Texas Instruments INA296A1IDDFR

Overview

INA296A1IDDFR 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 −5V to 110V common-mode voltage, delivers 1.1MHz bandwidth and 8V/µs slew rate, and achieves ±0.01% gain error with ±10µV max offset voltage - enabling accurate low-side, high-side, or inline shunt monitoring in industrial power systems.

For engineers reviewing the INA296A1IDDFR datasheet, INA296A1IDDFR pinout, INA296A1IDDFR application, or INA296A1IDDFR equivalent, this page provides verified specifications, validated pin functions, real-world use cases in 48V BMS and macro RRU, and confirmed alternative options for precision current sensing at extended common-mode ranges.

Technical Context

The INA296A1IDDFR uses a zero-drift, precision topology that maintains constant 35µA input bias current across its full −20V to 120V survival common-mode range - independent of supply voltage. Its multistage architecture enables 1.1MHz small-signal bandwidth at all gains while preserving 166dB DC CMRR and sub-1µs 1% settling time.

It supports configurable unidirectional or bidirectional operation via dual reference pins (REF1/REF2), allowing output centering at mid-supply or rail-referenced configurations. The device draws only 2.5mA quiescent current from a 2.7V–20V supply and is specified over −40°C to +125°C ambient temperature.

Key Specifications

Pinout & Package

INA296A1IDDFR is packaged in an 8-pin SOT-23 (DDF) measuring 2.9mm × 2.8mm, optimized for space-constrained 48V power modules and telecom equipment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1IDR and MAX40056ASA+T, INA296A1IDDFR uniquely combines 1.1MHz bandwidth, ±0.01% gain accuracy, and dual-reference-pin configurability - making it the only option among the three capable of high-fidelity bidirectional current measurement in thermally demanding 48V infrastructure equipment.

Availability

INA296A1IDDFR is available at Aetrix Electronics and suitable for 48V DC/DC converter monitoring, 48V battery management systems (BMS), and macro remote radio unit (RRU) designs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for industrial deployment.

Supply support for INA296A1IDDFR 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 INA296x family was designed specifically for ultra-precise, high-bandwidth current sensing in next-generation 48V power architectures - addressing the need for sub-µV offset stability, rail-to-rail common-mode operation, and bidirectional flexibility in datacenter, telecom, and industrial systems.

FAQ

What is the maximum common-mode voltage the INA296A1IDDFR can withstand?

The INA296A1IDDFR supports an operational common-mode input range of −5V to 110V and a survival rating of −20V to 120V. This allows direct connection to 48V bus lines with margin for transients, and enables high-side sensing without external level-shifting circuitry. The device maintains specification compliance across this full range when powered from 2.7V–20V.

How does the REF1 and REF2 pin configuration affect bidirectional operation of the INA296A1IDDFR?

For bidirectional operation, INA296A1IDDFR requires REF1 connected to VS and REF2 connected to GND (or vice versa), establishing a mid-supply output offset. This allows the output to swing symmetrically above and below VS/2 in response to forward or reverse current flow through the shunt resistor - a configuration explicitly validated in TI's SBOSA04D datasheet Figure 7-1.

Can the INA296A1IDDFR be used in low-side current sensing configurations?

Yes, INA296A1IDDFR supports low-side, high-side, and inline current sensing. In low-side configuration, connect IN+ to the load side of the shunt and IN− to system ground. The device's −5V to 110V common-mode range accommodates ground-referenced measurements while maintaining full 1.1MHz bandwidth and ±0.01% gain accuracy - as confirmed in Section 7.3.1.3 of the datasheet.

What is the typical quiescent current draw of the INA296A1IDDFR across temperature?

The INA296A1IDDFR draws 2.5mA typical quiescent current at 25°C, rising to 3.2mA maximum over −40°C to +125°C. This low power consumption is maintained regardless of common-mode voltage - a key advantage over competing amplifiers whose IQ increases with VCM. The value is measured under VSENSE = 0mV conditions per Section 6.5 of the SBOSA04D datasheet.

Is the INA296A1IDDFR pin-compatible with other members of the INA296x family?

Yes, INA296A1IDDFR shares identical pinout and package (DDF, SOT-23-8) with all other INA296x variants including INA296A2–A5 and INA296B1–B5. Gain selection is factory-set and non-configurable, but PCB layout, decoupling, and reference connections remain fully interchangeable - enabling drop-in replacement for different gain requirements without redesign.