AD7684

Rev. 0 | Page 7 of 16

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

REF

1

+IN

2

–IN

3

GND

4

VDD

8

DCLOCK

7

6

CS

5

AD7684

TOP VIEW

(Not to Scale)

Figure 6. 8-Lead MSOP Pin Configuration

Table 7. Pin Function Descriptions

Pin No.

Mnemonic

Type1

Function

1

REF

AI

Reference Input Voltage. The REF range is from 0.5 V to VDD. It is referred to the GND pin. This pin should

be decoupled closely to the pin with a ceramic capacitor of a few µF.

2

+IN

AI

Differential Positive Analog Input.

3

–IN

AI

Differential Negative Analog Input.

4

GND

P

Power Supply Ground.

5

CS

DI

Chip Select Input. On its falling edge, it initiates the conversions. The part returns in shutdown mode as

6

DO

Serial Data Output. The conversion result is output on this pin. It is synchronized to SCK.

7

DCLOCK

DI

Serial Data Clock Input.

8

VDD

P

Power Supply.