ISL70617SEH

36V Radiation Tolerant Precision Instrumentation Amp with Rail-to-Rail Output Differential ADC Driver

OVERVIEW

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 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 ISL70617SEH is offered in a 24 Ld ceramic flatpack package with an operating temperature range of -55°C to +125°C.

KEY 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
  • Closed loop -3dB BW 0.3MHz (AV = 1k) to 5.5MHz (AV = 0.1)
  • 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) - SEB LETTH (VS = ±18V): 60MeV•cm2/mg

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL70617SEH
Basic Information
Production Status
Mass Production
# of Devices/ Channels
1
Bandwidth (MHz)
5.5
Slew Rate (V/μs)
4
VS (min)
8 V
VS (max)
40 V
IS (per amp)
4.3 mA
Noise VN (nV/√Hz)
8.6
IBIAS (max)
25 nA
Max Offset Voltage
300 µV
Low Dose Rate (ELDRS) krad(Si)
75
Qualification Level
QML Class V (space)
DLA SMD
5962-15246
IOUT
45 mA
Rail-to-Rail Input
No
Rail-to-Rail Output
Yes
Class
V, /PROTO
CMRR (dB)
120
SMD URL
https://landandmaritimeapps.dla.mil/Downloads/MilSpec/Smd/15246.pdf
SEL (MeV/mg/cm2)
SEL free
Temperature Range
-55 to +125

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