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Texas Instruments INA190A5QDCKRQ1
- Part No.:
- INA190A5QDCKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
INA190A5QDCKRQ1.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,752
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Product details
Overview
INA190A5QDCKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive current-sense amplifier optimized for bidirectional microamp-level current monitoring in 12-V battery-connected systems. It delivers 500 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 shunt-based sensing in body control modules and BMS.
For engineers reviewing the INA190A5QDCKRQ1 datasheet, INA190A5QDCKRQ1 pinout, INA190A5QDCKRQ1 application, or INA190A5QDCKRQ1 equivalent, this page provides verified technical context, SC70 package mapping, real-world functional boundaries (–0.2 V to +40 V common-mode, 27 kHz bandwidth), and validated alternative options for automotive current measurement designs.
Technical Context
The INA190A5QDCKRQ1 uses a capacitively coupled front-end architecture to achieve ultra-low input bias current (0.5 nA typ) and reject DC common-mode voltage shifts - critical for stable microamp sensing under automotive bus transients. Its zero-drift design ensures 80 nV/°C max offset drift and enables accurate low-current detection with larger sense resistors.
This SC70-6 variant supports high-side and low-side configurations without supply-rail dependency: common-mode range (–0.2 V to +40 V) exceeds VS (1.7–5.5 V), and absolute input survivability reaches 42 V. The device lacks ENABLE functionality (not present in DCK package), operating continuously when powered.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 500 V/V - sets output scaling for 2 mV full-scale shunt voltage to 1 V output, enabling precise resolution at low currents. |
| Offset Voltage | ±15 µV max - limits error to ≤30 nA when using 500 Ω sense resistor, supporting sub-microamp measurement fidelity. |
| CMRR | 132 dB min - rejects >99.999% of common-mode noise from 12-V battery rail, preserving accuracy during load dumps. |
| Input Bias Current | 0.5 nA typ - permits use of ≥1 kΩ sense resistors without significant error, enabling µA-range current detection. |
| Bandwidth | 27 kHz - supports dynamic current monitoring in PWM-driven loads (e.g., motor drivers, LED dimming) up to ~1 kHz. |
| Supply Range | 1.7 V to 5.5 V - allows direct interface with 1.8-V or 3.3-V microcontrollers without level-shifting, reducing BOM count. |
| Operating Temp | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and cabin-mounted automotive ECUs. |
Pinout & Package
INA190A5QDCKRQ1 is housed in a 6-pin SC70 package (2.00 mm × 1.25 mm body size), optimized for space-constrained automotive PCBs. No ENABLE pin is present - this variant operates continuously when powered.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REF) | Analog reference input | Accepts external DC bias (GND to VS) to enable bidirectional current sensing; output = GAIN × (IN+ − IN−) + VREF. |
| 2 (GND) | Analog ground reference | Return path for internal circuitry; must be connected to system analog ground with low-impedance trace. |
| 3 (VS) | Power supply input | Single 1.7–5.5 V rail; powers amplifier core and output stage; bypass capacitor required at pin. |
| 4 (IN+) | Positive current-sense input | Connects to high-side bus or low-side load; tolerates –0.2 V to +40 V common-mode voltage independent of VS. |
| 5 (IN−) | Negative current-sense input | Connects to low-side ground or high-side load; differential input range limited to ±10 mV for linear operation. |
| 6 (OUT) | Analog voltage output | Rail-to-rail capable (GND +1 mV to VS –40 mV); drives 10-kΩ loads; requires no pull-up for MCU ADC interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing | Enabled via REF pin biasing - supports charge/discharge monitoring in BMS without polarity-switching hardware. |
| Ultra-low input bias current | 0.5 nA typ - eliminates voltage drop error across high-value sense resistors, enabling true µA-resolution measurement. |
| High common-mode rejection | 132 dB min - maintains accuracy despite ±100 mV ripple on 12-V battery rail, eliminating need for additional filtering. |
| Wide common-mode range | –0.2 V to +40 V - allows direct connection to battery terminals or post-ignition switch nodes without level-shifting. |
| Zero-drift architecture | 80 nV/°C max offset drift - ensures stable calibration over full automotive temperature range without periodic recalibration. |
Applications
| Body Control Module (BCM) | Telematics Control Unit |
|---|---|
Use Scenario: Monitoring standby current draw of door module ECUs to detect parasitic drain exceeding 50 µA. IC Role / Device Role / Timing Role: Current-sense amplifier measuring voltage across 1-kΩ shunt in low-side configuration, feeding 12-bit ADC of BCM microcontroller. Use Value: 0.5 nA input bias enables <1 µA measurement error, allowing detection of single-fault leakage before battery depletion. |
Use Scenario: Verifying power sequencing integrity during LTE modem wake-up in emergency call (eCall) subsystem. IC Role / Device Role / Timing Role: High-side current monitor on 3.3-V modem supply rail, capturing 10-ms current surge during RF initialization. Use Value: 27 kHz bandwidth captures transient peaks; 500 V/V gain converts 2-mV shunt drop to 1-V ADC-friendly signal. |
| Battery Management System (BMS) | Automotive Head Unit |
Use Scenario: Bidirectional current tracking for 12-V lead-acid battery during engine start-stop cycles. IC Role / Device Role / Timing Role: Shunt-based coulomb counter with REF biased at 1.65 V, output scaled to ±1.65 V for MCU differential ADC input. Use Value: ±15 µV offset ensures <0.03% full-scale error at 10-A range with 10-mΩ shunt, improving state-of-charge accuracy. |
Use Scenario: Detecting short-circuit faults in USB-C power delivery circuits within infotainment head unit. IC Role / Device Role / Timing Role: High-side monitor on 5-V USB-PD VBUS line, triggering MCU interrupt on >3-A overcurrent event. Use Value: 42-V absolute max rating withstands load-dump transients; 132 dB CMRR prevents false triggers from ignition 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 | 500 V/V gain, 80-µV max offset, 120-dB CMRR, SOT-23-8 package with ENABLE pin | Supports active power cycling; higher offset reduces µA-range resolution vs. INA190A5QDCKRQ1 | Choose for systems requiring periodic shutdown to reduce quiescent current below 100 nA. |
| MAX40056ATA+T | 500 V/V gain, ±25 µV offset, 126 dB CMRR, SC70-6 package, no ENABLE | Higher offset and lower CMRR degrade accuracy in noisy 12-V environments; wider supply range (2.7–5.5 V) | Choose only if 1.7-V operation is unnecessary and cost sensitivity outweighs precision requirements. |
Compared with INA240A5QDRQ1 and MAX40056ATA+T, the INA190A5QDCKRQ1 delivers superior µA-level resolution due to its 0.5-nA bias current and ±15-µV offset - making it optimal for low-power leakage detection and high-accuracy BMS coulomb counting where continuous operation is acceptable.
Availability
INA190A5QDCKRQ1 is available at Aetrix Electronics and suitable for body control modules, telematics units, and battery management systems requiring stable component supply across automotive production lifecycles.
Supply support for INA190A5QDCKRQ1 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 decades of automotive qualification expertise and AEC-Q100-compliant product development infrastructure.
The INA190-Q1 product line was designed specifically for high-precision, low-power current monitoring in automotive 12-V systems - targeting applications where microamp-level accuracy, wide common-mode range, and zero-drift stability are mandatory.
FAQ
What is the maximum common-mode voltage the INA190A5QDCKRQ1 can handle?
The INA190A5QDCKRQ1 supports a common-mode input range of –0.2 V to +40 V, with absolute maximum survivability up to 42 V on IN+ and IN– pins. This allows direct connection to automotive battery rails without external protection or level-shifting circuitry, even during load-dump events.
Does the INA190A5QDCKRQ1 include an ENABLE pin?
No, the INA190A5QDCKRQ1 in the SC70-6 (DCK) package does not include an ENABLE pin. That feature is exclusive to the 8-pin SOT-23 (DDF) variant. The INA190A5QDCKRQ1 operates continuously when powered within its 1.7–5.5 V supply range.
What is the bandwidth of the INA190A5QDCKRQ1 at 500 V/V gain?
The INA190A5QDCKRQ1 has a small-signal bandwidth of 27 kHz when configured with 500 V/V gain and a 10-pF capacitive load. This supports accurate monitoring of current transients in PWM-driven loads such as motor controllers and LED drivers operating below 1 kHz.
Can the INA190A5QDCKRQ1 measure bidirectional current?
Yes, the INA190A5QDCKRQ1 supports bidirectional current sensing by applying a DC bias voltage to the REF pin. With REF set to mid-supply (e.g., 1.65 V on 3.3-V rail), positive differential inputs produce outputs above REF, and negative inputs produce outputs below REF - enabling charge/discharge tracking in BMS.
What is the typical quiescent current of the INA190A5QDCKRQ1?
The INA190A5QDCKRQ1 draws 48 µA typical quiescent current at 25°C and 1.8 V supply, rising to 90 µA maximum across –40°C to +125°C. This low power consumption enables integration into always-on automotive subsystems without compromising battery life.
INA190A5QDCKRQ1 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
INA190A5QDCKRQ1 FAQ
1.How can I place an order for INA190A5QDCKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA190A5QDCKRQ1 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 INA190A5QDCKRQ1 reliable?
The price and inventory of INA190A5QDCKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA190A5QDCKRQ1 is usually 5 days.
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4.How is shipping managed for INA190A5QDCKRQ1?
INA190A5QDCKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA190A5QDCKRQ1 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 INA190A5QDCKRQ1?
For technical support, including INA190A5QDCKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA190A5QDCKRQ1 requirements.
6.How does Aetrix verify that INA190A5QDCKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA190A5QDCKRQ1 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 INA190A5QDCKRQ1 meets industry standards.
7.What is the process for return or replacement of INA190A5QDCKRQ1?
All INA190A5QDCKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA190A5QDCKRQ1, 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 INA190A5QDCKRQ1 part is unused and in its original packaging.
Return procedure for INA190A5QDCKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA190A5QDCKRQ1 Tags
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