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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 from 4.7V to

36V. The ISL21090 uses the new Intersil Advanced Bipolar

voltage accuracy of 0.02%.

The ISL21090 offers a 2.5V output voltage option with

7ppm/°C temperature coefficient and also provides excellent

line and load regulation. The device is 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.

Features

• Reference Output Voltage Option

- 2.5V (Released)

- 1.25V, 3.3V, 4.096V, 5V, 7V and 10V (Coming Soon)

• Initial Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .±0.02%

(2.5V Option)

• Supply Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . 930µA (Typ)

• Tempco . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7ppm/°C Max

(3ppm/°C Coming Soon)

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

• Line Regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8ppm/V

• Load Regulation . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5ppm/mA

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

Applications

• High-End Instrumentation

• Precision Voltage Sources for Data Acquisition System,

Industrial Control, Communication Infrastructure

• Process Control and Instrumentations

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.

June 8, 2011

FN6993.0