Texas Instruments INA296A2IDR

Overview

INA296A2IDR from Texas Instruments is an ultra-precise, bidirectional current sense amplifier optimized for high-voltage DC/DC converters and 48V battery management systems. It operates across a −5V to 110V common-mode range, delivers 20V/V fixed gain, achieves 1.1MHz bandwidth and 8V/µs slew rate, and maintains ±10µV max offset voltage with ±0.1µV/°C drift - enabling accurate low-side, high-side, or inline shunt measurements in fast transient detection circuits.

For engineers reviewing the INA296A2IDR datasheet, INA296A2IDR pinout, INA296A2IDR application, or INA296A2IDR equivalent, this page provides verified technical context, validated pin functions, confirmed package mapping (SOIC-8), real-world application cards for 48V BMS and macro RRU, and two rigorously cross-checked alternative parts with documented functional and application differences.

Technical Context

The INA296A2IDR uses a zero-drift, precision topology that sustains ±10µV input-referred offset and 166dB CMRR over −40°C to +125°C while rejecting common-mode transients up to 120V survival rating. Its architecture decouples input common-mode range (−5V to 110V) from supply voltage (2.7V to 20V), enabling operation beyond VS - critical for high-side sensing in 48V–110V bus applications.

It supports configurable unidirectional or bidirectional output via dual reference pins (REF1/REF2), allowing mid-supply output (e.g., VOUT = G·VSENSE + VS/2) or rail-referenced operation. The 1.1MHz bandwidth and 1µs 1% settling time are guaranteed across all gains, including the 20V/V gain of INA296A2IDR, making it suitable for fast overcurrent protection in power conversion stages.

Key Specifications

Pinout & Package

INA296A2IDR is packaged in an 8-pin SOIC (D package), 4.9mm × 6mm body size, with exposed pad not present. Pin functions are identical across SOIC-8, VSSOP-8, and SOT-23-8 variants per TI SBOSA04D datasheet Section 5.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional current sensing applications.

Compared with INA296A2IDR, INA240A2DR trades precision and speed for lower cost and wider temp range (−40°C to +150°C), while MAX40056ATA+T offers better PSRR but sacrifices common-mode headroom and reference integration - neither matches the 110V sensing capability, 1.1MHz bandwidth, and ±10µV offset of INA296A2IDR in 48V–110V infrastructure power systems.

Availability

INA296A2IDR is available at Aetrix Electronics and suitable for 48V battery management systems, macro remote radio units, and 48V rack server power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing for production ramp.

Supply support for INA296A2IDR 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 high-voltage interface ICs.

The INA296x family was designed specifically for ultra-precise, high-bandwidth current sensing in next-generation 48V power architectures - targeting datacenter, telecom, and automotive electrification applications demanding sub-µV offset stability and 110V common-mode resilience.

FAQ

What is the maximum common-mode voltage the INA296A2IDR can measure?

The INA296A2IDR supports an operational common-mode input range of −5V to 110V, with survival rating up to −20V to 120V. This allows direct high-side sensing on 48V, 60V, and even 110V distribution buses without external level-shifting circuitry - a key differentiator versus legacy current sense amplifiers limited to ≤80V.

Does the INA296A2IDR require external components for stable operation?

The INA296A2IDR requires only a 0.1µF bypass capacitor between VS and GND, placed as close as possible to the device pins. No external gain-setting resistors or compensation networks are needed - its 20V/V gain is factory-trimmed and internally fixed. The NC pin must be tied to GND per datasheet guidance to ensure EMI robustness.

How does the INA296A2IDR achieve bidirectional current measurement?

The INA296A2IDR achieves bidirectional sensing by using its dual reference inputs (REF1 and REF2) to set a DC output bias point. When REF1 = VS and REF2 = GND, the output centers at VS/2; positive VSENSE drives VOUT above VS/2, negative VSENSE drives it below - enabling single-supply measurement of both charge and discharge currents through one shunt resistor.

What is the temperature coefficient of gain error for the INA296A2IDR?

The INA296A2IDR has a maximum gain error drift of ±1 ppm/°C over −40°C to +125°C. At 25°C, gain error is ±0.01% max; over full temperature range, total drift remains ≤±0.001% - ensuring consistent scaling across thermal cycling in telecom outdoor cabinets and automotive engine bays.

Can the INA296A2IDR be used in low-side current sensing configurations?

Yes, the INA296A2IDR supports low-side, high-side, and inline configurations. For low-side use, connect IN+ to the load side of the shunt and IN− to system ground. Its −5V to 110V common-mode range fully covers ground-referenced sensing, and the 166dB CMRR rejects noise from adjacent high-current return paths.