REV. B

AD7910/AD7920

–7–

PIN FUNCTION DESCRIPTIONS

Mnemonic

Function

CS

Chip Select. Active low logic input. This input provides the dual function of initiating conversions on the AD7910/

AD7920 and framing the serial data transfer.

GND

Analog Ground. Ground reference point for all circuitry on the AD7910/AD7920. All analog input signals should be

referred to this GND voltage.

SDATA

Data Out. Logic output. The conversion result from the AD7910/AD7920 is provided on this output as a serial data

stream. The bits are clocked out on the falling edge of the SCLK input. The data stream from the AD7920 consists

of four leading zeros followed by the 12 bits of conversion data, which is provided MSB first. The data stream from

the AD7910 consists of four leading zeros followed by the 10 bits of conversion data followed by two trailing zeros,

which is also provided MSB first.

SCLK

Serial Clock. Logic input. SCLK provides the serial clock for accessing data from the part. This clock input is also

used as the clock source for the AD7910/AD7920 conversion process.

NC

No Connect

PIN CONFIGURATIONS

6-Lead SC70

TOP VIEW

(Not to Scale)

6

5

4

1

2

3

GND

CS

SDATA

SCLK

AD7910/

AD7920

8-Lead MSOP

8

7

6

5

1

2

3

4

SDATA

CS

GND

SCLK

NC

NC

TOP VIEW

(Not to Scale)

AD7910/

AD7920

NC = NO CONNECT