AD7683

Rev. A | Page 7 of 16

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

VDD

8

DCLOCK

7

6

CS

AD7683

5

TOP VIEW

(Not to Scale)

Figure 6. 8-Lead MSOP and QFN (LFCSP) Pin Configuration

Table 8. 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. Decouple the

REF pin closely to the GND pin with a ceramic capacitor of a few μF.

2

+IN

AI

Analog Input. It is referred to Pin –IN. The voltage range, that is, the difference between +IN and –IN, is 0 V

3

–IN

AI

Analog Input Ground Sense. Connect this pin to either the analog ground plane or a remote sense

ground.

4

GND

P

Power Supply Ground.

5

CS

DI

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

6

DO

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

7

DCLOCK

DI

Serial Data Clock Input.

8

VDD

P

Power Supply.