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TDA7427A Datasheet

AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER

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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 I2C BUS
DESCRIPTION
The TDA7427A is a PLL frequency synthesizer
TSSOP28
SO28
ORDERING NUMBERS: TDA7427AAD (TSSOP28)
TDA7427AAD1 (SO28)
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.
BLOCK DIAGRAM
24
FM_IN
19
HFREF
25
AM_IN
SWITCH
AM/FM
PRECOUNTER
:32/33
SWITCH
SWM/DIR
5 BIT PROG.
COUNTER
SWITCH
SWM/DIR
OSCIN
OSCOUT
9
10
REF
OSCILLATOR
ADDR
SCL
SDA
20
12 I2C BUS
13 INTERFACE
VDD2
VDD1
GNDDIG
IF_AM
IF_FM
27
SUPPLY
21 &
POWER-ON
22 RESET
14 BIT PROG
COUNTER
14
SWITCH
15 AM/FM
16 BIT PROG
COUNTER
11 BIT PROG
COUNTER
TIMER
CONTROL
11-21 BIT PROG COUNTER
D95AU372D
INLOCK
DETECTOR
PHASE
COMP
CHARGE
PUMP
SWITCH
OUT
SWITCH
LP1/LP2
17
2
3
1
DOUT1/INLOCK
LP_HC
LP_AM
LP_FM
- 28
LP_OUT
+
VDD1
4
VREF
26
GNDAN
TEST
LOGIC
PORT EXTENSION
16
SSTOP
18 5 6 7 8
DOUT2 DOUT3 DOUT4 DOUT5 DOUT6
July 1998
1/21


STMicroelectronics Electronic Components Datasheet

TDA7427A Datasheet

AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER

No Preview Available !

TDA7427A
ABSOLUTE MAXIMUM RATINGS
Symbol
VDD1
VDD2
Ptot
Tstg
Tamb
Parameter
Supply Voltage
Supply Voltage
Total Power Dissipation
Storage Temperature
Ambient Temperature
Value
- 0.3 to + 7
- 0.3 to + 11
300
- 55 to + 150
-40 to + 85
Unit
V
V
mW
oC
oC
PIN CONNECTION
LP_FM
LP_HC
LP_AM
VREF
DOUT3
DOUT4
DOUT5
DOUT6
OSCIN
OSCOUT
N.C.
SCL
SDA
IF_AM
1 28
2 27
3 26
4 25
5 24
6 23
7 22
8 21
9 20
10 19
11 18
12 17
13 16
14 15
D95AU374C
LPOUT
VDD2
GND-AN
AM_IN
FM_IN
N.C.
GND-DIG
VDD1
ADDR
HFREF
DOUT2
DOUT1/INLOCK
SSTOP
IF_FM
THERMAL DATA
Symbol
Rth j-amb
Parameter
Thermal Resistance Junction-Ambient
TSSOP28
160
SO 28
65
Unit
oC/W
2/21


Part Number TDA7427A
Description AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER
Maker ST Microelectronics
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TDA7427A Datasheet PDF






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1 TDA7427 AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER
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