The ISL70517SEH is a high performance, differential input,

single-ended 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 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 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 ISL70517SEH can be programmed from 0.1 to

10,000 via two external resistors, RIN and RFB. The gain

accuracy is determined by the matching of RIN and RFB. The

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 ISL70517SEH is offered in a 24 Ld ceramic flatpack

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

+125°C.

特性 Features

? Rail-to-rail single-ended output ADC driver

? Low input offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30μV

? Input bias current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.2nA

? Excellent CMRR and PSRR . . . . . . . . . . . . . . . . . . . . . . 120dB

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

? Closed loop -3dB BW 0.3MHz (AV = 1k) to 5.5MHz (AV = 0.1)

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

? Electrically screened to DLA SMD# 5962-15246

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

? Radiation tolerance

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

- SEB LETTH (VS = ±18V). . . . . . . . . . . . . . . 60MeV?cm2/mg

Applications

? ADC driver

? Precision test and measurement

? High voltage process control

? Signal conditioning for remote powered sensors

? Satellite communication