TDA7427 Datasheet, PDF (3/21 Pages) STMicroelectronics – AM-FM RADIO FREQUENCY SYNTHESIZER AND IF COUNTER

TDA7427
PIN DESCRIPTION (TDA7427/D)
PIN
SYMBOL
DESCRIPTION
1
LP_FM Filter OPAMP input, charge pump output (FM mode)
2
LP_HC
Filter OPAMP input, charge pump output (high current
mode)
3
LP_AM Filter OPAMP input, charge pump output (AM mode)
4
VREF
OPAMP reference voltage
5
OSCIN Oscillator reference clock input
6
OSCOUT Oscillator output
7
DOUT3 Open collector output
8
SCL
I²C bus clock input
9
SDA
I²C bus data I/O
10 _{IF_AM IF counter input (AM mode)}
11 IF_FM IF counter input (FM mode)
12 _{SSTOP IF counter result output}
13* DOUT1 Digital output
13* INLOCK Inlock detector output
14 HFREF HF reference
15 VDD1 Positive power supply 5V
16 _{FM_IN High frequency input FM}
17 _{AM_IN High frequency input AM}
18 GND
Analog digital ground
19 _{VDD2 Positive power supply 10V}
20 LPOUT Filter input, change pump output
* Pin function is userdefined by software
INPUT/OUT PUT
Input
Input/output
Analog input
Analog input
Output
Push-pull output
Output
Supply
Analog input
Analog input
Supply
Supply
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