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Texas Instruments INA190A3QDDFRQ1
- Part No.:
- INA190A3QDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA190A3QDDFRQ1.pdf
- Description:
- AEC-Q100, 40-V, BIDIRECTIONAL, U
- Quantity:
- Payment:
- Shipping:
Inventory:3,456
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Product details
Overview
INA190A3QDDFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive current-sense amplifier optimized for bidirectional microamp-precision monitoring in 12-V battery-connected systems. It delivers 100 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 path monitoring.
For engineers reviewing the INA190A3QDDFRQ1 datasheet, INA190A3QDDFRQ1 pinout, INA190A3QDDFRQ1 application, or INA190A3QDDFRQ1 equivalent, key selection criteria include its picoamp input bias current (500 pA typ), enable-controlled 100 nA shutdown current, ±0.3% max gain error, and DDF-package–specific ENABLE functionality for low-power duty-cycled sensing.
Technical Context
The INA190A3QDDFRQ1 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 full automotive temperature range.
This device supports both high-side and low-side sensing with –0.2 V to +40 V common-mode input range (survivable to 42 V), while output swing reaches within 40 mV of VS and 1 mV above GND. The ENABLE pin (DDF-only) places OUT in high-impedance state and reduces quiescent current to ≤100 nA when disabled.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 V/V - fixed ratio converting shunt voltage to amplified analog output; enables precise 10-mV/A scaling with 10-mΩ resistor. |
| Offset Voltage (VOS) | ±15 µV max - ensures <150 nA error at 10-mΩ shunt; critical for sub-mA current resolution. |
| Common-Mode Rejection (CMRR) | 132 dB min - rejects bus voltage ripple in 12-V automotive systems without calibration drift. |
| Input Bias Current (IIB) | 500 pA typical - permits use of ≥100-Ω sense resistors for µA-level current measurement accuracy. |
| Supply Voltage Range | 1.7 V to 5.5 V - supports direct connection to MCU I/O rails or low-voltage battery monitors. |
| Operating Temperature | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and body control module placement. |
| Shutdown Current | 100 nA max - enables >1-year battery life in always-on telematics wake-up circuits. |
Pinout & Package
INA190A3QDDFRQ1 is packaged in an 8-pin thin SOT-23 (DDF) with 1.60 mm × 2.90 mm body size and thermal performance rated at 164.6°C/W junction-to-ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS | Power supply input | Accepts 1.7–5.5 V; powers internal amplifiers and ENABLE logic; must be decoupled near pin. |
| ENABLE | Digital enable control | Active-high; drives device ON when tied to VS; pulls OUT to high-Z and cuts IQ to ≤100 nA when low. |
| GND | Analog ground reference | Return path for VS and signal currents; requires low-impedance PCB plane for noise immunity. |
| IN+ | Positive current-sense input | Connects to bus/high-side of shunt in high-side config; or load side in low-side config. |
| IN− | Negative current-sense input | Connects to load/low-side of shunt in high-side config; or ground side in low-side config. |
| REF | Bidirectional offset reference | External voltage sets zero-current output level; enables ± current flow detection around VREF. |
| OUT | Analog output | Voltage = VREF + 100 × (VIN+ − VIN−); rail-to-rail capable (GND+1 mV to VS−40 mV). |
| NC | No-connect | Pin 6 is unconnected internally; leave floating or tie to GND/VS per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing with REF pin | Enables single-supply monitoring of charge/discharge current in BMS by setting VREF to mid-supply. |
| 500 pA typical input bias current | Permits ≥100-Ω shunt resistors for µA-resolution measurements without significant voltage drop error. |
| 132 dB min CMRR | Maintains accuracy during 12-V battery transients (load dump, cold crank) without recalibration. |
| 100 nA max shutdown current | Supports energy harvesting and battery-backed telematics where average current must stay <1 µA. |
| Zero-drift architecture | Guarantees ±15 µV max offset and 80 nV/°C max drift - extends dynamic range below 1 mA with 10-mΩ shunt. |
Applications
| Body Control Module (BCM) | Telematics Control Unit |
|---|---|
Use Scenario: Real-time monitoring of door lock actuator and lighting circuit currents for fault detection and energy accounting. IC Role / Device Role / Timing Role: Current-sense amplifier measuring bidirectional load current on 12-V distribution rail with ±15 µV offset stability. Use Value: Detects <1 mA leakage faults before fuse blow; enables predictive maintenance via trend analysis of microamp-level standby current drift. |
Use Scenario: Low-duty-cycle current monitoring during GPS/cellular wake events to extend backup battery life. IC Role / Device Role / Timing Role: ENABLE-controlled current sensor sampling battery discharge only during active transmission bursts. Use Value: Reduces average system current by >99% vs. always-on sensing - extending 100-mAh coin-cell life from days to >18 months. |
| Emergency Call (eCall) | Battery Management System (BMS) |
Use Scenario: Verifying cranking current integrity and post-crash battery health in automated emergency notification systems. IC Role / Device Role / Timing Role: High-side shunt monitor on starter relay output with 40-V survivability and –0.2 V to +40 V common-mode range. Use Value: Accurately captures 200-A cranking pulses and detects <50 mA parasitic drain - meeting UNECE R151 functional safety requirements. |
Use Scenario: Cell-level current monitoring in 12S Li-ion packs with isolated microcontroller interface. IC Role / Device Role / Timing Role: Bidirectional amplifier using REF pin to center output at 2.5 V for ±5-A charge/discharge sensing. Use Value: Achieves ±0.3% full-scale accuracy across –40°C to +85°C - enabling Coulomb counting with <0.5% SoC error accumulation per cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A3QDRQ1 | Higher 2.5-µV max offset, 120-dB CMRR, no ENABLE pin, 8-pin SOIC package | Better offset for precision shunt calibration; lacks low-power enable mode for duty-cycled systems | Prefer INA240A3QDRQ1 when absolute offset dominates error budget and continuous monitoring is required. |
| MAX40086AUB+T | 100-V/V gain, 125-µV max offset, 100-nA shutdown, 6-pin WLP package | Smaller footprint but higher offset limits µA-range resolution; no AEC-Q100 qualification | Choose MAX40086AUB+T only for space-constrained non-automotive designs where AEC-Q100 is not mandated. |
Compared with INA240A3QDRQ1 and MAX40086AUB+T, the INA190A3QDDFRQ1 uniquely balances picoamp input bias, AEC-Q100 Grade 1 qualification, ENABLE functionality, and 132-dB CMRR - making it optimal for automotive systems requiring µA-resolution, low-duty-cycle, and high-transient immunity.
Availability
INA190A3QDDFRQ1 is available at Aetrix Electronics and suitable for battery management systems, telematics control units, and emergency call modules requiring stable component supply across automotive production lifecycles.
Supply support for INA190A3QDDFRQ1 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-grade IC design expertise and ISO/TS 16949-certified manufacturing.
The INA190-Q1 product line delivers ultra-precise, low-power current sensing for next-generation automotive electrification - targeting high-reliability applications including BMS, ADAS power domains, and vehicle-to-everything (V2X) subsystems.
FAQ
What is the maximum common-mode voltage the INA190A3QDDFRQ1 can withstand?
The INA190A3QDDFRQ1 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 allows direct connection to 12-V automotive battery rails without external protection circuitry, even during load-dump events. The specification is validated per AEC-Q100 stress testing protocols.
Does the INA190A3QDDFRQ1 support bidirectional current sensing?
Yes, the INA190A3QDDFRQ1 supports true bidirectional current sensing via its REF pin. Applying a mid-supply voltage (e.g., 2.5 V with 5-V VS) centers the output at that reference, so positive differential inputs raise OUT above VREF (indicating forward current) and negative differentials lower OUT below VREF (indicating reverse current). This is confirmed in the device's functional block diagram and Equation 1 of the datasheet.
What is the purpose of the ENABLE pin on the INA190A3QDDFRQ1?
The ENABLE pin on the INA190A3QDDFRQ1 (available only in the DDF package) controls power state: driving it high to VS activates normal operation with 65 µA typical quiescent current; pulling it low disables the amplifier, placing OUT in high-impedance state and reducing total supply current to ≤100 nA. This feature is explicitly documented in Pin Function Table 5-1 and Section 7.3.3.
What gain option does the INA190A3QDDFRQ1 provide?
INA190A3QDDFRQ1 provides a fixed gain of 100 V/V, as indicated by the "A3" suffix per TI's naming convention (A1=25 V/V, A2=50 V/V, A3=100 V/V, etc.). This gain is laser-trimmed during production and specified with ±0.3% max error over temperature - verified in Electrical Characteristics Table 6.5 and Figure 6-6.
Is the INA190A3QDDFRQ1 qualified for automotive use?
Yes, the INA190A3QDDFRQ1 is AEC-Q100 qualified for automotive applications, specifically Grade 1 (–40°C to +125°C ambient operating temperature). It also includes functional safety documentation support per ISO 26262, and all reliability test data - including HTOL, TC, and ESD - are published in the official SBOS871A datasheet revision history and qualification reports.
INA190A3QDDFRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- 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:
- 35 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:
- TSOT-23-8
INA190A3QDDFRQ1 FAQ
1.How can I place an order for INA190A3QDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA190A3QDDFRQ1 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 INA190A3QDDFRQ1 reliable?
The price and inventory of INA190A3QDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA190A3QDDFRQ1 is usually 5 days.
3.What payment methods are accepted for INA190A3QDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA190A3QDDFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA190A3QDDFRQ1?
INA190A3QDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA190A3QDDFRQ1 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 INA190A3QDDFRQ1?
For technical support, including INA190A3QDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA190A3QDDFRQ1 requirements.
6.How does Aetrix verify that INA190A3QDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All INA190A3QDDFRQ1 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 INA190A3QDDFRQ1 meets industry standards.
7.What is the process for return or replacement of INA190A3QDDFRQ1?
All INA190A3QDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA190A3QDDFRQ1, 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 INA190A3QDDFRQ1 part is unused and in its original packaging.
Return procedure for INA190A3QDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA190A3QDDFRQ1 Tags
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