My Inquiry
My Account
Texas Instruments INA211BIRSWT
- Part No.:
- INA211BIRSWT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-UFQFN
- Datasheet:
-
INA211BIRSWT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 10UQFN
- Quantity:
- Payment:
- Shipping:
Inventory:150
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
INA211BIRSWT from Texas Instruments is a zero-drift, voltage-output current-shunt monitor optimized for bidirectional high-side or low-side current sensing in power management systems. It features 500 V/V fixed gain, ±35 µV max offset voltage, 0.5 µV/°C max offset drift, –0.1 V to 26 V common-mode input range, and operates from 2.7 V to 26 V supply. It enables precise 10-mV full-scale shunt measurements in battery chargers and telecom power rails.
For engineers reviewing the INA211BIRSWT datasheet, INA211BIRSWT pinout, INA211BIRSWT application, or INA211BIRSWT equivalent, this page delivers verified specifications, validated SC70/UQFN package mapping, confirmed pin functions, and real-world implementation context for precision current monitoring in space-constrained, wide-common-mode industrial and portable power systems.
Technical Context
The INA211BIRSWT uses a zero-drift chopper-stabilized architecture to achieve ultra-low input offset and near-zero thermal drift-critical for stable 10-mV shunt sensing across –40°C to +125°C. Its differential input stage rejects common-mode voltages up to 26 V independent of supply voltage, enabling direct measurement on 12-V or 24-V rails while powered from 3.3 V or 5 V.
It integrates matched thin-film resistors for 500 V/V gain with ≤1% max gain error over temperature (Version B), 10 ppm/°C max gain drift, and 105 dB min CMRR. The output drives 10-kΩ loads with rail-to-rail swing capability (to within 50 mV of V+ and 5 mV of GND) and supports 7 kHz bandwidth at 10 pF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 500 V/V - sets output = 500 × (VIN+ – VIN–); enables 10-mV shunt drop to yield 5-V full-scale output. |
| Offset Voltage (max) | ±35 µV - allows accurate sub-100-µA current resolution with 10-mΩ shunt at room temperature. |
| Offset Drift (max) | 0.5 µV/°C - ensures <±0.5 mV total offset shift over –40°C to +125°C, critical for thermal stability in battery packs. |
| Common-Mode Range | –0.1 V to 26 V - supports high-side sensing on 24-V bus without level-shifting; works with negative ground-referenced shunts. |
| Supply Voltage Range | 2.7 V to 26 V - powers from single Li-ion cell (3.3 V) or wide-input DC-DC outputs; no auxiliary supply needed. |
| Quiescent Current (max) | 100 µA - enables always-on current monitoring in energy-sensitive applications like notebook standby circuits. |
| Bandwidth | 7 kHz - sufficient for DC–10 kHz current profiling in switching power supplies and motor control feedback loops. |
| CMRR (min) | 105 dB - rejects >300,000:1 common-mode interference, essential for clean sensing in noisy 12-V automotive or telecom rails. |
Pinout & Package
INA211BIRSWT is available in the RSW (10-pin Thin UQFN) package, measuring 1.80 mm × 1.40 mm with 0.5-mm pitch. This thermally enhanced, leadless package provides low 107.3°C/W junction-to-ambient resistance and supports reflow-compatible assembly in compact power modules.
| 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 adjacent to pin. |
| GND | Analog ground | Primary return path; must be connected to system power ground with low-inductance trace to minimize noise coupling. |
| IN+ | Noninverting input | Connects to supply-side of shunt resistor; two pins (2 & 3) are internally tied-both must be routed to same net. |
| IN– | Inverting input | Connects to load-side of shunt resistor; two pins (4 & 5) are internally tied-both must be routed to same net. |
| OUT | Analog output | Voltage-output stage drives ADC or comparator; swing limited to (V+) – 0.05 V and GND + 0.005 V at 10-kΩ load. |
| REF | Reference input | Accepts 0–V+ reference voltage; determines output common-mode level; unbuffered-requires low-impedance source. |
| NC (pins 1, 7) | No connection | Not internally bonded; may be left floating or tied to GND for mechanical stability; no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Eliminates 1/f noise and thermal hysteresis-ensures repeatable 10-mV shunt measurements over temperature cycling. |
| Bidirectional sensing capability | Supports both sourcing and sinking current detection via polarity-sensitive output relative to REF pin voltage. |
| High common-mode rejection | 105 dB minimum CMRR enables reliable operation on noisy 12-V or 24-V rails with minimal filtering overhead. |
| Low quiescent current | 100 µA max draw allows integration into always-on battery monitoring paths without compromising runtime. |
| Wide supply range | 2.7–26 V operation eliminates need for dedicated bias rails-simplifies design in multi-voltage systems. |
| SC70 and UQFN packaging | RSW (10-pin UQFN) offers 40% smaller footprint than DCK (6-pin SC70), critical for space-constrained PDN monitors. |
Applications
| Power Supply Monitoring | Battery Charging Control |
|---|---|
|
Use Scenario: Real-time current monitoring in 12-V telecom rectifier modules to detect overcurrent faults before MOSFET failure. IC Role / Device Role / Timing Role: High-side current-sense amplifier converting shunt voltage to proportional analog output for microcontroller ADC sampling. Use Value: Enables fast (<100 µs) fault response using 10-mV shunt drop-reducing I²R loss by 90% versus 100-mV alternatives. |
Use Scenario: Precision charge/discharge current tracking in USB-C PD laptop battery packs during CC/CV charging phases. IC Role / Device Role / Timing Role: Bidirectional current monitor feeding analog front-end of fuel-gauge IC with 500-V/V scaled output. Use Value: ±35 µV offset supports ±50 mA accuracy at 10-mΩ shunt-meeting JEITA battery safety compliance thresholds. |
| Server VRM Health Diagnostics | Industrial PLC Power Rail Protection |
|
Use Scenario: Continuous current profiling of 48-V intermediate bus in AI accelerator servers to detect aging or short-circuit trends. IC Role / Device Role / Timing Role: Low-drift shunt monitor interfaced to isolated sigma-delta ADC for telemetry reporting over PMBus. Use Value: 0.5 µV/°C drift limits measurement drift to <±0.3% full-scale over 85°C ambient rise-enabling predictive maintenance. |
Use Scenario: Overcurrent protection for 24-V I/O power rails in programmable logic controllers handling solenoid and relay loads. IC Role / Device Role / Timing Role: High-side current sensor driving comparator threshold for hardware-level shutdown within 2 µs. Use Value: 26-V common-mode range allows direct connection to 24-V rail without external level-shifters or dividers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA212BIRSWT | 1000 V/V gain, ±35 µV offset, same package; 4 kHz bandwidth vs. 7 kHz. | Better resolution for sub-5-mV shunt drops; lower bandwidth limits dynamic response in fast-switching converters. | Select when higher gain is required for ultra-low shunt dissipation; verify loop stability with reduced BW. |
| INA213BIRSWT | 50 V/V gain, ±100 µV offset, same package; 80 kHz bandwidth vs. 7 kHz. | Lower gain accommodates larger shunt drops (e.g., 60 mV); wider BW suits high-frequency current ripple analysis. | Select for applications requiring robustness against PCB layout-induced offset errors or high-bandwidth AC current capture. |
Compared with INA211BIRSWT, INA212BIRSWT trades bandwidth for higher gain to resolve smaller shunt voltages, while INA213BIRSWT sacrifices offset performance for greater bandwidth and tolerance to layout parasitics-making each optimal for distinct current-sensing priorities: precision, resolution, or speed.
Availability
INA211BIRSWT is available at Aetrix Electronics and suitable for battery charging control, telecom power supply monitoring, and industrial PLC power rail protection requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for INA211BIRSWT 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 company specializing in analog and embedded processing technologies, with leadership in precision signal chain and power management ICs.
The INA21x product line was designed specifically for high-accuracy, low-power current sensing in space-constrained power systems-from portable electronics to industrial 24-V control modules-emphasizing zero-drift stability and wide common-mode operation.
FAQ
What is the maximum common-mode voltage supported by the INA211BIRSWT?
The INA211BIRSWT supports a common-mode input voltage range of –0.1 V to 26 V across its IN+ and IN– pins. This specification applies to Version B (denoted by 'B' in INA211BIRSWT) and is guaranteed over the full operating temperature range of –40°C to +125°C. It enables direct high-side sensing on 24-V industrial rails without external level-shifting circuitry.
Does the INA211BIRSWT require an external reference voltage?
Yes-the INA211BIRSWT requires an external reference voltage applied to its 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 = 500 × (VIN+ – VIN–) + VREF. For ratiometric operation, tie REF to a stable fraction of V+ (e.g., via resistor divider or buffered reference); unbuffered dividers require impedance matching per TI's Layout Guidelines.
Can the INA211BIRSWT measure bidirectional current?
Yes-the INA211BIRSWT supports bidirectional current sensing. When VIN+ > VIN–, the output rises above VREF; when VIN– > VIN+, the output falls below VREF. This polarity-sensitive behavior enables detection of both sourcing and sinking current through the same shunt resistor-essential for battery charge/discharge monitoring in INA211BIRSWT-based systems.
What is the thermal performance of the RSW package used in INA211BIRSWT?
The INA211BIRSWT in the RSW (10-pin Thin UQFN) package has a junction-to-ambient thermal resistance (RθJA) of 107.3°C/W and a junction-to-board resistance (RθJB) of 18.7°C/W. These values assume standard JEDEC 2-layer board conditions. The low RθJB confirms efficient heat transfer to the PCB, supporting continuous operation at full 100 µA quiescent current even in enclosed industrial enclosures.
How does the INA211BIRSWT handle input filtering requirements?
The INA211BIRSWT permits external RC filtering at its IN+ and IN– pins, but series resistance must be ≤10 Ω to avoid measurable gain error. Per TI's datasheet (Table 6-2), adding 10 Ω introduces ~0.84% gain error for INA211BIRSWT due to interaction with its 2-kΩ internal input resistors. For noise-sensitive applications, TI recommends placing filtering at the output instead-or using matched low-value resistors with local 0.1-µF bypassing at the shunt.
INA211BIRSWT 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:
- 14 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 28 µA
- Voltage - Input Offset:
- 0.55 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)
INA211BIRSWT FAQ
1.How can I place an order for INA211BIRSWT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA211BIRSWT 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 INA211BIRSWT reliable?
The price and inventory of INA211BIRSWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA211BIRSWT is usually 5 days.
3.What payment methods are accepted for INA211BIRSWT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA211BIRSWT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA211BIRSWT?
INA211BIRSWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA211BIRSWT 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 INA211BIRSWT?
For technical support, including INA211BIRSWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA211BIRSWT requirements.
6.How does Aetrix verify that INA211BIRSWT is sourced from the original manufacturer or authorized distributors?
All INA211BIRSWT 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 INA211BIRSWT meets industry standards.
7.What is the process for return or replacement of INA211BIRSWT?
All INA211BIRSWT units undergo pre-shipment inspection (PSI). If there is an issue with INA211BIRSWT, 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 INA211BIRSWT part is unused and in its original packaging.
Return procedure for INA211BIRSWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA211BIRSWT Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
