My Inquiry
My Account
Texas Instruments INA186A1QDBVRQ1
- Part No.:
- INA186A1QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
INA186A1QDBVRQ1.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,937
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
INA186A1QDBVRQ1 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 25 V/V fixed gain, ±50 µV max offset voltage, 120 dB min CMRR, and operates from 1.7–5.5 V supply across –40°C to +125°C.
For engineers reviewing the INA186A1QDBVRQ1 datasheet, INA186A1QDBVRQ1 pinout, INA186A1QDBVRQ1 application, or INA186A1QDBVRQ1 equivalent, this page provides verified technical context, package-specific pin functions, real-world automotive use cases, and validated alternative options for high-precision, low-power current sensing in safety-critical systems.
Technical Context
The INA186A1QDBVRQ1 uses a capacitively coupled front-end architecture to achieve 120 dB minimum common-mode rejection and block DC common-mode voltages-enabling accurate sensing at –0.2 V to +40 V common-mode while powered from as low as 1.7 V. Its zero-drift topology ensures ±50 µV max offset and 0.5 µV/°C max drift, extending dynamic range for microamp-level current measurement.
This DBV (SOT-23-5) variant lacks ENABLE and REF pins, supporting unidirectional current sensing only. Input bias current is 500 pA typical, quiescent current is 48 µA typical, and output swing reaches GND + 1 mV and VS – 40 mV-critical for low-voltage 1.8-V operation in space-constrained automotive PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 25 V/V fixed-sets output scaling for 40-mV full-scale shunt drop to 1-V output, simplifying ADC interface design. |
| Offset Voltage | ±50 µV maximum-enables accurate sub-100-mA current measurement with 10-mΩ shunt at 1.8-V supply. |
| CMRR | 120 dB minimum-rejects battery rail noise and load transients in 12-V systems without calibration. |
| Supply Range | 1.7 V to 5.5 V-supports direct connection to low-voltage MCU I/O rails or LDO outputs without level shifting. |
| Operating Temp | –40°C to +125°C-qualified per AEC-Q100 Grade 1 for under-hood and cabin-mounted automotive ECUs. |
| Input Bias Current | 500 pA typical-permits use of high-value sense resistors (>1 Ω) for µA-range leakage detection. |
| Quiescent Current | 48 µA typical-minimizes standby power in always-on telematics and eCall modules. |
Pinout & Package
INA186A1QDBVRQ1 is packaged in a 5-pin SOT-23 (DBV) case measuring 2.90 mm × 1.60 mm, optimized for high-density automotive PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Analog ground reference | Single-point return path for input stage and output buffer; must be tied to system power ground near shunt resistor. |
| OUT | Analog voltage output | Provides 25×(VIN+ – VIN–) output referenced to GND; drives 10-kΩ loads with rail-to-rail swing. |
| VS | Power supply input | Accepts 1.7–5.5 V; powers internal amplifiers and bias networks; bypass capacitor 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. |
| 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 |
|---|---|
| Zero-drift architecture | Delivers ±50 µV max offset and 0.5 µV/°C max drift-enables stable µA-level current measurement over full automotive temperature range. |
| Capacitive-coupled input stage | Blocks DC common-mode voltage up to 40 V while rejecting >120 dB of rail noise-eliminates need for external CMR compensation networks. |
| Ultra-low input bias current | 500 pA typical allows use of ≥1-Ω shunts for microamp leakage detection without signal degradation from parallel leakage paths. |
| Rail-to-rail output | Swings to GND + 1 mV and VS – 40 mV-maximizes usable dynamic range on 1.8-V supplies, improving ADC effective resolution by ≥1 LSB. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation with robust ESD (HBM ±3 kV) and thermal performance-meets functional safety readiness requirements for ASIL-B systems. |
Applications
| Body Control Module (BCM) | Telematics Control Unit |
|---|---|
Use Scenario: Real-time monitoring of door lock actuators, lighting loads, and HVAC fan currents in 12-V vehicle electrical architecture. IC Role / Device Role / Timing Role: Unidirectional current-sense amplifier measuring shunt voltage drop across high-side switches to detect open-circuit, short-circuit, and overcurrent faults. Use Value: ±1% gain error and ±50 µV offset enable reliable fault thresholding at <100 mA with 10-mΩ shunt-reducing false triggers during cold cranking transients. | Use Scenario: Continuous battery discharge tracking and load profiling in connected vehicle gateways with always-on cellular and GNSS receivers. IC Role / Device Role / Timing Role: Low-quiescent-current current monitor on main 12-V input rail, feeding analog data to MCU ADC for state-of-charge estimation. Use Value: 48 µA typical IQ and 1.7-V minimum supply allow operation directly from buck converter output-extending backup battery life during ignition-off periods. |
| Emergency Call (eCall) | 12-V Battery Management System |
Use Scenario: Detecting abnormal current draw during pre-crash sensor activation and post-impact communication handshaking in EU eCall-compliant modules. IC Role / Device Role / Timing Role: High-accuracy current sensor on GSM/LTE power rail, triggering wake-up and diagnostic logging when current exceeds programmable thresholds. Use Value: 120 dB CMRR rejects RF coupling and switching noise from nearby power converters-ensuring clean current signatures for AI-based anomaly detection algorithms. | Use Scenario: Monitoring charge/discharge currents in auxiliary battery circuits for start-stop systems and 48-V/12-V DC-DC converters. IC Role / Device Role / Timing Role: Bidirectional-capable amplifier (via REF pin in other variants) measuring net current flow into/out of lead-acid or LiFePO₄ auxiliary battery. Use Value: While INA186A1QDBVRQ1 is unidirectional, its 25 V/V gain and 40-V common-mode range support precise high-side sensing of charging currents up to 50 A with 2-mΩ shunt. |
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 | Higher 80-V common-mode range, 125-ppm/°C gain drift, no REF pin, 100-µA IQ | Better suited for 48-V HEV/EV subsystems; less precise at microamp levels due to higher offset (±100 µV) | Select for 48-V battery monitoring where extended voltage range outweighs precision loss. |
| MAX40010FAUA+T | 20-V common-mode max, ±125 µV offset, 200-µA IQ, integrated 500-Ω gain-setting resistor | Optimized for low-cost, low-voltage consumer BMS; not AEC-Q100 qualified | Choose for non-automotive cost-sensitive designs requiring minimal external components. |
Compared with INA186A1QDBVRQ1, INA240A1QDRQ1 trades lower offset and quiescent current for wider voltage tolerance and higher drift, while MAX40010FAUA+T sacrifices automotive qualification and precision for integration and price-making INA186A1QDBVRQ1 optimal for AEC-Q100-compliant 12-V systems demanding µA-level accuracy and low standby power.
Availability
INA186A1QDBVRQ1 is available at Aetrix Electronics and suitable for body control modules, telematics control units, and emergency call (eCall) systems requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100-compliant traceability.
Supply support for INA186A1QDBVRQ1 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 for automotive, industrial, and personal electronics markets.
The INA186-Q1 product line targets high-precision, low-power current sensing in automotive battery-connected systems-designed specifically for 12-V BCM, telematics, and safety-critical monitoring where accuracy, temperature stability, and functional safety readiness are mandatory.
FAQ
What is the maximum common-mode voltage supported by the INA186A1QDBVRQ1?
The INA186A1QDBVRQ1 supports a common-mode input voltage range of –0.2 V to +40 V, with absolute maximum survivability up to 42 V. This enables direct connection to automotive 12-V battery rails-including during load dump events-without external protection circuitry. The device maintains specified performance across this range independent of its 1.7–5.5 V supply voltage.
Does the INA186A1QDBVRQ1 support bidirectional current sensing?
No, the INA186A1QDBVRQ1 in the DBV (SOT-23-5) package does not support bidirectional current sensing because it lacks the REF pin required to set a mid-supply output offset. Bidirectional capability is available only in SC70 (DCK) and DDF (SOT-23-8) variants that include the REF terminal. The INA186A1QDBVRQ1 is configured for unidirectional measurement with output referenced to GND.
What is the gain error specification for the INA186A1QDBVRQ1?
The INA186A1QDBVRQ1 has a maximum gain error of ±1% across –40°C to +125°C, with typical performance tighter than ±0.04%. This specification ensures predictable scaling between shunt voltage drop and output voltage-critical for calibrated current measurement in safety-relevant automotive functions like eCall fault detection and BCM load diagnostics.
Can the INA186A1QDBVRQ1 operate from a 1.8-V supply?
Yes, the INA186A1QDBVRQ1 operates from 1.7 V to 5.5 V, making 1.8-V supply fully supported. At 1.8 V, it delivers rail-to-rail output swing down to GND + 1 mV and up to VS – 40 mV, preserving >97% of full-scale dynamic range. This enables direct interfacing with 1.8-V SAR ADCs in modern low-power automotive MCUs without level-shifting circuitry.
Is the INA186A1QDBVRQ1 qualified for automotive applications?
Yes, the INA186A1QDBVRQ1 is AEC-Q100 qualified for automotive applications, rated Grade 1 (–40°C to +125°C ambient), and designed for functional safety–capable systems. It meets stringent automotive reliability, ESD (HBM ±3 kV), and thermal performance requirements-making it suitable for body control modules, telematics units, and emergency call systems deployed in production vehicles.
INA186A1QDBVRQ1 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:
- 45 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
INA186A1QDBVRQ1 FAQ
1.How can I place an order for INA186A1QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA186A1QDBVRQ1 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 INA186A1QDBVRQ1 reliable?
The price and inventory of INA186A1QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA186A1QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for INA186A1QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA186A1QDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA186A1QDBVRQ1?
INA186A1QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA186A1QDBVRQ1 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 INA186A1QDBVRQ1?
For technical support, including INA186A1QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA186A1QDBVRQ1 requirements.
6.How does Aetrix verify that INA186A1QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All INA186A1QDBVRQ1 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 INA186A1QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of INA186A1QDBVRQ1?
All INA186A1QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA186A1QDBVRQ1, 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 INA186A1QDBVRQ1 part is unused and in its original packaging.
Return procedure for INA186A1QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA186A1QDBVRQ1 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…
