Texas Instruments INA293A2QDBVRQ1

Overview

INA293A2QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 ultra-precise current sense amplifier for automotive high-side and low-side shunt monitoring, featuring 50 V/V fixed gain, −4 V to +110 V common-mode input range, ±15 µV typical offset voltage, 1.3 MHz bandwidth, and 160-dB DC CMRR - deployed in 48-V solenoid control and DC/DC converter overcurrent protection.

For engineers reviewing the INA293A2QDBVRQ1 datasheet, INA293A2QDBVRQ1 pinout, INA293A2QDBVRQ1 application, or INA293A2QDBVRQ1 equivalent, key selection criteria include unidirectional sensing capability, functional safety documentation support, survival voltage rating (−20 V to +120 V), quiescent current (1.5 mA), and SOT-23 package compatibility with PCB layout constraints for high-voltage automotive signal chains.

Technical Context

The INA293A2QDBVRQ1 uses a transconductance architecture with current-feedback amplifier topology, enabling 20 µA typical input bias current at 110 V common-mode and supporting operation below ground (−4 V) for recirculating current measurement in half-bridge configurations. Its zero-drift input stage delivers stable offset performance across −40 °C to +125 °C.

This variant implements fixed 50 V/V gain via precision internal resistor network (10 kΩ/500 kΩ), with gain error ≤ ±0.15% (max) and drift ≤ ±10 ppm/°C. It achieves 85-dB AC CMRR at 50 kHz and supports fast transient response (<2 µs for 75-A threshold on 2-mΩ shunt) due to 2.5 V/µs slew rate and 1.3-MHz small-signal bandwidth.

Key Specifications

Pinout & Package

SOT-23 (DBV) 5-pin package, 2.90 mm × 1.60 mm body size, surface-mount, lead-free and RoHS-compliant. Thermal resistance R_θJA = 184.7 °C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A2QDRQ1 and MAX40056ATA+T, the INA293A2QDBVRQ1 uniquely combines AEC-Q100 Grade 1 qualification, −4 V to +110 V common-mode operation, and 160-dB DC CMRR - making it the only option qualified for precision 48-V automotive current sensing where ground-referenced recirculation and high-voltage fault tolerance are mandatory.

Availability

INA293A2QDBVRQ1 is available at Aetrix Electronics and suitable for 48-V automotive power distribution, solenoid control, and DC/DC converter protection requiring stable component supply, long-term automotive lifecycle support, and traceable sourcing.

Supply support for INA293A2QDBVRQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive, industrial, and power management ICs.

The INA293-Q1 product line delivers ultra-precise, AEC-Q100-qualified current sensing for next-generation 48-V automotive architectures - designed specifically for high-bandwidth, high-CMRR, and functional safety–compliant current monitoring in solenoids, valves, and DC/DC converters.

FAQ

What is the operating temperature range for the INA293A2QDBVRQ1?

The INA293A2QDBVRQ1 is specified for operation from −40 °C to +125 °C ambient temperature (AEC-Q100 Grade 1), with electrical characteristics guaranteed across this full range. Its offset drift of ±0.05 µV/°C and gain drift of ±10 ppm/°C ensure stable performance in under-hood automotive environments where thermal cycling is severe. The device's thermal resistance (R_θJA = 184.7 °C/W) supports reliable operation on standard FR-4 PCBs without additional heatsinking.

Does the INA293A2QDBVRQ1 support bidirectional current sensing?

No, the INA293A2QDBVRQ1 operates in unidirectional mode only - it measures current flowing from power supply to load, not reverse current. Its architecture is optimized for sourced-current applications such as solenoid drive, valve actuation, and DC/DC converter output monitoring. For bidirectional sensing, TI recommends the INA229-Q1 or similar devices with explicit zero-crossing capability and symmetric offset specifications.

What is the maximum common-mode voltage the INA293A2QDBVRQ1 can survive during fault conditions?

The INA293A2QDBVRQ1 has a survival voltage rating of −20 V to +120 V on its IN+ and IN− pins, verified per AEC-Q100 stress testing. This exceeds its operational common-mode range (−4 V to +110 V) and ensures robustness against load dump, reverse battery, and inductive kickback events in automotive 48-V systems. The device remains functional after exposure and resumes normal operation without latch-up or parametric shift.

How does the 50 V/V gain of the INA293A2QDBVRQ1 affect shunt resistor selection?

With 50 V/V gain, the INA293A2QDBVRQ1 scales a 20-mV differential input to 1 V output - ideal for 2–5 mΩ shunts carrying 4–10 A. For example, a 3-mΩ shunt at 8 A yields 24 mV VSENSE → 1.2 V output, staying within the 0.005–(VS − 0.07) V output swing limits. This gain balances resolution, power loss, and noise floor better than 20 V/V (lower sensitivity) or 100 V/V (reduced dynamic range) for mid-current automotive loads.

Is functional safety documentation available for the INA293A2QDBVRQ1?

Yes, Texas Instruments provides comprehensive functional safety documentation for the INA293A2QDBVRQ1, including FMEDA reports, FIT rate calculation (122 FIT), safety manual, and diagnostic coverage analysis - all aligned with ISO 26262 ASIL-B requirements. These materials are accessible via TI's functional safety portal and support system-level safety case development for automotive ECU and power module applications.