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Texas Instruments INA214BQDCKRQ1
- Part No.:
- INA214BQDCKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
INA214BQDCKRQ1.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:715
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Product details
Overview
INA214BQDCKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified, zero-drift current-shunt monitor optimized for bidirectional low-side or high-side sensing with 100 V/V fixed gain, ±100 µV max offset voltage, and –0.3 V to 26 V common-mode input range. It enables precise 10-mV full-scale shunt measurements in body control modules and motor control systems.
For engineers reviewing the INA214BQDCKRQ1 datasheet, INA214BQDCKRQ1 pinout, INA214BQDCKRQ1 application, or INA214BQDCKRQ1 equivalent, key selection criteria include gain accuracy (±1% over temperature), quiescent current (≤100 µA), SC70-6 package footprint, and functional safety documentation support for ISO 26262-compliant designs.
Technical Context
The INA214BQDCKRQ1 implements a zero-drift chopper-stabilized amplifier architecture delivering 0.5 µV/°C max offset drift and 10 ppm/°C max gain drift across –40°C to +125°C. Its differential input stage operates with rail-to-rail output swing (to within 50 mV of V+ and 5 mV of GND) and supports reference voltage biasing from 0 V to V+.
It features a 30 kHz bandwidth (CL = 10 pF), 25 nV/√Hz input-referred voltage noise, and 105 dB min common-mode rejection ratio at DC. Input bias current remains ≤35 µA over temperature, enabling stable operation with high-impedance shunt networks and external RC filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 100 V/V - sets output scaling for direct interface with 10-mV shunt drops and 3.3-V ADCs. |
| Offset voltage (max) | ±100 µV - enables accurate current measurement down to 10-mV full-scale shunt voltage. |
| Common-mode range | –0.3 V to 26 V - supports high-side sensing on 12-V/24-V automotive rails independent of supply voltage. |
| Supply voltage | 2.7 V to 26 V - allows single-supply operation from low-voltage microcontrollers up to battery rail monitoring. |
| Quiescent current (max) | 100 µA - ensures minimal power impact in always-on vehicle subsystems like body control modules. |
| Bandwidth | 30 kHz - sufficient for motor control loop feedback and transient detection in valve or stability control. |
| CMRR (min) | 105 dB - rejects noise from noisy 12-V power domains during high-side current sensing. |
Pinout & Package
INA214BQDCKRQ1 is housed in a 6-pin SC70 package (2.00 mm × 1.25 mm, 0.65 mm pitch), optimized for space-constrained automotive PCB layouts and thermal performance (RθJA = 227.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF (Pin 1) | Reference input | Bias point for output offset; configurable from 0 V to V+ to shift output range for unipolar ADC interfacing. |
| GND (Pin 2) | Ground reference | Return path for internal circuitry and output stage; must be low-impedance connection to minimize measurement error. |
| V+ (Pin 3) | Power supply | Single supply input (2.7–26 V); powers internal amplifier and output buffer; requires 0.1-µF bypass capacitor. |
| IN+ (Pin 4) | Differential input (+) | Connects to supply side of shunt resistor in high-side configuration or load side in low-side configuration. |
| IN– (Pin 5) | Differential input (–) | Connects to load side of shunt in high-side or supply side in low-side; forms differential pair with IN+. |
| OUT (Pin 6) | Voltage output | Analog output = (ILOAD × RSHUNT) × 100 + VREF; rail-to-rail capable with 10-kΩ minimum load. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation in automotive ECUs without derating. |
| Zero-drift architecture | 0.5 µV/°C max offset drift ensures stable calibration over full temperature range without software compensation. |
| Functional safety documentation | Includes FIT rate, failure mode analysis, and diagnostic coverage guidance for ASIL-B system integration. |
| High CMRR at DC and low frequency | 105 dB min CMRR suppresses battery ripple and alternator noise in 12-V vehicle electrical systems. |
| Low quiescent current | 100 µA max enables use in always-on domains such as door module wake-up circuits. |
Applications
| Body Control Module | Motor Control |
|---|---|
Use Scenario: Monitoring current draw of power windows, seat adjusters, and lighting loads in modern vehicle door modules. IC Role / Device Role / Timing Role: High-side current sensor providing real-time load status to MCU for fault detection and PWM duty cycle adjustment. Use Value: Enables 10-mV shunt-based sensing without sacrificing accuracy-reducing shunt power loss by 90% versus 100-mV alternatives. | Use Scenario: Closed-loop phase current feedback in 12-V BLDC motor drivers for HVAC blowers or radiator fans. IC Role / Device Role / Timing Role: Bidirectional current monitor feeding analog input of motor control MCU for torque regulation and overcurrent shutdown. Use Value: 30-kHz bandwidth supports fast current loop response; ±1% gain error ensures consistent torque output across temperature. |
| Electronic Stability Control | Valve Control |
Use Scenario: Measuring solenoid coil current in ABS hydraulic modulators to verify actuator engagement timing and detect open-circuit faults. IC Role / Device Role / Timing Role: Low-side current monitor with fast start-up response (<100 µs) synchronized to MCU PWM control signals. Use Value: 0.5 µV/°C offset drift prevents false fault triggers during under-hood thermal cycling from –40°C to +125°C. | Use Scenario: Fuel injector or EGR valve driver current monitoring in engine control units for closed-loop fuel metering and diagnostics. IC Role / Device Role / Timing Role: High-side sensing element interfaced to 12-bit ADC for real-time current profiling during injection pulses. Use Value: 26-V common-mode range accommodates 12-V battery transients while maintaining accuracy during cranking events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA214AQDCKRQ1 | Same SC70-6 package and 100 V/V gain, but Version A: ±100 µV max offset, –0.3 V to 26 V CM range, ±1% gain error. | Identical functional scope; differs only in AEC-Q100 test grade (A vs B) and ESD rating (HBM ±2 kV vs ±3.5 kV). | Select INA214AQDCKRQ1 for cost-sensitive non-safety-critical modules where HBM ±2 kV suffices. |
| INA213BQDCKRQ1 | 50 V/V gain, same zero-drift architecture, ±100 µV offset, –0.3 V to 26 V CM range, ±1% gain error. | Lower gain enables larger shunt drops (e.g., 20-mV full-scale), trading resolution for dynamic range headroom. | Choose INA213BQDCKRQ1 when measuring higher currents where 10-mV shunt drop is impractical due to layout or thermal constraints. |
Compared with INA214AQDCKRQ1, the INA214BQDCKRQ1 offers higher HBM ESD immunity (±3.5 kV vs ±2 kV) for harsher assembly environments; compared with INA213BQDCKRQ1, it provides double the gain for improved signal-to-noise ratio in low-current sensing, at the expense of reduced full-scale current range.
Availability
INA214BQDCKRQ1 is available at Aetrix Electronics and suitable for body control modules, motor control units, and electronic stability control systems requiring stable component supply across automotive production lifecycles.
Supply support for INA214BQDCKRQ1 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-grade signal conditioning and power management ICs.
The INA21x-Q1 product line delivers precision current sensing for ISO 26262-compliant vehicle subsystems, emphasizing zero-drift stability, wide common-mode operation, and functional safety readiness in compact SC70 packages.
FAQ
What is the maximum common-mode voltage supported by the INA214BQDCKRQ1?
The INA214BQDCKRQ1 supports a common-mode input voltage range of –0.3 V to 26 V, enabling reliable high-side current sensing on 12-V and 24-V automotive battery rails-even during cold-crank transients-without requiring level-shifting circuitry. This specification is validated across the full –40°C to +125°C operating temperature range.
Does the INA214BQDCKRQ1 require an external reference voltage?
No-the INA214BQDCKRQ1 does not require an external reference; its REF pin is optional and used only to offset the output voltage. When left unconnected or tied to GND, the device outputs a ground-referenced signal scaled by 100× the shunt voltage. Connecting REF to a stable voltage (e.g., 1.65 V) shifts the output baseline, supporting ratiometric ADC interfacing.
What is the gain error specification for the INA214BQDCKRQ1 over temperature?
The INA214BQDCKRQ1 has a maximum gain error of ±1% over the full operating temperature range of –40°C to +125°C. This value includes both initial tolerance and temperature-induced drift, and is specified for input differential voltages between –5 mV and +5 mV. Gain drift contributes ≤10 ppm/°C to this total error budget.
Can the INA214BQDCKRQ1 be used in bidirectional current sensing applications?
Yes-the INA214BQDCKRQ1 supports true bidirectional current sensing. When the shunt voltage polarity reverses (e.g., regenerative braking in motor drives), the output voltage swings below the REF voltage. With REF biased at mid-supply (e.g., 2.5 V on a 5-V rail), the output ranges from ~0.5 V to ~4.5 V, enabling full-scale measurement of both charge and discharge currents.
Is the INA214BQDCKRQ1 pin-compatible with other devices in the INA21x-Q1 family?
Yes-all INA21x-Q1 devices-including INA214BQDCKRQ1, INA213BQDCKRQ1, and INA215BQDCKRQ1-share identical 6-pin SC70 (DCK) packaging and pinout. This allows direct substitution within the same footprint when changing gain (50 V/V, 75 V/V, or 100 V/V) without PCB redesign, provided system-level gain and bandwidth requirements are verified.
INA214BQDCKRQ1 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:
- 14 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 28 µA
- Voltage - Input Offset:
- 1 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
INA214BQDCKRQ1 FAQ
1.How can I place an order for INA214BQDCKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA214BQDCKRQ1 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 INA214BQDCKRQ1 reliable?
The price and inventory of INA214BQDCKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA214BQDCKRQ1 is usually 5 days.
3.What payment methods are accepted for INA214BQDCKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA214BQDCKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA214BQDCKRQ1?
INA214BQDCKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA214BQDCKRQ1 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 INA214BQDCKRQ1?
For technical support, including INA214BQDCKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA214BQDCKRQ1 requirements.
6.How does Aetrix verify that INA214BQDCKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA214BQDCKRQ1 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 INA214BQDCKRQ1 meets industry standards.
7.What is the process for return or replacement of INA214BQDCKRQ1?
All INA214BQDCKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA214BQDCKRQ1, 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 INA214BQDCKRQ1 part is unused and in its original packaging.
Return procedure for INA214BQDCKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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