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Texas Instruments INA194AIDBVRG4
- Part No.:
- INA194AIDBVRG4
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- SC-74A, SOT-753
- Datasheet:
-
INA194AIDBVRG4.pdf
- Description:
- IC CURRENT MONITOR 3% SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,472
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Product details
Overview
INA194AIDBVRG4 from Texas Instruments is a high-voltage current shunt monitor IC designed for bidirectional sensing across precision shunt resistors in industrial and automotive power systems. It delivers 50 V/V fixed gain, supports −16 V to +80 V common-mode input voltage independent of its 2.7 V to 18 V supply, achieves ≤3.0% total output error over temperature, and operates up to 300 kHz bandwidth-enabling real-time current control in battery chargers and motor drives.
For engineers reviewing the INA194AIDBVRG4 datasheet, INA194AIDBVRG4 pinout, INA194AIDBVRG4 application, or INA194AIDBVRG4 equivalent, key selection criteria include its SOT-23-5 package compatibility, 50 V/V transfer function accuracy under wide common-mode transients, low 900 μA quiescent current for always-on monitoring, and validated performance at −40°C to +125°C for under-hood and industrial environments.
Technical Context
The INA194AIDBVRG4 implements a patented dual-amplifier front-end architecture: amplifier A1 activates for negative common-mode voltages (−16 V to 0 V), while A2 handles positive ranges (0 V to +80 V), ensuring seamless transition and stable operation across bipolar supply rails. Its internal current-to-voltage conversion eliminates reliance on precision resistor matching for common-mode rejection.
This topology enables 94 dB typical CMR at DC and >100 dB over temperature, with RTI offset voltage ≤3 mV and dVOS/dT ≤2.5 μV/°C-critical for maintaining accuracy in high-noise 48 V telecom or EV battery management systems where shunt voltage drops range from 20 mV to 100 mV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V fixed transfer function-converts 20–100 mV shunt voltage to 1–5 V output for direct ADC interfacing without external scaling. |
| Common-Mode Range | −16 V to +80 V-supports current sensing on high-side, low-side, or floating rails in 12 V, 24 V, 48 V, and 60 V systems without level-shifting. |
| Total Output Error | ≤3.0% over −40°C to +125°C-guarantees measurement fidelity in engine control units and welding inverters exposed to thermal cycling. |
| Bandwidth | 300 kHz-enables closed-loop current regulation in fast-switching SMPS and servo motor drivers with <2 μs settling time. |
| Supply Voltage | 2.7 V to 18 V-operates from single Li-ion battery (3.3 V), 5 V logic rails, or 12 V automotive systems without auxiliary regulators. |
| Quiescent Current | ≤900 μA-minimizes standby power loss in battery-powered equipment such as portable test gear and IoT edge nodes. |
| Package | SOT-23-5 (2.90 mm × 1.60 mm)-fits high-density PCB layouts in space-constrained applications like notebook power delivery and telecom line cards. |
Pinout & Package
SOT-23-5 surface-mount package with 2.90 mm × 1.60 mm body size and standard lead pitch; optimized for automated placement and reflow soldering in high-volume manufacturing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Analog output | Voltage output scaled by 50× shunt differential voltage; drives 100 kΩ loads with ≤1.5 Ω impedance and 300 mV headroom to GND. |
| 2 (GND) | Ground reference | System ground return path; must be connected directly to low-impedance PCB ground plane to maintain CMR and noise immunity. |
| 3 (VIN+) | Positive shunt terminal | Connects to supply-side of shunt resistor; withstands −16 V to +80 V common-mode voltage regardless of V+ supply level. |
| 4 (VIN−) | Negative shunt terminal | Connects to load-side of shunt resistor; forms differential input pair with VIN+; input bias current ±16 μA max affects low-current accuracy. |
| 5 (V+) | Analog power supply | 2.7 V to 18 V single supply input; bypass capacitor required at pin for stability; powers internal amplifiers and output buffer. |
Key Features
| Feature | Design Value |
|---|---|
| Wide common-mode sensing | Operates from −16 V to +80 V common-mode voltage independent of V+, enabling shunt placement on any node in multi-rail systems. |
| High CMR architecture | Dual-op-amp topology achieves ≥94 dB CMR without matched external resistors-reducing layout sensitivity and calibration burden. |
| Low-error output | ≤3.0% total output error over full temperature range ensures reliable current feedback in safety-critical overcurrent protection circuits. |
| Fast response | 300 kHz bandwidth and 2 μs 1% settling time support dynamic current control in PWM-driven loads like solenoids and BLDC motors. |
| Low-power operation | 900 μA max quiescent current allows continuous monitoring in energy-sensitive applications such as battery fuel gauging and UPS supervision. |
Applications
| Automotive Battery Management | Industrial Motor Drives |
|---|---|
Use Scenario: Monitoring charge/discharge current in 12 V/48 V hybrid vehicle battery packs during regenerative braking and start-stop cycles. IC Role / Device Role / Timing Role: High-side current shunt monitor providing isolated analog output to MCU ADC for real-time state-of-charge calculation and fault detection. Use Value: −16 V to +80 V common-mode range accommodates battery voltage transients during load dump; 300 kHz bandwidth captures rapid current spikes without aliasing. |
Use Scenario: Closed-loop phase current sensing in 3-phase inverter stages driving HVAC compressors and conveyor belt motors. IC Role / Device Role / Timing Role: Low-latency current feedback element in current control loop, interfacing directly with isolation amplifier inputs or sigma-delta ADCs. Use Value: 50 V/V gain maps 40 mV shunt drop to 2 V output-optimizing ADC full-scale utilization while maintaining <3% error across −40°C to +125°C ambient. |
| Telecom Power Supply | Welding Equipment |
Use Scenario: Input/output current monitoring in 48 V distributed power architecture (DPA) modules for base station RF amplifiers and optical line terminals. IC Role / Device Role / Timing Role: Bidirectional current sense amplifier feeding digital power manager for load balancing and hot-swap sequencing. Use Value: SOT-23-5 footprint minimizes board area in dense telecom rectifier designs; 900 μA IQ enables always-on telemetry without compromising efficiency. |
Use Scenario: Real-time arc current measurement in IGBT-based inverter welders operating at 60–100 V DC bus with high di/dt transients. IC Role / Device Role / Timing Role: High-bandwidth current monitor placed across low-inductance shunt in primary side, delivering fast feedback to PWM controller. Use Value: 300 kHz bandwidth resolves sub-millisecond current surges during arc ignition; ±16 V to +80 V range covers both open-circuit and short-circuit weld conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current shunt monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA194AIDBVT | Same 50 V/V gain, SOT-23-5 package, and electrical specs-but offered in tape-and-reel (DBVT) vs cut-tape (DBVRG4); identical pinout and performance. | No functional difference; selected when volume procurement requires reel packaging for SMT line efficiency. | Direct form-fit-function replacement; no design or layout changes required. |
| MAX4080TASA+ | 50 V/V gain, but narrower −5 V to +65 V common-mode range and higher 1.2 mA IQ; uses SOIC-8 package instead of SOT-23-5. | Less suitable for automotive load-dump or negative-rail industrial systems; larger footprint limits high-density use. | Consider only if SOIC-8 is preferred for hand-soldering or thermal dissipation needs exceed SOT-23 limits. |
Compared with INA194AIDBVRG4, the INA194AIDBVT offers identical electrical behavior with optimized packaging for automated assembly, while the MAX4080TASA+ trades common-mode range and power efficiency for SOIC-8 thermal robustness-making the INA194AIDBVRG4 optimal for space-constrained, wide-voltage, low-power current sensing.
Availability
INA194AIDBVRG4 is available at Aetrix Electronics and suitable for automotive battery management, industrial motor drives, telecom power supplies, and welding equipment requiring stable component supply across extended temperature and voltage ranges.
Supply support for INA194AIDBVRG4 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 expertise in precision signal conditioning and power management ICs.
The INA19x family was engineered specifically for high-accuracy, high-common-mode current sensing in harsh environments-targeting automotive, industrial, and telecom applications where reliability across extreme voltage and temperature is non-negotiable.
FAQ
What is the maximum common-mode voltage the INA194AIDBVRG4 can handle?
The INA194AIDBVRG4 supports a guaranteed common-mode input voltage range of −16 V to +80 V, independent of its 2.7 V to 18 V supply voltage. This allows accurate current sensing on high-side, low-side, or floating shunts in 48 V battery systems, industrial 60 V rails, and automotive load-dump scenarios-all without external level-shifting circuitry. The specification is validated per TI's SBOS307G datasheet Section 7.3.
Does the INA194AIDBVRG4 require external components for basic operation?
Yes-the INA194AIDBVRG4 requires a minimum 0.1 μF ceramic bypass capacitor between V+ and GND, placed as close as possible to the pins, to ensure stability and noise immunity. No external gain-setting resistors are needed since it features a factory-trimmed 50 V/V fixed gain. Input filtering is optional and must account for the device's internal 5 kΩ ±30% input impedance if used.
Can the INA194AIDBVRG4 measure bidirectional current flow?
Yes-the INA194AIDBVRG4 measures the differential voltage across a shunt resistor (VIN+ − VIN−) and outputs a unidirectional voltage proportional to current magnitude and direction. When the shunt voltage polarity reverses, the output voltage crosses zero accordingly. Its symmetric common-mode range (−16 V to +80 V) and rail-to-rail output swing enable true bidirectional sensing in applications like regenerative braking and H-bridge motor control.
What is the operating temperature range for the INA194AIDBVRG4?
The INA194AIDBVRG4 is specified for continuous operation from −40°C to +125°C ambient temperature, with full electrical performance guaranteed across this extended industrial range. Absolute maximum ratings extend to −55°C to +150°C junction temperature, supporting deployment in under-hood automotive ECUs, industrial PLCs, and outdoor telecom equipment without derating.
How does the INA194AIDBVRG4 differ from the INA194AIDBVT?
The INA194AIDBVRG4 and INA194AIDBVT share identical electrical specifications, pinout, package (SOT-23-5), and performance-differing only in packaging format: DBVRG4 is supplied in cut-tape (reel-less), while DBVT is in standard 3,000-unit tape-and-reel. Both are manufactured by Texas Instruments and fully interchangeable in circuit design; the choice depends solely on assembly line requirements and order quantity.
INA194AIDBVRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
INA194AIDBVRG4 FAQ
1.How can I place an order for INA194AIDBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA194AIDBVRG4 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 INA194AIDBVRG4 reliable?
The price and inventory of INA194AIDBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA194AIDBVRG4 is usually 5 days.
3.What payment methods are accepted for INA194AIDBVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA194AIDBVRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA194AIDBVRG4?
INA194AIDBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA194AIDBVRG4 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 INA194AIDBVRG4?
For technical support, including INA194AIDBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA194AIDBVRG4 requirements.
6.How does Aetrix verify that INA194AIDBVRG4 is sourced from the original manufacturer or authorized distributors?
All INA194AIDBVRG4 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 INA194AIDBVRG4 meets industry standards.
7.What is the process for return or replacement of INA194AIDBVRG4?
All INA194AIDBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with INA194AIDBVRG4, 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 INA194AIDBVRG4 part is unused and in its original packaging.
Return procedure for INA194AIDBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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