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36V Radiation Tolerant Precision Instrumentation Amp

with Rail-to-Rail Output Differential ADC Driver

ISL70617SEH

The ISL70617SEH is a high performance, differential input,

differential output instrumentation amplifier designed for

precision analog-to-digital applications. It can operate over a

supply range of 8V (±4V) to 36V (±18V) and features a

differential input voltage range up to ±30V. The output stage

has rail-to-rail output drive capability optimized for differential

ADC driver applications. The output stage is powered by

separate supplies. This feature enables the output to be driven

by the same low voltage supplies powering the ADC, thereby

providing protection from high voltage signals and the low

voltage digital circuits. Its versatility makes it suitable for a

variety of general purpose applications. Additional features not

found in other instrumentation amplifiers enable high levels of

DC precision and excellent AC performance.

The gain of the ISL70617SEH can be programmed from 0.1 to

gain resistors have Kelvin sensing, which removes gain error

due to PC trace resistance. The input and output stages have

individual power supply pins, which enable input signals riding

on a high common-mode voltage to be level shifted to a low

voltage device, such as an A/D converter. The rail-to-rail output

stage can be powered from the same supplies as the ADC,

which preserves the ADC maximum input dynamic range and

eliminates ADC input overdrive.

The ISL70617SEH is offered in a 24 Ld ceramic flatpack

package with an operating temperature range of -55°C to

+125°C.

Features

• Rail-to-rail differential output ADC driver

• Low input offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30µV

• Input bias current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.2nA

• Excellent CMRR and PSRR . . . . . . . . . . . . . . . . . . . . . . . 120dB

• Wide operating voltage range . . . . . . . . . . . . . . . ±4V to ±18V

• Operating temperature range. . . . . . . . . . . .-55°C to +125°C

• Acceptance tested to 75krad(Si) (LDR) wafer-by-wafer

• Radiation tolerance

- Low dose rate (0.01rad(Si)/s) . . . . . . . . . . . . . . 75krad(Si)

Applications

•ADC driver

• Precision test and measurement

• High voltage process control

• Signal conditioning for remote powered sensors

• Satellite communication

Related Literature

• For a full list of related documents, visit our website

- ISL70617SEH product page

FIGURE 1. COMPLETE SPACE GRADE ANALOG SIGNAL CHAIN

IN+

IN-

ISL70617SEH

+RIN

IN+

IN-

+RFB

-RFB

VCC

VEE

VEO

ISL70617SEH

+18V

+18V

-18V

-18V

5V

SIGNAL WITH

HIGH VCM

SIGNAL

5V

ISL71090SEH25

GAIN = 10

GAIN = 0.1

IN

REF

V

GND

ISL71090SEH25

GND

RHADC

-RIN

+VOUT

VEO

VEE

-RFB

+RFB

-RIN

+RIN

VCC

VCO

+VFB

GND

VCC

-VFB

-VOUT

+VOUT

VCO

+VFB

-VFB

-VOUT

Ch 1

Ch 16

Ch 1

Ch 16

December 16, 2016

FN8697.4