Texas Instruments INA197AIDBVR

Overview

INA197AIDBVR from Texas Instruments is a precision current shunt monitor IC designed for bidirectional high-side and low-side current sensing across shunt resistors in industrial, automotive, and power management systems. It delivers 50 V/V fixed gain, supports −16 V to +80 V common-mode input voltage range independent of its 2.7 V to 18 V supply, achieves ≤3.0% total output error over temperature, and operates up to 300 kHz bandwidth - enabling accurate real-time current feedback in battery chargers and telecom power supplies.

For engineers reviewing the INA197AIDBVR datasheet, INA197AIDBVR pinout, INA197AIDBVR application, or INA197AIDBVR equivalent, key selection criteria include its SOT-23-5 package compatibility, guaranteed 300 kHz bandwidth at 50 V/V gain, −40°C to +125°C extended temperature operation, and validated performance under negative/positive common-mode conditions beyond supply rail.

Technical Context

The INA197AIDBVR implements a patented dual-amplifier front-end architecture: amplifier A1 activates during negative common-mode (−16 V to 0 V), A2 during positive common-mode (0 V to +80 V), with seamless transition ensuring continuous operation. Its internal current-conversion topology eliminates reliance on precision resistor matching for common-mode rejection - achieving ≥100 dB CMR over temperature without external trimming.

This architecture enables true rail-to-rail common-mode operation while maintaining 50 V/V gain accuracy, 2.5 μV/°C offset drift, and <2 μs settling time (1%) - making it suitable for closed-loop current control in welding equipment and motor drives where fast transient response and wide voltage margin are critical.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm footprint, surface-mount, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA197AIDBVR, INA197AIDBVT offers identical performance in a different packaging format for volume manufacturing, while INA240A1DDBVR trades lower quiescent current and extended negative common-mode capability for improved accuracy and bandwidth - requiring careful evaluation of system-level trade-offs in power budget, layout space, and measurement fidelity requirements.

Availability

INA197AIDBVR is available at Aetrix Electronics and suitable for battery chargers, telecom power modules, and automotive BMS requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for INA197AIDBVR 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 INA19x family was engineered specifically for high-voltage, high-accuracy current sensing in harsh environments - targeting applications where traditional op-amp-based solutions fail due to limited common-mode range or temperature drift.

FAQ

What is the maximum common-mode voltage the INA197AIDBVR can handle?

The INA197AIDBVR supports a common-mode input voltage range of −16 V to +80 V, independent of its supply voltage. This means it can accurately sense current across shunts connected to negative rails (e.g., −12 V systems) or high-positive rails (e.g., 48 V telecom buses) without damage or performance degradation - a key capability confirmed in TI's SBOS307G datasheet Section 7.3 and Figure 6.

Does the INA197AIDBVR require external calibration for accurate current measurement?

No, the INA197AIDBVR does not require external calibration. It delivers ≤3.0% total output error over −40°C to +125°C with no user adjustment needed. Its patented dual-amplifier architecture and factory-trimmed 50 V/V gain eliminate the need for system-level gain or offset trimming - verified in Electrical Characteristics Table 7.5 and Typical Characteristics Figure 5.

Can the INA197AIDBVR be used for bidirectional current sensing?

Yes, the INA197AIDBVR supports bidirectional current sensing. Its differential input (VIN+ and VIN−) accepts both polarities of shunt voltage drop, and its output swings above and below mid-supply depending on direction - confirmed by the "Negative and Positive Common-Mode Voltage" schematic label and low-V_SENSE behavior analysis in Section 8.4.2 of the datasheet.

What is the recommended supply decoupling for the INA197AIDBVR?

Texas Instruments recommends a 0.1 μF ceramic capacitor placed as close as possible to the V+ (Pin 5) and GND (Pin 2) pins of the INA197AIDBVR. This minimizes high-frequency noise coupling and ensures stability - explicitly stated in Section 8.3.1 ("Basic Connection") and supported by layout guidelines in Section 11.2 of the SBOS307G datasheet.

Is the INA197AIDBVR pin-compatible with other devices in the INA19x family?

The INA197AIDBVR uses Pinout #2 (as defined in Device Comparison Table, Section 5), making it pin-compatible with INA196 and INA198 in the same SOT-23-5 package. However, it is not pin-compatible with INA194 (Pinout #1); swapping requires PCB layout revision - confirmed in Section 5 and Pin Configuration Table 6 of the official datasheet.