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Texas Instruments INA211BQDCKRQ1
- Part No.:
- INA211BQDCKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
INA211BQDCKRQ1.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,697
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Product details
Overview
INA211BQDCKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive current-shunt monitor with zero-drift architecture, 500 V/V fixed gain, ±100 µV max offset voltage, and –0.3 V to 26 V common-mode input range. It operates from 2.7 V to 26 V supply, draws ≤100 µA quiescent current, and is used for high-accuracy bidirectional current sensing in motor control and electronic stability control systems.
For engineers reviewing the INA211BQDCKRQ1 datasheet, INA211BQDCKRQ1 pinout, INA211BQDCKRQ1 application, or INA211BQDCKRQ1 equivalent, key selection criteria include its 500 V/V gain accuracy (±1% over temperature), 0.5 µV/°C max offset drift, SC70-6 package footprint, and functional safety documentation support for ISO 26262-compliant designs.
Technical Context
The INA211BQDCKRQ1 implements a zero-drift chopper-stabilized amplifier topology enabling precise low-side and high-side current measurement at shunt voltages as low as ±10 mV full-scale. Its differential input stage rejects common-mode signals up to 26 V independent of supply voltage, while internal matched resistors provide fixed 500 V/V gain without external components.
It features a buffered voltage output referenced to an externally supplied REF pin (0 V to V+), supports operation from –40°C to +125°C, and delivers 7 kHz bandwidth with 0.4 V/µs slew rate. Input bias current remains below 35 µA across temperature, and CMRR exceeds 140 dB at DC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 500 V/V - enables 10-mV shunt drop to produce 5-V output, reducing power loss in sensing resistor by 10× vs. 100-mV designs |
| Offset voltage (max) | ±100 µV - ensures <0.2% error at 50-mV full-scale shunt voltage, critical for low-current detection |
| Common-mode range | –0.3 V to 26 V - supports direct connection to 12-V or 24-V automotive rails without level-shifting |
| Quiescent current (max) | 100 µA - allows integration into always-on vehicle subsystems with minimal battery drain |
| Gain error (max) | ±1% over –40°C to +125°C - guarantees consistent scaling across full automotive temperature range |
| Offset drift (max) | 0.5 µV/°C - limits total offset shift to ≤100 µV over 200°C span, preserving accuracy in engine bay environments |
| Bandwidth | 7 kHz - sufficient for closed-loop motor control feedback and overcurrent fault detection within 143 µs response time |
Pinout & Package
INA211BQDCKRQ1 is housed in a 6-pin SC70 package (2.00 mm × 1.25 mm body size) with wettable flanks, optimized for automated optical inspection and high-density automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF (Pin 1) | Reference input | Accepts 0 V to V+ reference voltage; output = (VIN+ – VIN–) × 500 + VREF; requires low-impedance source or buffering to maintain CMRR |
| GND (Pin 2) | Ground reference | Analog ground return for internal circuitry; must be connected to low-noise system ground plane near shunt resistor |
| V+ (Pin 3) | Power supply | 2.7 V to 26 V single supply; bypass with 0.01–0.1 µF capacitor directly at pin for stability |
| IN+ (Pin 4) | Noninverting input | Connects to supply-side of shunt; high-impedance input (≥1 MΩ) minimizes loading on high-voltage rail |
| IN– (Pin 5) | Inverting input | Connects to load-side of shunt; matched input impedance ensures common-mode rejection >140 dB |
| OUT (Pin 6) | Voltage output | Buffered rail-to-rail output drives ADC inputs directly; swings to within 50 mV of V+ and 5 mV of GND at full load |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation in body control modules and powertrain ECUs |
| Zero-drift architecture | Eliminates 1/f noise and thermal drift, enabling stable 10-mV full-scale current sensing over lifetime |
| Functional safety documentation | Includes FIT rate data, failure mode analysis, and diagnostic coverage guidance for ASIL-B system integration |
| Bidirectional measurement capability | Supports both charging and discharging current monitoring in 12-V/48-V hybrid architectures |
| High CMRR (>140 dB) | Maintains accuracy despite fast transients on 12-V battery rail (e.g., load dump, jump start) |
Applications
| Body Control Module | Motor Control |
|---|---|
Use Scenario: Monitoring current to door lock actuators, seat heaters, and lighting loads in modern vehicle body controllers. IC Role / Device Role / Timing Role: High-side current sensor providing real-time load status and open-circuit/short-circuit fault detection. Use Value: Enables predictive diagnostics and energy optimization using ±100 µV offset and 500 V/V gain to resolve 20 mA increments at 10-mV shunt drop. | Use Scenario: Closed-loop phase current sensing in 12-V BLDC fans and EPS assist motors. IC Role / Device Role / Timing Role: Bidirectional analog front-end feeding ADC for field-oriented control (FOC) algorithms. Use Value: 7-kHz bandwidth and 0.4 V/µs slew rate support 1-kHz PWM carrier frequency with <1% distortion in current reconstruction. |
| Electronic Stability Control | Wireless Charging Transmitter |
Use Scenario: Measuring solenoid coil current in ABS hydraulic modulators during emergency braking events. IC Role / Device Role / Timing Role: High-speed current monitor capturing transient peaks up to 10 A with <150 µs response time. Use Value: –0.3 V to 26 V common-mode range accommodates negative flyback voltages during inductive turn-off without clamping diodes. | Use Scenario: Real-time transmitter coil current regulation in SAE J2954-compliant 3.7-kW wireless charging pads. IC Role / Device Role / Timing Role: Precision shunt amplifier feeding digital controller for resonant frequency tracking and foreign object detection (FOD). Use Value: 0.5 µV/°C max offset drift prevents thermal-induced current measurement drift during sustained 50°C–85°C pad operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA212BQDCKRQ1 | 1000 V/V gain, ±100 µV max offset, 4 kHz bandwidth | Better suited for sub-5-mV shunt drops; lower bandwidth limits use in high-frequency motor control | Select when higher gain is required for ultra-low-power sensing, but verify loop stability with reduced BW |
| INA214BQDCKRQ1 | 100 V/V gain, ±60 µV max offset, 30 kHz bandwidth, same SC70-6 package | Higher bandwidth and lower offset support faster transient detection; lower gain requires larger shunt for same output swing | Prefer for applications needing rapid overcurrent response (e.g., short-circuit protection) where 50-mV shunt drop is acceptable |
Compared with INA212BQDCKRQ1 and INA214BQDCKRQ1, the INA211BQDCKRQ1 offers optimal balance of gain (500 V/V), bandwidth (7 kHz), and offset (±100 µV) for general-purpose automotive current monitoring-delivering 10-mV full-scale resolution without sacrificing response speed or requiring layout changes.
Availability
INA211BQDCKRQ1 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 across automotive production lifecycles.
Supply support for INA211BQDCKRQ1 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 delivering analog and embedded processing solutions, with deep expertise in precision signal chain and automotive-grade IC design.
The INA21x-Q1 product line was engineered specifically for AEC-Q100-compliant current sensing in harsh automotive environments, emphasizing zero-drift accuracy, wide common-mode tolerance, and functional safety readiness.
FAQ
What is the maximum common-mode voltage supported by the INA211BQDCKRQ1?
The INA211BQDCKRQ1 supports a common-mode input voltage range of –0.3 V to 26 V, enabling direct connection to 12-V and 24-V automotive battery rails without external level-shifting circuitry. This specification is guaranteed over the full operating temperature range of –40°C to +125°C and applies independently of the device's 2.7-V to 26-V supply voltage. Exceeding 26 V requires external transient protection per Section 6.4.4 of the datasheet.
Does the INA211BQDCKRQ1 support bidirectional current sensing?
Yes, the INA211BQDCKRQ1 supports true bidirectional current sensing. Its output voltage is calculated as VOUT = (VIN+ – VIN–) × 500 + VREF, where VREF sets the zero-current baseline. With VREF biased at mid-supply (e.g., 2.5 V on a 5-V rail), the output spans 0 V to 5 V for both positive and negative differential inputs. This capability is explicitly validated in the INA21x-Q1 family's test conditions and used in applications like regenerative braking and dual-direction motor control.
What is the gain error specification for the INA211BQDCKRQ1 over temperature?
The INA211BQDCKRQ1 has a maximum gain error of ±1% over the full operating temperature range of –40°C to +125°C. This value is specified for Versions A and B of the INA21x-Q1 family, and the INA211BQDCKRQ1 is a Version B device. Gain drift is further limited to 10 ppm/°C maximum, contributing less than ±0.2% additional error across the full temperature span. These parameters are production-tested and documented in Section 5.5 of the SBOS475K datasheet.
Can the INA211BQDCKRQ1 be used in high-side configuration?
Yes, the INA211BQDCKRQ1 is explicitly designed for both high-side and low-side current sensing configurations. Its wide –0.3 V to 26 V common-mode input range allows the IN+ and IN– pins to be placed across a shunt resistor on either side of the load, including directly on the battery rail. The device's zero-drift architecture maintains accuracy regardless of common-mode voltage, and its internal topology rejects supply noise-making it suitable for high-side placement in noisy automotive power domains.
What package type does the INA211BQDCKRQ1 use, and is it RoHS compliant?
The INA211BQDCKRQ1 uses a 6-pin SC70 package (body size 2.00 mm × 1.25 mm) with wettable flanks, as confirmed in the Device Information table and Package Option Addendum of the datasheet. It is RoHS compliant and halogen-free, meeting automotive industry requirements for lead-free assembly and environmental compliance. The SC70-6 footprint is identical across all INA21x-Q1 variants, enabling drop-in gain selection in existing layouts.
INA211BQDCKRQ1 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:
- 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
INA211BQDCKRQ1 FAQ
1.How can I place an order for INA211BQDCKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA211BQDCKRQ1 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 INA211BQDCKRQ1 reliable?
The price and inventory of INA211BQDCKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA211BQDCKRQ1 is usually 5 days.
3.What payment methods are accepted for INA211BQDCKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA211BQDCKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA211BQDCKRQ1?
INA211BQDCKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA211BQDCKRQ1 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 INA211BQDCKRQ1?
For technical support, including INA211BQDCKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA211BQDCKRQ1 requirements.
6.How does Aetrix verify that INA211BQDCKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA211BQDCKRQ1 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 INA211BQDCKRQ1 meets industry standards.
7.What is the process for return or replacement of INA211BQDCKRQ1?
All INA211BQDCKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA211BQDCKRQ1, 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 INA211BQDCKRQ1 part is unused and in its original packaging.
Return procedure for INA211BQDCKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA211BQDCKRQ1 Tags
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