DR GND

AGND

ADC14L020

www.ti.com

SNAS325C – JUNE 2005 – REVISED MARCH 2006

Pin No.

Symbol

Equivalent Circuit

Description

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

(pin 12) is the LSB, while D13 (pin 27) is the MSB of the output

word. Output levels are TTL/CMOS compatible. Optimum loading is

< 10pF.

12-19

D0–D13

22-27

ANALOG POWER

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

5, 29

quiet +3.3V source and bypassed to AGND with 0.1 µF capacitors

located close to these power pins, and with a 10 µF capacitor.

4, 7, 28

AGND

The ground return for the analog supply.

DIGITAL POWER

Positive digital supply pin. This pin should be connected to the same

6

capacitor located close to the power pin and with a 10 µF capacitor.

9

DGND

The ground return for the digital supply.

Positive driver supply pin for the ADC14L020's output drivers. This

bypassed to DR GND with a 0.1 µF capacitor. If the supply for this

21

to the supply pin.

The ground return for the digital supply for the ADC's output drivers.

These pins should be connected to the system digital ground, but

20

DR GND

not be connected in close proximity to the ADC's DGND or AGND

pins. See Section 5 (Layout and Grounding) for more details.

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 © 2005–2006, Texas Instruments Incorporated

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5

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