TDA7427 datasheet(1/21 Pages) STMICROELECTRONICS

部件名	TDA7427

功能描述	AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER

PDF	21 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

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TDA7427

AM-FM RADIO FREQUENCY SYNTHESIZER

AND IF COUNTER

ON-CHIP REFERENCE OSCILLATOR AND

PROGRAMMABLE IF COUNTER

VHF INPUT AND PRECOUNTER FOR FRE-

QUENCIES 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 CON-

SUMPTION

HIGH

CURRENT

SOURCE

FOR

0.5ms

LOCK-IN TIME

DIGITAL PORT EXTENSION WITH TWO

OUTPUTS FOR FLEXIBILITY IN APPLICA-

TION

FULLY PROGRAMMABLE BY I

2C BUS

DESCRIPTION

The TDA7427 is a PLL frequency synthesizer

with an additional IF counting system that per-

forms all the functions needed in a complete PLL

radio tuning system for conventional and high

speed RDS tuners. The device has dedicated out-

puts for IN-LOCK detection and Search/Stop sta-

tion.

November 1999

®

SWITCH

AM/FM

PRECOUNTER

:32/33

5 BIT PROG.

CNT

11-21 BIT PROG CNT

SWITCH

SWM/DIR

11 BIT PROG

CNT

INLOCK

DETECTOR

PHASE

COMP

REF

OSCILLATOR

CHARGE

PUMP

-

+

SWITCH

LP1/LP2

14 BIT PROG

CNT

TIMER

CONTROL

I2C BUS

INTERFACE

TEST

LOGIC

PORT EXTENSION

FM_IN

AM_IN

OSCIN

SCL

SDA

IF_AM

IF_FM

VDD2

GNDan/GNDdig

VREF

LPOUT

VDD1

LP_FM

LP_AM

D95AU418B

SWITCH

SWM/DIR

16 BIT PROG

CNT

POWER ON

RESET

DOUT3

VDD1

OSCOUT

SSTOP

LP_HC

DOUT1/INLOCK

16

17

5

6

8

9

19

15

10

11

7

12

18

4

20

1

3

2

13

HFREF

14

BLOCK DIAGRAM

ORDERING NUMBERS: TDA7427(DIP20)

TDA7427D (SO20)

DIP20

SO20

1/21

类似零件编号 - TDA7427

制造商	部件名	数据表	功能描述
STMicroelectronics	TDA7427A	160Kb / 21P	AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER Jul-1998
	TDA7427AAD	160Kb / 21P	AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER Jul-1998
	TDA7427AAD1	160Kb / 21P	AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER Jul-1998

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