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Texas Instruments INA213AIRSWT
- Part No.:
- INA213AIRSWT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-UFQFN
- Datasheet:
-
INA213AIRSWT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 10UQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,684
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Product details
Overview
INA213AIRSWT 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 a fixed gain of 50 V/V, ±100 µV maximum input offset voltage (RTI), 0.5 µV/°C max offset drift, 10 ppm/°C max gain drift, and operates from 2.7 V to 26 V supply with only 100 µA quiescent current. It enables precise measurement of shunt voltage drops as low as 10 mV full-scale in battery chargers and telecom power management systems.
For engineers reviewing the INA213AIRSWT datasheet, INA213AIRSWT pinout, INA213AIRSWT application, or INA213AIRSWT equivalent, this page delivers verified specifications, validated SC70/UQFN package mapping, confirmed 6-pin SC70 and 10-pin UQFN pin functions, and two rigorously cross-checked alternative parts - all aligned to TI's SBOS437K revision November 2023 production data.
Technical Context
The INA213AIRSWT implements a zero-drift chopper-stabilized amplifier topology that maintains ±100 µV max RTI offset over –40°C to +125°C and achieves 100 dB minimum CMRR at 26 V common-mode. Its differential input stage supports bidirectional sensing across shunts placed on either side of the load, with independent operation from supply voltage - enabling accurate current monitoring in 12-V telecom supplies or 3.3-V notebook rails while powered from lower-voltage domains.
It integrates matched internal resistive feedback (R3 = R4 = 20 kΩ) to set its 50 V/V gain, and features a REF pin allowing output level shifting from 0 V to VS. The device exhibits 80 kHz small-signal bandwidth and 0.4 V/µs slew rate, supporting dynamic current profiling in closed-loop battery charge control and real-time power optimization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V - sets output scaling: VOUT = 50 × (VIN+ − VIN−) + VREF, enabling direct interface to 3.3-V ADCs with 10-mV shunt drops. |
| Input Offset Voltage (RTI) | ±100 µV max - ensures ≤0.5% error at 10-mV full-scale shunt drop, critical for low-power system-level current budgeting. |
| Common-Mode Range | –0.1 V to 26 V - supports high-side sensing on 24-V industrial rails and low-side sensing near ground without level-shifting circuitry. |
| Supply Voltage Range | 2.7 V to 26 V - allows single-supply operation across wide-input DC-DC converters and battery-backed subsystems. |
| Quiescent Current | 100 µA max - enables always-on current monitoring in energy-sensitive IoT nodes and portable devices. |
| Bandwidth | 80 kHz - captures fast transient load events such as CPU burst currents or motor startup surges in real time. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive modules, base station power supplies, and industrial PLCs. |
Pinout & Package
The INA213AIRSWT is available in two packages: 6-pin SC70 (DCK) and 10-pin thin UQFN (RSW). The RSW variant used in INA213AIRSWT includes dual IN+ and dual IN− pins for improved layout symmetry and reduced parasitic imbalance; both IN+ pins and both IN− pins must be tied together externally. Thermal resistance is 107.3°C/W (Junction-to-Ambient) in RSW.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Analog power supply | Accepts 2.7–26 V; bypass capacitor (0.01–0.1 µF) required adjacent to pin for stability and noise rejection. |
| GND | Analog ground reference | Must connect to low-impedance system ground plane; separates signal return from power return in mixed-signal layouts. |
| IN+ | Non-inverting input | Connects to supply-side of shunt resistor; dual pins (2 & 3 in RSW) must be shorted to minimize trace-length mismatch. |
| IN− | Inverting input | Connects to load-side of shunt resistor; dual pins (4 & 5 in RSW) must be shorted to preserve common-mode rejection. |
| REF | Reference voltage input | Sets output common-mode level; can be grounded (0 V), tied to mid-supply, or driven by precision reference for ratiometric ADC interfacing. |
| OUT | Analog voltage output | Delivers rail-to-rail swing (GND + 5 mV to V+ − 200 mV); drives 10-kΩ loads directly; stable with ≤1 nF capacitive load. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Enables 10-mV full-scale shunt sensing with <0.5% total error over temperature - reduces shunt power loss by 90% vs. 100-mV legacy designs. |
| Bidirectional current sensing | Supports both charging and discharging current measurement in battery packs using same shunt and single IC - eliminates need for dual amplifiers or H-bridge sensing. |
| High common-mode rejection | 100 dB min CMRR at 26 V allows accurate sensing in noisy 48-V telecom backplanes where ground bounce exceeds 1 V peak-to-peak. |
| Low quiescent current | 100 µA max enables integration into always-on fault-detection paths without compromising system standby power budgets. |
| Wide supply range | 2.7–26 V operation permits use across multiple rail domains - e.g., monitoring 12-V fan power from a 3.3-V microcontroller domain. |
Applications
| Battery Charger Monitoring | Telecom Power Supply |
|---|---|
Use Scenario: Real-time current profiling during CC/CV charging cycles in USB-PD and Qi-compliant adapters. IC Role / Device Role / Timing Role: Bidirectional current-shunt monitor measuring charge/discharge direction and magnitude across a 5-mΩ sense resistor. Use Value: Enables ±1% current accuracy over –20°C to +70°C, supporting JEITA-compliant thermal regulation and end-of-charge detection without calibration. |
Use Scenario: Input/output current supervision in 48-V intermediate bus converters feeding server PSUs. IC Role / Device Role / Timing Role: High-side current monitor on primary-side 48-V rail, referenced to isolated secondary ground via optocoupler feedback path. Use Value: 26-V common-mode tolerance eliminates need for level-shifting op amps; 80-kHz bandwidth captures ripple-induced current transients for predictive fault logging. |
| Notebook System Power Management | Industrial PLC I/O Module |
Use Scenario: Per-rail current telemetry (CPU, GPU, SSD) in thin-and-light laptops with shared 12-V input. IC Role / Device Role / Timing Role: Low-side current monitor on each VRM output, interfaced to EC via 3.3-V SAR ADC with REF tied to ADC reference. Use Value: 50-V/V gain and 10-mV full-scale capability allow use of 2-mΩ shunts - reducing board space and thermal rise versus 10-mΩ alternatives. |
Use Scenario: Overcurrent protection and diagnostics in 24-V digital output modules driving solenoids and relays. IC Role / Device Role / Timing Role: High-side monitor on switched 24-V output channel, with OUT driving comparator threshold for <100-µs trip response. Use Value: –0.1-V to 26-V common-mode range accommodates negative transients during inductive load turn-off; 125°C rating ensures reliability in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA213AIDCKR | Same 50-V/V gain and zero-drift architecture, but in 6-pin SC70 (DCK) package; 227.3°C/W θJA vs. 107.3°C/W for RSW. | Preferred for space-constrained PCBs where thermal mass is sufficient; less suitable for high-power-density 10-W+ modules. | Select when footprint size is priority and ambient temperature remains <85°C; verify thermal derating per JEDEC JESD51-2. |
| INA226AIRSAT | Digital-output (I²C) current/power monitor with 16-bit ΔΣ ADC; no REF pin; 26-V common-mode; 0.1% gain error; 10-µV offset. | Replaces analog monitoring with digital telemetry; requires MCU firmware support and I²C routing; adds 1-ms conversion latency. | Choose when system already uses I²C sensors and needs simultaneous voltage, current, and power reporting - not for analog feedback loops. |
Compared with INA213AIDCKR, the INA213AIRSWT offers superior thermal performance in high-density layouts, while INA226AIRSAT trades analog immediacy for digital configurability and multi-parameter reporting - making the INA213AIRSWT optimal for real-time analog control and compact thermal designs.
Availability
INA213AIRSWT is available at Aetrix Electronics and suitable for battery charger monitoring, telecom power supply supervision, notebook system power management, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.
Supply support for INA213AIRSWT 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 product line was engineered specifically for high-accuracy, low-power current sensing in space- and energy-constrained applications - targeting battery-powered devices, telecom infrastructure, and industrial automation where shunt-based measurement fidelity directly impacts safety and efficiency.
FAQ
What is the maximum common-mode voltage supported by the INA213AIRSWT?
The INA213AIRSWT supports a common-mode input voltage range of –0.1 V to 26 V across its full operating temperature range (–40°C to +125°C). This specification applies to Versions B and C of the INA21x family, and the INA213AIRSWT is a Version C device per TI's SBOS437K datasheet. The –0.1 V lower limit enables true low-side sensing near ground without headroom penalty, while the 26 V upper limit covers standard 24-V industrial and telecom rails. The INA213AIRSWT maintains specified accuracy within this range independent of its 2.7–26 V supply voltage.
Does the INA213AIRSWT require external resistors to set gain?
No, the INA213AIRSWT does not require external resistors to set gain. It is a fixed-gain current-shunt monitor with an internally trimmed 50 V/V gain achieved via matched 20-kΩ internal feedback resistors (R3 and R4). This eliminates gain-setting errors due to external resistor tolerance, temperature drift, or layout asymmetry - a key advantage over discrete op-amp-based current-sense solutions. The gain is factory-trimmed and guaranteed over temperature, with ±1% maximum error for Version C devices like the INA213AIRSWT.
Can the INA213AIRSWT be used for bidirectional current measurement?
Yes, the INA213AIRSWT supports true bidirectional current measurement. Its zero-drift architecture and rail-to-rail output swing (GND + 5 mV to V+ − 200 mV) allow it to accurately resolve both positive and negative differential inputs across the shunt resistor. When the REF pin is tied to mid-supply (e.g., VS/2), the output centers at that voltage - enabling positive current to raise OUT above REF and negative current to lower OUT below REF. This capability is explicitly confirmed in TI's INA21x family description and is leveraged in battery charge/discharge monitoring applications.
What package type is used in the INA213AIRSWT part number?
INA213AIRSWT uses the 10-pin thin UQFN (RSW) package, measuring 1.80 mm × 1.40 mm with 0.5-mm pitch. This package features dual IN+ (pins 2 and 3) and dual IN− (pins 4 and 5) terminals to improve layout symmetry and reduce parasitic imbalances that degrade CMRR. The RSW variant provides significantly better thermal performance than the SC70 option (θJA = 107.3°C/W vs. 227.3°C/W), making it suitable for higher-power-density applications where junction temperature control is critical.
How does the REF pin function in the INA213AIRSWT?
The REF pin in the INA213AIRSWT sets the output common-mode voltage baseline: VOUT = 50 × (VIN+ − VIN−) + VREF. It accepts any DC voltage from GND to VS, enabling flexible interfacing - e.g., grounding REF for unipolar 0–VOUT output, tying REF to VS/2 for bipolar ±VOUT swing, or connecting REF to an external precision reference for ratiometric ADC compatibility. Unlike many difference amplifiers, the INA213AIRSWT maintains full CMRR and gain accuracy regardless of REF voltage, provided it stays within the specified range and source impedance is low (<10 Ω).
INA213AIRSWT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 10-UFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- Single-Ended
- Slew Rate:
- 0.4V/µs
- Gain Bandwidth Product:
- 80 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 28 µA
- Voltage - Input Offset:
- 5 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)
INA213AIRSWT FAQ
1.How can I place an order for INA213AIRSWT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA213AIRSWT 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 INA213AIRSWT reliable?
The price and inventory of INA213AIRSWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA213AIRSWT is usually 5 days.
3.What payment methods are accepted for INA213AIRSWT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA213AIRSWT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA213AIRSWT?
INA213AIRSWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA213AIRSWT 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 INA213AIRSWT?
For technical support, including INA213AIRSWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA213AIRSWT requirements.
6.How does Aetrix verify that INA213AIRSWT is sourced from the original manufacturer or authorized distributors?
All INA213AIRSWT 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 INA213AIRSWT meets industry standards.
7.What is the process for return or replacement of INA213AIRSWT?
All INA213AIRSWT units undergo pre-shipment inspection (PSI). If there is an issue with INA213AIRSWT, 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 INA213AIRSWT part is unused and in its original packaging.
Return procedure for INA213AIRSWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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