My Inquiry
My Account
Texas Instruments INA186A4QDCKRQ1
- Part No.:
- INA186A4QDCKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
INA186A4QDCKRQ1.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,964
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
INA186A4QDCKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive current-sense amplifier with 200 V/V fixed gain, ±50 µV max offset voltage, 120 dB minimum CMRR, and bidirectional sensing capability enabled by its REF pin. It operates from 1.7 V to 5.5 V supply, supports –0.2 V to +40 V common-mode input range, and delivers 48 µA typical quiescent current - designed for precision battery current monitoring in 12-V automotive systems.
For engineers reviewing the INA186A4QDCKRQ1 datasheet, INA186A4QDCKRQ1 pinout, INA186A4QDCKRQ1 application, or INA186A4QDCKRQ1 equivalent, key selection criteria include its picoampere-level input bias current (500 pA typ), enable-controlled low-power mode, SC70-6 package compatibility with bidirectional sensing, and functional safety documentation support for ASIL-B system integration.
Technical Context
The INA186A4QDCKRQ1 uses a capacitively coupled front-end architecture to achieve high common-mode rejection (120 dB min) while enabling operation with input voltages up to 42 V absolute maximum - independent of its 1.7–5.5 V supply rail. Its zero-drift topology ensures ±50 µV offset and 0.5 µV/°C drift, supporting accurate microamp-range current measurement via larger sense resistors.
It implements bidirectional sensing through external REF voltage biasing (0 V to VS), with output swing specified as GND + 1 mV to VS – 40 mV. The ENABLE pin (present only in DDF package) is absent in this SC70-6 variant; instead, the DCK package provides REF and IN± terminals to support true bidirectional operation without enable control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 200 V/V - sets full-scale output for 10-mV shunt drop at 2 V output; enables use of 10-mΩ resistor for 200-A full-scale with 1% gain error. |
| Offset Voltage | ±50 µV max - limits current measurement error to ≤0.5% at 10-mV sense voltage; critical for low-current accuracy. |
| CMRR | 120 dB min - rejects 40-V battery transients with <0.1-µV offset shift; essential for stable readings during load dump. |
| Input Bias Current | 500 pA typical - permits ≥10-kΩ RC filter on inputs without degrading accuracy; supports noise filtering in noisy automotive environments. |
| Supply Range | 1.7 V to 5.5 V - allows direct interface with 1.8-V or 3.3-V microcontrollers; eliminates need for level-shifting circuitry. |
| Operating Temp | –40°C to +125°C - qualified for under-hood BCM and BMS locations per AEC-Q100 Grade 1. |
| Bandwidth | 33 kHz - sufficient for transient detection in battery protection circuits and motor phase current sampling. |
Pinout & Package
The INA186A4QDCKRQ1 is housed in a 6-pin SC70 package (2.00 mm × 1.25 mm body size), optimized for space-constrained automotive modules. It includes dedicated REF and IN± pins to enable true bidirectional current sensing without external op-amps or level-shifters.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF | Analog reference input | Bias point for bidirectional output: 0 V → unidirectional; mid-supply → symmetric ±current range. |
| OUT | Analog voltage output | 200×(IN+ − IN−) + VREF; rail-to-rail swing (GND +1 mV to VS −40 mV) maximizes dynamic range at 1.8-V supply. |
| GND | Analog ground reference | Return path for internal amplifiers and bias networks; must be low-impedance connection to system ground plane. |
| VS | Power supply input | 1.7–5.5 V single supply; powers internal amplifiers and bias circuits; bypass capacitor required at pin. |
| IN+ | Positive current-sense input | Connects to high-side bus or low-side load; accepts common-mode up to +40 V regardless of VS. |
| IN− | Negative current-sense input | Connects to low-side ground or high-side load; differential input handles ±100-mV full-scale for 200× gain. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing with REF pin | Enables single-device monitoring of charge/discharge currents in 12-V BMS without polarity-switching circuitry. |
| 500-pA input bias current | Allows use of 100-kΩ/100-pF RC filters on IN+/IN− to suppress >100-kHz EMI without introducing gain/offset errors. |
| ±50-µV offset voltage | Supports accurate measurement down to 250 µA with 100-mΩ shunt (50-µV / 100-mΩ = 500 µA full-scale error floor). |
| 120-dB CMRR | Maintains <1-µV offset shift during 40-V battery load dump events, ensuring uninterrupted current reporting in safety-critical BCMs. |
| AEC-Q100 Grade 1 qualification | Validated for continuous operation at +125°C ambient - suitable for placement near power electronics in engine compartments. |
Applications
| Body Control Module (BCM) | 12-V Battery Management System |
|---|---|
Use Scenario: Real-time monitoring of door lock actuator, headlight, and HVAC load currents to detect short circuits and open loads. IC Role / Device Role / Timing Role: High-side current-sense amplifier interfacing directly to 12-V battery rail; outputs analog voltage to MCU ADC. Use Value: 200× gain and ±50-µV offset enable detection of 50-mA fault currents with <2% error, improving diagnostic coverage for ISO 26262 ASIL-B compliance. | Use Scenario: Bidirectional current measurement across battery shunt to track state-of-charge and detect parasitic drain during vehicle sleep mode. IC Role / Device Role / Timing Role: Bidirectional current-sense amplifier with REF biased to 1.25 V (for 3.3-V MCU); measures ±100-A range with single-ended output. Use Value: 500-pA input bias current allows use of 10-mΩ shunt with <10-mW loss at 100-A, extending battery standby time while maintaining µA-level resolution. |
| Telematics Control Unit | Automotive Head Unit |
Use Scenario: Monitoring power consumption of LTE modem, GNSS receiver, and CAN transceivers to trigger low-power states during cellular handover. IC Role / Device Role / Timing Role: Low-quiescent-current (48 µA) current monitor on 3.3-V domain; interfaces to MCU via 12-bit ADC with 100-µs update rate. Use Value: 33-kHz bandwidth captures burst-mode current transients from modem RF transmission, enabling precise energy accounting for OTA firmware updates. | Use Scenario: Detecting overcurrent conditions in Class-D audio amplifier power stages and USB-C charging ports to prevent thermal shutdown. IC Role / Device Role / Timing Role: High-side current sensor on 12-V supply rail feeding audio subsystem; outputs to protection logic comparator. Use Value: 42-V absolute maximum input rating withstands load-dump transients up to 42 V, eliminating need for external TVS diodes in compact head unit PCB layout. |
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 | 100 V/V gain, 80-µV offset, no REF pin, SOT-23-8 package | Unidirectional only; requires external circuitry for bidirectional sensing | Select when bidirectional capability is unnecessary and higher bandwidth (400 kHz) is required for motor control. |
| MAX40016ATA+T | 200 V/V gain, 125-µV offset, 1.6-V to 5.5-V supply, SC70-6 package | No AEC-Q100 qualification; lacks functional safety documentation | Select for non-automotive industrial applications where cost sensitivity outweighs automotive qualification requirements. |
Compared with INA240A1QDRQ1 and MAX40016ATA+T, the INA186A4QDCKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, bidirectional sensing via REF pin, and 500-pA input bias current in SC70-6 - making it the only option that meets full ASIL-B system requirements for 12-V battery monitoring without design compromises.
Availability
INA186A4QDCKRQ1 is available at Aetrix Electronics and suitable for body control modules, 12-V battery management systems, and telematics control units requiring stable component supply across automotive production lifecycles.
Supply support for INA186A4QDCKRQ1 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 signal conditioning and power management ICs.
The INA186-Q1 product line was developed specifically for high-precision, low-power current sensing in automotive 12-V battery-connected systems - emphasizing picoampere input bias, AEC-Q100 qualification, and functional safety readiness.
FAQ
What is the maximum common-mode voltage the INA186A4QDCKRQ1 can withstand?
The INA186A4QDCKRQ1 supports a continuous common-mode input range of –0.2 V to +40 V and survives transient voltages up to +42 V on IN+ and IN– pins. This rating is independent of the 1.7–5.5 V supply voltage, enabling direct connection to automotive 12-V battery rails even during load-dump events. The absolute maximum rating of 42 V is defined in Section 6.1 of the datasheet and applies to both pins referenced to GND.
Does the INA186A4QDCKRQ1 support bidirectional current sensing?
Yes, the INA186A4QDCKRQ1 supports bidirectional current sensing via its dedicated REF pin, which is present in the SC70-6 (DCK) package. Applying a mid-supply voltage (e.g., 1.25 V for 2.5-V system) to REF centers the output voltage, allowing positive differential inputs to increase OUT and negative inputs to decrease OUT. This capability is confirmed in Section 7.3.4 and Figure 7-2 of the datasheet.
What is the gain error specification for the INA186A4QDCKRQ1?
The INA186A4QDCKRQ1 has a maximum gain error of ±1% across temperature (–40°C to +125°C) and supply voltage (1.7 V to 5.5 V), as specified in Section 6.5 Electrical Characteristics. This error defines the dominant source of inaccuracy when measuring large currents near full-scale output, and is verified for the A4 variant (200 V/V) under all recommended operating conditions.
Is the ENABLE pin available on the INA186A4QDCKRQ1?
No, the ENABLE pin is not available on the INA186A4QDCKRQ1. It is exclusive to the 8-pin SOT-23 (DDF) package variant (e.g., INA186A4QDDFRQ1). The SC70-6 (DCK) package used for INA186A4QDCKRQ1 omits ENABLE but retains REF and IN± pins to support bidirectional operation without enable functionality.
What package type and dimensions does the INA186A4QDCKRQ1 use?
INA186A4QDCKRQ1 uses the SC70-6 (DCK) package with nominal body dimensions of 2.00 mm × 1.25 mm and a maximum height of 0.95 mm. This information is documented in Table 3-1 (Device Information) and Section 12 (Mechanical, Packaging, and Orderable Information) of the datasheet, confirming compatibility with fine-pitch automotive PCB assembly processes.
INA186A4QDCKRQ1 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:
- 33 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
INA186A4QDCKRQ1 FAQ
1.How can I place an order for INA186A4QDCKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA186A4QDCKRQ1 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 INA186A4QDCKRQ1 reliable?
The price and inventory of INA186A4QDCKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA186A4QDCKRQ1 is usually 5 days.
3.What payment methods are accepted for INA186A4QDCKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA186A4QDCKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA186A4QDCKRQ1?
INA186A4QDCKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA186A4QDCKRQ1 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 INA186A4QDCKRQ1?
For technical support, including INA186A4QDCKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA186A4QDCKRQ1 requirements.
6.How does Aetrix verify that INA186A4QDCKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA186A4QDCKRQ1 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 INA186A4QDCKRQ1 meets industry standards.
7.What is the process for return or replacement of INA186A4QDCKRQ1?
All INA186A4QDCKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA186A4QDCKRQ1, 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 INA186A4QDCKRQ1 part is unused and in its original packaging.
Return procedure for INA186A4QDCKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA186A4QDCKRQ1 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
