Texas Instruments INA296A5IDGKR

Overview

INA296A5IDGKR from Texas Instruments is an ultra-precise, bidirectional current sense amplifier optimized for high-voltage 48V systems, featuring 200V/V fixed gain, −5V to 110V common-mode input range, 1.1MHz bandwidth, ±10µV max offset voltage, and ±0.015% max gain error - enabling accurate shunt-based current monitoring in DC/DC converters and battery management.

For engineers reviewing the INA296A5IDGKR datasheet, INA296A5IDGKR pinout, INA296A5IDGKR application, or INA296A5IDGKR equivalent, this page delivers verified specifications, package mapping (VSSOP-8), functional pin definitions, real-world use cases in 48V BMS and macro RRU, and two validated alternative parts with documented technical and application differences.

Technical Context

The INA296A5IDGKR employs a zero-drift, precision topology that maintains ±10µV max input offset and ±0.1µV/°C drift across −40°C to +125°C, while delivering 166dB CMRR and 8V/µs slew rate - critical for rejecting bus noise and resolving fast overcurrent transients in high-side sensing configurations. Its reference-input architecture supports configurable unidirectional or bidirectional output centering via REF1/REF2 pins.

Unlike conventional current sense amplifiers, the INA296A5IDGKR achieves constant 35µA typical input bias current independent of common-mode voltage up to 110V, eliminating gain error drift caused by shunt leakage - a key enabler for low-resistance (<1mΩ), high-accuracy shunt designs in 48V server PSU and telecom power applications.

Key Specifications

Pinout & Package

VSSOP-8 package (DGK), 3mm × 4.9mm footprint, thermally enhanced for high-density 48V power board layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A5IDR and MAX40056ASA+T, the INA296A5IDGKR uniquely combines 110V VCM survival, ±10µV offset, and 1.1MHz bandwidth - making it the only option qualified for high-reliability 48V telecom rectifiers, macro RRU front-end protection, and automotive-grade 48V mild-hybrid BMS where both precision and ruggedness are mandatory.

Availability

INA296A5IDGKR 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 guaranteed traceable sourcing.

Supply support for INA296A5IDGKR 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 product line was engineered specifically for next-generation 48V power architectures - delivering ultra-precise, high-bandwidth current sensing in telecom, datacenter, and automotive mild-hybrid applications where traditional amplifiers fail under voltage stress or thermal drift.

FAQ

What is the maximum common-mode voltage the INA296A5IDGKR can withstand during operation?

The INA296A5IDGKR operates continuously from −5V to 110V common-mode input voltage. Its survival rating extends to −20V to 120V, making it suitable for 48V systems subject to IEC 61000-4-5 surge testing. This exceeds the operational range of most competing amplifiers, including the INA240 series, and ensures robustness in telecom rectifier and macro RRU front-end designs where transient overvoltage is routine.

How does the REF1 and REF2 pin configuration affect bidirectional current measurement in the INA296A5IDGKR?

In the INA296A5IDGKR, connecting REF1 to VS and REF2 to GND (or vice versa) sets the output quiescent voltage to VS/2, enabling true bidirectional operation: positive current produces output above VS/2, negative current produces output below VS/2. This eliminates need for external level-shifting circuitry and preserves full dynamic range - a capability confirmed in TI's SBOSA04D datasheet Figure 7-1 and Section 7.4.3.

What is the guaranteed maximum gain error for the INA296A5IDGKR across temperature?

The INA296A5IDGKR has a maximum gain error of ±0.015% at room temperature and ±2 ppm/°C drift over −40°C to +125°C, resulting in ≤±0.025% total error across its full operating range. This specification is explicitly stated in Table 6-5 of the SBOSA04D datasheet under "Gain Error Drift" for A5 devices, distinguishing it from the B5 variant's ±5 ppm/°C drift.

Can the INA296A5IDGKR be used in low-side current sensing configurations?

Yes - the INA296A5IDGKR supports low-side, high-side, and inline sensing. 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 accommodates ground-referenced measurements while maintaining 166dB CMRR and ±10µV offset, as verified in Section 7.3.1 and Figure 8-1 of the official datasheet.

What package type and thermal performance does the INA296A5IDGKR use?

The INA296A5IDGKR uses the DGK (VSSOP-8) package, measuring 3mm × 4.9mm, with a junction-to-ambient thermal resistance (RθJA) of 167.2°C/W. Its junction-to-board (RθJB) is 88.9°C/W, indicating effective heat conduction through PCB copper - critical for sustained operation in thermally constrained 48V PSU modules. These values are specified in Table 6-4 of the SBOSA04D datasheet.