INA950A1MPWTSEP

Instrumentation, Op Amps, Buffer Amps Overview

The INA950A1MPWTSEP is a radiation-hardened, high-side current-sense amplifier designed for space applications. It operates with a supply voltage of 2.7V to 5.5V and supports a common-mode input range from 2.7V to 80V. The device features a fixed gain of 20V/V, a bandwidth of 1.1MHz, and a slew rate of 2V/µs. Key electrical specifications include a maximum offset voltage of ±12µV, a DC CMRR of 160dB, and a quiescent current of 370µA. It is housed in an 8-pin TSSOP package.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Radiation hardening with assurance up to 30krad(Si) and SEL immunity up to 43MeV-cm2/mg
• Ultra-precise zero-drift architecture enabling low offset voltage and drift
• Wide common-mode voltage range supporting high-side sensing up to 80V
• High-speed response suitable for fast overcurrent protection

Instrumentation, Op Amps, Buffer Amps Applications

• Satellite electrical power systems (EPS)
• Command and data handling (C&DH) circuits
• Radar imaging payload monitoring
• Communications payload current sensing

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix A1MPWT against the official datasheet to confirm the exact grade, temperature range, and packaging configuration. Ensure that the radiation qualification requirements match the mission profile. Confirm availability through authorized distributors as space-grade components may have limited stock or longer lead times compared to commercial parts.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when high-side current sensing is required in environments with significant total ionizing dose exposure. The wide common-mode range allows direct connection to high-voltage rails without level shifting. The fixed gain simplifies design by eliminating external precision resistors, while the low bias current minimizes errors associated with high source impedances.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the INA950-SEP family, which is specifically engineered for space electronics. It utilizes a transconductance architecture with a current-feedback amplifier to achieve low bias currents and high common-mode rejection. The series is designed to meet stringent reliability standards for aerospace and defense applications.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Direct replacements are limited due to the specific radiation hardening and space qualification. Verify if other parts in the INA950-SEP family with different gain options or packages are suitable. Commercial equivalents lack the necessary radiation tolerance and should not be used without extensive testing and derating.

Instrumentation, Op Amps, Buffer Amps FAQ

Is the INA950-SEP capable of bidirectional current sensing?

No, the INA950-SEP is designed for unidirectional operation only, sensing current sourced from a power supply to a system load.

What is the maximum survival voltage for the common-mode inputs?

The device can survive common-mode voltages ranging from -20V to 85V, although its operational range is 2.7V to 80V.