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Texas Instruments INA197AQDBVRQ1
- Part No.:
- INA197AQDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
INA197AQDBVRQ1.pdf
- Description:
- IC CURRENT MONITOR 3% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,205
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Product details
Overview
INA197AQDBVRQ1 from Texas Instruments is an automotive-grade current shunt monitor IC with voltage output, designed for high-side or low-side sensing across shunt resistors in systems with common-mode voltages from –16 V to +80 V. It delivers 50 V/V gain, ±2% total output error over temperature, 500-kHz bandwidth, and operates from a single 2.7-V to 18-V supply. It is used in HEV/EV powertrain current monitoring where wide common-mode range and functional safety support are required.
For engineers reviewing the INA197AQDBVRQ1 datasheet, INA197AQDBVRQ1 pinout, INA197AQDBVRQ1 application, or INA197AQDBVRQ1 equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and confirmed alternative parts for automotive current-sensing designs requiring AEC-Q100 qualification and functional safety documentation.
Technical Context
The INA197AQDBVRQ1 implements a patented dual-amplifier front-end architecture that enables –16 V to +80 V common-mode operation independent of its 2.7–18 V supply voltage. Its 50 V/V fixed gain is achieved via internal 5-kΩ input impedance and precision output buffer, supporting accurate sensing even when VIN+ exceeds V+ (e.g., 80 V load with 5 V supply).
It features 80–120 dB common-mode rejection (CMR), 40 nV/√Hz input-referred voltage noise, and 2 μs settling time (1%) for dynamic current control loops. The device draws 370–950 μA quiescent current and is specified across –40°C to +125°C for automotive body control modules and battery management systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V - fixed transfer function; outputs 50 mV per 1 mV shunt voltage, enabling direct ADC interfacing without external scaling. |
| Common-Mode Range | –16 V to +80 V - supports bidirectional sensing in 12 V/48 V/80 V automotive systems, including negative rail monitoring and regenerative braking. |
| Total Output Error | ±3% max over –40°C to +125°C - includes gain error and offset drift; ensures reliable fault detection in safety-critical HEV/EV powertrain monitoring. |
| Bandwidth | 300 kHz - sufficient for closed-loop motor current control and fast transient response in DC motor health diagnostics. |
| Supply Voltage | 2.7 V to 18 V - compatible with standard automotive 5 V or 12 V rails; allows operation during cold-crank (down to 2.7 V). |
| Quiescent Current | 370–950 μA - ultra-low power enables always-on current monitoring in battery-powered modules without significant drain. |
| ESD Rating | ±4 kV HBM - meets AEC-Q100-002 for robustness in manufacturing and vehicle environments. |
Pinout & Package
SOT-23 (DBV) 5-pin package, 2.90 mm × 1.60 mm body size, surface-mount, thermally enhanced for automotive under-hood use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT | Analog output | Voltage output proportional to shunt voltage (VOUT = 50 × (VIN+ − VIN−)); drives 100 kΩ loads with <1.5 Ω impedance. |
| 2: GND | Ground reference | System ground return for internal circuitry and output stage; must be connected to low-impedance PCB ground plane. |
| 3: V+ | Power supply | Single analog supply input (2.7–18 V); powers all internal amplifiers and output buffer; requires local 0.1 μF ceramic decoupling. |
| 4: VIN− | Differential input (−) | Connects to load side of shunt resistor; senses current direction in high-side configurations; tolerates –16 V to +80 V common-mode. |
| 5: VIN+ | Differential input (+) | Connects to supply side of shunt resistor; enables bidirectional sensing; shares same common-mode tolerance as VIN−. |
Key Features
| Feature | Design Value |
|---|---|
| Functional safety-capable | Documentation available (ISO 26262 ASIL-B support) for system-level FMEDA and safety analysis in automotive ECUs. |
| Wide common-mode operation | Operates with VIN+ or VIN− at –16 V (e.g., battery ground fault) or +80 V (e.g., 48 V mild-hybrid bus), independent of V+. |
| High CMR at full bandwidth | 100–120 dB CMR maintained up to 100 kHz - rejects noise from high-power switching nodes in inverters and DC-DC converters. |
| Low quiescent current | Max 950 μA at 125°C - enables continuous current monitoring in always-on vehicle domains (e.g., battery disconnect units). |
| Robust input protection | Withstands ±18 V differential input and ±5 mA input current - survives load dump, jump-start, and reverse-battery transients. |
Applications
| HEV/EV Powertrain | Body Control Module (BCM) |
|---|---|
Use Scenario: Monitoring motor phase current in traction inverter gate drivers during regenerative braking and torque control. IC Role / Device Role / Timing Role: High-side current shunt monitor providing isolated, wide common-mode feedback to MCU ADC for real-time current loop closure. Use Value: Enables precise 300 kHz current sampling without external isolation, reducing BOM cost versus optocoupled solutions while meeting ASIL-B diagnostic coverage. |
Use Scenario: Detecting abnormal current draw in door module actuators (window lift, mirror adjust) to prevent motor stall or wiring faults. IC Role / Device Role / Timing Role: Low-side shunt monitor feeding diagnostic logic in 16-bit automotive MCU for fault classification (short, open, overload). Use Value: ±3% error over temperature ensures reliable threshold-based fault detection across –40°C to +125°C ambient, eliminating false alarms. |
| Welding Equipment | Battery Charger Systems |
Use Scenario: Measuring high-current DC output (up to 200 A) in industrial inverter-based welding power supplies with floating ground references. IC Role / Device Role / Timing Role: High-side current sensor interfaced to isolated sigma-delta ADC, operating at 80 V common-mode with 500 kHz bandwidth for arc stability control. Use Value: 300 kHz usable bandwidth and 80 dB CMR suppress EMI from IGBT switching, improving weld consistency and arc restart reliability. |
Use Scenario: Monitoring charge/discharge current in 48 V Li-ion battery packs for data center UPS and telecom backup systems. IC Role / Device Role / Timing Role: Bidirectional shunt monitor on battery pack main bus, detecting overcurrent, cell imbalance, and thermal runaway precursors. Use Value: –16 V to +80 V range covers full pack voltage swing during deep discharge and boost charging; 50 V/V gain optimizes 12-bit ADC resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDR | 4 V/V gain, 80 V common-mode, 10x lower offset drift (0.5 μV/°C), but only 105 kHz bandwidth. | Better for precision DC measurements (e.g., battery SOC), less suitable for fast motor control loops. | Select for high-accuracy, low-bandwidth applications where gain scaling is handled externally. |
| MAX40056ATA+T | 50 V/V gain, 65 V common-mode, 400 kHz bandwidth, integrated overvoltage protection clamp. | Supports higher-speed control than INA197AQDBVRQ1 in 48 V systems but lacks AEC-Q100 qualification. | Choose for industrial 48 V chargers needing faster response and built-in fault clamping, not for automotive safety-critical use. |
Compared with INA240A1QDR and MAX40056ATA+T, the INA197AQDBVRQ1 uniquely balances 300 kHz bandwidth, AEC-Q100 qualification, functional safety documentation, and –16 V capability-making it the only option qualified for automotive high-side current monitoring where negative-rail fault detection is required.
Availability
INA197AQDBVRQ1 is available at Aetrix Electronics and suitable for HEV/EV powertrain, body control modules, and battery charger systems requiring stable component supply, long-term automotive lifecycle support, and traceable AEC-Q100-compliant sourcing.
Supply support for INA197AQDBVRQ1 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 IC design expertise and ISO/TS 16949-certified manufacturing.
The INA19xA-Q1 product line was developed specifically for automotive current sensing in harsh environments, targeting ASIL-B functional safety compliance, extended temperature operation, and robust EMC performance in powertrain and chassis systems.
FAQ
What is the common-mode voltage range supported by the INA197AQDBVRQ1?
The INA197AQDBVRQ1 supports a common-mode voltage range of –16 V to +80 V, independent of its 2.7–18 V supply voltage. This allows it to monitor current in high-side configurations where VIN+ may sit at 80 V (e.g., 48 V mild-hybrid bus) while V+ remains at 5 V. The specification is fully characterized and guaranteed across –40°C to +125°C for automotive use.
Does the INA197AQDBVRQ1 require external gain-setting resistors?
No, the INA197AQDBVRQ1 has a factory-trimmed fixed gain of 50 V/V. It does not require external resistors to set gain, simplifying layout and eliminating resistor tolerance errors. The gain accuracy is ±2% over temperature, and the internal 5-kΩ input impedance is optimized for direct shunt connection without signal conditioning.
How does the INA197AQDBVRQ1 handle negative common-mode voltages?
The INA197AQDBVRQ1 uses a dual-amplifier topology where amplifier A1 activates for negative common-mode conditions (–16 V ≤ VCM < 0). This enables accurate sensing down to –16 V, critical for detecting battery ground faults or reverse-polarity events in automotive systems. Output behavior is characterized and specified in the "Low VSENSE Case 1" region of the datasheet.
Is the INA197AQDBVRQ1 pin-compatible with other devices in the INA19xA-Q1 family?
Yes, the INA197AQDBVRQ1 shares the same DBV (SOT-23) 5-pin pinout as INA196A-Q1 and INA198A-Q1 (Figure 5-2), with pins: 1=OUT, 2=GND, 3=V+, 4=VIN−, 5=VIN+. It is not pin-compatible with INA193A–INA195A-Q1, which use a different pin mapping (e.g., V+ on pin 5). Always verify pin configuration before board reuse.
What functional safety documentation is available for the INA197AQDBVRQ1?
Texas Instruments provides functional safety documentation for the INA197AQDBVRQ1, including FMEDA reports, safety manuals, and diagnostic coverage analysis aligned with ISO 26262 ASIL-B requirements. These documents aid system-level safety architects in qualifying the device for automotive applications such as battery management and motor control ECUs.
INA197AQDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Monitor
- Sensing Method:
- High-Side
- Accuracy:
- ±3%
- Voltage - Input:
- -16V ~ 80V
- Current - Output:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
INA197AQDBVRQ1 FAQ
1.How can I place an order for INA197AQDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA197AQDBVRQ1 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 INA197AQDBVRQ1 reliable?
The price and inventory of INA197AQDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA197AQDBVRQ1 is usually 5 days.
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4.How is shipping managed for INA197AQDBVRQ1?
INA197AQDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA197AQDBVRQ1 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 INA197AQDBVRQ1?
For technical support, including INA197AQDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA197AQDBVRQ1 requirements.
6.How does Aetrix verify that INA197AQDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All INA197AQDBVRQ1 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 INA197AQDBVRQ1 meets industry standards.
7.What is the process for return or replacement of INA197AQDBVRQ1?
All INA197AQDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA197AQDBVRQ1, 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 INA197AQDBVRQ1 part is unused and in its original packaging.
Return procedure for INA197AQDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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