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Texas Instruments INA213CIRSWT
- Part No.:
- INA213CIRSWT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-UFQFN
- Datasheet:
-
INA213CIRSWT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 10UQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,969
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Product details
Overview
INA213CIRSWT from Texas Instruments is a voltage-output, zero-drift current-shunt monitor optimized for bidirectional low- or high-side current sensing in power management systems. It features 50 V/V fixed gain, ±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 100 µA max quiescent current. It enables precise measurement of shunt voltage drops as low as 10 mV full-scale in battery chargers and telecom power rails.
For engineers reviewing the INA213CIRSWT datasheet, INA213CIRSWT pinout, INA213CIRSWT application, or INA213CIRSWT equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options - all grounded in TI's SBOS437K production data sheet and RSW-package characterization.
Technical Context
The INA213CIRSWT implements a zero-drift chopper-stabilized amplifier architecture to achieve ultra-low offset and drift, enabling accurate current sensing at sub-100-mV shunt drops. Its differential input stage supports common-mode voltages from –0.1 V to 26 V - independent of supply - making it suitable for high-side monitoring in 12-V and 24-V industrial rails.
It integrates matched thin-film resistors for fixed 50 V/V gain (RINT = 20 kΩ), delivers 80 kHz bandwidth with 0.4 V/µs slew rate, and maintains 100 dB minimum CMRR over temperature. The REF pin allows output level shifting, supporting single-supply ADC interfacing without level translation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Fixed Gain | 50 V/V - sets output scaling for 20-mV input → 1-V output; simplifies ADC full-scale alignment. |
| Input Offset Voltage (max) | ±100 µV RTI - enables ≤10-mV full-scale shunt designs with <0.5% error at 25°C. |
| Offset Drift (max) | 0.5 µV/°C - contributes <60 µV error over –40°C to +125°C, preserving accuracy in thermal cycling. |
| Common-Mode Range | –0.1 V to 26 V - supports high-side sensing on 24-V bus with negative transient tolerance. |
| Supply Voltage Range | 2.7 V to 26 V - powers from Li-ion battery or wide-input DC-DC without external LDO. |
| Quiescent Current (max) | 100 µA - allows always-on current monitoring in energy-sensitive portable systems. |
| Bandwidth | 80 kHz - resolves fast load transients in switching power supplies and motor control feedback. |
Pinout & Package
The INA213CIRSWT 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) and 18.7°C/W (Junction-to-Board), supporting compact PCB layouts with minimal heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Analog power supply | Accepts 2.7–26 V; bypass capacitor required at pin for stability and noise rejection. |
| GND | Analog ground reference | Must be connected to low-impedance system ground plane; separates signal and power return paths. |
| IN+ | Non-inverting input | Connects to supply side of shunt; two pins (2 & 3) must be tied together per TI layout guidance. |
| IN− | Inverting input | Connects to load side of shunt; two pins (4 & 5) must be tied together to reduce parasitic impedance. |
| OUT | Voltage output | Provides rail-to-rail capable analog output (GND + 5 mV to V+ − 200 mV); drives 10-kΩ loads directly. |
| REF | Reference input | Sets output common-mode level; 0 V to V+ range enables offset adjustment or ratiometric ADC interfacing. |
| NC (pins 1, 7) | No internal connection | May be left floating or grounded; no electrical function - improves mechanical mounting and thermal conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Enables stable 10-mV full-scale shunt measurements across –40°C to +125°C without calibration. |
| Bidirectional sensing capability | Supports both charge and discharge current monitoring in battery protection circuits via REF pin biasing. |
| High CMRR (100 dB min) | Maintains accuracy in noisy environments (e.g., switch-mode power supplies) where common-mode transients exceed 1 V. |
| Low quiescent current (100 µA max) | Permits continuous current monitoring in always-on subsystems without compromising battery runtime. |
| SC70 and UQFN packaging | RSW package offers 4× smaller footprint than DCK SC70, enabling space-constrained applications like USB-C PD controllers. |
Applications
| Power Supply Monitoring | Battery Charger Feedback |
|---|---|
Use Scenario: Real-time current monitoring in 12-V/24-V DC-DC converters for server PSUs and industrial PLCs. IC Role / Device Role / Timing Role: High-side current-sense amplifier converting shunt voltage to scaled analog output for controller ADC sampling. Use Value: Enables overcurrent shutdown within 10 µs response time (based on 80-kHz BW) and supports dynamic load step compensation. |
Use Scenario: Precision charge/discharge current measurement in multi-cell Li-ion battery chargers. IC Role / Device Role / Timing Role: Bidirectional current monitor with REF-biased output feeding isolated sigma-delta ADC. Use Value: Achieves ±0.5% total unadjusted error over temperature using 10-mV shunt drop, reducing I²R loss by 90% vs. 100-mV designs. |
| Telecom Power Shelf | Notebook System Power Management |
Use Scenario: Input current supervision in 48-V intermediate bus converters for 5G base station power shelves. IC Role / Device Role / Timing Role: Low-drift, high-CMRR current sensor operating at 48-V common-mode with 3.3-V logic supply. Use Value: Maintains 100 dB CMRR up to 100 kHz, rejecting switching noise from adjacent buck regulators without external filtering. |
Use Scenario: GPU and CPU rail current monitoring in ultrabooks with dual-battery configurations. IC Role / Device Role / Timing Role: Low-quiescent-current shunt monitor enabling always-on battery gauge functionality. Use Value: Draws only 100 µA supply current while delivering 16-bit-equivalent resolution via 10-mV shunt + precision ADC. |
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. | Limited to lower-power applications (<150 mW dissipation) due to higher thermal resistance; unsuitable for sustained >50 mA output drive. | Select when board space permits larger footprint and thermal margin is sufficient; avoid for thermally constrained modules. |
| INA226AIRSAT | Digital-output (I²C) current/power monitor with 16-bit ΔΣ ADC; no analog output; 0.1% gain error, 10-µV offset, but requires host MCU firmware support. | Replaces analog signal chain with digital interface; adds voltage, power, and energy calculation - not just current. | Choose when system already uses I²C infrastructure and requires computed power metrics; not drop-in for analog feedback loops. |
Compared with INA213AIDCKR and INA226AIRSAT, the INA213CIRSWT uniquely balances ultra-low thermal resistance (UQFN), analog immediacy (no firmware dependency), and precision at minimal shunt loss - making it optimal for analog-closed-loop power regulation where latency and layout density are critical.
Availability
INA213CIRSWT is available at Aetrix Electronics and suitable for power supply monitoring, battery charger feedback, telecom power shelf supervision, and notebook system power management requiring stable component supply and long-term industrial lifecycle support.
Supply support for INA213CIRSWT 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 family was designed specifically for high-accuracy, low-loss current sensing in space- and power-constrained applications - targeting battery-powered devices, telecom infrastructure, and industrial power systems.
FAQ
What is the maximum common-mode voltage supported by the INA213CIRSWT?
The INA213CIRSWT 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 specifically to Version C devices per TI's SBOS437K datasheet, enabling reliable high-side sensing on 24-V rails with margin for negative transients. The INA213CIRSWT maintains specified accuracy within this range independent of its 2.7–26-V supply voltage.
Does the INA213CIRSWT require external gain-setting resistors?
No, the INA213CIRSWT does not require external gain-setting resistors. It integrates precision thin-film resistors to deliver a fixed 50 V/V gain - confirmed in Table 6-1 of the SBOS437K datasheet (RINT = 20 kΩ). This eliminates resistor matching errors and board space, and ensures guaranteed gain accuracy of ±0.5% over temperature without user configuration.
Can the INA213CIRSWT measure bidirectional current flow?
Yes, the INA213CIRSWT supports bidirectional current sensing by biasing the REF pin to a mid-supply voltage (e.g., V+/2). When the shunt voltage polarity reverses, the output swings above or below the REF level - enabling detection of charge vs. discharge current in battery systems. This capability is explicitly documented in TI's INA21x description and functional block diagram.
What is the thermal performance of the INA213CIRSWT in its UQFN package?
The INA213CIRSWT in the RSW (10-pin Thin UQFN) package has a junction-to-board thermal resistance (θJB) of 18.7°C/W and junction-to-ambient (θJA) of 107.3°C/W, per Section 5.4 of SBOS437K. These values reflect optimized PCB layout with thermal vias under the exposed pad - enabling operation at full 100-µA quiescent current even in compact, sealed enclosures up to +85°C ambient.
How does the INA213CIRSWT minimize shunt power loss?
The INA213CIRSWT minimizes shunt power loss by enabling full-scale current measurement with only a 10-mV shunt voltage drop - made possible by its ±100 µV max offset and zero-drift architecture. At 1 A load, this reduces I²R loss to 10 µW versus 100 µW for a 100-mV shunt, cutting thermal dissipation and PCB heating by 90% while maintaining ±0.5% gain accuracy over temperature.
INA213CIRSWT 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)
INA213CIRSWT FAQ
1.How can I place an order for INA213CIRSWT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA213CIRSWT 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 INA213CIRSWT reliable?
The price and inventory of INA213CIRSWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA213CIRSWT is usually 5 days.
3.What payment methods are accepted for INA213CIRSWT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA213CIRSWT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA213CIRSWT?
INA213CIRSWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA213CIRSWT 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 INA213CIRSWT?
For technical support, including INA213CIRSWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA213CIRSWT requirements.
6.How does Aetrix verify that INA213CIRSWT is sourced from the original manufacturer or authorized distributors?
All INA213CIRSWT 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 INA213CIRSWT meets industry standards.
7.What is the process for return or replacement of INA213CIRSWT?
All INA213CIRSWT units undergo pre-shipment inspection (PSI). If there is an issue with INA213CIRSWT, 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 INA213CIRSWT part is unused and in its original packaging.
Return procedure for INA213CIRSWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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