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| TDA7701 BATTERY-OPERATED FULLY INTEGRATED FM TUNER DATA BRIEF 1 Main Features SINGLE-CHIP FM TUNER FOR LOW-VOLTAGE/ LOW POWER APPLICATIONS INTEGRATED LNA (WITH AGC) AND IMAGE REJECTION MIXER LOW-IF ARCHITECTURE WITH ON-CHIP CHANNEL SELECTION FILTER VCO WITH ON-CHIP VARACTOR INTEGRATED TUNING PLL WITH AUTO STATION SEARCH FUNCTION ANALOG AND DIGITAL SIGNAL STRENGTH INDICATION FULLY INTEGRATED FM DEMODULATOR AND ADJUSTMENT-FREE STEREO DECODER PROGRAMMABLE AUTOMATIC STEREO BLEND AND SOFT MUTE I2C/SPI-BUS CONTROLLED LOW POWER CONSUMPTION HIGH SENSITIVITY HIGH AUDIO QUALITY Figure 1. Package TFBGA40 Table 1. Order Codes Part Number TDA7701 Package TFBGA40 decoding, I2C/SPI-controlled tuning with station detection. Its low-IF architecture highly integrated RF/IF sections include a low-noise preamplifier with Automatic Gain Control, an image rejection mixer and on-chip high-Q channel selection filters that bring to a minimum the external component count and PCB complexity while guaranteeing good selectivity and image-rejection performances Thanks to its on-chip varactor, the tuning-PLL controlled VCO needs just one external inductor for low phasenoise oscillation. FM demodulation is performed by means of a fully integrated circuit that eliminates the need for an external LC tank while maximizing linearity. The FM stereo signal is decoded through a fullyintegrated, adjustment-free dedicated PLL; automatic signal-dependent stereo blend and softmute functions are provided. A single external reference frequency is needed for IC operation, and can be selected among those commonly used in GSM applications (13/19.2/26/ 38.4 MHz + 32768Hz real-time/sleep clock). 2 Description TDA7701 is a single-chip FM Tuner specifically designed in mixed Bipolar-CMOS technology for low-voltage/low-power applications, where the minimization of external component count and PCB size and complexity are mandatory: typical examples are mobile phones and portable multimedia equipment. Housed in a small TFBGA40 package (5x5 mm), it features the full FM signal processing chain from antenna to stereo audio output: RF front-end processing, IF processing, demodulation and stereo February 2005 This is preliminary information on a new product now in development. Details are subject to change without notice. Rev. 1 1/4 2/4 TDA7701 - AGCTC MPX RSSI MPXSMSTDECIN RFVCC DEMREF TUNVCC RFGND AGC OUT L OUT R RFIN+ FM Demodulator Channel Selection Filter Limiter /4 Soft Mute IR Mixer Stereo Decoder & Blend Figure 2. Functional Block Diagram RFIN- Variable Gain LNA VCOVCC 38 kHz INTX SWPORT VCO RESET Pilot Recovery VCOGND VCOIN VCOOUT LF LFREF Tuning PLL I2C/SPI Bus I/F /N DIGVCC DIGGND PLLVCC PLLGND CKIN CLOCK DATA DATAOUT CS BUSEN VREF BUSGND VREFINT TDA7701 Table 2. Revision History Date February 2005 Revision 1 First Issue Description of Changes 3/4 TDA7701 - Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners (c) 2005 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 4/4 |
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