Texas Instruments INA216A4RSWR

Overview

INA216A4RSWR from Texas Instruments is a unidirectional, high-side current shunt monitor IC with 200V/V fixed gain, ±20μV max input offset voltage, ±0.2% max gain error, and operation from +1.8V to +5.5V common-mode input range. It delivers buffered voltage output for direct ADC interfacing in battery-powered power management systems.

For engineers reviewing the INA216A4RSWR datasheet, INA216A4RSWR pinout, INA216A4RSWR application, or INA216A4RSWR equivalent, this page provides verified specifications, thermal performance data, package mapping to ThinQFN-10 (RSW), real-world error analysis examples, and validated alternative options for precision current sensing in space-constrained portable electronics.

Technical Context

The INA216A4RSWR uses zero-drift auto-zero architecture to achieve ±20μV max offset and 0.1 μV/°C typical drift, enabling accurate sensing down to 10mV full-scale shunt drop. Its common-mode rejection ratio (CMRR) is 90–108 dB across –40°C to +125°C, and power-supply rejection (PSRR) matches CMRR due to supply derivation from IN+.

This device operates without a dedicated V_CC pin-power is sourced directly from the IN+ input, limiting minimum common-mode voltage to +1.8V and precluding low-side sensing. Bandwidth is 2.5 kHz at C_LOAD = 10 pF, and output swing reaches within 100 mV of V₊ and 1 mV above GND under 10 kΩ load.

Key Specifications

Pinout & Package

INA216A4RSWR is housed in a 10-pin ThinQFN (RSW) package with wettable flanks, 2.0mm × 2.0mm footprint, 0.5mm pitch, and exposed thermal pad. The package supports automated optical inspection (AOI) and offers θ_JA = 114.9°C/W and θ_JB = 21.4°C/W for board-level thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA216A4RSWR, INA210A4IDCKR trades offset performance for wider common-mode range and smaller size, while MAX40016ATA+T sacrifices bandwidth and offset accuracy for ultra-small packaging-neither is pin-compatible, and both require layout revision and recalibration.

Availability

INA216A4RSWR is available at Aetrix Electronics and suitable for smartphone battery management, notebook CPU power delivery, USB-C power delivery analyzers, and industrial 4–20mA loop diagnostics requiring stable component supply and long-term lifecycle assurance.

Supply support for INA216A4RSWR 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 series was designed specifically for ultra-low-power, high-accuracy current sensing in portable and battery-operated systems-emphasizing minimal offset, rail-to-rail output, and chip-scale integration without external components.

FAQ

What is the maximum common-mode voltage the INA216A4RSWR can tolerate?

The INA216A4RSWR supports a common-mode input range of +1.8V to +5.5V. Absolute maximum rating is +7V on the supply (IN+) pin, but operation beyond +5.5V violates specification limits and risks parametric degradation. For transient protection above 5.5V, external zener-based clamping with 10Ω series resistors is recommended per TI Application Note SBOS503C Figure 22.

Does the INA216A4RSWR require an external power supply pin?

No-the INA216A4RSWR has no dedicated V_CC pin. It draws power directly from the IN+ input, which serves as both the high-side shunt connection and the supply node. This architecture eliminates a separate supply rail but constrains minimum common-mode voltage to +1.8V and prohibits low-side sensing configurations.

Can the INA216A4RSWR be used with a 2mΩ shunt resistor at 10A full-scale current?

Yes. With 10A full-scale current and a 2mΩ shunt, differential input voltage is 20mV. At 200V/V gain, the INA216A4RSWR produces a 4V output-within its specified output swing (GND + 1mV to V_IN+ – 100mV). Total error remains ≤0.45% per TI Example 1, confirming suitability for high-accuracy applications.

What is the thermal performance of the RSW package in reflow and operation?

The INA216A4RSWR in ThinQFN-10 (RSW) package has MSL Level-1 rating (260°C peak reflow, unlimited floor life) and θ_JA = 114.9°C/W. Under 13μA quiescent current and no output load, junction temperature rise is negligible; with 10kΩ load and 4V output, power dissipation remains <2mW, ensuring safe operation even in sealed enclosures.

How does the zero-drift architecture improve accuracy compared to standard amplifiers?

The INA216A4RSWR's auto-zero architecture continuously corrects input offset and 1/f noise, delivering ±20μV max offset and 0.1 μV/°C drift-over 3× better than conventional CMOS amplifiers. This enables reliable 10mV full-scale sensing with <0.1% error across –40°C to +125°C, eliminating need for system-level offset calibration in production.