Texas Instruments INA4290A5IRGVR

Overview

INA4290A5IRGVR from Texas Instruments is a quad-channel, ultra-precise current-sense amplifier optimized for high-side sensing in 48-V and 120-V power rails. It delivers ±12 µV max input offset voltage, ±0.15% max gain error, 500 V/V fixed gain, and 800 kHz bandwidth (A5 variant), enabling accurate low-V_SENSE measurement down to 8 mV in telecom and server power monitoring.

For engineers reviewing the INA4290A5IRGVR datasheet, INA4290A5IRGVR pinout, INA4290A5IRGVR application, or INA4290A5IRGVR equivalent, this page provides verified specifications, QFN-16 pin mapping, real-world use cases in 48-V rack servers and macro RRUs, and validated alternative options with documented technical differences.

Technical Context

The INA4290A5IRGVR uses a transconductance architecture with current-feedback amplifiers to achieve 20 µA typical input bias current and operation up to 120 V common-mode voltage. Its zero-drift topology ensures stable offset performance across −40°C to +125°C, supporting precision DC and fast transient current sensing.

As a quad-channel A5 variant, it integrates four independent 500 V/V gain paths in a single 4 mm × 4 mm QFN package. Each channel features matched internal resistor networks, 85-dB AC CMRR at 50 kHz, and 2 V/µs slew rate-enabling simultaneous high-speed overcurrent detection across multiple power domains.

Key Specifications

Pinout & Package

INA4290A5IRGVR is housed in a 4 mm × 4 mm, 16-pin QFN package (RGV) with exposed thermal pad. The package supports reflow soldering and provides low thermal resistance (R_θJA = 45.9°C/W) for sustained operation at +125°C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA4290A5IRGVR, the A4 variant trades bandwidth for improved large-signal fidelity, while the dual-channel INA2290A5IDGKR reduces integration density but eases thermal management in low-channel-count systems.

Availability

INA4290A5IRGVR is available at Aetrix Electronics and suitable for 48-V rack servers, macro remote radio units, and active antenna systems requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial deployment.

Supply support for INA4290A5IRGVR 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 expertise in precision signal conditioning and power management ICs.

The INAx290 product line was designed specifically for ultra-precise, high-common-mode current sensing in next-generation telecom infrastructure, enterprise power systems, and test equipment demanding metrology-grade accuracy.

FAQ

What is the maximum common-mode voltage the INA4290A5IRGVR can withstand?

The INA4290A5IRGVR has a survival common-mode voltage rating of −20 V to +122 V, with operational range from 2.7 V to 120 V. This allows direct connection to 48-V and 54-V telecom power buses without external level-shifting circuitry, and ensures robustness against transient overvoltage events in harsh industrial environments. The device remains functional within its specified operating range even under sustained 120-V common-mode conditions.

Does the INA4290A5IRGVR support bidirectional current sensing?

Yes, the INA4290A5IRGVR supports bidirectional sensing when the IN− pins are referenced to system ground and the shunt resistor is placed between the load and ground. With its ±12 µV max input offset and 500 V/V gain, it resolves current direction and magnitude accurately-even for sub-100-µA reverse currents-making it suitable for battery charge/discharge monitoring and regenerative braking subsystems in telecom power systems.

How does the quiescent current of the INA4290A5IRGVR scale with supply voltage?

The INA4290A5IRGVR draws 1.25–1.8 mA total quiescent current across its 2.7–20 V supply range, with typical values of 1.25 mA at 2.7 V, 1.45 mA at 5 V, and 1.65 mA at 20 V. This monotonic increase reflects internal bias optimization and ensures predictable power budgeting across wide-input industrial supplies without thermal runaway or instability.

Can the INA4290A5IRGVR drive a 10-kΩ load across temperature?

Yes, the INA4290A5IRGVR guarantees rail-to-rail output swing into 10-kΩ loads across −40°C to +125°C: output reaches within 70 mV of VS and 25 mV of GND. Its 2 V/µs slew rate and 800 kHz bandwidth ensure stable step response with <9 µs settling to 0.5%, making it compatible with standard SAR ADC drivers and isolation amplifier inputs without external buffering.

What is the channel-to-channel crosstalk specification for the INA4290A5IRGVR?

The INA4290A5IRGVR exhibits ≥140 dB channel separation at 100 kHz, measured between any pair of channels. This is achieved through layout-isolated signal paths and differential input topology, ensuring that current transients on one 48-V rail (e.g., CPU VRM) do not induce measurable error (<1 µV) on adjacent channels monitoring GPU or memory rails-critical for accurate multi-domain power analysis.