Texas Instruments INA190A5NDDFREP

Overview

INA190A5NDDFREP from Texas Instruments is a radiation-tolerant, bidirectional, zero-drift current-sense amplifier with 500 V/V fixed gain, ±15 µV max offset voltage, and –0.2 V to +40 V wide common-mode input range. It operates from 1.7 V to 5.5 V supply, draws only 65 µA quiescent current when enabled, and supports precision microamp-level current measurement in defense-grade avionics power monitoring.

For engineers reviewing the INA190A5NDDFREP datasheet, INA190A5NDDFREP pinout, INA190A5NDDFREP application, or INA190A5NDDFREP equivalent, this page delivers verified electrical specs, SOT-23-8 pin functions, high-side/low-side sensing guidance, and validated alternatives for aerospace-grade current sensing designs requiring extended temperature (–55°C to +150°C) and controlled baseline traceability.

Technical Context

The INA190A5NDDFREP uses a capacitively coupled front-end architecture to achieve 132 dB minimum CMRR and reject DC common-mode shifts up to 40 V - independent of its 1.7–5.5 V supply rail. Its zero-drift core ensures <80 nV/°C offset drift and enables accurate bidirectional sensing via externally biased REF pin.

With 500 V/V gain, it delivers 9–44 kHz small-signal bandwidth (depending on load), 0.1–1 V/µs slew rate, and rail-to-rail output swing (GND +1 mV to VS –40 mV). The ENABLE pin reduces supply current to <0.1 µA in shutdown while placing OUT in high-impedance state - critical for intermittent monitoring in battery-constrained systems.

Key Specifications

Pinout & Package

SOT-23-8 (DDF) package: 1.60 mm × 2.90 mm body, 0.65 mm pitch, thermally enhanced bottom-side pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current-sense amplifier applications.

Compared with INA190A5NDDFREP, INA240A5QDGSRQ1 trades extended temperature and defense-grade traceability for automotive qualification, while INA186A5IDRLR omits ENABLE and military temp support - making both unsuitable as drop-in replacements in EP-class avionics but viable for less demanding environments.

Availability

INA190A5NDDFREP is available at Aetrix Electronics and suitable for avionics power monitoring, radar system diagnostics, smart munitions safety interlocks, and ruggedized communications requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for INA190A5NDDFREP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of heritage in high-reliability aerospace and defense components.

The INA190-EP product line was designed specifically for mission-critical current sensing in defense, aerospace, and medical systems - delivering extended temperature operation, controlled baseline manufacturing, and full product traceability.

FAQ

What is the maximum common-mode voltage the INA190A5NDDFREP can handle?

The INA190A5NDDFREP supports a common-mode input voltage range of –0.2 V to +40 V, independent of its 1.7–5.5 V supply voltage. This allows direct high-side sensing on 28 V or 40 V bus rails without external level-shifting circuitry. The specification is guaranteed over the full –55°C to +150°C operating temperature range, making it suitable for avionics and radar power systems where bus transients exceed supply rails.

Does the INA190A5NDDFREP support bidirectional current sensing?

Yes, the INA190A5NDDFREP supports true bidirectional current sensing via its REF pin. Applying a mid-supply voltage (e.g., VS/2) to REF centers the output voltage, allowing positive differential inputs (IN+ > IN–) to produce outputs above REF and negative inputs (IN+ < IN–) to produce outputs below REF. This enables precise measurement of charging/discharging currents in battery management and motor control applications within the device's specified accuracy limits.

What is the typical quiescent current of the INA190A5NDDFREP in enabled and disabled states?

In enabled state, the INA190A5NDDFREP draws a maximum of 65 µA quiescent current at 25°C - with typical values around 48–50 µA. When disabled (ENABLE ≤ 0.3×VS), supply current drops to ≤100 nA, typically <0.1 µA. This ultra-low shutdown current is critical for intermittent monitoring in battery-powered defense electronics where energy conservation across long idle periods is essential.

Can the INA190A5NDDFREP be used with a 1.8 V supply?

Yes, the INA190A5NDDFREP is fully specified for operation from 1.7 V to 5.5 V supply. At 1.8 V, it maintains rail-to-rail output swing (GND +1 mV to VS –40 mV), 500 V/V gain accuracy, and functional ENABLE control. Its low-voltage capability enables integration into modern low-power avionics subsystems and miniaturized radar modules where 1.8 V logic domains are standard - without sacrificing offset or CMRR performance.

What package type does the INA190A5NDDFREP use, and is it RoHS-compliant?

The INA190A5NDDFREP uses the SOT-23-8 (DDF) package with nominal dimensions of 1.60 mm × 2.90 mm and 0.65 mm lead pitch. It is manufactured under Texas Instruments' controlled baseline process for extended product life cycle and full traceability. The device complies with RoHS Directive 2011/65/EU and is lead-free, halogen-free, and compliant with TI's corporate environmental standards for defense and aerospace applications.