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參數(shù)資料
| 型號： | TDA7427D |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | 通用總線功能 |
| 英文描述： | AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER |
| 中文描述： | 上午- FM收音機(jī)頻率合成器和中頻計數(shù)器 |
| 文件頁數(shù)： | 1/21頁 |
| 文件大小： | 144K |
| 代理商： | TDA7427D |
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
64MHz (SHORT WAVE BAND)
IN-LOCK DETECTOR FOR SEARCH/STOP
STATIONFUNCTION
STAND-BY MODE FOR LOW POWER CON-
SUMPTION
HIGH
CURRENT
SOURCE
LOCK-INTIME
DIGITAL PORT EXTENSION WITH TWO
OUTPUTS FOR FLEXIBILITY IN APPLICA-
TION
FULLY PROGRAMMABLEBY I
2
C BUS
TO
FOR
0.5ms
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
speedRDS tuners.The device has dedicatedout-
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
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