The Texas Instruments INA216A1YFFR is a high-precision, low-power unidirectional current shunt monitor with Zero-Drift architecture. Featuring a fixed 25V/V gain, ±30μV max offset voltage, and a common-mode range of 1.8V–5.5V, it enables accurate current sensing in high-side configurations. Housed in a tiny WCSP-4 package (1mm²), it draws just 13μA quiescent current, ideal for space-constrained, battery-powered designs. Operating over -40°C to 125°C, it suits portable electronics, power management systems, industrial automation, and IoT devices, offering robust performance with 90dB CMRR and ESD protection (2.5kV HBM).
Texas Instruments INA216A1YFFR's Features
Texas Instruments' INA216A1YFFR is a high-precision, small-form-factor unidirectional current shunt monitor belonging to the Zero-Drift series. It is designed for current sensing in low-power, high-common-mode voltage environments. Below are its core features:
1. Electrical Characteristics
Gain and Precision
-
Fixed Gain: 25V/V (exclusive to the A1 model).
-
Gain Error: ±0.2% (maximum), with a typical value as low as ±0.01%, ensuring high-accuracy current measurement.
- Input Offset Voltage (RTI): ±30μV (maximum), with a temperature drift coefficient of 0.06μV/°C (typical), ideal for tiny signal detection.
Common-Mode Range and Power Supply
Bandwidth and Response
-
Bandwidth: 20kHz (A1 model), meeting medium-speed signal acquisition needs.
-
Output Swing: Near rail-to-rail (V+ - 0.3V to GND + 0.002V), compatible with ADC inputs.
2. Physical Characteristics and Packaging
-
Package Type: WCSP-4 (YFF) chip-scale package, extremely compact for space-constrained designs (e.g., portable devices).
-
Pin Functions:
-
IN+/-: Differential inputs connected to the shunt resistor.
-
OUT: Buffered voltage output, requiring no additional operational amplifier.
-
GND: Ground.
-
ESD Protection: 2.5kV human-body model (HBM), enhancing electrostatic discharge resistance.
3. Reliability and Environmental Adaptability
-
Temperature Range: -40°C to +125°C, supporting industrial-grade applications.
-
Thermal Characteristics (YFF Package):
-
Long-Term Stability: Zero-drift architecture suppresses temperature drift and long-term offset, ideal for precision measurements.
4. Application Scenarios
-
Portable Electronics: Power management and battery charging monitoring in laptops and smartphones.
-
Industrial and Communications: Current sensing in telecom equipment and power modules.
-
Low-Power Systems: Scenarios requiring high common-mode rejection ratio (CMRR 90dB, typical) and low quiescent current.
5. Key Parameter Comparison (INA216 Series)
| Model |
Gain (V/V) |
Bandwidth (kHz) |
Offset Voltage (μV, max) |
Typical Quiescent Current (μA) |
Packaging |
| INA216A1 |
25 |
20 |
±30 |
13 |
WCSP-4 (YFF) |
| INA216A2 |
50 |
10 |
±20 |
13 |
WCSP-4/ThinQFN |
| INA216A3 |
100 |
5 |
±20 |
13 |
WCSP-4/ThinQFN |
| INA216A4 |
200 |
2.5 |
±20 |
13 |
WCSP-4/ThinQFN |
Texas Instruments INA216A1YFFR's Applications
Texas Instruments INA216A1YFFR is a high-precision, low-power unidirectional current shunt monitor. Leveraging its key features (such as high common-mode rejection ratio, small form factor, and wide temperature range), it finds extensive applications in the following fields:
1. Portable Electronic Devices
- Laptops and Tablets
Used for battery charging management, power path control, and system power consumption monitoring. It accurately detects battery charge/discharge currents to optimize energy efficiency and extend battery life.
- Smartphones and Wearable Devices
Enables high-side current sensing in compact spaces, supporting standby current monitoring in low-power modes to enhance battery life.
- Handheld Devices (e.g., Gaming Consoles, E-readers)
Monitors power rail currents in real time to help dynamically adjust power consumption and balance performance with battery usage.
2. Power Management and Battery Systems
- Battery Chargers and Adapters
Monitors charging loop currents to enable overcurrent protection and charging status feedback (e.g., switching between constant current/constant voltage phases), suitable for single-cell or multi-cell battery charger designs.
- Uninterruptible Power Supplies (UPS) and Backup Power Systems
Detects charge/discharge currents in battery packs, supporting battery state-of-health (SOH) monitoring and state-of-charge (SOC) estimation.
- Distributed Power Systems (e.g., Multi-rail Power Supplies)
Monitors load currents on each power rail under high common-mode voltages (1.8V–5.5V) to ensure system power stability.
3. Industrial and Communication Equipment
- Telecom Equipment and Network Infrastructure
Used in power modules of switches and routers to monitor backplane or board-level current consumption, supporting hot-swap control and fault diagnosis.
- Industrial Automation and Sensor Nodes
Operates stably in industrial environments (-40°C to 125°C), detecting currents in motor drives, solenoids, or sensors for equipment condition monitoring and energy efficiency optimization.
- Embedded Systems and IoT Devices
Its low-power characteristics make it suitable for battery-powered IoT sensor nodes, reducing energy consumption over long-term operation while meeting high-precision current measurement requirements.
4. Consumer Electronics and Home Appliances
- Smart Home Devices (e.g., Smart Plugs, Thermostats)
Monitors operating currents of home appliances in real time for energy consumption statistics and abnormal power usage detection (e.g., overload or short-circuit alerts).
- Audio Equipment and Video Surveillance
Monitors current in power amplifier modules of audio systems to prevent overload damage; optimizes power management in security cameras for long standby times.
5. Automotive Electronics (Specific Scenarios)
- In-Vehicle Electronic Modules
Used for current detection in low-voltage automotive systems (e.g., 12V vehicle power supplies), such as in-car chargers and infotainment system power management, supporting wide temperature operation.
- Battery Management Systems (BMS)
Aids in detecting charge/discharge currents of vehicle battery packs, particularly suitable for monitoring low-voltage battery systems (e.g., start-stop batteries).
6. Test and Measurement Equipment
- Precision Instruments and Laboratory Equipment
Serves as a high-precision current detection module integrated into multimeters, power testers, or data acquisition systems for precise measurement of microcurrents (e.g., μA-level).
- Research, Development, and Prototyping
Its small form factor (WCSP-4) and ease of use (no additional op-amps required) make it ideal for rapid prototyping, simplifying circuit layout.
Application Scenarios Driven by Core Advantages
- High-Precision Requirements: Medical device power monitoring, metrology instrument current calibration, etc., relying on its ±30μV offset voltage and ±0.2% gain error.
- Space-Constrained Designs: Portable devices or high-density PCB layouts, where the WCSP-4 chip-scale package significantly saves board space.
- Low-Power Priorities: Battery-powered systems, where 13μA quiescent current extends device runtime and minimizes energy waste.
- Harsh Environments: Industrial or automotive applications, supported by the -40°C to 125°C temperature range and ESD protection (2.5kV HBM) for reliability.
Texas Instruments INA216A1YFFR's Symbol and Footprint
Texas Instruments INA216A1YFFR's Pinouts
Pinout Summary for Design
| Pin |
Signal |
Direction |
Key Use Case |
| 1 |
IN+ |
Input |
High side of shunt resistor |
| 2 |
IN- |
Input |
Low side of shunt resistor |
| 3 |
VCC |
Power |
Supply voltage + output (buffered) |
| 4 |
GND |
Ground |
System ground reference |
Layout Best Practices
- Shunt Placement: Place the shunt resistor close to the INA216 to minimize parasitic resistance/inductance in the current path.
- Short Traces: Keep traces from IN+/- to the shunt as short and direct as possible to reduce noise pickup.
- Power Decoupling: Ensure the VCC decoupling capacitor is within 5mm of the device.
- Ground Plane: Use a solid ground plane under the package to improve thermal and noise performance.
Texas Instruments INA216A1YFFR's Category-Current Shunt Monitor
A Current Shunt Monitor (CSM) is an essential analog component designed to measure bidirectional or unidirectional currents in electrical systems by detecting the voltage drop across a precision shunt resistor. Operating on the principle of Ohm’s Law (V = I × R), these devices amplify the small differential voltage across the shunt using a high-precision amplifier, enabling accurate current monitoring, power management, and fault detection. Key features of CSMs include high common-mode rejection ratio (CMRR) to suppress noise from high-voltage power rails, low input offset voltage for precision at low currents, and wide supply voltage ranges to accommodate diverse systems. They are critical in applications requiring real-time current sensing, such as battery management systems (BMS), motor drives, telecom power supplies, and portable electronics, where efficiency, reliability, and space constraints are paramount.
Modern CSMs often integrate advanced technologies like Zero-Drift or chopper-stabilized amplifiers to minimize temperature drift and long-term offset, ensuring consistent performance across -40°C to 125°C industrial temperature ranges. Low-power designs with quiescent currents in the microampere range are essential for battery-powered devices, while compact packages (e.g., WCSP, QFN) cater to space-constrained layouts. Additionally, features like rail-to-rail output, ESD protection, and high bandwidth enhance their versatility in both low-power and high-speed systems.
Texas Instruments’ INA216A1YFFR exemplifies these advancements. As a unidirectional CSM with a fixed 25V/V gain, it offers ±30μV maximum offset voltage and 90dB CMRR, ensuring precise current measurements in high-side configurations with common-mode voltages up to 5.5V. Housed in a tiny 1mm² WCSP-4 package and consuming just 13μA quiescent current, it is ideal for portable electronics, IoT sensors, and industrial automation. Its Zero-Drift architecture and -40°C to 125°C operating range make it robust for harsh environments, while ESD protection (2.5kV HBM) and simple integration (no external amplifiers needed) further solidify its role as a leading solution for high-accuracy, low-power current sensing.
INA216A1YFFR's Manufacturer-Texas Instruments
Texas Instruments (TI) has established itself as a leading innovator in the Current Shunt Monitor (CSM) domain, driving advancements in precision, efficiency, and integration for over two decades. The company’s portfolio spans a wide range of CSM solutions, catering to diverse markets from consumer electronics to industrial and automotive systems. TI’s core achievements in this field revolve around its groundbreaking analog technologies, including Zero-Drift amplifiers, high common-mode rejection ratio (CMRR) designs, and low-power architectures, which have set industry standards for accuracy and reliability.
TI’s CSM lineup, such as the INAxx series (e.g., INA169, INA219, INA240, INA282), exemplifies its technical prowess. For instance, the INA169 offers ultra-low offset voltage (±15μV) and high bandwidth (250kHz), making it ideal for precision instrumentation. The INA219 integrates a digital interface (I2C/SMBus) for easy communication with microcontrollers, simplifying power monitoring in embedded systems. Meanwhile, the INA240 stands out with a wide common-mode voltage range (±80V), enabling robust current sensing in high-voltage industrial applications. TI also pioneered bidirectional current monitoring with devices like the INA282, supporting both sourcing and sinking current measurements in motor drives and battery systems.
A key differentiator of TI’s CSMs is their low-power design, critical for battery-powered devices. Models like the INA219 consume as little as 40μA of quiescent current, while the INA226 offers power-down modes to extend runtime in portable electronics. TI has also prioritized compact form factors, such as WCSP and DSBGA packages, allowing engineers to integrate CSMs into space-constrained designs like wearables and IoT sensors. Additionally, TI’s CSMs often include built-in diagnostics, such as overcurrent and overtemperature alerts, enhancing system safety in automotive and industrial environments.
In summary, TI’s dominance in the CSM market stems from its relentless focus on precision, low power, and scalability, supported by a vast ecosystem of evaluation modules, reference designs, and technical support. The INA216A1YFFR embodies these achievements: as a Zero-Drift, high-precision CSM with a tiny WCSP-4 package (1mm²) and 13μA quiescent current, it exemplifies TI’s ability to deliver cutting-edge solutions that balance performance, power, and size. Whether enabling energy-efficient battery management in smartphones or reliable current sensing in industrial automation, TI continues to shape the future of current monitoring technology.
INA216A1YFFR alternative parts: INA216A4YFFR, INA216A2YFFR
| Hide Shared Attributes |
 |
 |
 |
| Part Number |
INA216A1YFFR +BOM |
INA216A4YFFR +BOM |
INA216A2YFFR +BOM |
| Manufacturer: |
Texas Instruments |
Texas Instruments |
Texas Instruments |
| Description: |
IC CURRENT SHUNT MONITOR 4DSBGA |
IC CURRENT SHUNT MONITOR 4DSBGA |
IC CURRENT SHUNT MONITOR 4DSBGA |
| Lifecycle Status: |
ACTIVE (Last Updated: 3 days ago) |
ACTIVE (Last Updated: 6 days ago) |
ACTIVE (Last Updated: 3 days ago) |
| Factory Lead Time: |
6 Weeks |
6 Weeks |
6 Weeks |
| Contact Plating: |
Copper, Silver, Tin |
Copper, Silver, Tin |
Copper, Silver, Tin |
| Mount: |
Surface Mount |
Surface Mount |
Surface Mount |
| Mounting Type: |
Surface Mount |
Surface Mount |
Surface Mount |
| Package / Case: |
4-UFBGA, DSBGA |
4-UFBGA, DSBGA |
4-UFBGA, DSBGA |
| Number of Pins: |
4 |
4 |
4 |
| Operating Temperature: |
-40°C~125°C |
-40°C~125°C |
-40°C~125°C |
| Packaging: |
Tape & Reel (TR) |
Tape & Reel (TR) |
Tape & Reel (TR) |
| Series: |
Zero-Drift |
Zero-Drift |
Zero-Drift |
| JESD-609 Code: |
e1 |
e1 |
e1 |
| Pbfree Code: |
yes |
yes |
yes |
| Part Status: |
Active |
Active |
Active |
| Moisture Sensitivity Level (MSL): |
1 (Unlimited) |
1 (Unlimited) |
1 (Unlimited) |
| Number of Terminations: |
4 |
4 |
4 |
| ECCN Code: |
EAR99 |
EAR99 |
EAR99 |
| Terminal Finish: |
Tin/Silver/Copper (Sn/Ag/Cu) |
Tin/Silver/Copper (Sn/Ag/Cu) |
Tin/Silver/Copper (Sn/Ag/Cu) |
| Terminal Position: |
BOTTOM |
BOTTOM |
BOTTOM |
| Terminal Form: |
BALL |
BALL |
BALL |
| Peak Reflow Temperature (Cel): |
260 |
260 |
260 |
| Time@Peak Reflow Temperature-Max (s): |
NOT SPECIFIED |
- |
NOT SPECIFIED |
| Base Part Number: |
INA216 |
INA216 |
INA216 |
| Function: |
Current Monitor |
Current Monitor |
Current Monitor |
| Qualification Status: |
Not Qualified |
- |
Not Qualified |
| Number of Channels: |
1 |
1 |
1 |
| Max Supply Voltage: |
5.5V |
5.5V |
5.5V |
| Min Supply Voltage: |
1.8V |
1.8V |
1.8V |
| Nominal Supply Current: |
30μA |
30μA |
30μA |
| Accuracy: |
±0.01% |
±0.01% |
±0.05% |
| Amplifier Type: |
OPERATIONAL AMPLIFIER |
OPERATIONAL AMPLIFIER |
OPERATIONAL AMPLIFIER |
| Common Mode Rejection Ratio: |
90 dB |
90 dB |
90 dB |
| Input Offset Voltage (Vos): |
100μV |
75μV |
75μV |
| Voltage Gain: |
27.96dB |
46.02dB |
33.98dB |
| Power Supply Rejection Ratio (PSRR): |
90dB |
90dB |
90dB |
| Sensing Method: |
High-Side |
High-Side |
High-Side |
| Input Bias Current: |
3μA |
3μA |
3μA |
| Height: |
625μm |
625μm |
625μm |
| Length: |
1.2mm |
1.2mm |
1.2mm |
| Width: |
1mm |
1mm |
1mm |
| Thickness: |
1.2mm |
1.2mm |
1.2mm |
| RoHS Status: |
ROHS3 Compliant |
ROHS3 Compliant |
ROHS3 Compliant |
| Lead Free: |
Lead Free |
Lead Free |
Lead Free |
| Radiation Hardening: |
- |
No |
- |
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