ISL70100SEH

Radiation Hardened 40V High Side Current Sense Amplifiers

Product Status: Mass Production

OVERVIEW

The ISL70100SEH is a radiation hardened 40V current sense amplifier built on the Renesas proprietary PR40 SOI process. This device has a wide power supply range of 2.7V to 40V. The input common-mode voltage is independent of the supply voltage and extends from -0.3V to 40.0V, making them ideal to use in both high-side and low-side applications.

The ISL70100SEH is a trans-conductance amplifier that monitors current using an external sense resistor and outputs a current proportional to the sensed voltage. The overall voltage gain is adjustable with a single resistor from the output to ground.

This amplifier has an extremely low offset voltage and input bias currents, making it ideal for precision sensing applications. It has a minimum bandwidth of 500kHz with a slew rate of 500µA/µs that makes it useful for current feedback in telemetry applications. When the part is powered down (V+ = V- = 0V), the sense pins (RS+, RS-) are high impedance to avoid loading the monitored circuit.

The part is available in a hermetically sealed 10 Ld ceramic flat-pack package or die form and operates across the full-range military temperature of -55°C to +125°C.

KEY FEATURES

  • Power supply range: 2.7V to 40V
  • Input common-mode range: -0.3V to 40V
  • Transconductance: 2µA/mV (typical)
    • ±1% accuracy (TA = 25°C)
    • ±1.5% accuracy (TA = -55°C, 125°C)
  • Voltage offset: 10µV (typical), V+ = 12V
  • Adjustable gain with a single resistor
  • Radiation acceptance testing-
    • HDR (50-300rad(Si)/s): 100krad(Si) 
    • LDR (<10mrad(Si)/s): 75krad(Si)
  • SEE hardness (see SEE report for details)
    • No SEB (V+ = 35V): 86.4MeV•cm2/mg
    • No SEB (V+ = 42V): 43.0MeV•cm2/mg
  • Electrically Screened to SMD 5962-20212
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    APPLICATIONS

  • High-side or low-side current sensing
  • Battery monitoring
  • Power management
  • Motor control
  • Command, telemetry, and control systems

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL70100SEH
Basic Information
Production Status
Mass Production
Gain (V/V)
Adjustable
VS (min)
2.7V
VS (max)
40V
IS (per amp)
250µA
Bandwidth
500 kHz
Sense Direction
Unidirectional
Features
Low/High Side Capable
PSRR (dB)
96
Output
Voltage
Max Offset Voltage
400µV
CMRR (dB)
106
Common Mode Input Range (min)
-0.3V
Common Mode Input Range (max)
40V
Low Dose Rate (ELDRS) krad (Si)
75
High Dose Rate (HDR) krad (Si)
100
SEL (MeV/mg/cm2)
86.4
Qualification Level
QML Class V (space)
DLA SMD
5962-20212
Class
V, /PROTO
SMD URL
Temperature Range
-55 to +125

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