DRGND

DGND

AGND

ADC14C105

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SNAS409C – MAY 2007 – REVISED MARCH 2013

Pin Descriptions and Equivalent Circuits (continued)

Pin No.

Symbol

Equivalent Circuit

Description

DIGITAL I/O

The clock input pin.

11

CLK

The analog input is sampled on the rising edge of the clock input.

This is a two-state input controlling Power Down.

30

PD

PD = AGND, Normal operation.

Digital data output pins that make up the 14-bit conversion result. D0

13-19,

D0–D13

(pin 13) is the LSB, while D13 (pin 29) is the MSB of the output

23-29

word. Output levels are CMOS compatible.

Data Ready Strobe. The data output transition is synchronized with

21

DRDY

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

frequency as the CLK input.

ANALOG POWER

Positive analog supply pins. These pins should be connected to a

3, 8, 10

quiet voltage source and be bypassed to AGND with 0.1 µF

capacitors located close to the power pins.

The ground return for the analog supply.

4, 7, 9,

AGND

The exposed pad on back of package must be soldered to ground

Exposed Pad

plane to ensure rated performance.

DIGITAL POWER

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

20

connected to a quiet voltage source and be bypassed to DRGND

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

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

22

DRGND

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

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

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

Copyright © 2007–2013, Texas Instruments Incorporated

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