Texas Instruments INA293A5IDBVR

Overview

INA293A5IDBVR from Texas Instruments is an ultra-precise current sense amplifier designed for high-side and low-side shunt monitoring in 48-V industrial power systems. It delivers 500 V/V fixed gain, ±2 µV typical input offset voltage, 160-dB DC CMRR, 1.3-MHz bandwidth, and operates across –4 V to +110 V common-mode range - enabling accurate recirculating current measurement in half-bridge motor drives and fast overcurrent protection in server PSUs.

For engineers reviewing the INA293A5IDBVR datasheet, INA293A5IDBVR pinout, INA293A5IDBVR application, or INA293A5IDBVR equivalent, this page provides verified technical context, real-world design meaning of specifications, SOT-23 pin mapping, functional alternatives with documented differences, and supply-chain support for production deployment in 48-V BMS, macro RRU, and rack-server power rails.

Technical Context

The INA293A5IDBVR uses a transconductance architecture with current-feedback amplifier topology to achieve 20 µA typical input bias current at 110 V common-mode voltage and maintain <0.15% gain error across –40°C to +125°C. Its zero-drift input stage enables stable ±0.025 µV/°C offset drift and supports low-VSENSE operation down to 8 mV full-scale (at 500 V/V gain) for high-efficiency shunt sensing.

This variant implements unidirectional current sensing only, with output swing limited to GND + 5 mV (min) and VS – 70 mV (min) under load. Its 2.5 V/µs slew rate and <2 µs response time for 75-A/2-mΩ thresholds make it suitable for fast fault detection without external comparators.

Key Specifications

Pinout & Package

INA293A5IDBVR is housed in a 5-pin SOT-23 (DBV) package, 2.90 mm × 1.60 mm body size, optimized for space-constrained 48-V PSU layouts. Pin configuration follows the INA293A variant layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA296A5IDBVR and MAX40056ASA+T, the INA293A5IDBVR provides the best trade-off of ultra-low offset (±2 µV), industry-leading 160-dB DC CMRR, and compact SOT-23 packaging - making it the preferred choice for space- and accuracy-critical 48-V telecom and datacenter power systems.

Availability

INA293A5IDBVR is available at Aetrix Electronics and suitable for 48-V rack server PSUs, macro remote radio units (RRU), and battery management systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized channels.

Supply support for INA293A5IDBVR 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 INA293 product line was engineered specifically for high-accuracy, wide common-mode current sensing in next-generation 48-V infrastructure - targeting telecom, datacenter, and industrial power systems demanding sub-µV offset stability and robust transient immunity.

FAQ

What is the maximum common-mode voltage the INA293A5IDBVR can withstand during continuous operation?

The INA293A5IDBVR supports continuous operation from –4 V to +110 V common-mode voltage. Its survival rating extends to –20 V to +120 V, allowing tolerance of short-duration transients such as load dump or reverse battery in macro RRU deployments. This range is independent of supply voltage, enabling direct connection to 48-V rails without level-shifting circuitry.

Does the INA293A5IDBVR support bidirectional current sensing?

No, the INA293A5IDBVR operates in unidirectional mode only - it measures current flowing from power source to load. While its –4 V common-mode capability permits sensing of recirculating current in half-bridge configurations, it does not provide polarity-reversal output or true bidirectional gain. For bidirectional applications, TI recommends the INA240 or INA229 families instead.

What is the minimum shunt resistor value usable with the INA293A5IDBVR at full-scale 10-A current?

With 500 V/V gain and 5-V full-scale output, the INA293A5IDBVR requires only 10 mV across the shunt at 10 A - corresponding to a 1-mΩ resistor. This value is validated in Table 8-1 of the datasheet and enables 0.1-W power dissipation, reducing thermal stress and PCB footprint versus higher-resistance alternatives.

How does the INA293A5IDBVR's 900-kHz bandwidth compare to lower-gain variants in the same family?

The INA293A5IDBVR's bandwidth is specified at 900 kHz (vs. 1.3 MHz for the INA293A1), measured at 8 mV VSENSE input. This reduction reflects the gain-bandwidth trade-off inherent in its multistage transconductance architecture - yet 900 kHz remains sufficient for detecting sub-2-µs overcurrent events in 48-V server PSUs and RRU power stages.

Can the INA293A5IDBVR be used with a 3.3-V supply while maintaining full performance?

Yes - the INA293A5IDBVR operates from 2.7 V to 20 V, and all key specifications including gain error (±0.15%), offset (±2 µV), and CMRR (160 dB) are guaranteed across this range. At 3.3 V, output swing is limited to GND + 5 mV to 3.23 V, supporting direct interface with 3.3-V SAR ADCs without level shifting.