Details, datasheet, quote on part number: TDA7427D
PartTDA7427D
CategoryAutomotive
DescriptionAm-fm Radio Frequency Synthesizer And if Counter
CompanyST Microelectronics, Inc.
DatasheetDownload TDA7427D datasheet
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Features, Applications

ON-CHIP REFERENCE OSCILLATOR AND PROGRAMMABLE IF COUNTER VHF INPUT AND PRECOUNTER FOR FREQUENCIES TO 290MHz (SUITABLE FOR DAB APPLICATION) HF INPUT FOR FREQUENCIES 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 is a PLL frequency synthesizer BLOCK DIAGRAM

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

15 14 BIT PROG CNT TIMER CONTROL TEST LOGIC POWER ON RESET

Symbol VDD1 VDD2 Ptot Tstg Tamb Supply Voltage Supply Voltage Total Power Dissipation Storage Temperature Ambient Temperature Parameter Value + 85 Unit V mW

LP_FM LP_HC LP_AM VREF OSCIN OSCOUT DOUT3 SCL SDA IF_AM
LPOUT VDD2 GND AM_IN FM_IN VDD1 HFREF DOUT1/INLOCK SSTOP IF_FM
Symbol Rth j-amb Parameter Thermal Resistance Junction-Ambient max SO20 150 Unit

Filter OPAMP input, charge pump output (FM mode) Filter OPAMP input, charge pump output (high current LP_HC mode) LP_AM Filter OPAMP input, charge pump output (AM mode) VREF OPAMP reference voltage OSCIN Oscillator reference clock input OSCOUT Oscillator output DOUT3 Open collector output SCL I2C bus clock input SDA I2C bus data I/O IF_AM IF counter input (AM mode) IF_FM IF counter input (FM mode) SSTOP IF counter result output DOUT1 Digital output INLOCK Inlock detector output HFREF HF reference VDD1 Positive power supply 5V FM_IN High frequency input FM AM_IN High frequency input AM GND Analog digital ground VDD2 Positive power supply 10V LPOUT Filter input, change pump output

Input Input/output Analog input Analog input Output Push-pull output Output Supply Analog input Analog input Supply


 

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