ADC12010 datasheet(3/22 Pages) NSC

3 / 22 page

Pin Descriptions and Equivalent Circuits

Pin No.

Symbol

Equivalent Circuit

Description

ANALOG I/O

IN+

Non-Inverting analog signal Input. With a 2.0V reference

voltage, the ground-referenced input signal level is 2.0 V

P-P

centered on V

CM.

IN−

Inverting analog signal Input. With a 2.0V reference voltage

the ground-referenced input signal level is 2.0 V

P-P centered

on V

CM. This pin may be connected to VCM for single-ended

operation, but a differential input signal is required for best

performance.

REF

Reference input. This pin should be bypassed to AGND with

a 0.1 µF monolithic capacitor. V

REF is 2.0V nominal and

should be between 1.0V to 2.4V.

These pins are high impedance reference bypass pins.

Connect a 0.1 µF capacitor from each of these pins to AGND.

DO NOT LOAD these pins.

DIGITAL I/O

CLK

Digital clock input. The range of frequencies for this input is

100 kHz to 15 MHz (typical) with guaranteed performance at

10 MHz. The input is sampled on the rising edge of this input.

OE is the output enable pin that, when low, enables the

TRI-STATE® data output pins. When this pin is high, the

outputs are in a high impedance state.

8PD

PD is the Power Down input pin. When high, this input puts

the converter into the power down mode. When this pin is

low, the converter is in the active mode.

ADC12010 Datasheet(PDF) 3 Page - National Semiconductor (TI)