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ADR512

1.2 V Precision Low Noise

Shunt Voltage Reference

FEATURES

Precision 1.200 V Voltage Reference

Ultracompact 3 mm

3 mm SOT-23 Package

No External Capacitor Required

Low Output Noise: 4

V p-p (0.1 Hz to 10 Hz)

Initial Accuracy:

0.3% Max

Temperature Coefficient: 60 ppm/ C Max

Operating Current Range: 100

A to 10 mA

Output Impedance: 0.3

Max

Temperature Range: –40 C to +85 C

APPLICATIONS

Precision Data Acquisition Systems

Battery-Powered Equipment:

Cellular Phone, Notebook Computer, PDA,

and GPS

3 V/5 V, 8-/12-Bit Data Converters

Portable Medical Instruments

Industrial Process Control Systems

Precision Instruments

GENERAL DESCRIPTION

Designed for space critical applications, the ADR512 is a low

voltage (1.200 V), precision shunt-mode voltage reference in the

ultracompact (3 mm

3 mm) SOT-23 package. The ADR512

features low temperature drift (60 ppm/ C), high accuracy

( 0.30%), and ultralow noise (4 V p-p) performance.

The ADR512’s advanced design eliminates the need for an

external capacitor, yet it is stable with any capacitive load. The

minimum operating current increases from a scant 100 A to a

maximum of 10 mA. This low operating current and ease of use

make the ADR512 ideally suited for handheld battery-powered

applications.

PIN CONFIGURATION

3-Lead SOT-23

1

3

2

ADR512

TRIM/NC

A TRIM terminal is available on the ADR512 to provide adjust-

ment of the output voltage over

0.5% without affecting the

temperature coefficient of the device. This feature provides

users with the flexibility to trim out any system errors.

(OPTIONAL)

ADR512

Figure 1. Typical Operating Circuit

ADR512

Output

Initial

Temperature

Voltage

Accuracy

Coefficient

Model

(mV)

(%)

(ppm/ C)

ADR512ART-REEL7 1.200

3.5

0.3

60