TDA7521

8/11

Notes: 1. Current or Voltage input, DC coupled

2. Precision Resistor connected between Rext and ground

3. These pins are to be left unconnected

4. Internally generated, need external filter ing cap

5. Buffered Vcc/2 Output

6. Driven by IC6D, active high

7. Dirven by IC6D, active low

8. 1 Vrms max., VCC/2 DC component

9. Needs RC-C externals network

10.High in correspondence of the HF sample preceding the AC one

11.LSB+1 of the HF ADC, Underflow bit of the servo one

12.LSB of the HF ADC, Overflow bit of the servo one

13.Can be selected among HF, AC, BD, E, F (via control interface)

14.Bidirectional, needs a pull-up resistor to 5 V line

15.Drives an external pnp.

24

BSR

I

Digital Bit Stream input, Right Channel

25

SYNC

O

ADC Mux Sync output (10)

26

D7

O

ADC output [MSB]

27

D6

O

ADC output

28

D5

O

ADC output

29

D4

O

ADC output

30

D3

O

ADC output

31

D2

O

ADC output

32

D1/UF

O

(11)

33

D0/OF

O

(12)

34

GND_ADC

Gnd

ADC Ground

35

VDD_ADC

Vdd

ADC 5V Supply

36

GND_ADC

Gnd

ADC Ground

37

VCC_ADC

Vdd

ADC 5V Supply

38

SCK

I

ST7 Control I/F Clock input

39

SDA

I/O

ST7 Control I/F Data (14)

40

HFMON

O

HF output (13)

41

LD

O

Laser Control output (15)

42

MD

I

Monitor diode input

43

VSS_PRE

Gnd

Pre_AMP Ground

44

VCC_PRE

Vdd

Pre_AMP 5V Supply

Pin Number

Name

Pin

Description