Texas Instruments INA197AIDBVRG4

Overview

INA197AIDBVRG4 from Texas Instruments is a precision current shunt monitor IC with 50 V/V fixed gain, −16 V to +80 V common-mode input range, 300 kHz bandwidth, ±2.2% total output error over temperature, and 900 μA max quiescent current. It operates from a single +2.7 V to +18 V supply and delivers voltage output proportional to sensed shunt voltage in high-side or low-side current measurement circuits for battery management and motor control.

For engineers reviewing the INA197AIDBVRG4 datasheet, INA197AIDBVRG4 pinout, INA197AIDBVRG4 application, or INA197AIDBVRG4 equivalent, key selection criteria include its wide common-mode tolerance, guaranteed accuracy at elevated temperatures, SOT-23-5 package footprint, and compatibility with negative-rail sensing in automotive power distribution systems.

Technical Context

The INA197AIDBVRG4 implements a patented dual-amplifier front-end architecture that enables operation across −16 V to +80 V common-mode voltages while powered from a single 2.7–18 V rail-without requiring matched external resistors. Amplifier A1 activates for negative common-mode conditions; A2 dominates above ground.

Its 50 V/V gain is laser-trimmed and stable over −40°C to +125°C. Output swing is specified to within 100 mV of V+ and 50 mV above GND under load, supporting direct interfacing with 3.3 V or 5 V ADCs without level-shifting.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, 0.95 mm height, gull-wing leads, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar current shunt monitoring applications.

Compared with INA240A1IDR and MAX4080TASA+, the INA197AIDBVRG4 provides the best balance of wide supply range (2.7–18 V), guaranteed accuracy over extended temperature, and proven reliability in automotive and industrial deployments-making it the preferred choice for mission-critical current sensing where supply flexibility and long-term stability are essential.

Availability

INA197AIDBVRG4 is available at Aetrix Electronics and suitable for automotive battery management, industrial motor control, telecom power shelf protection, and lithium-ion charger safety monitoring requiring stable component supply and long-lifecycle support.

Supply support for INA197AIDBVRG4 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The INA19x family was designed specifically for high-accuracy, wide common-mode current sensing in harsh environments-targeting applications where traditional amplifiers fail due to supply limitations or common-mode voltage excursions.

FAQ

What is the maximum common-mode voltage the INA197AIDBVRG4 can handle?

The INA197AIDBVRG4 supports a common-mode input voltage range of −16 V to +80 V. This allows it to accurately monitor current in high-side configurations on 48 V telecom systems, withstand automotive load-dump transients up to +80 V, and operate safely during cold-crank events down to −16 V-all while powered from a single 2.7–18 V supply. The specification is guaranteed across the full −40°C to +125°C operating temperature range.

Does the INA197AIDBVRG4 require external resistors for gain setting?

No, the INA197AIDBVRG4 has a factory-laser-trimmed fixed gain of 50 V/V and requires no external gain-setting resistors. Its internal precision resistor network is trimmed to ±1% matching, eliminating layout sensitivity and component count. Users connect only the shunt resistor, power supply bypass capacitor, and output load-reducing design complexity and improving long-term stability compared to discrete amplifier solutions.

Can the INA197AIDBVRG4 be used for bidirectional current sensing?

No, the INA197AIDBVRG4 is unidirectional-it outputs a positive voltage proportional to the magnitude of current flowing from VIN+ to VIN−. For bidirectional sensing, TI recommends the INA226 or INA240 series, which provide signed output or dedicated high/low-side configurations. The INA197AIDBVRG4's architecture is optimized for unidirectional accuracy and wide common-mode rejection, not polarity detection.

What is the output drive capability of the INA197AIDBVRG4?

The INA197AIDBVRG4 output stage is designed to source current only, with a typical short-circuit current of ~400 mA. It drives capacitive loads up to 10 nF without oscillation and maintains linearity into 100 kΩ loads. It cannot sink current; therefore, pull-down resistors are required if interfacing with open-drain logic or level-shifted inputs. Output swing is specified to within 100 mV of V+ and 50 mV above GND under full load.

Is the INA197AIDBVRG4 pin-compatible with other devices in the INA19x family?

Yes, the INA197AIDBVRG4 uses Pinout #2 (as defined in TI's SBOS307G datasheet) and shares identical SOT-23-5 (DBV) pin assignments with INA196 and INA198. This allows direct substitution among the 20 V/V (INA196), 50 V/V (INA197), and 100 V/V (INA198) variants without PCB changes-enabling flexible gain selection during prototyping or production ramp.