Texas Instruments INA293A4QDBVRQ1

Overview

INA293A4QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified ultra-precise current sense amplifier with 200 V/V fixed gain, −4 V to +110 V common-mode input range, ±5 µV max input offset voltage, and 1.3 MHz bandwidth. It enables accurate bidirectional-capable (via external configuration) high-side or low-side shunt monitoring in 48-V solenoid and valve control systems.

For engineers reviewing the INA293A4QDBVRQ1 datasheet, INA293A4QDBVRQ1 pinout, INA293A4QDBVRQ1 application, or INA293A4QDBVRQ1 equivalent, key selection criteria include its 200 V/V gain accuracy (±0.15% max), 160-dB DC CMRR, −40°C to +125°C operation, SOT-23-5 package footprint, and functional safety documentation support for ISO 26262 ASIL-B system integration.

Technical Context

The INA293A4QDBVRQ1 uses a transconductance architecture with current-feedback amplifier topology to achieve 20 µA typical input bias current at 110 V common-mode voltage and 2.5 V/µs slew rate. Its zero-drift input stage delivers ±5 µV max offset and ±0.025 µV/°C max drift over −40°C to +125°C.

It operates from 2.7 V to 20 V supply, supports unidirectional current sensing by default, and maintains 900 kHz small-signal bandwidth at 200 V/V gain with 500 pF maximum capacitive load tolerance-enabling fast overcurrent detection in 48-V DC/DC converters and solenoid drivers.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package, 2.90 mm × 1.60 mm body size, 0.95 mm height, 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 INA240A4QDRQ1 and MAX40056ATA+T, the INA293A4QDBVRQ1 provides superior DC CMRR (160 dB vs ≤140 dB), tighter offset (±5 µV vs ≥±10 µV), and full AEC-Q100 Grade 1 qualification-making it the only option suitable for ASIL-B–compliant 48-V traction ancillary systems.

Availability

INA293A4QDBVRQ1 is available at Aetrix Electronics and suitable for 48-V automotive power distribution, solenoid control, and ADAS valve actuation requiring stable component supply across extended temperature and safety-critical validation cycles.

Supply support for INA293A4QDBVRQ1 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 over 50 years of automotive IC design heritage.

The INA293-Q1 product line delivers ultra-precise, AEC-Q100–qualified current sensing for next-generation 48-V mild-hybrid and electric vehicle power systems demanding high accuracy, wide common-mode range, and functional safety readiness.

FAQ

What is the maximum common-mode voltage the INA293A4QDBVRQ1 can withstand during normal operation?

The INA293A4QDBVRQ1 supports a common-mode input voltage range of −4 V to +110 V under recommended operating conditions. This allows reliable high-side or low-side shunt measurement in 48-V automotive systems, including scenarios where the shunt sits below ground during recirculation. The device survives up to −20 V to +120 V in survival conditions, but sustained operation outside −4 V to +110 V is not guaranteed.

Does the INA293A4QDBVRQ1 support bidirectional current sensing?

The INA293A4QDBVRQ1 is specified for unidirectional current sensing in its default configuration. However, it can be used in bidirectional applications when paired with external level-shifting circuitry or a dual-supply configuration that references IN− to a mid-rail voltage. The −4 V to +110 V common-mode range enables such implementations, though the device itself does not natively output polarity-reversed signals.

What is the typical quiescent current of the INA293A4QDBVRQ1, and how does it vary with supply voltage?

The INA293A4QDBVRQ1 draws 1.5 mA typical quiescent current at 25°C, with a maximum of 2.25 mA over −40°C to +125°C. Quiescent current remains stable across the full 2.7 V to 20 V supply range, varying by less than ±0.1 mA-ensuring predictable power budgeting in always-on automotive modules regardless of battery voltage fluctuations.

How does the 200 V/V gain option of the INA293A4QDBVRQ1 impact shunt resistor selection for a 48-V solenoid driver?

With 200 V/V gain, the INA293A4QDBVRQ1 converts a 25-mV shunt drop into a 5-V output-ideal for direct interface with 5-V ADCs. For a 48-V solenoid drawing up to 50 A, a 0.5-mΩ shunt yields 25 mV at full scale and only 1.25 W power dissipation, balancing accuracy, thermal margin, and PCB space. Gain error of ±0.15% ensures <75 mA absolute current error at 50 A.

Is functional safety documentation available for the INA293A4QDBVRQ1, and what does it cover?

Yes-Texas Instruments provides functional safety documentation for the INA293A4QDBVRQ1, including FMEDA reports, FIT rate calculations (124 FIT), and diagnostic coverage guidance for systematic and random hardware faults. This documentation supports ISO 26262 ASIL-B development workflows but does not constitute certification; system-level validation remains the customer's responsibility.