Texas Instruments INA293A1IDBVT

Overview

INA293A1IDBVT from Texas Instruments is an ultra-precise current sense amplifier for high-side and low-side shunt monitoring in 48-V power systems, featuring 20 V/V fixed gain, −4 V to +110 V common-mode input range, ±0.15% max gain error, ±15 µV typical offset voltage, and 1.3 MHz bandwidth. It enables accurate recirculating current measurement in half-bridge motor drives and fast overcurrent protection in telecom PSUs.

For engineers reviewing the INA293A1IDBVT datasheet, INA293A1IDBVT pinout, INA293A1IDBVT application, or INA293A1IDBVT equivalent, key selection criteria include common-mode survival at −20 V/+120 V, DC CMRR of 160 dB, 2.5 V/µs slew rate, 1.5 mA quiescent current, and SOT-23 (DBV) package compatibility with space-constrained 48-V BMS and RRU designs.

Technical Context

The INA293A1IDBVT uses a transconductance architecture with current-feedback amplifier topology to achieve 20 µA typical input bias current at 110 V common-mode, enabling low-leakage sensing on high-impedance shunts. Its zero-drift input stage delivers ±0.05 µV/°C offset drift and supports unidirectional current measurement only.

It operates from 2.7 V to 20 V supply, provides rail-to-rail output swing (within 70 mV of VS and 5 mV of GND), and maintains 1.3 MHz bandwidth at 20 V/V gain with 5 pF load-critical for sub-2 µs response to 75-A inrush events on 2-mΩ shunts.

Key Specifications

Pinout & Package

SOT-23 (DBV) 5-pin package, 2.90 mm × 1.60 mm body size, rated for −40°C to +125°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A1IDR and MAX40016AUB+, the INA293A1IDBVT delivers superior DC precision (160 dB CMRR, ±15 µV offset) and compact SOT-23 packaging-making it optimal for space- and accuracy-constrained 48-V telecom and server power monitoring where sub-2-µs fault response is mandatory.

Availability

INA293A1IDBVT is available at Aetrix Electronics and suitable for 48-V rack server PSUs, macro RRU power modules, and active antenna mMIMO systems requiring stable component supply with guaranteed long-term sourcing.

Supply support for INA293A1IDBVT 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 delivering analog and embedded processing solutions, with over 50 years of innovation in precision signal chain components.

The INA293 product line targets high-accuracy, high-bandwidth current sensing in next-generation 48-V power architectures-including telecom infrastructure, data center servers, and battery-powered industrial systems-where reliability across −40°C to +125°C is non-negotiable.

FAQ

What is the maximum common-mode voltage the INA293A1IDBVT can withstand continuously?

The INA293A1IDBVT operates continuously over a common-mode input range of −4 V to +110 V. Its survival rating extends to −20 V to +120 V, allowing tolerance of short-duration transients beyond operational limits-critical for robustness in 48-V server PSUs during hot-swap events. This specification is validated across the full −40°C to +125°C temperature range and applies directly to the INA293A1IDBVT device.

Does the INA293A1IDBVT support bidirectional current sensing?

No, the INA293A1IDBVT operates in unidirectional mode only, designed to measure current flowing from power supply to load. While its −4 V common-mode capability enables sensing of recirculating currents in half-bridge freewheeling paths (by referencing IN− below ground), it does not provide true bidirectional output polarity inversion. For full bidirectional measurement, a separate design using dual amplifiers or a dedicated bidirectional part like INA229 is required. This limitation applies specifically to the INA293A1IDBVT.

What is the typical input offset voltage of the INA293A1IDBVT and how does it affect low-current measurement?

The INA293A1IDBVT has a typical input offset voltage of ±15 µV, with a maximum of ±150 µV over temperature. When used with a 10-mΩ shunt resistor, this translates to a worst-case current measurement error of ±15 mA at room temperature-enabling reliable sub-100-mA detection in 48-V BMS cell monitoring. The ±0.05 µV/°C drift ensures total offset variation remains under ±1 µV across a 20°C ambient change, preserving calibration stability in thermally variable RRU enclosures. This performance is specified for the exact INA293A1IDBVT variant.

Can the INA293A1IDBVT drive a 10-kΩ load while maintaining specified accuracy?

Yes, the INA293A1IDBVT is characterized with R_LOAD = 10 kΩ for output swing, settling time, and linearity specifications. Its output stage delivers full-scale accuracy (e.g., ±0.15% gain error) and 10-µs settling to 0.5% under this load. Driving lower-impedance loads (<1 kΩ) may degrade bandwidth and increase output droop; for such cases, a buffer amplifier is recommended. All electrical characteristics in the official datasheet for INA293A1IDBVT assume 10-kΩ loading unless otherwise noted.

What package type and pin configuration does the INA293A1IDBVT use?

The INA293A1IDBVT uses the SOT-23 (DBV) 5-pin package with dimensions 2.90 mm × 1.60 mm. Its pinout is: Pin 1 = OUT, Pin 2 = GND, Pin 3 = IN+, Pin 4 = IN−, Pin 5 = Vs. This matches the INA293A variant configuration (not INA293B), as confirmed by TI's SBOS470B datasheet Figure 5-1 and Table 5-1. The DBV package supports reflow soldering and is qualified for industrial temperature operation.