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Texas Instruments INA186A4QDBVRQ1
- Part No.:
- INA186A4QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
INA186A4QDBVRQ1.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,955
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Product details
Overview
INA186A4QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive current-sense amplifier optimized for bidirectional 12-V battery monitoring in body control modules and telematics units. It delivers 200 V/V fixed gain, ±50 µV max offset voltage, 120 dB minimum CMRR, and operates from 1.7 V to 5.5 V supply across –40°C to +125°C ambient.
For engineers reviewing the INA186A4QDBVRQ1 datasheet, INA186A4QDBVRQ1 pinout, INA186A4QDBVRQ1 application, or INA186A4QDBVRQ1 equivalent, this page provides verified functional safety–capable specifications, SC70-6 package details, bidirectional sensing validation, and automotive-grade thermal performance data - all confirmed for the exact part number.
Technical Context
The INA186A4QDBVRQ1 uses a capacitively coupled front-end architecture to achieve high common-mode rejection (120 dB min) while supporting –0.2 V to +40 V input common-mode voltage independent of its 1.7–5.5 V supply. Its zero-drift topology enables ±50 µV offset and 0.5 µV/°C drift, critical for microamp-range current measurement with large sense resistors.
It integrates an ENABLE pin (active-high) for low-power operation-reducing quiescent current to 10 nA when disabled-and supports bidirectional sensing via external REF voltage biasing. The device's 33 kHz bandwidth (A4 gain), 0.3 V/µs slew rate, and rail-to-rail output (GND +1 mV / VS –40 mV) are validated for real-time battery current tracking in automotive BMS and eCall systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 200 V/V - sets full-scale output at 200× sensed differential voltage; defines resolution for 1-mV shunt drops |
| Offset Voltage | ±50 µV max - enables accurate sub-10 mA current measurement with 100-mΩ shunt at 12 V bus |
| CMRR | 120 dB min - rejects battery voltage transients up to 40 V without introducing offset error |
| Supply Range | 1.7 V to 5.5 V - allows direct interface with 1.8-V or 3.3-V microcontrollers in BCM designs |
| Quiescent Current | 48 µA typical - supports always-on monitoring with <1 µW power overhead at 1.8 V |
| Operating Temp | –40°C to +125°C - qualified for under-hood and dashboard-mounted automotive locations |
| Input Bias Current | 500 pA typical - permits use of ≥10 kΩ RC filters on IN+/IN– without gain/phase error |
Pinout & Package
INA186A4QDBVRQ1 is packaged in SC70-6 (DCK) with 2.00 mm × 1.25 mm body size. This variant includes REF and ENABLE pins, enabling bidirectional sensing and ultra-low-power shutdown mode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF | Analog reference input | Bias point for bidirectional output swing; externally set to midpoint (e.g., VS/2) to enable ±current detection |
| OUT | Analog voltage output | 200×(IN+ − IN−) + VREF; rail-to-rail capable (GND +1 mV / VS −40 mV) |
| GND | Analog ground | Reference for internal circuitry and REF/OUT; must be low-impedance path to system ground |
| VS | Power supply | 1.7–5.5 V single supply; powers amplifier core and ENABLE logic |
| IN+ | Positive current-sense input | Connects to high-side bus or low-side load; withstands −0.2 V to +40 V common-mode |
| IN− | Negative current-sense input | Connects to low-side ground or high-side load; matched to IN+ for CMRR integrity |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing support | Enabled by REF pin-allows single-shunt monitoring of charge/discharge currents in 12-V BMS |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C operation with lifetime reliability testing per automotive stress standards |
| Functional safety documentation | TI-provided FIT rate, failure modes, and diagnostic coverage data for ISO 26262 ASIL-B integration |
| Ultra-low input bias current | 500 pA typ-enables stable operation with >100-kΩ input filtering for EMI suppression in noisy vehicle environments |
| Enable-controlled shutdown | Reduces IQ to 10 nA; eliminates output loading and preserves MCU ADC reference integrity during sleep |
Applications
| Body Control Module (BCM) | Telematics Control Unit |
|---|---|
Use Scenario: Real-time monitoring of door lock actuators, lighting loads, and HVAC fan current in centralized vehicle control units. IC Role / Device Role / Timing Role: High-side current-sense amplifier measuring shunt voltage across 10–100 mΩ resistors on 12-V distribution rails. Use Value: Detects open-circuit faults and overcurrent events with ±1% gain accuracy and <50 µV offset-enabling precise load classification without calibration. | Use Scenario: Continuous battery discharge profiling during GPS/data transmission cycles in connected car platforms. IC Role / Device Role / Timing Role: Bidirectional current monitor on main 12-V supply, interfaced to MCU ADC with REF = VS/2 for symmetric ±range. Use Value: 500 pA input bias permits use of 10-kΩ/10-nF RC filter on IN+/IN−, rejecting GSM burst noise while preserving µA-level resolution. |
| Emergency Call (eCall) | 12-V Battery Management System |
Use Scenario: Verifying backup power availability and detecting parasitic drain during vehicle ignition-off state. IC Role / Device Role / Timing Role: Always-on unidirectional monitor on battery feed, with ENABLE pulsed only during wake-up diagnostics. Use Value: 48 µA quiescent current ensures <1 µA average system drain over 24-hour monitoring window-extending battery hold time. | Use Scenario: Measuring charge/discharge current through single shunt in start-stop and regenerative braking subsystems. IC Role / Device Role / Timing Role: Bidirectional amplifier with REF biased to 1.25 V (VS = 2.5 V), delivering 0.25–2.25 V output for ±10-A range. Use Value: 120 dB CMRR rejects 12-V ripple and alternator switching noise, maintaining <0.1% measurement error during engine cranking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | 500 V/V gain, 80-ppm/°C gain drift, no REF pin, SOT-23-8 package | Unidirectional only; higher gain but lower precision at temperature extremes | Select when fixed high-gain unidirectional sensing is sufficient and REF functionality is unnecessary |
| MAX40010FAUT+T | 200 V/V gain, 100 µV max offset, no ENABLE, 6-pin WLP package | Lacks enable/shutdown; smaller footprint but no low-power sleep mode | Choose for space-constrained PCBs where continuous monitoring is acceptable and 10-nA shutdown is not required |
Compared with INA240A1QDRQ1 and MAX40010FAUT+T, the INA186A4QDBVRQ1 uniquely combines bidirectional capability (via REF), 10 ppm/°C gain drift, and 10-nA shutdown-making it optimal for automotive battery state-of-charge tracking with minimal power budget impact.
Availability
INA186A4QDBVRQ1 is available at Aetrix Electronics and suitable for body control modules, telematics control units, and emergency call (eCall) systems requiring stable component supply across automotive production lifecycles.
Supply support for INA186A4QDBVRQ1 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 INA186-Q1 product line was designed specifically for high-precision, low-power current sensing in 12-V automotive battery systems-emphasizing AEC-Q100 compliance, functional safety readiness, and bidirectional measurement capability.
FAQ
What is the maximum common-mode voltage the INA186A4QDBVRQ1 can withstand?
The INA186A4QDBVRQ1 supports a continuous common-mode input range of –0.2 V to +40 V and survives transient voltages up to 42 V. This rating is validated for automotive 12-V battery applications, including load dump and jump-start conditions. The absolute maximum rating for IN+ and IN– pins relative to GND is 42 V, as specified in Section 6.1 of the official datasheet.
Does the INA186A4QDBVRQ1 support bidirectional current sensing?
Yes, the INA186A4QDBVRQ1 supports bidirectional current sensing because it is packaged in SC70-6 (DCK), which includes the REF pin. Applying a reference voltage (e.g., VS/2) to REF centers the output voltage, allowing positive differential inputs to produce outputs above REF and negative inputs to produce outputs below REF. This functionality is explicitly confirmed for the INA186A4QDBVRQ1 in the Pin Functions table and Figure 5-1 of the datasheet.
What is the gain error specification for the INA186A4QDBVRQ1?
The INA186A4QDBVRQ1 has a maximum gain error of ±1% across temperature (–40°C to +125°C) and supply voltage (1.7 V to 5.5 V). This value is specified in Section 6.5 Electrical Characteristics under "EG Gain error" and applies directly to the A4 variant (200 V/V). The gain error drift is limited to 10 ppm/°C, ensuring stability in under-hood thermal environments.
Can the INA186A4QDBVRQ1 operate from a 1.8-V supply?
Yes, the INA186A4QDBVRQ1 is fully specified to operate from 1.7 V to 5.5 V supply voltage. At 1.8 V, it maintains 200 V/V gain, ±50 µV offset, 120 dB CMRR, and 33 kHz bandwidth. Quiescent current remains at 48 µA typical, and output swing is guaranteed to GND +1 mV and VS –40 mV-making it compatible with modern low-voltage microcontrollers in automotive domains.
Is the ENABLE pin available on the INA186A4QDBVRQ1 package?
Yes, the ENABLE pin is present on the INA186A4QDBVRQ1 because it uses the SC70-6 (DCK) package, which includes ENABLE as Pin 2 per Figure 5-1 and Table 5-1. Driving ENABLE to VS enables normal operation; pulling it to GND places the device in shutdown mode with 10 nA quiescent current and high-impedance output-confirmed in Sections 5 and 7.3.3 of the datasheet.
INA186A4QDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.3V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 33 kHz
- Current - Input Bias:
- 500 pA
- Voltage - Input Offset:
- 3 µV
- Current - Supply:
- 48µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 1.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
INA186A4QDBVRQ1 FAQ
1.How can I place an order for INA186A4QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA186A4QDBVRQ1 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 INA186A4QDBVRQ1 reliable?
The price and inventory of INA186A4QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA186A4QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for INA186A4QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA186A4QDBVRQ1 transactions.
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4.How is shipping managed for INA186A4QDBVRQ1?
INA186A4QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA186A4QDBVRQ1 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 INA186A4QDBVRQ1?
For technical support, including INA186A4QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA186A4QDBVRQ1 requirements.
6.How does Aetrix verify that INA186A4QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All INA186A4QDBVRQ1 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 INA186A4QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of INA186A4QDBVRQ1?
All INA186A4QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA186A4QDBVRQ1, 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 INA186A4QDBVRQ1 part is unused and in its original packaging.
Return procedure for INA186A4QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA186A4QDBVRQ1 Tags
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LM358DT
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Microchip Technology
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Texas Instruments
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Texas Instruments
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