Pin No.

Symbol

Equivalent Circuit

Description

13-19,

23-29

D0–D13

Digital data output pins that make up the 14-bit conversion

result. D0 (pin 13) is the LSB, while D13 (pin 29) is the MSB of

the output word. Output levels are CMOS compatible.

21

DRDY

Data Ready Strobe. The data output transition is synchronized

with the falling edge of this signal. This signal switches at the

same frequency as the CLK input.

ANALOG POWER

3, 8, 10,

V

A

Positive analog supply pins. These pins should be connected

to a quiet voltage source and be bypassed to AGND with 0.1

µF capacitors located close to the power pins.

4, 7, 9,

Exposed

Pad

AGND

The ground return for the analog supply.

DIGITAL POWER

20

V

DR

Positive driver supply pin for the output drivers. This pin should

be connected to a quiet voltage source and be bypassed to

DRGND with a 0.1 µF capacitor located close to the power pin.

22

DRGND

The ground return for the digital output driver supply. This pins

should be connected to the system digital ground, but not be

connected in close proximity to the ADC’s AGND pins.

www.national.com

4