Texas Instruments INA196AIDBVT

Overview

INA196AIDBVT from Texas Instruments is a precision current shunt monitor IC designed for bidirectional high-side and low-side current sensing across shunt resistors at common-mode voltages from −16 V to +80 V, independent of its 2.7–18 V supply. It delivers 20 V/V fixed gain, 500 kHz bandwidth, ±2.2% total output error over temperature, and operates from −40°C to +125°C in a 5-pin SOT-23 package - enabling accurate real-time current feedback in battery protection circuits, DC/DC converter monitoring, and industrial power supplies.

For engineers reviewing the INA196AIDBVT datasheet, INA196AIDBVT pinout, INA196AIDBVT application, or INA196AIDBVT equivalent, key selection criteria include its wide common-mode range, low quiescent current (900 μA max), guaranteed gain accuracy, SOT-23 thermal performance (R_θJA = 221.7°C/W), and compatibility with negative/positive rail sensing in safety-critical power systems.

Technical Context

The INA196AIDBVT implements a patented dual-amplifier front-end architecture: amplifier A1 activates for negative common-mode voltages (−16 V to 0 V), while A2 handles positive ranges (0 V to +80 V), ensuring seamless transition and stable operation across the full input range. Its internal 5 kΩ ±30% input impedance and current-to-voltage conversion topology eliminate reliance on precision external resistor matching for common-mode rejection.

This architecture achieves 80–94 dB CMR (100–120 dB over temperature) and supports fast current control loops via 500 kHz bandwidth - critical for closed-loop regulation in switching power supplies and motor drivers where signal fidelity and phase margin (>40°) directly impact stability.

Key Specifications

Pinout & Package

INA196AIDBVT is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for high-density PCB layouts and thermal dissipation in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA196AIDBVR, the INA196AIDBVT offers identical performance in a smaller-order packaging format, while INA240A1DDBVR provides superior accuracy and speed at the cost of stricter supply requirements - making INA196AIDBVT the optimal choice for cost-sensitive, volume-deployed industrial power monitors requiring proven reliability and flexible supply operation.

Availability

INA196AIDBVT is available at Aetrix Electronics and suitable for motor drive current monitoring, battery protection circuitry, and DC/DC converter output monitoring requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial OEMs.

Supply support for INA196AIDBVT 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 amplifiers and power management ICs.

The INA19x family was engineered specifically for high-voltage, high-accuracy current sensing in power conversion and protection systems - delivering robust performance across automotive, industrial, and telecom applications where reliability and wide common-mode operation are essential.

FAQ

What is the maximum common-mode voltage supported by the INA196AIDBVT?

The INA196AIDBVT supports a common-mode input voltage range of −16 V to +80 V, enabling direct sensing on both negative-ground and high-positive-rail systems without external level-shifting circuitry. This specification is guaranteed across the full operating temperature range (−40°C to +125°C) and is independent of the device's 2.7–18 V supply voltage - making INA196AIDBVT suitable for 48 V battery systems, telecom power shelves, and industrial motor drives.

Does the INA196AIDBVT require external gain-setting resistors?

No, the INA196AIDBVT features factory-trimmed fixed gain of 20 V/V and requires no external resistors to set gain. Its internal laser-trimmed resistor network ensures ±1% gain error at 25°C and ±2% over temperature - eliminating calibration steps, reducing BOM count, and improving long-term stability compared to discrete op-amp current sense solutions. The INA196AIDBVT is part of the pin-compatible INA193–INA198 family, where gain variants (50 V/V, 100 V/V) are implemented in separate part numbers.

Can the INA196AIDBVT be used for bidirectional current sensing?

Yes, the INA196AIDBVT supports bidirectional current sensing through its ability to operate with negative common-mode voltages down to −16 V. When the shunt voltage polarity reverses (e.g., during battery charging vs. discharging), the output voltage swings correspondingly around the mid-supply point - provided the output stage is biased appropriately. Its dual-amplifier architecture ensures consistent behavior across both polarities, making INA196AIDBVT well-suited for battery protection ICs and regenerative braking monitoring.

What is the recommended power supply decoupling for the INA196AIDBVT?

Texas Instruments recommends a 0.1 μF ceramic capacitor placed as close as possible to the V+ (Pin 3) and GND (Pin 2) pins of the INA196AIDBVT to ensure stability and reject high-frequency supply noise. For systems with noisy or high-impedance supplies - such as switcher outputs or long PCB traces - an additional 1–10 μF bulk capacitor should be added in parallel. Proper decoupling maintains the specified 500 kHz bandwidth and prevents oscillation, especially when driving capacitive loads exceeding 10 nF.

How does the INA196AIDBVT handle low differential input voltages below 20 mV?

At differential input voltages (V_SENSE) below 20 mV, the INA196AIDBVT exhibits degraded accuracy depending on common-mode voltage: output error increases significantly in the 0 V ≤ V_CM ≤ V_S region, with typical V_OUT peaking near 300 mV at V_SENSE = 0 mV. For reliable operation, design targets ≥20 mV shunt drops - corresponding to ≥100 mV full-scale for 20 V/V gain. The INA196AIDBVT datasheet defines all specifications for V_SENSE ≥ 20 mV, and this condition must be maintained in production designs.