TRF1122_07 Datasheet, PDF (1/10 Pages) Texas Instruments – 2.5-GHz Integrated Up-Converter

TRF1122
www.ti.com
SLWS173B – APRIL 2005 – REVISED SEPTEMBER 2006
2.5-GHz Integrated Up-Converter
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 Power Down
• RF Frequency Range: 2100 - 2700 MHz
• 20 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 20 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
assuming 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
TRF1122
(TOP VIEW)
32 31 30 29 28 27 26 25
IADJ 1
24 MXRADJ
VDD2 2
23 UCEN
GND 3
22 MXRO
UCATTN 4
21 GND
GND 5
20 IFIN
RFO 6
19 IFIP
LOADJ1 7
18 VDDIFP
VNEG 8
17 VDDIFN
9 10 11 12 13 14 15 16
Figure 1. TRF1122 Pin Out
P0042-01
RFO
BPF
RFI
MXRO
RF Amplifier
Mixer
BALUN
VGA
IFIP
IFIN
Power
Supply
LO Buffer
LOP
LON
UCATTN
UCEN VDD –VNEG
B0084-02
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.
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 © 2005–2006, Texas Instruments Incorporated