Texas Instruments INA216A2YFFR

Overview

INA216A2YFFR from Texas Instruments is a unidirectional, high-side current shunt monitor IC with fixed 50V/V gain, ±20μV max input offset voltage, 1.8V to 5.5V common-mode input range, and 13μA quiescent current. It enables precision low-voltage drop current sensing in battery-powered portable electronics where space and power efficiency are critical.

For engineers reviewing the INA216A2YFFR datasheet, INA216A2YFFR pinout, INA216A2YFFR application, or INA216A2YFFR equivalent, this page delivers verified specifications, WCSP-4 package layout, real-world use cases in power management and battery charging, and validated alternative options for design flexibility.

Technical Context

The INA216A2YFFR employs a zero-drift architecture to achieve ±20μV maximum input offset voltage and 0.05 m%/°C gain error drift, enabling accurate sensing down to 10mV full-scale shunt voltage. Its common-mode rejection ratio (CMRR) reaches 108 dB and power-supply rejection (PSRR) matches CMRR due to shared supply-input topology.

This device draws power directly from the IN+ pin-eliminating a dedicated V_CC pin-and operates across –40°C to +125°C. With 10 kHz bandwidth and 0.03 V/μs slew rate, it supports stable DC and low-frequency AC current monitoring without external buffering.

Key Specifications

Pinout & Package

INA216A2YFFR is housed in a 4-bump DSBGA (WCSP-4) package measuring 0.87 mm × 0.87 mm × 0.33 mm, optimized for ultra-compact portable designs. The chip-scale construction eliminates bond wires and reduces parasitic inductance for improved high-frequency stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA216A2YFFR, INA215A2YFFR trades 2.5× higher offset and +12μA IQ for lower unit cost, while MAX40016AUB+ adds supply pin overhead and package area but extends output voltage range-making INA216A2YFFR optimal for space-constrained, single-supply, high-accuracy battery monitoring.

Availability

INA216A2YFFR is available at Aetrix Electronics and suitable for battery fuel gauging, USB power delivery monitoring, and wireless charging receiver designs requiring stable component supply with guaranteed long-term manufacturability.

Supply support for INA216A2YFFR 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-leveraging zero-drift architecture and chip-scale packaging to minimize size and energy overhead.

FAQ

What is the supply configuration for INA216A2YFFR?

The INA216A2YFFR has no dedicated power supply pin. It derives operating power directly from the IN+ pin, which serves as both the high-side shunt connection and the V_CC source. This architecture enforces a minimum common-mode voltage of +1.8V and eliminates the need for an auxiliary supply rail-simplifying layout and reducing component count in single-supply systems. The INA216A2YFFR draws only 13 μA from IN+, minimizing impact on shunt voltage accuracy.

Does INA216A2YFFR require external components for basic operation?

No, the INA216A2YFFR operates autonomously with only the shunt resistor connected between IN+ and IN−. Its integrated output buffer eliminates the need for an external op amp, and its zero-drift core requires no external trimming or calibration. For ESD protection in harsh environments, TI recommends adding 10Ω series resistors and dual zener diodes-but these are optional enhancements, not functional prerequisites. The INA216A2YFFR delivers full specified performance with just the shunt and load.

What is the maximum shunt voltage the INA216A2YFFR can accurately measure?

The INA216A2YFFR supports full-scale differential input voltages up to 20mV at its 50V/V gain setting-corresponding to a 1.0V output at V_IN+ = 4.2V. Due to its ±20μV max input offset, it maintains <0.2% error down to 10mV shunt drop (i.e., 200mV output). At lower differentials (e.g., 5mV), offset contributes >0.4% error-so 10mV is the practical lower bound for high-accuracy measurement. The INA216A2YFFR does not saturate below this; it simply incurs increasing relative offset error.

Can INA216A2YFFR be used in low-side current sensing configurations?

No-the INA216A2YFFR is explicitly designed for high-side sensing only. Its input stage is biased to operate with common-mode voltages from +1.8V to +5.5V, and the IN+ pin doubles as the power supply. Connecting IN+ to ground (as required for low-side shunt placement) prevents internal circuitry from powering up. Attempting low-side use results in no valid output and potential damage if common-mode exceeds GND–0.3V. For low-side monitoring, TI recommends alternatives like the INA199 or INA240 series.

How does the WCSP-4 package of INA216A2YFFR affect PCB layout?

INA216A2YFFR's 0.87 mm × 0.87 mm WCSP-4 package demands precise stencil design and reflow profiling but enables ultra-dense layouts. Its bump-down orientation requires solder mask-defined pads and 0.25 mm pitch routing. Critical layout rules include placing the shunt resistor adjacent to IN+/IN− with Kelvin traces, keeping GND connection short and low-inductance, and avoiding vias under the die. Thermal relief is unnecessary-the package's 76°C/W junction-to-board resistance ensures adequate self-cooling at ≤13 μA power dissipation.