My Inquiry
My Account
Texas Instruments INA190A2QDCKRQ1
- Part No.:
- INA190A2QDCKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
INA190A2QDCKRQ1.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:7,531
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
INA190A2QDCKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive current-sense amplifier optimized for bidirectional microamp-precision sensing in 12-V battery-connected systems. It delivers 50 V/V fixed gain, ±15 µV max offset voltage, 132 dB min CMRR, and operates from 1.7 V to 5.5 V supply across –40°C to +125°C - enabling high-accuracy BMS and eCall power monitoring.
For engineers reviewing the INA190A2QDCKRQ1 datasheet, INA190A2QDCKRQ1 pinout, INA190A2QDCKRQ1 application, or INA190A2QDCKRQ1 equivalent, key selection criteria include picoamp input bias (500 pA typ), 100 nA max shutdown current, ±0.3% gain error (A2 variant), 37 kHz bandwidth, and SC70-6 package compatibility with high-side/low-side configurations.
Technical Context
The INA190A2QDCKRQ1 uses a capacitively coupled front-end architecture to achieve ultra-low input bias current (500 pA typ) and reject DC common-mode voltage shifts - delivering 132 dB minimum CMRR independent of supply rail. Its zero-drift topology maintains ±15 µV max offset and 80 nV/°C max drift over temperature.
This SC70-6 device supports bidirectional sensing via external REF pin biasing, accepts –0.2 V to +40 V common-mode inputs (survivable to 42 V), and features rail-to-rail output swing (GND + 1 mV / VS – 40 mV) with 50 V/V gain calibrated to ±0.3% error across –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V - fixed ratio converting shunt voltage to amplified analog output; enables precise current calculation with known RSENSE |
| Offset Voltage (VOS) | ±15 µV max - sets minimum resolvable current; allows use of low-value shunts without sacrificing light-load accuracy |
| Common-Mode Rejection (CMRR) | 132 dB min - rejects bus voltage fluctuations in automotive 12-V systems, preserving measurement integrity during load dumps |
| Input Bias Current (IIB) | 500 pA typical - permits microamp-range current sensing and minimizes error from shunt resistor self-heating |
| Supply Voltage Range | 1.7 V to 5.5 V - supports operation from single-cell Li-ion up to 5-V logic rails while maintaining full 40-V common-mode range |
| Bandwidth | 37 kHz - sufficient for transient detection in battery protection, motor control feedback, and telematics power sequencing |
| Quiescent Current | 50 µA typical - enables always-on monitoring in low-power automotive modules without excessive battery drain |
Pinout & Package
INA190A2QDCKRQ1 is packaged in a 6-pin SC70 (2.00 mm × 1.25 mm) footprint. This compact automotive-qualified package supports reflow soldering and meets AEC-Q100 thermal requirements (RθJA = 170.7°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF | Analog reference input | Sets output midpoint for bidirectional sensing; applying VS/2 enables symmetric ±ILOAD measurement around mid-supply |
| 2 - GND | Analog ground | Return path for internal circuitry and output stage; must be low-impedance to preserve PSRR and noise immunity |
| 3 - VS | Power supply | Single 1.7–5.5 V rail powering all internal stages; independent of input common-mode voltage range |
| 4 - IN+ | Positive current-sense input | Connects to bus/high-side of shunt (high-side) or load side (low-side); differential pair input with 500 pA bias |
| 5 - IN− | Negative current-sense input | Connects to load/ground side of shunt (high-side) or ground (low-side); matched to IN+ for CMRR optimization |
| 6 - OUT | Analog output | Voltage output = GAIN × (VIN+ − VIN−) + VREF; rail-to-rail swing supports 1.8-V operation with >99% dynamic range utilization |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing support | Enabled by REF pin biasing - allows single-device monitoring of charge/discharge currents in BMS and regenerative braking circuits |
| Ultra-low input bias current | 500 pA typical - eliminates shunt error from input loading, enabling accurate sub-mA measurements with ≥1 Ω resistors |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - ensures reliability in engine bay, under-hood, and infotainment module deployments |
| Rail-to-rail output swing | GND + 1 mV / VS – 40 mV - maximizes ADC resolution when interfacing with 12-bit microcontrollers operating at 1.8 V or 3.3 V |
| High common-mode survivability | Withstands 42 V absolute max on IN+/IN− - protects against load dump transients in 12-V automotive electrical systems |
Applications
| Body Control Module (BCM) | Telematics Control Unit |
|---|---|
Use Scenario: Real-time monitoring of door lock actuators, lighting loads, and HVAC fan motors powered from 12-V battery. IC Role / Device Role / Timing Role: Current-sense amplifier measuring shunt voltage drop to detect open-circuit faults, overcurrent conditions, and motor stall events. Use Value: ±15 µV offset enables detection of <1 mA fault currents; 132 dB CMRR rejects alternator ripple and ignition noise during operation. |
Use Scenario: Power supervision of LTE modem, GNSS receiver, and CAN transceiver subsystems in connected vehicle gateways. IC Role / Device Role / Timing Role: Bidirectional current monitor on main 12-V input rail to track system-level sleep/wake current transitions and detect parasitic drain. Use Value: 500 pA input bias prevents measurement error from leakage paths; 100 nA shutdown current ensures compliance with ISO 16750-2 quiescent current limits. |
| Emergency Call (eCall) | Battery Management System (BMS) |
Use Scenario: Monitoring backup power path (supercapacitor or coin cell) during main battery disconnect or crash event. IC Role / Device Role / Timing Role: High-side current sensor verifying energy availability and health of emergency power source prior to GSM transmission. Use Value: –0.2 V to +40 V common-mode range accommodates supercap discharge down to near-zero volts while rejecting battery reversal transients. |
Use Scenario: Cell-level or pack-level current sensing in 12-V auxiliary battery systems for start-stop and ADAS power management. IC Role / Device Role / Timing Role: Precision shunt amplifier feeding ADC in microcontroller-based coulomb counting and state-of-charge estimation. Use Value: ±0.3% gain error and 80 nV/°C drift ensure <1% cumulative current integration error over full automotive temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A2QDRQ1 | Higher gain error (±0.6%), higher IIB (±25 nA), no REF pin - unidirectional only | Lacks bidirectional capability and microamp sensing; suited for high-current (>1 A) motor phase sensing | Select if unidirectional high-side sensing suffices and ±0.6% gain error is acceptable for your BOM tolerance stack-up |
| MAX40010FAUA+ | Lower bandwidth (20 kHz), higher VOS (±100 µV), same 50 V/V gain, SC70-6 package | Not AEC-Q100 qualified; limited to industrial/commercial temperature range (–40°C to +125°C not guaranteed) | Consider only for non-automotive designs where AEC-Q100 compliance is not required and 100 µV offset is tolerable |
Compared with INA240A2QDRQ1 and MAX40010FAUA+, the INA190A2QDCKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, bidirectional operation via REF pin, 500 pA input bias, and ±15 µV offset - making it the only option for automotive-grade microamp-precision current monitoring in space-constrained SC70 layouts.
Availability
INA190A2QDCKRQ1 is available at Aetrix Electronics and suitable for body control modules, telematics units, emergency call systems, and battery management systems requiring stable component supply across automotive production lifecycles.
Supply support for INA190A2QDCKRQ1 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 INA190-Q1 product line is engineered specifically for AEC-Q100-compliant, ultra-precise current sensing in automotive battery-connected systems - targeting applications demanding picoamp input bias, wide common-mode range, and bidirectional capability.
FAQ
What is the maximum common-mode voltage the INA190A2QDCKRQ1 can withstand?
The INA190A2QDCKRQ1 supports a continuous common-mode input range of –0.2 V to +40 V and survives transient voltages up to 42 V on its IN+ and IN– pins. This enables direct connection to 12-V automotive battery rails while maintaining accuracy during load dump events defined in ISO 7637-2.
Does the INA190A2QDCKRQ1 support bidirectional current sensing?
Yes, the INA190A2QDCKRQ1 supports bidirectional current sensing through its dedicated REF pin. Applying a reference voltage (e.g., VS/2) to REF centers the output voltage, allowing positive and negative differential inputs to produce outputs above and below that reference - essential for charge/discharge monitoring in BMS and eCall backup power paths.
What is the gain error specification for the INA190A2QDCKRQ1?
The INA190A2QDCKRQ1 has a gain error of ±0.3% maximum across temperature (–40°C to +125°C). This applies specifically to the A2 variant (50 V/V gain) and is tighter than the ±0.4% spec for the A5 variant, ensuring predictable scaling between shunt voltage and output for precision current reconstruction.
Is the INA190A2QDCKRQ1 available in a package with an ENABLE pin?
No - the INA190A2QDCKRQ1 uses the SC70-6 (DCK) package, which does not include an ENABLE pin. The ENABLE function is only available in the 8-pin SOT-23 (DDF) variant (e.g., INA190A2QDDFRQ1). For low-power shutdown, consider the DDF version or external enable circuitry with the DCK variant.
What is the typical input bias current of the INA190A2QDCKRQ1?
The typical input bias current of the INA190A2QDCKRQ1 is 500 pA at 25°C, with a maximum of 3 nA over temperature. This ultra-low value enables accurate microamp-range current measurements and minimizes error contributions from shunt resistor self-heating or PCB leakage paths.
INA190A2QDCKRQ1 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:
- 37 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
INA190A2QDCKRQ1 FAQ
1.How can I place an order for INA190A2QDCKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA190A2QDCKRQ1 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 INA190A2QDCKRQ1 reliable?
The price and inventory of INA190A2QDCKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA190A2QDCKRQ1 is usually 5 days.
3.What payment methods are accepted for INA190A2QDCKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA190A2QDCKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA190A2QDCKRQ1?
INA190A2QDCKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA190A2QDCKRQ1 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 INA190A2QDCKRQ1?
For technical support, including INA190A2QDCKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA190A2QDCKRQ1 requirements.
6.How does Aetrix verify that INA190A2QDCKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA190A2QDCKRQ1 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 INA190A2QDCKRQ1 meets industry standards.
7.What is the process for return or replacement of INA190A2QDCKRQ1?
All INA190A2QDCKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA190A2QDCKRQ1, 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 INA190A2QDCKRQ1 part is unused and in its original packaging.
Return procedure for INA190A2QDCKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA190A2QDCKRQ1 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…
