TRF1216_07 Datasheet, PDF (1/13 Pages) Texas Instruments – 3.5-GHz, HIGH DYNAMIC RANGE, LOW-NOISE DOWN-CONVERTER

TRF1216
www.ti.com
SLWS172A – APRIL 2005 – REVISED DECEMBER 2005
3.5-GHz, HIGH DYNAMIC RANGE, LOW-NOISE DOWN-CONVERTER
FEATURES
• Performs First Down-Conversion in 3.5-GHz
Radios (3300–3800 MHz)
• Integrated LNA/Mixer/IF Amp/LO Buffer
• Provision for External Image
Reject/Band-Pass Filter
• Low Noise-Figure/High Linearity
• Digital 10-dB Attenuator for High-Level
Signals
• Frequency Range: 3.3–3.8 GHz
• 28 dB of Gain with 20 dB of Gain Control
(10-dB Fixed)
• 2.5-dB Noise Figure, Typical
• LO Drive Level = 0 dBm, Typical
DEVICE INFORMATION
RGP PACKAGE
(TOP VIEW)
20 19 18 17 16
LNAO 1
VDDA 2
GND 3
GND 4
LNAI 5
15 RFAGC
14 IFOP
13 IFON
12 VDDIF
11 IFB
6 7 8 9 10
P0031-02
DESCRIPTION
The TRF1216 is the first of two integrated circuits used in the receiver section of Texas Instruments’ 3.5-GHz
radio chipset. The TRF1216 down-converts the 3.5-GHz input frequency to an intermediate frequency in the
range of 400 MHz to 500 MHz. The device provides a differential output that passes through a SAW filter before
connecting to a second down converter. For the best performance, Texas Instruments TRF1212 should be used
to perform both the second down conversion and also provide the local oscillator for the TRF1216.
The TRF1216 includes a LNA with switchable attenuation, a balanced mixer, a variable gain IF amplifier and a
differential LO Buffer for improved performance. In order to provide exceptional image rejection and extra jammer
immunity, the TRF1216 offers a signal path to an off-chip filter. Specifications are provided assuming an in-band
2-dB insertion loss filter. To maximize input dynamic range, a 10-dB switchable attenuator is provided in the RF
path as well as 10 dB of analog IF gain control. After the image reject filter, an on-chip Balun converts the signal
from single ended to differential in order to provide better noise immunity at the mixer.
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