REV. 0

AD13280

–5–

PIN FUNCTION DESCRIPTIONS

Pin No.

Name

Function

1, 35

SHIELD

Internal Ground Shield between Channels

2, 3, 9, 10, 13, 16

AGNDA

A Channel Analog Ground. A and B grounds should be connected as close to

the device as possible.

4

A–IN

Inverting Differential Input (Gain = 1).

5

A+IN

Noninverting Differential Input (Gain = 1).

6

AMP-OUT-A

Single-Ended Amplifier Output (Gain = 2).

7

AMP-IN-A-1

Analog Input for A Side ADC (Nominally

±0.5 V).

8

AMP-IN-A-2

Analog Input for A Side ADC (Nominally

±1.0 V).

11

A Channel Analog Negative Supply Voltage (Nominally –5.0 V or –5.2 V).

12

A Channel Analog Positive Supply Voltage (Nominally 5.0 V).

14

ENCODEA

Complement of Encode; Differential Input.

15

ENCODEA

Encode Input; Conversion Initiated on Rising Edge.

17

A Channel Digital Positive Supply Voltage (Nominally 5.0 V/ 3.3 V).

18, 19, 37, 38

NC

No Connect.

20–25, 28–33

D0A–D11A

Digital Outputs for ADC A. D0 (LSB).

26, 27

DGNDA

A Channel Digital Ground.

34

DROUTA

Data Ready A Output.

36

DROUTB

Data Ready B Output.

39–42, 45–52

D0B–D11B

Digital Outputs for ADC B. D0 (LSB).

43, 44

DGNDB

B Channel Digital Ground.

53

B Channel Digital Positive Supply Voltage (Nominally 5.0 V/ 3.3 V).

54, 57, 60, 61, 67, 68

AGNDB

B Channel Analog Ground. A and B grounds should be connected as close to the

device as possible.

55

ENCODEB

Encode Input; Conversion Initiated on Rising Edge.

56

ENCODEB

Complement of Encode; Differential Input.

58

B Channel Analog Positive Supply Voltage (Nominally 5.0 V).

59

B Channel Analog Negative Supply Voltage (Nominally –5.0 V or –5.2 V).

62

AMP-IN-B-2

Analog Input for B Side ADC (Nominally

±1.0 V).

63

AMP-IN-B-1

Analog Input for B Side ADC (Nominally

±0.5 V).

64

AMP-OUT-B

Single-Ended Amplifier Output (Gain = 2).

65

B+IN

Noninverting Differential Input (Gain = 1).

66

B–IN

Inverting Differential Input (Gain = 1).