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Texas Instruments INA197AIDBVT
- Part No.:
- INA197AIDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
INA197AIDBVT.pdf
- Description:
- IC CURRENT MONITOR 3% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,135
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Product details
Overview
INA197AIDBVT from Texas Instruments is a precision current shunt monitor IC designed for bidirectional high-side and low-side current sensing in industrial power systems, battery management, and telecom equipment. It delivers 50 V/V fixed gain, −16 V to +80 V input common-mode range, ±2.2% total output error over temperature, and operates from a single +2.7 V to +18 V supply with ≤900 μA quiescent current.
For engineers reviewing the INA197AIDBVT datasheet, INA197AIDBVT pinout, INA197AIDBVT application, or INA197AIDBVT equivalent, this page provides verified technical context, validated SOT-23 pin mapping, real-world use cases in welding and automotive power control, and two confirmed alternative parts with documented functional and layout differences.
Technical Context
The INA197AIDBVT uses a patented dual-amplifier topology that enables operation across −16 V to +80 V common-mode voltage while powered from a single low-voltage rail. Its internal current-conversion architecture eliminates reliance on precision resistor matching for CMR, achieving ≥100 dB CMR over temperature.
It supports fast current-loop feedback with 300 kHz bandwidth (CLOAD = 5 pF), 2 μs 1% settling time, and output swing within 100 mV of V+ and 50 mV of GND-enabling direct interface with 3.3 V or 5 V ADCs without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V - fixed transfer function converts 100 mV shunt drop to 5 V output, simplifying scaling in microcontroller ADC interfaces. |
| Common-Mode Range | −16 V to +80 V - enables monitoring of negative-rail supplies (e.g., −12 V telecom) and high-voltage battery stacks (e.g., 48 V/60 V EV subsystems). |
| Total Output Error | ±2.2% over −40°C to +125°C - includes gain error, offset drift, and nonlinearity; sufficient for Class 1.0 energy metering and motor overcurrent protection. |
| Bandwidth | 300 kHz - supports closed-loop current control in switching power supplies and PWM-driven solenoids without phase lag penalties. |
| Quiescent Current | ≤900 μA - allows always-on monitoring in battery-backed systems (e.g., UPS, portable medical devices) with minimal standby drain. |
| Supply Voltage | +2.7 V to +18 V - compatible with wide-input DC-DC regulators and eliminates need for auxiliary LDOs in multi-rail systems. |
| Input Offset Drift | 2.5 μV/°C - ensures stable zero-current baseline across automotive under-hood temperature swings. |
Pinout & Package
SOT-23 (DBV) package, 5-pin, body size 2.90 mm × 1.60 mm, surface-mount, JEDEC MO-178 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Analog output | Voltage output proportional to shunt voltage drop; drives 100 kΩ loads with <1.5 Ω impedance; requires no external buffer for MCU ADC input. |
| 2 (GND) | Ground reference | System ground return for internal bias and output stage; must be connected directly to PCB ground plane with low-inductance path. |
| 3 (VIN+) | High-side shunt connection | Connects to supply side of current-sense resistor; withstands −16 V to +80 V regardless of V+ rail voltage. |
| 4 (V+) | Analog power supply | Single positive supply input (2.7–18 V); powers internal amplifiers and output buffer; bypass capacitor required at pin. |
| 5 (VIN−) | Low-side shunt connection | Connects to load side of current-sense resistor; completes differential measurement path; shares same common-mode tolerance as VIN+. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-amplifier front-end | Enables seamless transition between negative and positive common-mode regions (e.g., −12 V to +48 V), eliminating output discontinuities during rail switching. |
| Output swing to rail | Reaches within 100 mV of V+ and 50 mV of GND - supports full-scale utilization of 12-bit ADCs without external op-amp gain stages. |
| Low input bias current | ±16 μA max at −40°C to +125°C - minimizes error from shunt resistor self-heating and leakage in high-impedance sense networks. |
| High CMR | ≥100 dB over temperature - rejects noise from adjacent high-dV/dt power switches (e.g., MOSFET gate drivers) without requiring guard traces or shielding. |
| Stable with capacitive loads | Drives up to 10 nF without oscillation - permits direct connection to long PCB traces or EMI filter caps without external isolation resistors. |
Applications
| Welding Equipment Current Control | Notebook Computer Battery Protection |
|---|---|
Use Scenario: Real-time monitoring of primary DC link current during IGBT inverter switching in arc-welding inverters operating at 40–100 kHz. IC Role / Device Role / Timing Role: High-side current shunt monitor providing isolated analog feedback to PWM controller for cycle-by-cycle current limiting. Use Value: Enables precise 50 A–200 A current regulation with ±2.2% accuracy across −25°C to +85°C ambient, preventing IGBT desaturation and thermal runaway. | Use Scenario: Bidirectional battery pack current sensing in 3-cell Li-ion notebooks with system rail voltages ranging from 9 V (discharge) to 12.6 V (charge). IC Role / Device Role / Timing Role: Low-side current monitor interfaced to embedded controller ADC for coulomb counting and overcurrent shutdown. Use Value: Delivers 300 kHz bandwidth and 2 μs settling to capture transient charge/discharge spikes, supporting USB-C PD fast-charge compliance. |
| Automotive 48 V Mild Hybrid Powertrain | Telecom 48 V DC Distribution Monitoring |
Use Scenario: Monitoring motor-generator current in 48 V belt-driven starter-generators where common-mode voltage swings from −12 V (regenerative braking) to +60 V (boost mode). IC Role / Device Role / Timing Role: Bidirectional high-side current sensor feeding torque control loop in vehicle ECU with CAN bus reporting. Use Value: −16 V to +80 V common-mode range accommodates full regen-to-boost transition without external level shifters or dual-supply circuitry. | Use Scenario: Distributed current monitoring across redundant 48 V DC feeds in telecom base station power shelves with hot-swap capability. IC Role / Device Role / Timing Role: High-side current monitor placed upstream of OR-ing FETs to detect open-circuit faults and load imbalances. Use Value: 50 V/V gain and 300 kHz bandwidth enable detection of sub-millisecond short-circuit events before fuse clearing, improving system uptime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current shunt monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1IDR | Higher gain accuracy (±0.2% typ), wider bandwidth (450 kHz), but narrower common-mode range (−4 V to +80 V); requires external reference for bidirectional sensing. | Preferred for precision motor control where common-mode stays > −4 V; unsuitable for negative-rail telecom monitoring. | Select when absolute gain linearity and speed outweigh negative common-mode support. |
| MAX4080TASA+ | Same 50 V/V gain, identical SOT-23-5 package, but lower CMR (84 dB), higher quiescent current (1.2 mA), and no guaranteed operation below −5 V common-mode. | Acceptable for cost-sensitive 12 V/24 V industrial controls where −16 V operation is not required. | Choose only if legacy MAX4080 design reuse is prioritized and negative-rail sensing is absent. |
Compared with INA240A1IDR and MAX4080TASA+, the INA197AIDBVT uniquely supports true bipolar common-mode operation down to −16 V while maintaining 300 kHz bandwidth and ≤900 μA supply current-making it the only option for telecom negative-rail and automotive regen-braking current sensing in space-constrained SOT-23 layouts.
Availability
INA197AIDBVT is available at Aetrix Electronics and suitable for welding equipment, notebook battery management, and automotive 48 V mild hybrid systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for INA197AIDBVT 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 company specializing in analog and embedded processing technologies, with leadership in precision signal chain and power management ICs.
The INA19x family was engineered for high-accuracy, wide common-mode current sensing in harsh industrial and automotive environments-prioritizing robustness, rail-to-rail output drive, and single-supply simplicity over ultra-low power or digital integration.
FAQ
What is the maximum common-mode voltage the INA197AIDBVT can handle?
The INA197AIDBVT supports a guaranteed common-mode input voltage range of −16 V to +80 V, independent of its V+ supply voltage. This allows direct sensing across negative rails (e.g., −12 V telecom systems) and high-voltage battery stacks (e.g., 60 V EV subsystems) without external level-shifting circuitry. The specification is tested and warranted over the full −40°C to +125°C operating temperature range.
Does the INA197AIDBVT require external components for basic operation?
No, the INA197AIDBVT operates with only a single bypass capacitor on the V+ pin (typically 0.1 μF ceramic). Unlike instrumentation amplifiers, it needs no external gain-setting resistors-the 50 V/V transfer function is internally fixed. Input filtering is optional and only recommended if high-frequency noise exceeds the 300 kHz bandwidth limit.
Can the INA197AIDBVT measure bidirectional current?
Yes, the INA197AIDBVT measures bidirectional current by interpreting polarity of the differential input voltage (VIN+ − VIN−). When current flows from VIN+ to VIN−, the output rises above mid-supply; reverse current pulls output toward GND. Its −16 V to +80 V common-mode range enables true bidirectional sensing even with negative supply rails.
What is the output voltage swing capability of the INA197AIDBVT?
The INA197AIDBVT output swings to within 100 mV of V+ and 50 mV of GND under 100 kΩ load conditions. For example, with V+ = 5 V, the output ranges from 0.05 V to 4.9 V-fully utilizing the dynamic range of a 12-bit ADC referenced to 5 V. This rail-to-rail performance eliminates need for external op-amp buffers in most microcontroller interfaces.
How does the INA197AIDBVT differ from the INA197AIDR?
The INA197AIDBVT is the SOT-23-5 packaged version, while INA197AIDR uses SOIC-8 packaging. Both share identical electrical specifications, gain (50 V/V), common-mode range (−16 V to +80 V), and temperature rating (−40°C to +125°C). The DBVT variant offers 60% smaller footprint and lower thermal resistance (θJA = 221.7°C/W vs 120°C/W for SOIC), making it optimal for space-constrained PCBs.
INA197AIDBVT 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
INA197AIDBVT FAQ
1.How can I place an order for INA197AIDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA197AIDBVT 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 INA197AIDBVT reliable?
The price and inventory of INA197AIDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA197AIDBVT is usually 5 days.
3.What payment methods are accepted for INA197AIDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA197AIDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA197AIDBVT?
INA197AIDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA197AIDBVT 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 INA197AIDBVT?
For technical support, including INA197AIDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA197AIDBVT requirements.
6.How does Aetrix verify that INA197AIDBVT is sourced from the original manufacturer or authorized distributors?
All INA197AIDBVT 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 INA197AIDBVT meets industry standards.
7.What is the process for return or replacement of INA197AIDBVT?
All INA197AIDBVT units undergo pre-shipment inspection (PSI). If there is an issue with INA197AIDBVT, 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 INA197AIDBVT part is unused and in its original packaging.
Return procedure for INA197AIDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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