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TDA7427

ST Microelectronics
Part Number TDA7427
Manufacturer ST Microelectronics
Description AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER
Published Apr 16, 2005
Detailed Description ® TDA7427 AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER ON-CHIP REFERENCE OSCILLATOR AND PROGRAMMABLE IF COUNTER VH...
Datasheet PDF File TDA7427 PDF File

TDA7427
TDA7427

Overview
® TDA7427 AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER ON-CHIP REFERENCE OSCILLATOR AND PROGRAMMABLE IF COUNTER VHF INPUT AND PRECOUNTER FOR FREQUENCIES UP TO 290MHz (SUITABLE FOR DAB APPLICATION) HF INPUT FOR FREQUENCIES UP TO 64MHz (SHORT WAVE BAND) IN-LOCK DETECTOR FOR SEARCH/STOP STATION FUNCTION STAND-BY MODE FOR LOW POWER CONSUMPTION HIGH CURRENT SOURCE FOR 0.
5ms LOCK-IN TIME DIGITAL PORT EXTENSION WITH TWO OUTPUTS FOR FLEXIBILITY IN APPLICATION FULLY PROGRAMMABLE BY I2C BUS DESCRIPTION The TDA7427 is a PLL frequency synthesizer BLOCK DIAGRAM DIP20 SO20 ORDERING NUMBERS: TDA7427(DIP20) TDA7427D (SO20) with an additional IF counting system that performs all the functions needed in a complete PLL radio tuning system for conventional and high speed RDS tuners.
The device has dedicated outputs for IN-LOCK detection and Search/Stop station.
13 FM_IN 16 SWITCH AM/FM HFREF 14 SWITCH SWM/DIR SWITCH SWM/DIR PHASE COMP CHARGE PUMP + VDD1 20 PRECOUNTER :32/33 5 BIT PROG.
CNT INLOCK DETECTOR 2 3 SWITCH LP1/LP2 1 DOUT1/INLOCK LP_HC LP_AM LP_FM AM_IN 17 LPOUT 11 BIT PROG CNT OSCIN OSCOUT 5 6 REF OSCILLATOR 16 BIT PROG CNT 4 VREF SCL SDA 8 9 I2C BUS INTERFACE 18 GNDan/GNDdig VDD2 VDD1 19 15 14 BIT PROG CNT TIMER CONTROL TEST LOGIC POWER ON RESET IF_AM 10 11-21 BIT PROG CNT PORT EXTENSION IF_FM 11 12 D95AU418B 7 DOUT3 SSTOP November 1999 1/21 TDA7427 ABSOLUTE MAXIMUM RATINGS Symbol VDD1 VDD2 Ptot Tstg Tamb Supply Voltage Supply Voltage Total Power Dissipation Storage Temperature Ambient Temperature Parameter Value - 0.
3 to + 7 - 0.
3 to + 11 300 - 55 to + 150 -40 to + 85 Unit V V mW o o C C PIN CONNECTION LP_FM LP_HC LP_AM VREF OSCIN OSCOUT DOUT3 SCL SDA IF_AM 1 2 3 4 5 6 7 8 9 10 D95AU373B 20 19 18 17 16 15 14 13 12 11 LPOUT VDD2 GND AM_IN FM_IN VDD1 HFREF DOUT1/INLOCK SSTOP IF_FM THERMAL DATA Symbol Rth j-amb Parameter Thermal Resistance Junction-Ambient max DIP20 100 SO20 150 Unit o C/W 2/21 TDA7427 PIN DESCRIPTION (TDA7427/D) PI...


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