +24 dBm, Typical
• LO Drive Level = 0 dBm, Typical
DESCRIPTION
The TRF1122 up-converts a UHF IF signal to an RF
signal in the 2100-MHz to 2700-MHz range for
2.5-GHz radio applications. The TRF1122 has 18 dB
of gain and an output P-1 dB of +14 dBm, typical. A
TTL compatible, 1-bit 16-dB switched 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
TRF1122 offers a signal path to an off-chip
band-pass filter. Specifications are provided as-
suming an in-band 2-dB insertion loss filter.
The TRF1122 is designed to complete the second
up-conversion in Texas Instruments complete
2.5-GHz chip set. The linear nature of the
up-converter makes it ideal for complex modulations
schemes such as high order QAM or OFDM.
DEVICE INFORMATION
LPCC−32 PACKAGE
(TOP VIEW)
IADJ
VDD2
GND
UCATTN
GND
RFO
LOADJ1
VNEG
32 31 30 29 28 27 26 25
1
24
2
23
3
22
4
21
5
20
6
19
7
18
8
17
9 10 11 12 13 14 15 16
MXRADJ
UCEN
MXRO
GND
IFIN
IFIP
VDDIFP
VDDIFN
Figure 1. TRF1122 Pin Out
RFO
BPF
RFI
MXRO
RF AMPLIFIER
Mixer
BALUN
VGA
IFIP
IFIN
Power
Supply
LO Buffer
LOP
LON
−VNEG
VDD
UCEN
UCATTN
Figure 2. Functional 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.
PRODUCT PREVIEW information concerns products in the forma-
tive or design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the
right to change or discontinue these products without notice.
Copyright © 2005, Texas Instruments Incorporated