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Texas Instruments INA186A5QDCKRQ1
- Part No.:
- INA186A5QDCKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
INA186A5QDCKRQ1.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:25,809
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Product details
Overview
INA186A5QDCKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive current-sense amplifier optimized for bidirectional 12-V battery monitoring. It delivers 500 V/V fixed gain, ±1% max gain error, ±50 µV max offset voltage, and 120 dB minimum CMRR across –40°C to +125°C. Its 500 pA typical input bias current enables microamp-level current measurement in body control modules and telematics units.
For engineers reviewing the INA186A5QDCKRQ1 datasheet, INA186A5QDCKRQ1 pinout, INA186A5QDCKRQ1 application, or INA186A5QDCKRQ1 equivalent, key selection criteria include its 40-V common-mode range (–0.2 V to +40 V), 48 µA typical quiescent current, SC70-6 package with REF/ENABLE support, and functional safety documentation for ISO 26262-compliant systems.
Technical Context
The INA186A5QDCKRQ1 uses a capacitively coupled front-end architecture to achieve high common-mode rejection (120 dB min) independent of supply voltage, enabling accurate sensing at bus voltages up to 40 V while operating from 1.7 V to 5.5 V. Its zero-drift topology ensures 0.5 µV/°C max offset drift and supports bidirectional operation via externally applied REF voltage.
This device implements unidirectional or bidirectional current sensing through configurable REF pin biasing: grounded for unidirectional output near GND, or mid-supply for symmetric ±current detection. The ENABLE pin (present in DDF but not DCK) allows low-power duty-cycled operation; however, the DCK package relies on VS/GND connection for enable control per functional mode definition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 500 V/V - sets full-scale output for 2-mV sense voltage to 1 V, enabling high-resolution microamp current detection with standard ADCs. |
| Common-mode range | –0.2 V to +40 V - supports direct connection to automotive 12-V battery rails, including cold-crank and load-dump transients up to 42 V survivability. |
| Input bias current | 500 pA typical - permits use of high-value shunt resistors (>1 kΩ) without significant error, critical for ultra-low-current monitoring in eCall standby. |
| Quiescent current | 48 µA typical - enables always-on current monitoring in BCMs with minimal impact on battery drain over extended parking periods. |
| Offset voltage | ±50 µV maximum - extends dynamic range to sub-millivolt differential signals, allowing smaller shunts (e.g., 1 mΩ) with <100 µW power loss at 10 A. |
| CMRR | 120 dB minimum - rejects noise from shared ground paths in head units and BMS, maintaining accuracy during simultaneous high-current switching events. |
| Operating temp | –40°C to +125°C - qualified for under-hood and infotainment locations where ambient temperature exceeds 105°C. |
Pinout & Package
The INA186A5QDCKRQ1 is housed in a 6-pin SC70 package (2.00 mm × 1.25 mm body size) with wettable flanks, suitable for automated optical inspection. This variant includes REF and ENABLE functionality as defined in the DCK pinout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF | Analog reference input | Enables bidirectional sensing when biased to mid-supply; grounded for unidirectional output near GND; absent in DBV variant. |
| OUT | Analog voltage output | Delivers 500×(IN+ − IN−) + VREF; rail-to-rail swing (GND +1 mV / VS −40 mV) maximizes usable range on 1.8-V supplies. |
| GND | Analog ground reference | Return path for internal circuitry and external bypass capacitor; must be low-impedance to minimize PSRR degradation. |
| VS | Power supply input | Accepts 1.7–5.5 V; powers internal amplifiers and bias networks; decoupling with 0.1 µF ceramic required at pin. |
| IN− | Negative current-sense input | Connects to load side of shunt in high-side config or ground side in low-side config; withstands −0.2 V to +40 V absolute. |
| IN+ | Positive current-sense input | Connects to bus side of shunt in high-side config or load side in low-side config; same voltage rating as IN−. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing capability | Enabled by REF pin: ±10-mV differential input yields ±5-V output swing around VREF, supporting regenerative braking and battery charge/discharge monitoring. |
| Picoampere input bias | 500 pA typical eliminates shunt resistor self-heating error and enables stable filtering with RC networks >100 kΩ without gain/phase shift. |
| Functional safety support | Documentation available for FMEDA and safety analysis per ISO 26262 ASIL-B requirements in automotive power distribution systems. |
| High common-mode survivability | Withstands 42-V transients per AEC-Q100 stress testing, eliminating need for external clamping diodes in 12-V BMS front-end designs. |
| Zero-drift architecture | 0.5 µV/°C max offset drift maintains calibration stability across engine bay thermal cycles without periodic auto-zeroing. |
Applications
| Body Control Module (BCM) | Telematics Control Unit |
|---|---|
Use Scenario: Monitoring door lock actuator current to detect jamming or motor stall during automatic entry. IC Role / Device Role / Timing Role: Current-sense amplifier converting shunt voltage to scaled analog output for MCU ADC sampling at 1 kHz. Use Value: 500 pA input bias prevents false stall detection caused by leakage across dirty connectors; ±50 µV offset enables reliable 50-mA threshold detection. | Use Scenario: Detecting GPS module sleep/wake transitions via supply current signature in always-on vehicle tracking systems. IC Role / Device Role / Timing Role: High-precision current monitor feeding diagnostic data to CAN controller during low-power states. Use Value: 48 µA quiescent current minimizes parasitic drain; 40-V CM range tolerates battery voltage fluctuations during ignition-off monitoring. |
| Emergency Call (eCall) | 12-V Battery Management System |
Use Scenario: Verifying backup battery health by measuring self-discharge current during vehicle park mode. IC Role / Device Role / Timing Role: Ultra-low-current sensor interfaced to low-power SAR ADC for periodic 100-nA resolution measurements. Use Value: 500 pA input bias allows use of 10-kΩ shunt for 100-nA full scale, achieving 10-nA resolution without external amplification. | Use Scenario: Measuring charge/discharge current in start-stop systems with regenerative braking feedback. IC Role / Device Role / Timing Role: Bidirectional current amplifier with REF pin biased to VS/2 for symmetric ±5-A sensing range. Use Value: 500 V/V gain converts ±2-mV shunt drop to ±1-V output, matching standard ADC input ranges while maintaining 120 dB CMRR against alternator noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A5QDRQ1 | Higher bandwidth (400 kHz vs. 27 kHz), higher quiescent current (2.4 mA vs. 48 µA), no REF pin, SOT-23-8 package. | Optimized for motor phase current sensing with fast transient response; unsuitable for ultra-low-power eCall standby monitoring. | Select INA240A5QDRQ1 only when >100-kHz bandwidth is required and system power budget allows >50× higher IQ. |
| MAX40056ATA+T | Lower gain (100 V/V), wider supply range (2.7–5.5 V), no ENABLE, 6-pin WLP package, 100 nA IB. | Targeted at space-constrained portable medical devices; lacks AEC-Q100 qualification and automotive temp range. | Choose MAX40056ATA+T only for non-automotive industrial applications requiring smallest footprint and lower cost, accepting reduced gain and temp range. |
Compared with INA240A5QDRQ1 and MAX40056ATA+T, the INA186A5QDCKRQ1 uniquely balances ultra-low IQ, picoamp IB, AEC-Q100 Grade 1 qualification, and REF-enabled bidirectionality in a 2.0 × 1.25 mm SC70 package-making it the sole option for always-on, microamp-resolution automotive current monitoring.
Availability
INA186A5QDCKRQ1 is available at Aetrix Electronics and suitable for body control modules, telematics control units, emergency call systems, and 12-V battery management systems requiring stable component supply across automotive production lifecycles.
Supply support for INA186A5QDCKRQ1 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 automotive-grade precision analog solutions.
The INA186-Q1 product line was designed specifically for high-accuracy, low-power current sensing in automotive 12-V battery-connected systems-including BCMs, telematics, and BMS-where picoampere input bias and AEC-Q100 qualification are mandatory.
FAQ
What is the maximum common-mode voltage the INA186A5QDCKRQ1 can withstand continuously?
The INA186A5QDCKRQ1 operates continuously across a common-mode voltage range of –0.2 V to +40 V. Its absolute maximum rating allows survival at 42 V, making it suitable for automotive 12-V battery applications exposed to load-dump transients. This specification is validated per AEC-Q100 stress testing and applies directly to the INA186A5QDCKRQ1 in its SC70 package configuration.
Does the INA186A5QDCKRQ1 support bidirectional current sensing, and how is it implemented?
Yes, the INA186A5QDCKRQ1 supports bidirectional current sensing using its REF pin. When a reference voltage (e.g., VS/2) is applied to REF, positive differential input (IN+ > IN−) produces OUT > VREF, and negative differential input produces OUT < VREF. This feature is enabled in the DCK package and is explicitly documented for the INA186A5QDCKRQ1 in TI's SBOS386B datasheet Section 7.3.4.
What is the gain error specification for the INA186A5QDCKRQ1, and how does it affect measurement accuracy?
The INA186A5QDCKRQ1 has a maximum gain error of ±1% across –40°C to +125°C. At full-scale output, this contributes directly to total current measurement error-for example, with a 1-mΩ shunt and 10-A load, a ±1% gain error introduces ±10 mA uncertainty. This value is guaranteed in production test and applies specifically to the INA186A5QDCKRQ1 variant per Table 6-5 of the official datasheet.
How does the input bias current of the INA186A5QDCKRQ1 compare to conventional current-sense amplifiers, and why does it matter?
The INA186A5QDCKRQ1 features 500 pA typical input bias current-up to 1000× lower than typical CMOS-input current-sense amplifiers. This enables accurate measurement of currents below 100 µA using high-value shunts (e.g., 10 kΩ), avoids self-heating errors in precision BMS applications, and permits stable RC filtering without degrading gain accuracy. This parameter is measured and specified for the INA186A5QDCKRQ1 in Section 6.5 of SBOS386B.
Is the INA186A5QDCKRQ1 qualified for automotive use, and what standards does it meet?
Yes, the INA186A5QDCKRQ1 is AEC-Q100 qualified for automotive applications (Grade 1: –40°C to +125°C TA) and is functional safety-capable with documentation available for ISO 26262 system design. It meets HBM ESD classification Level 2 (±3000 V) and CDM Level C6 (±1000 V), as verified in TI's official qualification report and published in the SBOS386B datasheet Sections 1 and 6.2.
INA186A5QDCKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- 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:
- Rail-to-Rail
- Slew Rate:
- 0.3V/µs
- Gain Bandwidth Product:
- 27 kHz
- -3db Bandwidth:
- -
- 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:
- SC-70-6
INA186A5QDCKRQ1 FAQ
1.How can I place an order for INA186A5QDCKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA186A5QDCKRQ1 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 INA186A5QDCKRQ1 reliable?
The price and inventory of INA186A5QDCKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA186A5QDCKRQ1 is usually 5 days.
3.What payment methods are accepted for INA186A5QDCKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA186A5QDCKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA186A5QDCKRQ1?
INA186A5QDCKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA186A5QDCKRQ1 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 INA186A5QDCKRQ1?
For technical support, including INA186A5QDCKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA186A5QDCKRQ1 requirements.
6.How does Aetrix verify that INA186A5QDCKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA186A5QDCKRQ1 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 INA186A5QDCKRQ1 meets industry standards.
7.What is the process for return or replacement of INA186A5QDCKRQ1?
All INA186A5QDCKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA186A5QDCKRQ1, 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 INA186A5QDCKRQ1 part is unused and in its original packaging.
Return procedure for INA186A5QDCKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA186A5QDCKRQ1 Tags
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Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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