TRF1216 www.ti.com SLWS172 – APRIL 2005 3.5-GHz, High Dynamic Range, Low-Noise Down-Converter FEATURES MXRI RFATTN GND 17 16 RFAGC VDDA 2 14 IFOP GND 3 13 IFON GND 4 12 VDDIF LNAI 5 11 IFB 6 7 8 9 10 VDDLO 15 GND 1 Figure 1. TRF1216 Pin Out VDD1 VDD2 Dual Stage− LNA VDDIF LNAO MXRI Mixer VGA IFOP IFON BALUN LNAI IFB RFAGC LOP LON LO Buffer RFATTN GND VDDLO Figure 2. 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 formative 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 PRODUCT PREVIEW 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 10dB 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. 19 18 LNAO 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. 20 LON • • • GND • • LOP • • LPCC−20 PACKAGE (TOP VIEW) VDD2 • • DEVICE INFORMATION 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 Switched 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 Switched) 2-dB Noise Figure, Typical Input Third Order Intercept of +5 dBm at 3.8 GHz LO Drive Level = 0 dBm, Typical GND • IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. 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