AD7606/AD7606-6/AD7606-4

Data Sheet

Rev. D | Page 16 of 36

Pin No.

Mnemonic

Description

AD7606

AD7606-6

AD7606-4

42

REF

REFIN/

REFOUT

REFIN/

REFOUT

REFIN/

REFOUT

Reference Input (REFIN)/Reference Output (REFOUT). The on-chip reference

of 2.5 V is available on this pin for external use if the REF SELECT pin is set to

logic high. Alternatively, the internal reference can be disabled by setting

applied to this input (see the Internal/External Reference section).

Decoupling is required on this pin for both the internal and external

reference options. A 10 μF capacitor should be applied from this pin to

ground close to the REFGND pins.

43, 46

REF

REFGND

REFGND

REFGND

Reference Ground Pins. These pins should be connected to AGND.

44, 45

REF

REFCAPA,

REFCAPB

REFCAPA,

REFCAPB

REFCAPA,

REFCAPB

Reference Buffer Output Force/Sense Pins. These pins must be connected

together and decoupled to AGND using a low ESR, 10 μF ceramic capacitor.

The voltage on these pins is typically 4.5 V.

49

AI

V1

V1

V1

Analog Input. This pin is a single-ended analog input. The analog input

range of this channel is determined by the RANGE pin.

50, 52

AI GND

V1GND,

V2GND

V1GND,

V2GND

V1GND,

V2GND

Analog Input Ground Pins. These pins correspond to Analog Input Pin V1

and Analog Input Pin V2. All analog input AGND pins should connect to

the AGND plane of a system.

51

AI

V2

V2

V2

Analog Input. This pin is a single-ended analog input. The analog input

range of this channel is determined by the RANGE pin.

53

AI/GND

V3

V3

AGND

Analog Input 3. For the AD7606-4, this is an AGND pin.

54

AI GND/

GND

V3GND

V3GND

AGND

Analog Input Ground Pin. For the AD7606-4, this is an AGND pin.

55

AI/GND

V4

AGND

AGND

Analog Input 4. For the AD7606-6 and the AD7606-4, this is an AGND pin.

56

AI GND/

GND

V4GND

AGND

AGND

Analog Input Ground Pin. For the AD7606-6 and AD7606-4, this is an

AGND pin.

57

AI

V5

V4

V3

Analog Inputs. These pins are single-ended analog inputs. The analog

input range of these channels is determined by the RANGE pin.

58

AI GND

V5GND

V4GND

V3GND

Analog Input Ground Pins. All analog input AGND pins should connect to

the AGND plane of a system.

59

AI

V6

V5

V4

Analog Inputs. These pins are single-ended analog inputs.

60

AI GND

V6GND

V5GND

V4GND

Analog Input Ground Pins. All analog input AGND pins should connect to

the AGND plane of a system.

61

AI/GND

V7

V6

AGND

Analog Input Pins. For the AD7606-4, this is an AGND pin.

62

AI GND/

GND

V7GND

V6GND

AGND

Analog Input Ground Pins. For the AD7606-4, this is an AGND pin.

63

AI/GND

V8

AGND

AGND

Analog Input Pin. For the AD7606-4 and AD7606-6, this is an AGND pin.

64

AI GND/

GND

V8GND

AGND

AGND

Analog Input Ground Pin. For the AD7606-4 and AD7606-6, this is an

AGND pin.

1

P is power supply, DI is digital input, DO is digital output, REF is reference input/output, AI is analog input, GND is ground.