Texas Instruments INA4290A1IRGVR

Overview

INA4290A1IRGVR from Texas Instruments is a quad-channel, ultra-precise, high-side current-sense amplifier with 20 V/V fixed gain, 2.7–120 V common-mode input range, ±12 µV max offset voltage, and 1.1 MHz bandwidth at 20 V/V. It enables accurate shunt-based current monitoring in high-voltage power rails such as 48-V server supplies and remote radio units.

For engineers reviewing the INA4290A1IRGVR datasheet, INA4290A1IRGVR pinout, INA4290A1IRGVR application, or INA4290A1IRGVR equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for precision current sensing in industrial and telecom power systems.

Technical Context

The INA4290A1IRGVR uses a transconductance architecture with current-feedback amplification to achieve low input bias current (20 µA typ) and high common-mode rejection-160 dB DC CMRR and 85 dB AC CMRR at 50 kHz-while operating exclusively in high-side sensing configurations. Its zero-drift topology ensures stable offset performance across −40°C to +125°C.

It integrates four independent A1-gain (20 V/V) channels in a single 4 mm × 4 mm QFN-16 package, each with matched internal resistor networks, 370 µA per-channel quiescent current, and rail-to-rail output swing capability (VS − 0.2 V min, GND + 25 mV max at 10 kΩ load).

Key Specifications

Pinout & Package

INA4290A1IRGVR is housed in a 4 mm × 4 mm, 16-pin QFN package (RGV) with exposed thermal pad. The package supports high-density PCB layouts and efficient heat dissipation (R_θJA = 45.9°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision, high-voltage current sensing applications.

Compared with INA4290A1IRGVR, the A2 variant trades gain for improved resolution at low currents, while the INA2290A1IDGKR reduces channel density and thermal performance to fit compact dual-rail monitoring-neither is pin-compatible, but both share identical functional behavior and calibration requirements.

Availability

INA4290A1IRGVR is available at Aetrix Electronics and suitable for 48-V rack server power monitoring, macro remote radio unit (RRU) current protection, and active antenna system (AAS) mMIMO bias control requiring stable component supply and long-term production continuity.

Supply support for INA4290A1IRGVR 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, server power, and industrial automation-emphasizing zero-drift stability, multichannel integration, and rugged transient tolerance.

FAQ

What is the maximum common-mode voltage the INA4290A1IRGVR can withstand continuously?

The INA4290A1IRGVR operates continuously over a common-mode input range of 2.7 V to 120 V. Its survival rating extends to −20 V to +122 V, allowing it to endure short-duration transients like load dumps or reverse-battery events without damage. This makes the INA4290A1IRGVR suitable for harsh 48-V and 120-V industrial and telecom power systems where voltage spikes are common.

Does the INA4290A1IRGVR support bidirectional current sensing?

No, the INA4290A1IRGVR is a high-side-only current-sense amplifier and does not support bidirectional sensing. Its input topology restricts operation to unidirectional, high-side configurations where IN+ connects to the bus voltage and IN− connects to the shunt's load side. For bidirectional applications, a separate device such as the INA240 or INA226 would be required. The INA4290A1IRGVR is optimized for precision in forward-current monitoring only.

How many independent current-sensing channels does the INA4290A1IRGVR provide?

The INA4290A1IRGVR integrates four fully independent, matched current-sense amplifier channels in a single QFN-16 package. Each channel has dedicated IN+, IN−, and OUT pins, with no shared internal circuitry affecting accuracy. This quad-channel architecture allows simultaneous monitoring of four separate power rails-such as CPU, memory, I/O, and auxiliary supplies-without inter-channel crosstalk (≥140 dB isolation at 100 kHz).

What is the typical quiescent current consumption of the INA4290A1IRGVR?

The INA4290A1IRGVR draws 1.25 mA typical total quiescent current (370 µA per channel × 4), with a maximum of 1.6 mA over temperature. This low power draw enables continuous operation in always-on telemetry and fault-monitoring circuits without significant impact on system efficiency-especially valuable in energy-sensitive 48-V server and RRU applications where standby power budgets are tightly constrained.

Can the INA4290A1IRGVR be used with a 3.3-V supply voltage?

Yes, the INA4290A1IRGVR operates with a minimum supply voltage of 2.7 V, making it fully compatible with 3.3-V systems. At 3.3 V, its output swing remains functional (GND + 25 mV to VS − 200 mV), and all key specifications-including offset, CMRR, and bandwidth-are maintained across the full −40°C to +125°C temperature range. This flexibility allows seamless integration into mixed-supply designs alongside 3.3-V microcontrollers and ADCs.