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Texas Instruments INA211AIDCKT
- Part No.:
- INA211AIDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
INA211AIDCKT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:8,492
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Product details
Overview
INA211AIDCKT from Texas Instruments is a voltage-output, zero-drift current-shunt monitor optimized for bidirectional high- or low-side sensing in power management systems. It features 500 V/V fixed gain, ±35 µV max offset voltage, 0.5 µV/°C max offset drift, and operates from 2.7 V to 26 V supply across –40°C to +125°C - enabling precise 10-mV full-scale shunt measurements in battery chargers and telecom power rails.
For engineers reviewing the INA211AIDCKT datasheet, INA211AIDCKT pinout, INA211AIDCKT application, or INA211AIDCKT equivalent, this page delivers verified specifications, SC70-6 package layout, real-world use cases in notebook power monitoring and cell phone battery protection, and validated alternative parts with documented functional and gain-related trade-offs.
Technical Context
The INA211AIDCKT implements a zero-drift chopper-stabilized amplifier architecture to achieve ultra-low input offset and near-zero thermal drift. Its differential input stage supports common-mode voltages from –0.3 V to 26 V independent of supply voltage, allowing direct sensing on 12-V or 24-V rails while powered from 3.3-V or 5-V logic supplies.
It uses internal precision resistor networks (RINT = 2 kΩ) to set its fixed 500 V/V gain and provides rail-to-rail output swing capability with 7 kHz bandwidth and 0.4 V/µs slew rate. The REF pin enables flexible output referencing - including ground-referenced, supply-referenced, or buffered reference configurations - critical for noise-immune ADC interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 500 V/V - scales 2-mA shunt current into 1-V output for direct ADC interface with 10-mV full-scale shunt drop. |
| Input Offset Voltage | ±35 µV max (–40°C to +125°C) - enables accurate sub-100-µA current resolution with 100-mΩ shunt. |
| Offset Drift | 0.5 µV/°C max - ensures <±0.5 mV total offset shift over full temperature range, critical for embedded thermal stability. |
| Common-Mode Range | –0.3 V to 26 V - supports high-side sensing on 24-V industrial rails or negative-ground battery monitoring without level-shifting. |
| Supply Voltage | 2.7 V to 26 V - allows single-supply operation across wide-input DC-DC converters and USB-powered systems. |
| Quiescent Current | 100 µA max - enables always-on current monitoring in battery-backed IoT nodes with minimal standby drain. |
| Bandwidth | 7 kHz - sufficient for DC–100-Hz load transients in power supply feedback loops and battery charge/discharge profiling. |
Pinout & Package
INA211AIDCKT is packaged in a 6-pin SC70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for space-constrained portable electronics. Pin functions are validated per TI SBOS437K Rev. K (Nov. 2023).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Analog input | Reference voltage node - sets output common-mode; tied to GND for single-ended output or to buffered reference for differential ADC coupling. |
| 2 (IN–) | Analog input | Connects to load side of shunt - senses current direction and magnitude relative to IN+; high CMRR rejects rail noise. |
| 3 (V+) | Power supply | 2.7–26 V analog supply - powers internal amplifier and bias network; requires 0.1-µF local bypass to GND. |
| 4 (IN+) | Analog input | Connects to supply side of shunt - differential pair with IN– enables bidirectional current detection with polarity-encoded output. |
| 5 (GND) | Analog ground | Return path for supply and signal - must be star-connected to shunt ground to avoid measurement error from ground bounce. |
| 6 (OUT) | Analog output | Voltage-output stage - rail-to-rail swing (GND + 5 mV to V+ – 200 mV) drives 10-kΩ loads directly into SAR or delta-sigma ADCs. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Eliminates 1/f noise and thermal hysteresis - maintains ±35 µV offset accuracy over 10-year field life in industrial temperature cycling. |
| Bidirectional sensing | Output polarity indicates current direction - simplifies battery charge/discharge state detection without external comparators or logic. |
| High CMRR (105 dB min) | Rejects >100-dB common-mode interference from switching regulators - preserves 0.1% gain accuracy even with 12-V ripple on 24-V rail. |
| Low quiescent current | 100 µA max enables continuous monitoring in energy-harvesting sensors and wearables with multi-week battery life. |
| SC70-6 footprint | 2.0 × 1.25 mm body size - fits within 3×3 mm PCB area alongside microcontrollers and PMICs in ultra-thin notebooks and smartphones. |
Applications
| Server Power Supply Monitoring | Notebook Battery Protection |
|---|---|
Use Scenario: Real-time current monitoring of 12-V VRM output to detect overcurrent faults before MOSFET failure. IC Role / Device Role / Timing Role: High-side current shunt monitor feeding analog input of system controller; provides sub-100-µs fault response via comparator threshold. Use Value: Enables compliance with IEC 62368-1 fault containment requirements using only 10-mV shunt drop - reducing power loss by 90% vs. legacy 100-mV designs. |
Use Scenario: Bidirectional current tracking during Li-ion charging/discharging cycles in ultrabooks with dual-battery systems. IC Role / Device Role / Timing Role: Low-side shunt amplifier with REF tied to battery pack midpoint - outputs signed voltage indicating charge (+) or discharge (–) current. Use Value: Achieves ±0.5% full-scale accuracy over –20°C to 60°C ambient - extends battery fuel-gauge runtime estimation to ±2% SOC error. |
| Telecom DC-DC Converter Feedback | USB-C PD Power Path Control |
Use Scenario: Precision current feedback in isolated 48-V to 12-V telecom DC-DC modules for dynamic load regulation. IC Role / Device Role / Timing Role: High-side monitor on secondary-side output rail - interfaces with isolated error amplifier via optocoupler or digital isolator. Use Value: 7-kHz bandwidth supports 100-Hz load step response; ±1% gain error over temperature ensures stable loop compensation without recalibration. |
Use Scenario: In-line current sensing for USB-C Power Delivery negotiation and overcurrent shutdown in portable docking stations. IC Role / Device Role / Timing Role: Low-side monitor between source port and load switch - outputs to MCU ADC for real-time 3-A/5-A profile enforcement. Use Value: 0.5 µV/°C drift prevents false OCP triggers during 50°C ambient rise - eliminates need for thermal derating in compact 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 |
|---|---|---|---|
| INA212AIDCKT | 1000 V/V gain (2× higher), same SC70-6 package, identical offset and drift specs. | Suitable where 5-mV shunt drop is required instead of 10-mV - e.g., ultra-low-power sensor nodes with 10-mΩ shunts. | Select when higher gain is needed to maximize ADC resolution without increasing shunt power loss. |
| INA213AIDCKT | 50 V/V gain (10× lower), same package and temp range, ±100 µV max offset (3× higher than INA211). | Preferred for high-current applications (>10 A) with 50–100-mV shunt drops - e.g., server board power rails. | Choose when wider dynamic range is prioritized over sub-mA resolution; trades offset accuracy for robustness against large shunt noise. |
Compared with INA211AIDCKT, INA212AIDCKT doubles gain for finer resolution at low currents but reduces measurable shunt voltage range, while INA213AIDCKT sacrifices offset performance for 10× lower gain - making it better suited for high-current, high-noise environments where absolute precision is secondary to signal headroom.
Availability
INA211AIDCKT is available at Aetrix Electronics and suitable for notebook computers, telecom equipment, and battery charger designs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for INA211AIDCKT 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 designed specifically for high-accuracy, low-power current sensing in space-constrained, thermally demanding applications - targeting battery management, server power, and portable electronics where shunt efficiency and long-term stability are critical.
FAQ
What is the maximum common-mode voltage supported by the INA211AIDCKT?
The INA211AIDCKT supports a common-mode input voltage range of –0.3 V to 26 V across its full operating temperature range (–40°C to +125°C). This allows direct high-side sensing on 24-V industrial rails or negative-ground battery monitoring without external level-shifting circuitry. The specification is validated per TI SBOS437K Rev. K, Section 5.5.
Does the INA211AIDCKT require an external reference voltage?
No - the INA211AIDCKT does not require an external reference. Its REF pin can be tied to GND for single-ended output, to V+ for supply-referenced output, or to a buffered voltage source for differential ADC interfacing. Internal biasing ensures proper operation across all configurations without external components, as confirmed in Section 6.4.3 of the official datasheet.
What is the gain error specification for the INA211AIDCKT over temperature?
The INA211AIDCKT has a maximum gain error of ±1% over the full temperature range (–40°C to +125°C) for Versions A and B, and ±0.5% for Version C. Gain drift is limited to 10 ppm/°C max. These values are measured under specified conditions (VSENSE = –5 mV to 5 mV) and published in Table 5-5 of the SBOS437K datasheet.
Can the INA211AIDCKT be used in bidirectional current sensing applications?
Yes - the INA211AIDCKT supports true bidirectional current sensing. When the current flows from IN+ to IN–, the output voltage rises above the REF voltage; when current reverses, the output falls below REF. This polarity-encoded output enables charge/discharge state detection in battery systems without additional signal conditioning circuitry.
What package type is used for the INA211AIDCKT and what are its key mechanical dimensions?
The INA211AIDCKT uses the SC70-6 (DCK) package, with nominal body dimensions of 2.00 mm × 1.25 mm and 0.95-mm height. It features gull-wing leads compatible with standard reflow soldering processes. Mechanical data is specified in Section 12 of the SBOS437K datasheet and confirmed on TI's official product folder page.
INA211AIDCKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- 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:
- 7 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:
- SC-70-6
INA211AIDCKT FAQ
1.How can I place an order for INA211AIDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA211AIDCKT 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 INA211AIDCKT reliable?
The price and inventory of INA211AIDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA211AIDCKT is usually 5 days.
3.What payment methods are accepted for INA211AIDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA211AIDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA211AIDCKT?
INA211AIDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA211AIDCKT 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 INA211AIDCKT?
For technical support, including INA211AIDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA211AIDCKT requirements.
6.How does Aetrix verify that INA211AIDCKT is sourced from the original manufacturer or authorized distributors?
All INA211AIDCKT 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 INA211AIDCKT meets industry standards.
7.What is the process for return or replacement of INA211AIDCKT?
All INA211AIDCKT units undergo pre-shipment inspection (PSI). If there is an issue with INA211AIDCKT, 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 INA211AIDCKT part is unused and in its original packaging.
Return procedure for INA211AIDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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