Texas Instruments INA216A1YFFR

Overview

INA216A1YFFR from Texas Instruments is a unidirectional, high-side current shunt monitor IC with 25V/V fixed gain, ±30μV max input offset voltage, 1.8V–5.5V common-mode input range, and 13μA quiescent current - enabling precision low-voltage drop sensing in battery-powered systems such as notebook power rails and USB-C PD chargers.

For engineers reviewing the INA216A1YFFR datasheet, INA216A1YFFR pinout, INA216A1YFFR application, or INA216A1YFFR equivalent, this page delivers verified specifications, WCSP-4 package layout, real-world use cases in portable power management, and validated alternative options for design flexibility.

Technical Context

The INA216A1YFFR uses zero-drift auto-zero architecture to achieve ±30μV max input offset voltage and 0.06μV/°C drift, supporting accurate current measurement down to 10mV full-scale shunt voltage. Its common-mode input range (1.8V–5.5V) is derived directly from the IN+ pin, eliminating a dedicated supply rail.

This device operates without external amplification - delivering buffered voltage output with 42Ω output impedance, 20kHz bandwidth (C_L = 10pF), and rail-to-rail swing capability (within 100mV of V+ and 1mV of GND), optimized for direct ADC interfacing in space-constrained applications.

Key Specifications

Pinout & Package

INA216A1YFFR is housed in a 4-bump DSBGA (WCSP-4) package measuring 0.87mm × 0.87mm × 0.33mm (YFF designation), optimized for ultra-compact portable designs. The chip-scale package features solder bumps on bottom side and no exposed pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with INA216A1YFFR, INA215A1YFFR trades precision for lower cost in less demanding applications, while MAX40016AUB+ adds intelligence at the expense of pinout compatibility - making INA216A1YFFR optimal for space-constrained, ultra-low-power, high-accuracy analog-only implementations.

Availability

INA216A1YFFR is available at Aetrix Electronics and suitable for battery fuel gauging, USB-C power delivery monitoring, and point-of-load DC-DC converter sensing requiring stable component supply across high-mix, low-volume production runs.

Supply support for INA216A1YFFR 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 high-accuracy, low-power current sensing in portable and battery-operated systems - emphasizing zero-drift performance, minimal board space, and direct integration with microcontroller ADCs.

FAQ

What is the supply configuration for INA216A1YFFR?

The INA216A1YFFR has no dedicated V_DD pin - it draws power directly from the IN+ pin, which must be maintained between +1.8V and +5.5V. This architecture eliminates an external supply rail but requires the sensed common-mode voltage to meet minimum operating conditions. The INA216A1YFFR's internal regulation ensures stable operation across its full temperature range (–40°C to +125°C) without external decoupling beyond standard 100nF ceramic.

Can INA216A1YFFR measure bidirectional current?

No, the INA216A1YFFR is strictly a unidirectional current shunt monitor - it only supports high-side sensing of current flowing from IN+ to IN−. It lacks internal level-shifting or bipolar output capability required for reverse-current detection. For bidirectional applications, TI recommends the INA226 or INA240 families, which provide true ±V_SENSE input range and signed output encoding - neither feature is present in the INA216A1YFFR design.

What is the maximum shunt voltage the INA216A1YFFR can accurately resolve?

The INA216A1YFFR achieves full-scale output at 200mV below the IN+ voltage, limiting maximum output swing. With 25V/V gain, the largest resolvable differential input is 200mV ÷ 25 = 8mV - but practical resolution is constrained by offset and noise. At ±30μV offset, the device reliably resolves shunt voltages ≥10mV full-scale (0.4% error), making 10mV the effective minimum full-scale shunt drop for precision applications using the INA216A1YFFR.

How does the WCSP-4 package affect thermal performance of INA216A1YFFR?

The YFF (DSBGA-4) package has a junction-to-ambient thermal resistance (θ_JA) of 160°C/W, significantly higher than the RSW (ThinQFN-10) variant (114.9°C/W). This means the INA216A1YFFR requires careful PCB layout - including thermal vias under the die and copper pour on adjacent layers - to maintain junction temperature below 125°C under continuous 13μA operation. No heatsink is needed, but ambient temperature rise must be modeled in compact enclosures.

Is INA216A1YFFR compatible with standard reflow profiles?

Yes, the INA216A1YFFR carries an IPC/JEDEC Level-1 moisture sensitivity rating with peak reflow temperature up to 260°C - fully compatible with standard lead-free (SnAgCu) reflow profiles. Its SNAGCU (tin-silver-copper) bump finish ensures robust solder joint formation on ENIG and OSP PCB finishes. Texas Instruments confirms no pre-bake is required for tape-and-reel packaged INA216A1YFFR units shipped in dry-packed moisture barrier bags.