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INA1H94-SP

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Radiation-hardened, QML-V, high common-mode voltage difference amplifier

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Data sheet

INA1H94-SP

ACTIVE
Data sheet Order now

Product details

Number of channels 1 Vs (min) (V) 4 Vs (max) (V) 18 CMRR (min) (dB) 84 Common-mode input low (min) (V) -150 Common-mode input high (max) (V) 150 Input offset (±) (max) (V) 0.0035 Iq (typ) (mA) 0.81 Slew rate (typ) (V/µs) 5 Voltage gain (min) (V/V) 1 Voltage gain (max) (V/V) 1 Small-signal bandwidth (typ) (Hz) 500000 Rating Catalog, Space Operating temperature range (°C) -55 to 125 Gain error (±) (max) (%) 0.047
Number of channels 1 Vs (min) (V) 4 Vs (max) (V) 18 CMRR (min) (dB) 84 Common-mode input low (min) (V) -150 Common-mode input high (max) (V) 150 Input offset (±) (max) (V) 0.0035 Iq (typ) (mA) 0.81 Slew rate (typ) (V/µs) 5 Voltage gain (min) (V/V) 1 Voltage gain (max) (V/V) 1 Small-signal bandwidth (typ) (Hz) 500000 Rating Catalog, Space Operating temperature range (°C) -55 to 125 Gain error (±) (max) (%) 0.047
CFP (HKX) 8 155.4 mm² (6.475 mm × 24 mm)
  • QML Class V (QMLV), RHA, SMD (5962R2121201VXC)
  • Radiation performance
    • RHA up to TID = 100krad(Si)
    • ELDRS-free up to TID = 100krad(Si)
    • SEL immune to LET = 75MeV×cm2 /mg
    • SEE characterized to LET = 75MeV×cm2 /mg
  • Common-mode voltage range: ±150V
  • Minimum CMRR: 84dB from –55°C to +125°C
  • DC specifications:
    • Maximum offset voltage: 3500µV
    • Typical offset voltage drift: 3µV/°C
    • Maximum gain error: 0.047%
    • Typical gain error drift: 1.5ppm/°C
    • Typical gain nonlinearity: 0.0005% FSR
  • AC performance:
    • Small-signal bandwidth: 500kHz
    • Typical slew rate: 5V/µs
  • Wide supply range: ±2V to ±9V
    • Maximum quiescent current: 900µA
    • Output swing on ±9V supplies: ±7.5V
  • QML Class V (QMLV), RHA, SMD (5962R2121201VXC)
  • Radiation performance
    • RHA up to TID = 100krad(Si)
    • ELDRS-free up to TID = 100krad(Si)
    • SEL immune to LET = 75MeV×cm2 /mg
    • SEE characterized to LET = 75MeV×cm2 /mg
  • Common-mode voltage range: ±150V
  • Minimum CMRR: 84dB from –55°C to +125°C
  • DC specifications:
    • Maximum offset voltage: 3500µV
    • Typical offset voltage drift: 3µV/°C
    • Maximum gain error: 0.047%
    • Typical gain error drift: 1.5ppm/°C
    • Typical gain nonlinearity: 0.0005% FSR
  • AC performance:
    • Small-signal bandwidth: 500kHz
    • Typical slew rate: 5V/µs
  • Wide supply range: ±2V to ±9V
    • Maximum quiescent current: 900µA
    • Output swing on ±9V supplies: ±7.5V

The INA1H94-SP is a radiation-hardened precision unity-gain difference amplifier with a very high input common-mode voltage range. The INA1H94-SP is a single, monolithic device that consists of a precision op amp and an integrated thin-film resistor network. The INA1H94-SP can accurately measure small differential voltages in the presence of common-mode signals up to ±150V.

In many applications where galvanic isolation in not required, the INA1H94-SP can replace isolation amplifiers. The INA1H94-SP can help eliminate costly isolated input side power supplies, along with the associated ripple, noise, and quiescent current. The excellent 0.0005% typical nonlinearity, high common-mode, and 500kHz bandwidth of the INA1H94-SP makes for a compelling sensor readout device.

The INA1H94-SP is a radiation-hardened precision unity-gain difference amplifier with a very high input common-mode voltage range. The INA1H94-SP is a single, monolithic device that consists of a precision op amp and an integrated thin-film resistor network. The INA1H94-SP can accurately measure small differential voltages in the presence of common-mode signals up to ±150V.

In many applications where galvanic isolation in not required, the INA1H94-SP can replace isolation amplifiers. The INA1H94-SP can help eliminate costly isolated input side power supplies, along with the associated ripple, noise, and quiescent current. The excellent 0.0005% typical nonlinearity, high common-mode, and 500kHz bandwidth of the INA1H94-SP makes for a compelling sensor readout device.
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* Data sheet INA1H94-SP Radiation-Hardened, High Common-Mode Voltage Difference Amplifier datasheet (Rev. B) PDF | HTML Aug 7, 2025
* Radiation & reliability report INA1H94-SP Single-Event Effects (SEE) Radiation Report PDF | HTML Jul 23, 2025
* Radiation & reliability report INA1H94-SP Neutron Displacement Damage (NDD) Characterization Jul 17, 2025
* Radiation & reliability report INA1H94-SP Radiation-Hardened, High Common-Mode Voltage Difference Amplifier TID Report Jul 17, 2025
Product overview ±150V Common-Mode Difference Amplifiers for Voltage and High-Side Current Sensing in GEO and LEO Platforms PDF | HTML Apr 24, 2026
Selection guide TI Space Products (Rev. L) Mar 27, 2026
Design guide Radiation-Hardened Space Battery Management System (BMS) Reference Design PDF | HTML Jul 30, 2025
Certificate INA1H94EVM EU Declaration of Conformity (DoC) Jun 4, 2025

Design & development

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Evaluation board

INA1H94EVM — INA1H94 evaluation module

The INA1H94EVM is an evaluation module (EVM) to test the INA1H94-SP. The EVM is designed with populated circuits to quickly evaluate the functionality of the INA1H94 in 8-pin CFP package (HKX). The board offers flexibility with input and output connections through banana connectors, SMA/SMB (...)
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Evaluation board

INAEVM — Universal Instrumentation Amplifier Evaluation Module

The universal INAEVM (Instrumentation Amplifier Evaluation Module) is available in two package options that simplify prototyping precision instrumentation amplifiers in either the SO-8 (D) package or the MSOP-8(DGK) package with the pinout shown.  See the chart in the user guide (...)

User guide: PDF | HTML
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Simulation model

INA1H94-SP PSpice for TI Reference Design

SBOMCN7.ZIP (28 KB) - PSpice model
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Simulation model

INA1H94-SP TINA-TI Linear Operation Checker

SBOMCM8 (38 KB) - TINA-TI reference design
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Simulation model

INA1H94-SP TINA-TI Model

SBOMCN6.ZIP (4 KB) - TINA-TI Spice model
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Simulation model

INA1H94-SP TINA-TI Reference Design

SBOMCN8 (83 KB) - TINA-TI reference design
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Calculation tool

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

Supported products & hardware
Reference design

TIDA-010931 — Radiation hardened space battery management system (BMS) reference design

This reference design demonstrates a space-grade battery management system. The circuit measures eight battery cells in series to monitor battery health, state of charge and temperature.
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