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Texas Instruments INA212BIDCKT
- Part No.:
- INA212BIDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
INA212BIDCKT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:499
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Product details
Overview
INA212BIDCKT 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 1000 V/V, ±35 µV maximum offset voltage (over temperature), 0.5 µV/°C max offset drift, and operates from 2.7 V to 26 V supply with only 100 µA quiescent current - enabling precise 10-mV full-scale shunt measurements in battery chargers and telecom power management.
For engineers reviewing the INA212BIDCKT datasheet, INA212BIDCKT pinout, INA212BIDCKT application, or INA212BIDCKT equivalent, this page delivers verified specifications, SC70-6 package layout, real-world use cases in notebook power monitoring and battery protection circuits, and two validated alternative parts with documented functional and gain-related differences.
Technical Context
The INA212BIDCKT implements a precision zero-drift chopper-stabilized amplifier topology optimized for differential sensing across shunt resistors under wide common-mode conditions (–0.1 V to 26 V). Its internal matched resistor network (R3 = R4 = 1 kΩ) sets the 1000 V/V gain and enables high CMRR (105–140 dB) independent of supply voltage.
It supports both unidirectional and bidirectional current measurement via user-configurable REF pin biasing (0 V to VS), and integrates rail-to-rail output swing (within 50 mV of VS and 5 mV of GND) with 4 kHz bandwidth and 0.4 V/µs slew rate - suitable for fast transient detection in closed-loop power control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 1000 V/V - scales 10-mV shunt drop to 10-V output, minimizing I²R loss while maintaining ADC resolution. |
| Offset Voltage (max) | ±35 µV - enables accurate sub-100-mA current sensing with 100-mΩ shunt at 10-mV full-scale. |
| Offset Drift (max) | 0.5 µV/°C - ensures <±0.5% gain error contribution over –40°C to +125°C operating range. |
| 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 | 2.7 V to 26 V - powers directly from system rail without LDO; compatible with Li-ion battery input (3.0–4.2 V) or 24-V DC bus. |
| Quiescent Current | 100 µA max - allows always-on current monitoring in energy-sensitive portable devices. |
| Bandwidth | 4 kHz - sufficient for DC–PWM current feedback in switch-mode power supplies and battery charge controllers. |
| CMRR | 105–140 dB - rejects noise from noisy 12-V or 24-V supply rails during high-precision measurement. |
Pinout & Package
INA212BIDCKT is packaged in a 6-pin SC70 (DCK) package with nominal body size 2.00 mm × 1.25 mm and 0.65-mm lead pitch. The package is moisture-sensitive level 1 (MSL-1) and RoHS-compliant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Analog input | User-defined reference voltage (0 V to VS) sets output common-mode; enables bidirectional current sensing when biased at mid-supply. |
| 2 (IN–) | Analog input | Connects to load side of shunt; differential input node with 1-kΩ internal resistance (R4). |
| 3 (V+) | Analog power supply | Primary supply input (2.7–26 V); bypass capacitor required between V+ and GND for stability. |
| 4 (IN+) | Analog input | Connects to supply side of shunt; differential input node with 1-kΩ internal resistance (R3). |
| 5 (GND) | Analog ground | Reference return for all analog signals; must be tied to system power ground with low-impedance path. |
| 6 (OUT) | Analog output | Voltage-output stage drives 10-kΩ loads; swing within 50 mV of V+ and 5 mV of GND at full temperature range. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Eliminates 1/f noise and thermal drift - maintains ±35 µV offset and 0.5 µV/°C drift over –40°C to +125°C. |
| Bidirectional sensing capability | Configurable via REF pin: 0 V enables unidirectional; VS/2 enables symmetric ±10-mV full-scale bidirectional range. |
| High common-mode rejection | 105–140 dB CMRR ensures accurate current reading despite 12-V or 24-V rail noise coupling into IN+ and IN–. |
| Low-power operation | 100 µA max supply current allows integration into always-on battery fuel gauging and standby power monitors. |
| Wide supply range | 2.7–26 V operation supports direct connection to Li-ion packs, 5-V logic rails, and 24-V industrial buses without regulation. |
Applications
| Power Supply Monitoring | Notebook Battery Protection |
|---|---|
|
Use Scenario: Real-time monitoring of +12-V DC-DC converter output current in ultrabook power delivery subsystems. IC Role / Device Role / Timing Role: High-side current-shunt monitor measuring differential voltage across 5-mΩ shunt, feeding analog input of system microcontroller. Use Value: Enables dynamic load throttling and overcurrent shutdown within 100 µs response time using 4-kHz bandwidth and rail-to-rail output swing. |
Use Scenario: Bidirectional current tracking during Li-ion battery charge/discharge cycles in Windows-based laptops. IC Role / Device Role / Timing Role: Zero-drift current-sense amplifier with REF biased at 2.5 V, converting ±5-mA shunt voltage to ±5-V output for ADC sampling. Use Value: Achieves <±0.5% total current measurement error across –40°C to +85°C ambient, critical for accurate Coulomb counting. |
| Telecom 48-V Backup Power | USB-C PD Power Path |
|
Use Scenario: Monitoring hold-up current in -48-V telecom rectifier backup systems during AC mains failure. IC Role / Device Role / Timing Role: High-side monitor on 48-V rail with shunt placed between rectifier output and battery bank, referenced to isolated ground. Use Value: Withstands –0.1 V to 26 V common-mode range (via level-shifted interface), enabling safe sensing at 48-V potential with external attenuation. |
Use Scenario: In-line current verification in USB-C Power Delivery sink applications where 5–20 V input must be validated before enabling load switches. IC Role / Device Role / Timing Role: Low-side current monitor on VBUS path with 10-mΩ shunt, interfacing directly to PD controller's analog monitoring pins. Use Value: 1000 V/V gain delivers 100-mV/mA sensitivity - resolves 10-mA changes at 5-V input, meeting USB-IF compliance test resolution requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA213BIDCKT | Fixed gain = 50 V/V; higher input offset (±100 µV max); wider common-mode (–0.3 V to 26 V, Version A) | Better suited for high-current, low-precision applications (e.g., 5-A shunt with 100-mV drop); less sensitive to PCB layout errors due to lower gain. | Select when full-scale shunt voltage exceeds 50 mV and ultra-low offset is not required - reduces gain error from external filter resistors. |
| INA226AIDGST | I²C digital output; 16-bit delta-sigma ADC; integrated 0.1-Ω sense resistor option; 26-V common-mode; 10-µV offset typical | Replaces analog signal chain with digital interface; eliminates external ADC and calibration; supports multi-channel monitoring via I²C bus. | Choose for systems requiring programmable gain, alert thresholds, or host-controlled calibration - adds firmware overhead but removes analog routing complexity. |
Compared with INA212BIDCKT, INA213BIDCKT trades gain and offset performance for robustness against layout-induced errors, while INA226AIDGST replaces analog output with calibrated digital reporting - making it ideal for smart power managers needing telemetry, not raw voltage output.
Availability
INA212BIDCKT is available at Aetrix Electronics and suitable for notebook power management, telecom backup systems, and USB-C PD power path monitoring requiring stable component supply, long-term lifecycle support, and traceable TI-sourced inventory.
Supply support for INA212BIDCKT 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 amplifiers, power management ICs, and signal chain solutions.
The INA21x series was developed specifically for high-accuracy, low-power current sensing in space-constrained, thermally demanding applications such as portable computing, telecom infrastructure, and battery-powered industrial equipment.
FAQ
What is the maximum common-mode voltage supported by the INA212BIDCKT?
The INA212BIDCKT supports a common-mode input voltage range of –0.1 V to 26 V across its IN+ and IN– pins. This specification applies to Versions B and C (as indicated by the 'B' in INA212BIDCKT), enabling reliable high-side sensing on 24-V industrial rails and compatibility with negative transients down to –0.1 V relative to GND.
Does the INA212BIDCKT require an external reference voltage?
No - the INA212BIDCKT does not require an external reference voltage to operate. Its REF pin is user-configurable: tying REF to GND enables unidirectional sensing; biasing REF at VS/2 enables bidirectional operation. No external reference IC is needed unless precision ratiometric accuracy beyond internal matching is required.
Can the INA212BIDCKT measure bidirectional current?
Yes, the INA212BIDCKT supports bidirectional current measurement when the REF pin is biased at mid-supply (e.g., VS/2). This configures the output to swing symmetrically around the reference voltage - for example, a ±5-mV shunt drop produces a ±5-V output centered at 2.5 V on a 5-V supply - enabling true AC-coupled current analysis.
What is the purpose of the NC pins in the UQFN package, and does the INA212BIDCKT have them?
The INA212BIDCKT uses the SC70-6 (DCK) package, which has no NC pins - all six pins (REF, IN–, V+, IN+, GND, OUT) are functional. NC pins appear only in the 10-pin UQFN (RSW) variant of the INA21x family (e.g., INA212AIRSAT), where pins 1 and 7 are unconnected. The DCK package avoids NC pins entirely for simplified layout.
How does the gain error specification of ±0.5% apply to the INA212BIDCKT?
The ±0.5% gain error (maximum over temperature) applies specifically to Version C devices like the INA212BIDCKT. This error includes contributions from initial tolerance, temperature drift (≤10 ppm/°C), and linearity (±0.01%). It is measured across the full operating range (–40°C to +125°C) with VSENSE = –5 mV to +5 mV, ensuring predictable scaling from shunt voltage to output voltage in production systems.
INA212BIDCKT 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:
- 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:
- SC-70-6
INA212BIDCKT FAQ
1.How can I place an order for INA212BIDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA212BIDCKT 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 INA212BIDCKT reliable?
The price and inventory of INA212BIDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA212BIDCKT is usually 5 days.
3.What payment methods are accepted for INA212BIDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA212BIDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA212BIDCKT?
INA212BIDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA212BIDCKT 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 INA212BIDCKT?
For technical support, including INA212BIDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA212BIDCKT requirements.
6.How does Aetrix verify that INA212BIDCKT is sourced from the original manufacturer or authorized distributors?
All INA212BIDCKT 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 INA212BIDCKT meets industry standards.
7.What is the process for return or replacement of INA212BIDCKT?
All INA212BIDCKT units undergo pre-shipment inspection (PSI). If there is an issue with INA212BIDCKT, 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 INA212BIDCKT part is unused and in its original packaging.
Return procedure for INA212BIDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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