Overview

Description

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 transconductance amplifier that monitors the 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 the 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 which 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.

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

Comparison

Applications

Applications

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

Documentation

Design & Development

Boards & Kits

Boards & Kits

Models