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Texas Instruments INA212BQDCKRQ1
- Part No.:
- INA212BQDCKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
INA212BQDCKRQ1.pdf
- Description:
- INA212-Q1 - AEC-Q100, 26V, BI-DI
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
INA212BQDCKRQ1 from Texas Instruments is an automotive-grade, zero-drift current-shunt monitor optimized for high-side or low-side bidirectional current sensing in 12-V and 24-V systems. It delivers 1000 V/V fixed gain, ±100 µV max offset voltage, and operates across –0.3 V to 26 V common-mode range on a 2.7–26 V supply - enabling precise 10-mV full-scale shunt measurements in motor control and electronic stability control modules.
For engineers reviewing the INA212BQDCKRQ1 datasheet, INA212BQDCKRQ1 pinout, INA212BQDCKRQ1 application, or INA212BQDCKRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), 0.5 µV/°C max offset drift, 100 µA max quiescent current, and SC70-6 package compatibility with space-constrained automotive PCB layouts.
Technical Context
The INA212BQDCKRQ1 implements a precision zero-drift chopper-stabilized amplifier architecture to achieve ultra-low input offset and minimal thermal drift. Its differential input stage supports bidirectional sensing with rail-to-rail output swing referenced to an externally adjustable REF pin, allowing flexible signal alignment for ADC interfacing.
It features a fixed 1000 V/V gain optimized for low shunt voltage drops, integrated 1-MΩ internal feedback network (R3/R4 = 1 kΩ), and operates without external gain-setting resistors. The device maintains CMRR ≥140 dB over temperature and rejects power-supply noise up to 140 dB at DC, supporting stable operation in noisy automotive electrical environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 1000 V/V - enables accurate measurement of 10-mV shunt voltage drops, reducing I²R loss by 90% vs. conventional 100-mV designs. |
| Offset voltage (max) | ±100 µV - ensures ≤0.1% error at 100-mV full-scale and ≤1% error at 10-mV full-scale sensing. |
| Common-mode range | –0.3 V to 26 V - supports direct connection to battery rails and high-side switching nodes in 24-V automotive systems. |
| Quiescent current (max) | 100 µA - allows continuous monitoring in always-on vehicle subsystems without significant battery drain. |
| Offset drift (max) | 0.5 µV/°C - guarantees <0.05% gain-independent offset shift over full –40°C to +125°C operating range. |
| Supply voltage range | 2.7 V to 26 V - powers directly from 3.3-V microcontroller rails or wide-range automotive supplies without LDO. |
| Bandwidth | 4 kHz - sufficient for closed-loop motor current control and overcurrent fault detection with <250-µs response time. |
Pinout & Package
INA212BQDCKRQ1 is housed in a 6-pin SC70 package (2.00 mm × 1.25 mm body size) with wettable flank terminations for automated optical inspection. This compact footprint supports high-density placement near shunt resistors in ECU modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF (Pin 1) | Reference input | Accepts 0 V to V+ reference voltage; sets output common-mode level - critical for differential ADC interfacing and noise rejection. |
| GND (Pin 2) | Ground reference | Analog ground return path; must be star-connected near shunt resistor to avoid ground loop errors. |
| V+ (Pin 3) | Power supply | Single 2.7–26 V supply input; requires 0.1-µF ceramic bypass capacitor placed within 2 mm of pin. |
| IN+ (Pin 4) | Noninverting input | Connects to high-potential side of shunt (supply side in high-side config); matched bias current minimizes common-mode error. |
| IN− (Pin 5) | Inverting input | Connects to low-potential side of shunt (load side in high-side config); forms differential pair with IN+ for VSENSE amplification. |
| OUT (Pin 6) | Output voltage | Voltage-output stage delivering (ILOAD × RSHUNT) × 1000 + VREF; drives 10-kΩ loads with rail-to-rail swing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation in body control and powertrain ECUs - eliminates need for derating or additional thermal margining. |
| Zero-drift architecture | Chopper-stabilized core reduces offset drift to 0.5 µV/°C - enables stable 10-mV full-scale sensing across full automotive temperature range. |
| High common-mode rejection | ≥140 dB CMRR at DC - rejects battery ripple and load dump transients without requiring external filtering or guard traces. |
| Adjustable output reference | REF pin accepts external voltage (0 V to V+) - allows output centering at mid-supply for single-ended ADCs or differential referencing for improved noise immunity. |
| Low quiescent power | 100 µA max supply current - supports always-on current monitoring in wake-up circuits and battery management subsystems. |
Applications
| Body Control Module | Motor Control |
|---|---|
Use Scenario: Real-time monitoring of door lock actuator, seat heater, or lighting circuit currents for fault detection and energy accounting. IC Role / Device Role / Timing Role: High-side current-sense amplifier converting shunt voltage to scaled analog output for MCU ADC sampling at 1–10 kHz. Use Value: Enables 10-mV shunt-based sensing that cuts power loss by 90% versus 100-mV designs while maintaining ±1% full-scale accuracy over temperature. | Use Scenario: Closed-loop phase current feedback in 12-V BLDC fan or pump drivers used in HVAC and cooling systems. IC Role / Device Role / Timing Role: Bidirectional current monitor providing real-time IPHASE data to motor control MCU for torque regulation and overcurrent shutdown. Use Value: 4-kHz bandwidth and <250-µs step response support fast current-loop control; 1000 V/V gain resolves 10-mA changes at 10-mΩ shunt. |
| Electronic Stability Control | Wireless Charging Transmitter |
Use Scenario: Monitoring solenoid coil current in ABS/ESC hydraulic modulator valves to verify actuation integrity and detect open/short faults. IC Role / Device Role / Timing Role: Low-drift current sensor interfaced to safety-critical ASIL-B microcontroller via isolated analog channel. Use Value: ±100 µV offset and 0.5 µV/°C drift ensure <0.5% total error over –40°C to +125°C - meets functional safety diagnostic coverage requirements. | Use Scenario: Input current monitoring in 15-W automotive wireless charging transmitters to regulate power delivery and prevent thermal runaway. IC Role / Device Role / Timing Role: High-side current monitor feeding analog feedback to Qi-compliant power controller IC for dynamic load adjustment. Use Value: 26-V common-mode range accommodates transient spikes during coil resonance; SC70 package fits tight layout near transmitter coil driver stage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA213BQDCKRQ1 | 50 V/V gain, ±100 µV offset, same SC70-6 package and AEC-Q100 Grade 1 rating | Better suited for higher shunt voltage drops (e.g., 60-mV full-scale) and wider dynamic range applications | Select when measuring larger currents where 1000 V/V gain would saturate the output; retains identical pinout and layout. |
| MAX40056ATA+T | 100 V/V gain, ±50 µV offset, –0.2 V to 65 V common-mode, 8-pin TDFN package | Supports higher voltage rails (e.g., 48-V mild hybrid systems) but requires PCB redesign due to different pin count and layout | Choose for next-gen 48-V architectures or when extended common-mode range beyond 26 V is required; not drop-in compatible. |
Compared with INA213BQDCKRQ1 and MAX40056ATA+T, the INA212BQDCKRQ1 provides the highest gain (1000 V/V) in the family for ultra-low shunt voltages, maintains identical automotive qualification and package, and offers optimal trade-off between resolution and dynamic range for 12/24-V motor and valve control.
Availability
INA212BQDCKRQ1 is available at Aetrix Electronics and suitable for body control modules, motor control units, electronic stability control systems, and wireless charging transmitters requiring stable component supply under AEC-Q100 automotive qualification.
Supply support for INA212BQDCKRQ1 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 deep expertise in automotive electronics and functional safety design.
The INA21x-Q1 product line delivers precision current-sense amplifiers engineered specifically for automotive power management, including battery monitoring, motor control, and active safety systems - emphasizing zero-drift accuracy, wide common-mode operation, and AEC-Q100 compliance.
FAQ
What is the maximum common-mode voltage supported by the INA212BQDCKRQ1?
The INA212BQDCKRQ1 supports a common-mode input voltage range of –0.3 V to 26 V, verified per AEC-Q100 test conditions. This allows direct connection to 12-V and 24-V battery rails and high-side switch nodes. Operation above 26 V requires external transient protection (e.g., Zener clamping), as sustained >26 V violates absolute maximum ratings. The INA212BQDCKRQ1 maintains specified performance only within this validated range.
Does the INA212BQDCKRQ1 require external gain-setting resistors?
No, the INA212BQDCKRQ1 integrates a fixed 1000 V/V gain configuration using internal 1-kΩ resistors (R3/R4), eliminating the need for external gain components. This simplifies layout, improves temperature stability, and avoids resistor tolerance-induced errors. The gain is factory-trimmed and specified as ±1% over –40°C to +125°C. The INA212BQDCKRQ1 achieves this without user-adjustable feedback networks.
How does the REF pin function in the INA212BQDCKRQ1?
The REF pin on the INA212BQDCKRQ1 sets the output voltage common-mode level as VOUT = (ILOAD × RSHUNT) × 1000 + VREF. It accepts any DC voltage from 0 V to V+, enabling output centering at mid-supply for single-ended ADCs or differential referencing. Connecting REF to GND yields a unipolar 0–VOUT(MAX) output; tying it to V+/2 supports bipolar measurement around mid-rail. The INA212BQDCKRQ1's REF input impedance is high (>1 GΩ), minimizing loading effects.
Is the INA212BQDCKRQ1 pin-compatible with other devices in the INA21x-Q1 family?
Yes, all INA21x-Q1 variants - including INA210BQDCKRQ1, INA211BQDCKRQ1, INA212BQDCKRQ1, INA213BQDCKRQ1, INA214BQDCKRQ1, and INA215BQDCKRQ1 - share identical 6-pin SC70 packaging and pinout. This allows direct substitution in existing layouts when changing gain (e.g., from 1000 V/V to 50 V/V) without PCB revision. The INA212BQDCKRQ1 uses the same footprint, thermal pad, and solder profile as its siblings.
What is the typical bandwidth and slew rate of the INA212BQDCKRQ1?
The INA212BQDCKRQ1 has a typical small-signal bandwidth of 4 kHz (at CLOAD = 10 pF) and a slew rate of 0.4 V/µs. These values support fast transient response for overcurrent detection (<250 µs rise time) and closed-loop motor current control. Bandwidth is gain-dependent across the INA21x-Q1 family, and the INA212BQDCKRQ1's 4-kHz rating reflects its 1000 V/V configuration - lower-gain versions (e.g., INA213-Q1) achieve up to 80 kHz.
INA212BQDCKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
INA212BQDCKRQ1 FAQ
1.How can I place an order for INA212BQDCKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA212BQDCKRQ1 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 INA212BQDCKRQ1 reliable?
The price and inventory of INA212BQDCKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA212BQDCKRQ1 is usually 5 days.
3.What payment methods are accepted for INA212BQDCKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA212BQDCKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA212BQDCKRQ1?
INA212BQDCKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA212BQDCKRQ1 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 INA212BQDCKRQ1?
For technical support, including INA212BQDCKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA212BQDCKRQ1 requirements.
6.How does Aetrix verify that INA212BQDCKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA212BQDCKRQ1 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 INA212BQDCKRQ1 meets industry standards.
7.What is the process for return or replacement of INA212BQDCKRQ1?
All INA212BQDCKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA212BQDCKRQ1, 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 INA212BQDCKRQ1 part is unused and in its original packaging.
Return procedure for INA212BQDCKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA212BQDCKRQ1 Tags
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STMicroelectronics
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Texas Instruments
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Microchip Technology
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Texas Instruments
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