TRF371125 Datasheet, PDF (1/46 Pages) Texas Instruments – INTEGRATED IQ DEMODULATOR

TRF371125
www.ti.com
SLWS219A – JANUARY 2010 – REVISED MARCH 2010
INTEGRATED IQ DEMODULATOR
Check for Samples: TRF371125
FEATURES
1
•2 Frequency Range: 700 MHz to 4000 MHz
• Integrated Baseband Programmable-Gain
Amplifier
• On-Chip Programmable Baseband Filter
• High Out-of-Band IP3: 24 dBm at 2400 MHz
• High Out-of-Band IP2: 60 dBm at 2400 MHz
• Hardware and Software Power Down
• Three-Wire Serial Interface
• Single Supply: 4.5-V to 5.5-V Operation
• Silicon Germanium Technology
APPLICATIONS
• Multicarrier Wireless Infrastructure
• WiMAX
• High-Linearity Direct-Downconversion
Receiver
• LTE (Long Term Evolution)
DESCRIPTION
The TRF371125 is a highly linear and integrated
direct-conversion quadrature demodulator. The
TRF371125 integrates balanced I and Q mixers, LO
buffers, and phase splitters to convert an RF signal
directly to I and Q baseband. The on-chip
programmable-gain amplifiers allow adjustment of the
output signal level without the need for external
variable-gain (attenuator) devices. The TRF371125
integrates programmable baseband low-pass filters
that attenuate nearby interference, eliminating the
need for an external baseband filter.
Housed in a 7-mm × 7-mm QFN package, the
TRF371125 provides the smallest and most
integrated receiver solution available for
high-performance equipment.
To Microcontroller
To Microcontroller
RFin
GNDDIG
VCCDIG
CHIP_EN
VCCMIX1
GND
MIXinp
MIXinn
GND
VCCMIX2
NC
NC
GND
48 47 46 45 44 43 42 41 40 39 38 37
1
36
2
35
3
34
4
33
5
32
6
31
TRF371125
7
30
8
29
9
28
10
27
11
26
12
25
13 14 15 16 17 18 19 20 21 22 23 24
VCCBBI
GND
BBIoutn
BBIoutp
GND
LOip
LOin
VCCLO
BBQoutp
BBQoutn
GND
VCCBBQ
To ADC I
LOin
To ADC Q
30 kW
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.
All trademarks are the property of their respective owners.
2
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 © 2010, Texas Instruments Incorporated