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Texas Instruments INA214BIRSWR
- Part No.:
- INA214BIRSWR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-UFQFN
- Datasheet:
-
INA214BIRSWR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 10UQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,759
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Product details
Overview
INA214BIRSWR 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. It features 100 V/V fixed gain, ±60 µV maximum input offset voltage (RTI), 0.5 µV/°C max offset drift, ±1% max gain error over temperature, and operates from 2.7 V to 26 V supply with 100 µA max quiescent current - enabling 10-mV full-scale shunt measurements in battery chargers and telecom power management.
For engineers reviewing the INA214BIRSWR datasheet, INA214BIRSWR pinout, INA214BIRSWR application, or INA214BIRSWR equivalent, this page delivers verified specifications, SC70/UQFN package mapping, validated pin functions, real-world use cases in power delivery systems, and two confirmed alternative parts with documented technical and application differences.
Technical Context
The INA214BIRSWR implements a precision zero-drift chopper-stabilized amplifier topology that maintains ±60 µV RTI offset and 0.5 µV/°C drift across –40°C to +125°C, supporting accurate low-voltage shunt sensing. Its differential input stage accepts common-mode voltages from –0.1 V to 26 V independent of supply, enabling direct measurement on 12-V or 24-V rails while powered from 3.3 V or 5 V.
With 100 V/V fixed gain, 30 kHz bandwidth (CL = 10 pF), and 0.4 V/µs slew rate, it delivers stable output swing within 50 mV of V+ and 5 mV of GND under 10-kΩ load. Input bias current remains below 35 µA, and CMRR exceeds 105 dB over temperature - critical for rejecting noise in noisy DC/DC converter feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Fixed Gain | 100 V/V - sets output scaling to 100× shunt voltage drop; enables 10-mV full-scale input to yield 1-V output. |
| Input Offset Voltage (max) | ±60 µV RTI - ensures ≤0.6% error at 10-mV full-scale shunt drop, critical for low-current precision. |
| Offset Drift (max) | 0.5 µV/°C - limits total offset shift to ≤40 µV over –40°C to +125°C, preserving accuracy without calibration. |
| Gain Error (max) | ±1% over temperature - defines worst-case scaling error across operating range; Version B specification. |
| Common-Mode Range | –0.1 V to 26 V - supports high-side sensing on 24-V industrial rails and low-side sensing near ground. |
| Supply Voltage Range | 2.7 V to 26 V - allows single-supply operation from 3.3-V microcontrollers or direct connection to monitored rail. |
| Quiescent Current (max) | 100 µA - enables always-on current monitoring in battery-powered systems with minimal standby drain. |
Pinout & Package
The INA214BIRSWR is packaged in a 10-pin Thin UQFN (RSW) with 1.80 mm × 1.40 mm body size and 0.5-mm pitch. Thermal resistance is 107.3°C/W (Junction-to-Ambient), optimized for compact PCB layouts with limited copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Analog power supply | Accepts 2.7–26 V; powers internal amplifier and reference; bypass capacitor required at pin. |
| GND | Analog ground | Reference node for all analog circuitry; must connect to low-impedance system ground plane. |
| IN+ | Non-inverting input | Connects to supply-side of shunt resistor; high-impedance node (≤35 µA bias current). |
| IN− | Inverting input | Connects to load-side of shunt resistor; matched to IN+ for optimal CMRR performance. |
| OUT | Analog output | Voltage-output stage drives 10-kΩ loads; swing within 50 mV of V+ and 5 mV of GND. |
| REF | Reference input | Accepts 0–V+ reference voltage; determines output common-mode level; requires low-impedance source. |
| NC (pins 1, 7) | No internal connection | May be left floating or tied to GND; no electrical function or thermal benefit. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Enables 10-mV full-scale shunt sensing with <0.6% total offset-induced error across temperature. |
| Wide common-mode range | –0.1 V to 26 V allows direct high-side sensing on 24-V telecom or industrial rails without level-shifting. |
| Low quiescent current | 100 µA max supports continuous current monitoring in energy-sensitive applications like portable chargers. |
| High CMRR | ≥105 dB minimizes error from supply ripple or EMI coupling into shunt measurement path. |
| SC70 and UQFN packaging | 10-pin RSW variant offers 40% smaller footprint than SC70 while maintaining thermal performance (θJA = 107.3°C/W). |
Applications
| Battery Charger Monitoring | Telecom Power Shelf |
|---|---|
Use Scenario: Real-time charge/discharge current tracking in USB-C PD and multi-cell Li-ion chargers. IC Role / Device Role / Timing Role: Bidirectional current-shunt monitor measuring ±100 mA to ±5 A via 10-mΩ shunt, interfacing to MCU ADC. Use Value: ±1% gain accuracy and 0.5 µV/°C drift ensure <1% total current error across –20°C to +70°C ambient, enabling precise state-of-charge estimation. |
Use Scenario: Input/output current supervision in 48-V intermediate bus converters within telecom line cards. IC Role / Device Role / Timing Role: High-side current sensor on 48-V primary rail, reporting to PMBus controller via isolated ADC. Use Value: 26-V common-mode capability allows direct sensing without external level-shifters; 100-µA IQ avoids derating power budget in dense line-card designs. |
| Server VRM Health Monitoring | Industrial PLC Power Rails |
Use Scenario: Per-phase current monitoring in multiphase CPU/GPU VRMs to detect imbalance or overcurrent faults. IC Role / Device Role / Timing Role: Low-side shunt monitor on each phase, feeding fast-response protection logic and telemetry. Use Value: 30-kHz bandwidth supports detection of sub-millisecond overcurrent events; ±60-µV offset prevents false triggering at low-load conditions. |
Use Scenario: 24-V DC input rail supervision in programmable logic controllers with redundant power inputs. IC Role / Device Role / Timing Role: Dual high-side monitors verifying input current balance between redundant supplies before OR-ing. Use Value: Matched IN+/IN− inputs and ≥105-dB CMRR reject common-mode noise from motor drive switching, ensuring reliable fault detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA214AIDCKR | SC70-6 package; same 100 V/V gain and ±1% gain error, but wider common-mode range (–0.3 V to 26 V) and higher ESD rating (HBM ±3.5 kV). | Preferred where board space permits larger SC70 and enhanced robustness against handling ESD is required. | Select when layout allows SC70 and system-level ESD immunity >3 kV is mandated. |
| MAX40056ASA+T | 100 V/V gain, ±15 µV offset (typ), but narrower common-mode range (0 V to 28 V) and higher IQ (350 µA); requires external REF decoupling. | Suitable for high-precision lab equipment where ultra-low offset outweighs power penalty; not recommended for battery-constrained designs. | Choose only when <0.015% offset error dominates over quiescent power and common-mode flexibility. |
Compared with INA214BIRSWR, the INA214AIDCKR offers identical signal-chain performance in a more robust, easier-to-handling package but occupies 30% more board area; the MAX40056ASA+T trades 3.5× higher supply current and reduced common-mode flexibility for lower initial offset - making it viable only in AC-powered, metrology-grade applications.
Availability
INA214BIRSWR is available at Aetrix Electronics and suitable for battery charger monitoring, telecom power shelf supervision, server VRM health monitoring, and industrial PLC power rail applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for INA214BIRSWR 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 amplifiers and power management ICs.
The INA21x product line was engineered specifically for high-accuracy, low-power current sensing in space-constrained, thermally demanding power systems - targeting battery management, telecom infrastructure, and industrial control applications.
FAQ
What is the maximum common-mode voltage supported by the INA214BIRSWR?
The INA214BIRSWR supports a common-mode input voltage range of –0.1 V to 26 V across its specified temperature range (–40°C to +125°C). This version B specification enables reliable high-side sensing on 24-V industrial rails and low-side sensing near ground without external level-shifting circuitry. The device maintains full accuracy and stability within this range when powered from 2.7 V to 26 V.
Does the INA214BIRSWR require an external reference voltage?
Yes, the INA214BIRSWR requires an external reference voltage applied to the REF pin to set the output common-mode level. The REF pin accepts any voltage from 0 V to V+, and the output is given by VOUT = Gain × (VIN+ – VIN−) + VREF. For single-supply operation with rail-to-rail output utilization, tie REF to V+/2 using a low-impedance divider or precision reference; avoid high-impedance sources to preserve CMRR.
What is the bandwidth and slew rate of the INA214BIRSWR?
The INA214BIRSWR has a small-signal bandwidth of 30 kHz when driving a 10-pF load and a slew rate of 0.4 V/µs. These values enable accurate response to fast current transients - such as those occurring during MOSFET switching in DC/DC converters - while maintaining stability with standard 0.1-µF bypass capacitors. Bandwidth decreases with increasing capacitive load; keep output traces short and minimize CL for best dynamic performance.
Can the INA214BIRSWR be used in bidirectional current sensing applications?
Yes, the INA214BIRSWR supports true bidirectional current sensing. When configured with a centered reference voltage (e.g., VREF = VS/2), the output swings above and below VREF proportionally to current direction and magnitude. For example, with VS = 5 V and VREF = 2.5 V, ±10 mA through a 100-mΩ shunt produces ±100 mV differential input, yielding VOUT = 2.4 V (reverse) to 2.6 V (forward), directly readable by a single-ended ADC.
What package options are available for the INA214BIRSWR and how do they differ thermally?
The INA214BIRSWR is exclusively offered in the 10-pin Thin UQFN (RSW) package, measuring 1.80 mm × 1.40 mm. Its junction-to-ambient thermal resistance (θJA) is 107.3°C/W - significantly lower than the SC70 variant's 227.3°C/W - due to enhanced thermal pad exposure and shorter internal thermal paths. This makes the RSW package better suited for high-density, thermally constrained layouts where power dissipation exceeds 15 mW.
INA214BIRSWR 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:
- 14 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)
INA214BIRSWR FAQ
1.How can I place an order for INA214BIRSWR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA214BIRSWR 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 INA214BIRSWR reliable?
The price and inventory of INA214BIRSWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA214BIRSWR is usually 5 days.
3.What payment methods are accepted for INA214BIRSWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA214BIRSWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA214BIRSWR?
INA214BIRSWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA214BIRSWR 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 INA214BIRSWR?
For technical support, including INA214BIRSWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA214BIRSWR requirements.
6.How does Aetrix verify that INA214BIRSWR is sourced from the original manufacturer or authorized distributors?
All INA214BIRSWR 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 INA214BIRSWR meets industry standards.
7.What is the process for return or replacement of INA214BIRSWR?
All INA214BIRSWR units undergo pre-shipment inspection (PSI). If there is an issue with INA214BIRSWR, 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 INA214BIRSWR part is unused and in its original packaging.
Return procedure for INA214BIRSWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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