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TDA7427A 데이터시트(Datasheet) 1 Page - STMicroelectronics

부품명 TDA7427A
상세내용  AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER
PDF  21 Pages
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제조사  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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TDA7427A
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 SIX OUT-
PUTS FOR FLEXIBILITY IN APPLICATION
FULLY PROGRAMMABLE BY I
2C BUS
DESCRIPTION
The TDA7427A 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.
July 1998
®
SWITCH
AM/FM
PRECOUNTER
:32/33
5 BIT PROG.
COUNTER
11-21 BIT PROG COUNTER
SWITCH
SWM/DIR
11 BIT PROG
COUNTER
INLOCK
DETECTOR
PHASE
COMP
REF
OSCILLATOR
CHARGE
PUMP
-
+
SWITCH
LP1/LP2
14 BIT PROG
COUNTER
TIMER
CONTROL
I2C BUS
INTERFACE
TEST
LOGIC
PORT EXTENSION
FM_IN
AM_IN
OSCIN
ADDR
SCL
SDA
IF_AM
IF_FM
DOUT2
DOUT3
DOUT4
DOUT5
DOUT6
VDD2
GNDAN
VREF
LP_OUT
VDD1
LP_FM
LP_AM
D95AU372D
SWITCH
SWM/DIR
16 BIT PROG
COUNTER
VDD1
OSCOUT
SSTOP
GNDDIG
LP_HC
DOUT1/INLOCK
24
25
9
10
20
12
13
27
21
22
14
15
16
18
5678
26
4
28
1
3
2
17
HFREF
19
SUPPLY
&
POWER-ON
RESET
SWITCH
AM/FM
SWITCH
OUT
BLOCK DIAGRAM
ORDERING NUMBERS: TDA7427AAD (TSSOP28)
TDA7427AAD1 (SO28)
TSSOP28
SO28
1/21




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데이터시트



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