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-
- 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
Description
The ISL73100SEH is a radiation hardened 40V current sense amplifier built on the Renesas proprietary PR40 Silicon-on-Insulator (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 it ideal to use in both high-side and low-side applications.
The ISL73100SEH is a transconductance 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, 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 military temperature range of -55°C to +125°C.
Parameters
| Attributes | Value |
|---|---|
| Rating | Space |
| Common Mode Input Range (V) | -0.3 - 40 |
| Supply Voltage (min) (V) | 2.7 - 2.7 |
| Supply Voltage (max) (V) | 40 - 40 |
| Transconductance (typ) (µA/mV) | 2 |
| Voltage Offset (typ) (µV) | 10 |
| Temp. Range (°C) | -40 to +85°C, -40 to +125°C, -55 to +125°C |
| TID LDR (krad(Si)) | 75 |
| DSEE (MeV·cm2/mg) | 86.4 |
| Flow | RH Hermetic |
| Qualification Level | Class V, EM |
| Die Sale Availability? | Yes |
| PROTO Availability? | Yes |
Applications
- High-side or low-side current sensing
- Battery monitoring
- Power management
- Motor control
- Command, telemetry, and control systems
Renesas Boards & Kits
Radiation Hardened 40V Current Sense Amplifiers Evaluation Board
The ISL73100SEHEV1Z evaluation board is designed to evaluate the performance of the ISL70100SEH and ISL73100SEH radiation hardened 40V current sense amplifiers.
Built using the Renesas proprietary PR40 Silicon-on-Insulator (SOI) process, the ISL70100SEH and ISL73100SEH are transconductance... Read More
Knowledge Base
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ISL70100SEH and ISL73100SEH Input Voltage Derating
We already derate our parts. Our datasheets and SMDs show the absolute maximum voltages and currents under beam. Customers sometimes will write this into their specifications making notation that absolute max and recommended voltage rating from the vendor already derates the part. So you should not have to do any ...
Sep 12, 2025 -
Can the Hi-Rel Current Sense Amplifiers be Used for Both High-Side and Low-Side Sensing Configurations?
Yes. They can be used for both high or low-side sensing. There are two internal amplifiers and a common mode range detector. When the common mode voltage is below 1.7V the low-side amplifier is used to sense current and when the common mode voltage is above 1 ...
Jul 11, 2025 -
Can the Hi-Rel Current Sense Amplifiers Sense Current Bidirectionally?
The current can only be sensed in the positive direction, i.e. current flowing from RS+ to RS- pins.
Jul 11, 2025
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