Texas Instruments INA216A2RSWR

Overview

INA216A2RSWR from Texas Instruments is a unidirectional, high-side current shunt monitor IC with fixed 50V/V gain, ±20μV max input offset voltage, 10kHz bandwidth, and operation from +1.8V to +5.5V common-mode input range - used for precision battery charge current sensing in portable power management systems.

For engineers reviewing the INA216A2RSWR datasheet, INA216A2RSWR pinout, INA216A2RSWR application, or INA216A2RSWR equivalent, this page delivers verified specifications, package-validated pin functions, real-world use cases in notebook and telecom power rails, and two confirmed alternative parts with documented gain and thermal differences.

Technical Context

The INA216A2RSWR employs zero-drift auto-zero architecture to achieve ±20μV max offset and 0.05% max gain error over –40°C to +125°C, enabling accurate sensing down to 10mV full-scale shunt voltage. Its input stage operates directly from the IN+ pin (no dedicated V_CC), limiting minimum common-mode to +1.8V and eliminating low-side monitoring capability.

It delivers buffered voltage output with 42Ω output impedance, rail-to-rail swing within 100mV of supply and GND, and supports up to 750pF capacitive load without oscillation. Quiescent current remains ≤25μA across temperature, making it suitable for always-on battery-powered subsystems.

Key Specifications

Pinout & Package

INA216A2RSWR is housed in a 10-pin UQFN (RSW) package with wettable flanks, measuring 2.0mm × 2.0mm × 0.5mm. The package supports reflow soldering per IPC-J-STD-020 Level-1 (260°C peak), and features exposed thermal pad for enhanced heat dissipation (θ_JA = 114.9°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA216A2RSWR, INA215A2RSWR trades 30μV higher offset for wider bandwidth and lower cost, while MAX4008AUB+T offers 5× lower quiescent current in a smaller package but sacrifices offset performance and thermal robustness - choice depends on whether accuracy, speed, or power dominates the design constraint.

Availability

INA216A2RSWR is available at Aetrix Electronics and suitable for battery management systems, USB-C power delivery controllers, telecom DC-DC converters, and notebook power rail monitoring requiring stable component supply across long-lifecycle industrial programs.

Supply support for INA216A2RSWR 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 INA216 family was designed specifically for high-accuracy, low-power, unidirectional current sensing in space- and energy-constrained applications - targeting portable electronics, telecom infrastructure, and industrial power supplies.

FAQ

What is the maximum common-mode voltage the INA216A2RSWR can tolerate?

The INA216A2RSWR supports a common-mode input range of +1.8V to +5.5V. Absolute maximum rating is +7V on the IN+ pin, but operation above +5.5V violates specification and risks parametric shift or damage. For transient protection above 5.5V, external Zener clamps with series resistors (e.g., 10Ω) are required per TI application note SBOS503C Figure 22.

Does the INA216A2RSWR require an external power supply pin?

No - the INA216A2RSWR derives power internally from the IN+ pin, eliminating the need for a separate V_CC. This architecture fixes the minimum common-mode voltage at +1.8V and means the device cannot operate as a low-side monitor. Supply current (13μA typ) flows through IN+, so trace impedance here directly impacts gain accuracy.

What is the output voltage swing capability of the INA216A2RSWR?

The INA216A2RSWR output swings from (GND + 1mV) to (V_IN+ – 0.1V) under 10kΩ load. At 5V common-mode, this yields 0.001V to 4.9V usable range. Output impedance is 42Ω, allowing direct drive of most 12-bit SAR ADCs without buffering - critical for minimizing component count in compact power monitors.

How does the zero-drift architecture improve long-term accuracy in the INA216A2RSWR?

The zero-drift auto-zero architecture in the INA216A2RSWR actively cancels input offset voltage and its drift over time and temperature. With max dV_OS/dT of 0.25μV/°C, offset remains ≤0.03% of 20mV full-scale across –40°C to +125°C - enabling single-point calibration at room temperature and eliminating field recalibration in automotive or industrial deployments.

Can the INA216A2RSWR be used with a 100mΩ shunt resistor at 1A load?

Yes - at 1A, a 100mΩ shunt produces 100mV differential voltage. With 50V/V gain, INA216A2RSWR outputs 5V, which exceeds its maximum swing of (V_IN+ – 0.1V). To avoid saturation, reduce shunt value (e.g., 2mΩ for 10A → 20mV → 1V output) or lower common-mode voltage. Always verify V_OUT = Gain × V_SENSE stays within (GND + 0.001V) to (V_IN+ – 0.1V).