Datasheet

AD7694
Rev. A | Page 7 of 16
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
05003-004
REF
1
IN+
2
IN– 3
GND 4
VDD
8
SCK
7
SDO6
CNV5
AD7694
TOP VIEW
(Not to Scale)
Figure 4. 8-Lead MSOP Pin Configuration
Table 7. Pin Function Descriptions
Pin No. Mnemonic Type
1
Function
1 REF AI
Reference Input Voltage. The REF range is from 1 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
Analog Input. It is referred to in IN−. The voltage range, that is, the difference between IN+ and IN−, which
is 0 V to V
REF
.
3 IN− AI Analog Input Ground Sense. To be connected to the analog ground plane or to a remote sense ground.
4 GND P Power Supply Ground.
5 CNV DI Convert Input. On its leading edge, it initiates the conversions. It enables the SDO pin when low.
6 SDO DO Serial Data Output. The conversion result is output on this pin. It is synchronized to SCK.
7 SCK DI Serial Data Clock Input. When CNV is low, the conversion result is shifted out by this clock.
8 VDD P Power Supply.
1
AI = analog input; DI = digital input; DO = digital output; and P = power.