Texas Instruments INA293A5QDBVRQ1

Overview

INA293A5QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified ultra-precise current sense amplifier with 500 V/V fixed gain, −4 V to +110 V common-mode input range, 1.3 MHz bandwidth, ±2 µV max input offset voltage, and 160-dB DC CMRR-designed for high-speed overcurrent protection in 48-V solenoid and valve control systems.

For engineers reviewing the INA293A5QDBVRQ1 datasheet, INA293A5QDBVRQ1 pinout, INA293A5QDBVRQ1 application, or INA293A5QDBVRQ1 equivalent, key selection criteria include its 500 V/V gain accuracy (±0.15% max), −4 V common-mode capability enabling recirculating current measurement in half-bridge topologies, functional safety documentation support, and SOT-23 package compatibility with space-constrained automotive ECUs.

Technical Context

The INA293A5QDBVRQ1 uses a transconductance architecture with current-feedback amplifier topology to achieve 20 µA typical input bias current at 110 V common-mode voltage and enable low-leakage sensing in high-voltage automotive power stages. Its zero-drift input stage delivers ±2 µV max offset and ±0.025 µV/°C max drift across −40°C to +125°C.

Unlike conventional current sense amplifiers, the device operates independently of supply voltage for common-mode range-supporting −4 V to +110 V inputs even with 2.7 V to 20 V supply-and maintains 85-dB AC CMRR at 50 kHz for robust noise rejection in PWM-driven solenoid and DC/DC converter applications.

Key Specifications

Pinout & Package

SOT-23 (DBV) 5-pin package, 2.90 mm × 1.60 mm body size, surface-mount compatible with standard reflow profiles and automotive-grade PCB assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA240A5QDRQ1 and MAX40056ATA+T, the INA293A5QDBVRQ1 uniquely combines −4 V common-mode operation, ±2 µV offset, and 160-dB DC CMRR-making it the only option qualified for precision half-bridge current sensing in ASIL-B automotive subsystems.

Availability

INA293A5QDBVRQ1 is available at Aetrix Electronics and suitable for 48-V automotive power distribution, solenoid control, 48-V DC/DC converter protection, and brake-by-wire valve control requiring stable component supply across extended temperature and lifecycle requirements.

Supply support for INA293A5QDBVRQ1 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 automotive IC design expertise and AEC-Q100 validation infrastructure.

The INA293-Q1 product line was engineered specifically for high-reliability automotive current sensing-addressing the need for ultra-precise, high-bandwidth, and fault-tolerant measurement in 48-V architectures and safety-critical actuation systems.

FAQ

What is the maximum common-mode voltage the INA293A5QDBVRQ1 can withstand during transient conditions?

The INA293A5QDBVRQ1 has a survival voltage rating of −20 V to +120 V, meaning it can withstand short-duration transients outside its operational −4 V to +110 V range without damage or latch-up-critical for handling load dump events in 48-V automotive systems. This rating is validated per AEC-Q100 stress test conditions and supports robust operation in harsh electrical environments where the INA293A5QDBVRQ1 is deployed.

Does the INA293A5QDBVRQ1 support bidirectional current measurement?

No, the INA293A5QDBVRQ1 operates in unidirectional mode only-it measures current flowing from power supply to load, not reverse current. However, its −4 V common-mode capability allows it to accurately sense recirculating current in half-bridge configurations when placed on the low-side of the shunt, as the IN− pin can go 4 V below ground while maintaining linear operation. This behavior is explicitly documented in the INA293A5QDBVRQ1 functional description and enables effective use in motor control freewheeling paths.

How does the 500 V/V gain of the INA293A5QDBVRQ1 impact shunt resistor selection?

The 500 V/V gain enables use of very low-value shunt resistors (e.g., 0.5–2 mΩ) while still generating measurable output voltages-reducing I²R power loss and thermal drift in high-current applications like solenoid drivers. For example, at 100 A and 2 mΩ, the INA293A5QDBVRQ1 produces 100 V output, well within its 20 V supply swing limits. This gain optimizes signal-to-noise ratio without requiring additional amplification stages, directly improving system accuracy and simplifying layout around the INA293A5QDBVRQ1.

Is the INA293A5QDBVRQ1 pin-compatible with other variants in the INA293-Q1 family?

Yes, all INA293-Q1 variants-including INA293A5QDBVRQ1-share identical SOT-23 (DBV) 5-pin packaging and pinout (OUT, GND, IN+, IN−, Vs), enabling drop-in replacement across gain options (20–500 V/V) without PCB redesign. This uniformity simplifies inventory management and design flexibility, allowing engineers to prototype with one gain version and scale production with another while retaining the same footprint, thermal profile, and layout constraints for the INA293A5QDBVRQ1.

What functional safety documentation is provided for the INA293A5QDBVRQ1?

Texas Instruments provides dedicated functional safety documentation for the INA293A5QDBVRQ1, including FMEDA reports, FIT rate calculations (127 failures-in-time), diagnostic coverage analysis, and safety manual guidance for ISO 26262 ASIL-B integration. This documentation is accessible via TI's functional safety portal and supports systematic hardware development processes-enabling direct reuse of safety artifacts when deploying the INA293A5QDBVRQ1 in automotive control modules requiring certified fault tolerance.