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Low Phase Noise
High Dynamic Range Image-Reject
Downconverter
Selectable IF Filters
Internal or External AGC Control With Peak
Detector and Voltage Reference
Analog Gain Control Range
Direct Interface to A/D
Dual VCO/PLL With On-Chip Resonator For
Double Down-Conversion Architecture
S-Band LO Frequency Range:
鈥?TRF1112: 1818 to 2268 MHz
鈥?TRF1212: 2818-MHz to 3382-MHz
UHF LO Frequency Range: 360 to 456 MHz
Phase Noise is 0.5 RMS Typ 100 Hz to 1 MHz
Rx Noise Figure of 5 dB, Typ
UHF LO Tuning Step Size of 125 kHz
Typical Gain of 90 dB, Including 15-dB Loss
IF2 SAW Filter
Input Third Order Intercept Point > 0 dBm
Input 1-dB Compression Point > -10 dBm
Gain Control Range of 90 dB Typ
The TRF1112 / TRF1212 are designed to function as
part of Texas Instruments 2.5-GHz and 3.5-GHz
complete radio chipsets, respectively. In the chipset,
two chips function together to double-down-convert
RF frequencies to an IF frequency that is suitable for
most baseband modem ADCs. The TRF1112 /
TRF1212 performs the second down conversion from
the first IF frequency (480 MHz typical) to a final IF
frequency (20-50 MHz). The radio chipset features
sufficient linearity, phase noise and dynamic range to
work in single carrier or multi-carrier, line-of-sight or
non-line-of-sight, IEEE standard 802.16, BWIF, or
proprietary systems. Due to the modular nature of the
chipset, it is ideal for use in systems that employ
transmit or receive diversity.
DEVICE INFORMATION
LPCC鈭?8 PACKAGE
(TOP VIEW)
EXTLO1N
EXTLO1P
VCCLO1
LO1OP
LO1ON
LO1BPA
LO1TUN
LO1BPB
IF2BIN
IF2BIP
IF2AIN
IF2AIP
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DESCRIPTION
The TRF1112 / TRF1212 are UHF-VHF down con-
verters with integrated UHF and S-band frequency
synthesizers for radio applications in the 2 GHz to 4
GHz range. The device integrates an image reject
mixer, IF gain blocks, automatic gain control (AGC),
and two complete phase locked loop (PLL) circuits
including: VCOs, resonator circuit, varactors, dividers,
and phase detectors.
CP2O
LD1
LF1
EN
FRBP
VCCD1
FR
VCCD2
CLK
DATA
LF2
LD2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
36
35
34
33
32
31
30
29
28
27
26
25
AGCO
IFBPB
IF1IP
IF1IN
VCCA
VCCB
VERR
VREF
VFB
VCCC
IF2AOP
IF2AON
Figure 1. TRF1112 / TRF1212 Pin Out
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.
CP2O
LO2TUN
LO2BPB
VDET
AGCI
LO2BPA
VCCLO2
BBON
BBOP
VBGR
IF2BON
IF2BOP
Copyright 漏 2005, Texas Instruments Incorporated
PRODUCT PREVIEW
48
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45
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41
40
39
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37
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