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Texas Instruments INA214AIRSWR
- Part No.:
- INA214AIRSWR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-UFQFN
- Datasheet:
-
INA214AIRSWR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 10UQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,040
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Product details
Overview
INA214AIRSWR from Texas Instruments is a voltage-output, bidirectional current-shunt monitor with zero-drift architecture, designed for high-accuracy low- or high-side current sensing in power rails up to 26 V common-mode. It features 100 V/V fixed gain, ±60 µV maximum input offset voltage (RTI), 0.5 µV/°C max offset drift, 30 kHz bandwidth, and operates from 2.7 V to 26 V supply with ≤100 µA quiescent current. It enables 10-mV full-scale shunt measurements in battery chargers and telecom power management.
For engineers reviewing the INA214AIRSWR datasheet, INA214AIRSWR pinout, INA214AIRSWR application, or INA214AIRSWR equivalent, this page delivers verified specifications, validated SC70/UQFN package mapping, confirmed pin functions for RSW (10-pin Thin UQFN), real-world use cases in power delivery systems, and two technically documented alternative parts with functional and application-level distinctions.
Technical Context
The INA214AIRSWR implements a zero-drift chopper-stabilized amplifier topology to achieve ultra-low offset and drift, supporting precise bidirectional current measurement across shunts at –0.1 V to 26 V common-mode voltage-fully independent of its 2.7–26 V supply. Its internal matched resistor network (RINT = 10 kΩ) sets the 100 V/V gain without external components.
It uses a differential input stage referenced to an externally supplied REF pin, enabling flexible output level shifting (e.g., to match ADC input range). The device draws only 65–100 µA supply current and maintains CMRR ≥105 dB over temperature, making it suitable for noisy, wide-input-range industrial and portable power monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Fixed Gain | 100 V/V - Enables direct scaling of 10-mV shunt drop to 1-V output, simplifying ADC interface without gain-setting resistors. |
| Input Offset Voltage (max) | ±60 µV RTI - Supports accurate sub-100-mA current sensing with low-value shunts (e.g., 10 mΩ at 10 mA yields 100 µV signal). |
| Offset Drift (max) | 0.5 µV/°C - Ensures <±0.5 mV total offset shift over –40°C to +125°C, critical for thermal-stable battery fuel gauging. |
| Common-Mode Range | –0.1 V to 26 V - Allows high-side sensing on 24-V industrial rails or low-side sensing near ground, even with supply as low as 2.7 V. |
| Bandwidth | 30 kHz - Captures fast load transients in DC-DC converter output monitoring and overcurrent protection response. |
| Supply Current (max) | 100 µA - Enables always-on current monitoring in energy-sensitive IoT nodes and portable devices. |
| Operating Temperature | –40°C to +125°C - Qualified for under-hood automotive power modules and industrial motor drives. |
Pinout & Package
INA214AIRSWR is packaged in a 10-pin Thin UQFN (RSW) with 1.80 mm × 1.40 mm body size and 0.5-mm pitch. Thermal performance includes RθJA = 107.3°C/W and RθJB = 18.7°C/W, supporting compact PCB layouts with minimal heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Analog power supply | Accepts 2.7–26 V; powers internal amplifier and reference buffer; requires 0.1-µF bypass capacitor close to pin. |
| GND | Analog ground | Return path for supply and signal; must be connected to system ground plane with low-inductance trace. |
| IN+ | Non-inverting input | Connects to supply side of shunt; dual pins (2 & 3) must be tied together to reduce noise pickup and parasitic impedance. |
| IN− | Inverting input | Connects to load side of shunt; dual pins (4 & 5) must be tied together for matched input routing and CMRR optimization. |
| REF | Reference input | Sets output common-mode level; accepts 0 V to V+; buffered reference required if driven via resistive divider. |
| OUT | Analog output | Voltage-output stage drives ≥10-kΩ loads; swing is (V+) – 0.2 V to GND + 0.05 V over full temperature range. |
| NC (pins 1, 7) | No internal connection | May be left floating or tied to GND; no electrical function; improves mechanical stability when grounded. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional current sensing | Supports both sourcing and sinking load currents via polarity-sensitive output relative to REF, enabling battery charge/discharge monitoring. |
| Zero-drift architecture | Eliminates 1/f noise and long-term drift, delivering stable 10-mV full-scale accuracy without periodic calibration in field-deployed equipment. |
| High CMRR (≥105 dB) | Maintains measurement integrity in presence of rail noise (e.g., switching regulator ripple), reducing need for additional filtering stages. |
| Low quiescent current (≤100 µA) | Permits integration into always-on subsystems such as smart battery packs and energy-harvesting sensors without compromising runtime. |
| Wide supply range (2.7–26 V) | Operates directly from single Li-ion, 12-V automotive, or 24-V industrial rails-no LDO or charge pump required. |
Applications
| Battery Fuel Gauging | Telecom Power Monitoring |
|---|---|
Use Scenario: Real-time bidirectional current tracking in lithium-ion battery packs for state-of-charge (SoC) and health (SoH) estimation. IC Role / Device Role / Timing Role: Current-shunt monitor measuring charge/discharge current through sense resistor placed between battery and load/FET. Use Value: ±60 µV offset enables detection of <10 mA current with <0.1% error at 10-A full scale, improving SoC accuracy over lifetime. |
Use Scenario: Input/output current supervision in 48-V telecom rectifiers and distributed power architectures. IC Role / Device Role / Timing Role: High-side current sensor on primary DC bus, feeding analog input of microcontroller or PMBus controller. Use Value: 26-V common-mode range allows direct sensing on 48-V rails with 2.7-V logic supply, eliminating level-shifting circuitry. |
| USB-C PD Power Delivery | Industrial Motor Drive Protection |
Use Scenario: Accurate current limiting and fault detection in USB-C power delivery sink applications with variable 5–20 V input. IC Role / Device Role / Timing Role: Low-side current monitor in synchronous buck controller feedback loop for cycle-by-cycle current regulation. Use Value: 30-kHz bandwidth supports fast overcurrent response (<33 µs), meeting USB-PD 3.1 fault timing requirements. |
Use Scenario: Phase current sensing in BLDC motor inverters for field-oriented control (FOC) and stall detection. IC Role / Device Role / Timing Role: High-side shunt monitor on each half-bridge leg, referenced to isolated gate driver supply. Use Value: –0.1 V to 26 V common-mode range accommodates shoot-through margin and PWM edge transients without saturation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA213AIRSWR | 50 V/V gain, ±100 µV max offset, 80 kHz bandwidth | Better suited for higher full-scale shunt drops (>20 mV); lower gain reduces sensitivity to PCB layout errors. | Select when measuring larger currents with higher-value shunts where 100-V/V gain causes output saturation. |
| INA215AIDR | 75 V/V gain, SC70-6 package (6-pin), ±100 µV max offset, 40 kHz bandwidth | Smaller footprint but single IN+/IN− pins; lower CMRR (100 dB typ) and no dual-input option for noise rejection. | Choose for space-constrained designs where dual-input noise immunity is not required and 75× gain matches system scaling. |
Compared with INA214AIRSWR, INA213AIRSWR offers higher bandwidth and lower gain for robust high-current sensing, while INA215AIDR trades dual-input noise immunity and thermal performance (higher RθJA) for board area savings-neither is pin-compatible, requiring layout revision.
Availability
INA214AIRSWR is available at Aetrix Electronics and suitable for battery management systems, telecom power supplies, USB-C PD controllers, and industrial motor drive protection requiring stable component supply across extended temperature and long production lifecycles.
Supply support for INA214AIRSWR 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 INA21x series was engineered specifically for high-accuracy, low-power current sensing in space- and energy-constrained applications-from portable electronics to industrial power conversion-leveraging zero-drift amplifiers to eliminate calibration overhead.
FAQ
What is the maximum common-mode voltage supported by the INA214AIRSWR?
The INA214AIRSWR supports a common-mode input voltage range of –0.1 V to 26 V across its IN+ and IN– pins, independent of its 2.7–26 V supply voltage. This allows high-side sensing on 24-V industrial rails or low-side sensing near ground. The specification is guaranteed over the full –40°C to +125°C operating temperature range and applies to all versions (A/B/C) of the INA214AIRSWR.
Does the INA214AIRSWR require external gain-setting resistors?
No, the INA214AIRSWR has a factory-trimmed fixed gain of 100 V/V achieved via internal matched thin-film resistors (RINT = 10 kΩ). No external resistors are needed for gain configuration, reducing component count, layout area, and potential matching errors-critical for production consistency in the INA214AIRSWR.
Can the INA214AIRSWR measure bidirectional current?
Yes, the INA214AIRSWR supports true bidirectional current measurement. Its output voltage is referenced to the externally applied REF pin: when current flows in one direction, VOUT > VREF; when reversed, VOUT < VREF. This enables precise charge/discharge tracking in battery applications using the same INA214AIRSWR device.
What package type does the INA214AIRSWR use, and how many pins does it have?
The INA214AIRSWR uses the RSW package: a 10-pin Thin UQFN with 1.80 mm × 1.40 mm body size and 0.5-mm pitch. It features dual IN+ (pins 2,3) and dual IN– (pins 4,5) terminals for improved noise immunity and thermal symmetry-distinct from the 6-pin SC70 variant used by other INA21x members. This physical configuration is integral to the INA214AIRSWR's performance specification.
How does the REF pin function in the INA214AIRSWR?
The REF pin on the INA214AIRSWR sets the output common-mode voltage level. With REF tied to mid-supply (e.g., VS/2), the output swings symmetrically around that point. It accepts 0 V to VS, enabling level-shifting to match ADC input ranges. Driving REF with a buffered reference is required if sourced from a high-impedance divider-unbuffered connections degrade CMRR and introduce gain error in the INA214AIRSWR.
INA214AIRSWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 10-UFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- Single-Ended
- Slew Rate:
- 0.4V/µs
- Gain Bandwidth Product:
- 30 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 28 µA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 65µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 26 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-UQFN (1.8x1.4)
INA214AIRSWR FAQ
1.How can I place an order for INA214AIRSWR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA214AIRSWR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for INA214AIRSWR reliable?
The price and inventory of INA214AIRSWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA214AIRSWR is usually 5 days.
3.What payment methods are accepted for INA214AIRSWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA214AIRSWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA214AIRSWR?
INA214AIRSWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA214AIRSWR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for INA214AIRSWR?
For technical support, including INA214AIRSWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA214AIRSWR requirements.
6.How does Aetrix verify that INA214AIRSWR is sourced from the original manufacturer or authorized distributors?
All INA214AIRSWR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that INA214AIRSWR meets industry standards.
7.What is the process for return or replacement of INA214AIRSWR?
All INA214AIRSWR units undergo pre-shipment inspection (PSI). If there is an issue with INA214AIRSWR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The INA214AIRSWR part is unused and in its original packaging.
Return procedure for INA214AIRSWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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