AD7482

Rev. B | Page 8 of 20

Pin No.

Mnemonic

Description

30, 31

DGND

Ground Reference for Digital Circuitry.

32

Logic Power Supply Input. The voltage supplied at this pin determines at what voltage the interface logic of

the device operates.

40

D12

Data Output Bit for Overranging. If the overrange feature is not used, this pin should be pulled to DGND via a

100 kΩ resistor.

41

CONVST

Convert Start Logic Input. A conversion is initiated on the falling edge of the CONVST signal. The input track-

and-hold amplifier goes from track mode to hold mode, and the conversion process commences.

42

RESET

Reset Logic Input. An active low reset pulse must be applied to this pin after power-up to ensure correct

operation. A falling edge on this pin resets the internal state machine and terminates a conversion that

may be in progress. The contents of the offset register are also cleared on this edge. Holding this pin low

keeps the part in a reset state.

43

MODE2

Operating Mode Logic Input. See Table 8 for details.

44

MODE1

Operating Mode Logic Input. See Table 8 for details.

45

CLIP

Logic Input. A logic high on this pin enables output clipping. In this mode, any input voltage that is greater

than positive full scale or less than negative full scale is clipped to all 1s or all 0s, respectively. Further details

are given in the Offset/Overrange section.