Details, datasheet, quote on part number: TDA7427AAD
PartTDA7427AAD
CategoryCommunication => Wireless => Frequency Synthesizers
DescriptionAm-fm Radio Frequency Synthesizer And if Counter
CompanyST Microelectronics, Inc.
DatasheetDownload TDA7427AAD datasheet
  

 

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 SIX 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.

SWITCH OUT FM_IN 24 PRECOUNTER :32/33 HFREF 19 SWITCH AM/FM SWITCH SWM/DIR SWITCH SWM/DIR PHASE COMP CHARGE PUMP VDD1 5 BIT PROG. COUNTER INLOCK DETECTOR

11 BIT PROG COUNTER OSCIN OSCOUT 9 10 REF OSCILLATOR 16 BIT PROG COUNTER

SWITCH AM/FM 11-21 BIT PROG COUNTER PORT EXTENSION SUPPLY & POWER-ON RESET 14 BIT PROG COUNTER TIMER CONTROL TEST LOGIC

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 DOUT5 DOUT6 OSCIN OSCOUT N.C. SCL SDA IF_AM
LPOUT VDD2 GND-AN AM_IN FM_IN N.C. GND-DIG VDD1 ADDR HFREF DOUT2 DOUT1/INLOCK SSTOP IF_FM
Symbol Rth j-amb Parameter Thermal Resistance Junction-Ambient 28 65 Unit

LP_FM LP_HC LP_AM VREF DOUT5 DOUT6 OSCIN OSCOUT N.C. SCL SDA IF_AM IF_FM SSTOP DOUT1 INLOCK DOUT2 HF-REF ADDR VDD1 GND-DIG N.C. FM_IN AM_IN GND-AN VDD2 LP_OUT

Filter OPAMP input, charge pump output (FM mode) Filter OPAMP input, charge pump output (high current mode) Filter OPAMP input, charge pump output (AM mode) OPAMP reference voltage Digital Output 3 (open collector) Digital Output 4 (open collector) Digital Output 5 (open collector) Digital Output 6 (open collector) Reference Oscillator Input Reference Oscillator Output Not connected I 2C bus clock input I 2C bus data I/O IF counter HF input IF counter VHF input IF counter result output Digital output 1 (push-pull) Inlock detector output Digital Output 2 (open collector) HF reference pin I 2C bus address pin Supply Voltage Digital ground Not connected High frequency input FM High frequency input AM Analog ground Supply Voltage Filter OPAMP output

* Pin function is selectable by software (see software specification)

 

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