TDA7515

Block diagram and pin description

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Table 1.

Pin description

Pin No.

Pin Name

Function

1

AMRFAGCin

AM AGC input for RF detection

2

AMRFAGCout

AM AGC output for RF AGC

3

AMPINDR

AM AGC pin-diode driver

4

FMPINDR

FM AGC pin-diode driver

5

FMIN1

FM mixer input 1

6

RFGND

RF ground

7

FMIN2

FM mixer input 2

8

FMAGCTC

FM AGC time constant

9

TV1

Tuning voltage 1 output

10

TV2

Tuning voltage 2 output

11

VCCVCO

Supply voltage VCO

12

GNDVCO

VCO ground

13

VCOB

Base VCO

14

VCOE

Emitter VCO

15

VPLL

PLL supply voltage

16

LPAM/SW

OP AMP input to PLL loop filter AM / switch output (optional)

17

LPOUT

OPAMP output to PLL loop filter

18

LPREF

Voltage reference for PLL

19

LPFM

OP AMP input to PLL loop filter FM

20

LPHC

High current PLL loop filter

21

GNDPLL

PLL ground

22

SCL

Bus connection (IIC clock)

23

SDA

Bus connection (IIC data)

24

IFAMAGCTC

Time constant for AM IF AGC

25

Fref-

Reference frequency input

26

Fref+

Reference frequency input

27

Vref

Reference voltage 5V

28

DAGC

Digital keying AGC input

29

IFGND

IF ground

30

IFOUT2

IF amplifier output

31

IFOUT1

IF amplifier output

32

VCCIF

Supply voltage for IF output

33

IFAGCTC

IF AGC time constant

34

VCC

Supply voltage

35

IFINAM

IF input for narrowband AM

36

GND

Ground

37

IFIN1

IF Input - signal

38

IFIN2

IF Input - blocked

39

MIXOUT1

Mixer output

40

MIXOUT2

Mixer output

41

AMAGCTC

AM AGC time constant

42

FMIFAGCin

IF input for FM AGC

43

AMIN2

AM RF input

44

AMIN1

AM RF input