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Ultra Low Noise, Precision Voltage Reference

ISL21090

The ISL21090 is a ultra low noise, high DC accuracy precision

voltage reference with wide input voltage range. The ISL21090

uses the new Intersil Advanced Bipolar technology to achieve

voltage accuracy of 0.02% (2.5V option).

The ISL21090 offers 1.25V, 2.5V, and 5.0V output voltage

options with 7ppm/°C temperature coefficient and also

provides excellent line and load regulation. These devices are

offered in an 8 Ld SOIC package.

The ISL21090 is ideal for high-end instrumentation, data

acquisition and processing applications requiring high DC

precision where low noise performance is critical.

Applications

•High-End Instrumentation

• Precision Voltage Sources for Data Acquisition System,

Industrial Control, Communication Infrastructure

• Process Control and Instrumentations

• Active Source for Sensors

Features

• Reference Output Voltage Option

- 1.25V, 2.5V, and 5.0V (Released)

- 7.5V (Coming Soon)

• Initial Accuracy:

- ISL21090-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±0.03%

- ISL21090-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±0.02%

- ISL21090-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±0.025%

(1.25V Option)

• Supply Current . . . . . . . . . . . . . . . . . . . .750µA (1.25V Option)

• Temperature Coefficient . . . . . . . . . . . . . . . . . . 7ppm/°C Max

• Output Current Capability . . . . . . . . . . . . . . . . . . . . . . . . 20mA

• Line Regulation . . . . . . . . . . . . . . . . . 6ppm/V (1.25V Option)

• Load Regulation . . . . . . . . . . . . . . 2.5ppm/mA (1.25V Option)

• Operating Temperature Range. . . . . . . . . . .-40°C to +125°C

Related Literature

See AN1764, “ISL21090XXEV1Z User’s Guide”

FIGURE 1. ISL21090 TYPICAL APPLICATION DIAGRAM

10µF

0.1µF

CHIP SELECT

SERIAL CLOCK

SERIAL DATA I/O

VDD

VREF

SCLK

SDIO

CSb

OUTxS

GND

DACOUTx

VIN

VREF

0.1µF

OUTxF

DAC

1

2

3

4

DNC

GND

VOUT

TRIM

6

8

7

5

DNC

DNC

COMP

VIN

2.4980

2.4985

2.4990

2.5000

2.5005

2.5010

-55

-35

-15

5

25

45

65

85

105

125 145

TEMPERATURE (°C)

TYPICAL TEMPERATURE

COEFFICIENT CURVE FOR 10 UNITS

2.4995

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.

All other trademarks mentioned are the property of their respective owners.

November 21, 2012

FN6993.3