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Texas Instruments INA190A4IDDFR
- Part No.:
- INA190A4IDDFR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA190A4IDDFR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,073
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Product details
Overview
INA190A4IDDFR from Texas Instruments is a bidirectional, zero-drift, precision current-sense amplifier with 200 V/V fixed gain, ±15 µV max offset voltage, 132 dB min CMRR, and –0.2 V to +40 V wide common-mode input range. It operates from 1.7 V to 5.5 V supply, draws 65 µA quiescent current, and supports high-side/low-side sensing in battery-powered portable electronics.
For engineers reviewing the INA190A4IDDFR datasheet, INA190A4IDDFR pinout, INA190A4IDDFR application, or INA190A4IDDFR equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for microamp-accurate current monitoring in space-constrained, low-power systems.
Technical Context
The INA190A4IDDFR uses a capacitively coupled front-end architecture to achieve ultra-low input bias current (0.5 nA typ) and high common-mode rejection (132 dB min), enabling accurate microamp-level current measurement without degrading signal integrity via input filtering. Its zero-drift design maintains ±15 µV max offset and 80 nV/°C max drift across –40°C to +125°C.
This device implements bidirectional sensing via external REF pin biasing, supports rail-to-rail output swing (GND + 1 mV / VS – 40 mV), and integrates an ENABLE pin (pin 2 in DDF package) that reduces supply current to 100 nA max while placing OUT in high-impedance state - critical for duty-cycled power monitoring in portable devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 200 V/V - sets full-scale output for 10-mV sense voltage at 2 V output; enables precise low-current detection with minimal RSENSE power loss. |
| Offset Voltage (max) | ±15 µV - ensures <1% error down to ~75 µA load current with 100-mΩ shunt; extends dynamic range for microamp measurements. |
| Common-Mode Range | –0.2 V to +40 V - supports direct high-side sensing on 36-V bus rails independent of 1.7–5.5 V supply; eliminates level-shifting circuitry. |
| Input Bias Current (typ) | 0.5 nA - permits use of high-value shunts (e.g., 10 kΩ) for nanoamp current monitoring without significant error contribution. |
| Quiescent Current (typ) | 65 µA - enables continuous monitoring in always-on subsystems powered by coin cells or energy-harvesting sources. |
| Shutdown Current (max) | 100 nA - reduces system standby power by >99.8% when ENABLE pin is grounded; essential for battery longevity in IoT endpoints. |
| Bandwidth | 33 kHz - supports fast transient response (30 µs settling) for overcurrent protection in DC-DC converters and motor drivers. |
Pinout & Package
SOT-23-8 (DDF) package: 1.60 mm × 2.90 mm body, 0.65 mm pitch, surface-mount, thermally enhanced with exposed pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No internal connection; must be left floating or tied to GND/VS per layout best practices - no functional impact. |
| 2 | ENABLE | Digital enable control: driven to VS for active operation; pulled to GND to disable amplifier and reduce IQ to ≤100 nA. |
| 3 | REF | Bidirectional reference input: sets output midpoint (e.g., VS/2) to allow positive/negative current indication relative to VREF. |
| 4 | GND | Analog ground reference: low-impedance return path for IN±, REF, and OUT; requires dedicated ground plane under package. |
| 5 | OUT | Voltage-output node: provides 200×(VIN+ – VIN−) + VREF; rail-to-rail capable (GND + 1 mV / VS – 40 mV). |
| 6 | VS | Power supply input: accepts 1.7–5.5 V; bypass with 0.1 µF ceramic capacitor placed within 2 mm of pin. |
| 7 | IN+ | Positive current-sense input: connects to bus side in high-side config; load side in low-side config. |
| 8 | IN− | Negative current-sense input: connects to load side in high-side config; ground side in low-side config. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | Maintains ±15 µV max offset and 80 nV/°C max drift over –40°C to +125°C - enables stable microamp measurement without recalibration. |
| Capacitively coupled input stage | Blocks DC common-mode voltage while preserving signal integrity - achieves 132 dB min CMRR and enables noise-filtering RC networks without accuracy penalty. |
| Enable-controlled shutdown | Reduces total supply current to ≤100 nA and places OUT in high-Z state - eliminates need for external analog switches in periodic-sampling applications. |
| Bidirectional sensing support | REF pin allows user-defined output center point (e.g., 1.25 V on 2.5-V supply) - enables single-supply detection of charge/discharge current in battery management. |
| Rail-to-rail output stage | Delivers usable output swing from GND + 1 mV to VS – 40 mV - maximizes ADC resolution when interfacing with 1.8-V microcontrollers. |
Applications
| Smartphone Battery Management | USB-C Power Delivery Monitor |
|---|---|
|
Use Scenario: Real-time charging/discharging current tracking in compact smartphone PCBs with tight thermal and space constraints. IC Role / Device Role / Timing Role: Precision current-sense amplifier measuring µA–A range across 10-mΩ shunt; interfaces directly to 12-bit SAR ADC in application processor. Use Value: Enables coulomb counting with <1% full-scale error across temperature, extending battery runtime estimation accuracy by >15% versus legacy amplifiers. |
Use Scenario: Bidirectional current monitoring in USB-C PD sink ports to enforce power contract compliance and detect fault conditions. IC Role / Device Role / Timing Role: High-side sense amplifier on 20-V VBUS line; REF biased to 1.65 V for ±500 mA full-scale; responds to overcurrent in <30 µs. Use Value: Supports USB PD 3.1 EPR mode with 50 V tolerance margin and eliminates need for isolated amplifiers or digital isolators in PD controller feedback loop. |
| Industrial IoT Sensor Node | Merchant Server PSU Telemetry |
|
Use Scenario: Ultra-low-power current monitoring in battery-operated wireless sensor nodes deployed in remote locations for 10+ year lifetime. IC Role / Device Role / Timing Role: Enabled only during scheduled 100-ms measurement windows; draws 100 nA in shutdown between readings. Use Value: Reduces average system current to <1 µA per reading cycle - extends CR2032 battery life from 2 to >12 years at 1-minute sampling interval. |
Use Scenario: Accurate load current telemetry in 1U server PSUs where space is constrained and thermal headroom is limited near 12-V output rails. IC Role / Device Role / Timing Role: Low-side current monitor on 12-V output with 2-mΩ shunt; 200 V/V gain yields 0.4-V full-scale for 2-A load. Use Value: Achieves ±0.5% total measurement error over –20°C to +85°C ambient - meets PMBus v1.3 Class B accuracy requirements without calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA219BIDR | 26 V max common-mode; I²C digital output; 0.1% gain error; no ENABLE pin; 1 µA shutdown current. | Requires microcontroller I²C interface; lacks analog output flexibility and high-voltage capability for 36-V bus monitoring. | Select when digital output, integrated ADC, and lower cost outweigh need for 40-V CM range and analog interface simplicity. |
| MAX40086AUT+T | 40 V common-mode; 100 V/V gain; 50 µA quiescent current; no ENABLE; 500 pA input bias current. | Missing ENABLE functionality limits ultra-low-power duty-cycled use; lower gain restricts resolution with small shunts. | Select when ENABLE is unnecessary and tighter gain error (±0.05%) justifies trade-off in power control flexibility. |
Compared with INA190A4IDDFR, INA219BIDR offers integrated digital conversion but sacrifices 40-V common-mode range and analog output immediacy, while MAX40086AUT+T delivers superior gain accuracy yet omits ENABLE - making INA190A4IDDFR uniquely balanced for battery-constrained, high-voltage, analog-interface designs requiring microamp precision and hardware-controlled power gating.
Availability
INA190A4IDDFR is available at Aetrix Electronics and suitable for smartphone battery management, USB-C power delivery monitors, industrial IoT sensor nodes, merchant server PSU telemetry, and portable medical device current supervision requiring stable component supply and long-term production continuity.
Supply support for INA190A4IDDFR 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 INA190 product line was designed specifically for high-accuracy, low-power current sensing in space- and energy-constrained applications - targeting portable electronics, battery systems, and industrial power supplies where microamp-level resolution and 40-V common-mode tolerance are critical.
FAQ
What is the maximum common-mode voltage supported by the INA190A4IDDFR?
The INA190A4IDDFR supports a common-mode input voltage range of –0.2 V to +40 V, independent of its 1.7–5.5 V supply voltage. This allows direct high-side sensing on 36-V bus rails without level-shifting circuitry. The specification is validated per TI SBOS863D datasheet Section 6.3, with absolute maximum rating up to 42 V.
Does the INA190A4IDDFR require external components for stable operation?
Yes - the INA190A4IDDFR requires a 0.1-µF ceramic bypass capacitor placed within 2 mm of the VS pin to ensure stability and noise immunity. No external gain-setting resistors are needed since it features fixed 200 V/V internal gain. Input filtering is optional due to ultra-low 0.5-nA input bias current.
How does the ENABLE pin function on the INA190A4IDDFR?
The ENABLE pin (Pin 2 in DDF package) controls device power state: driven to VS for normal operation (65 µA IQ), pulled to GND to enter shutdown mode (≤100 nA IQ) with OUT in high-impedance state. This pin is not present in SC70 packages - confirming its exclusive availability in DDF and RSW variants per datasheet Revision History.
Can the INA190A4IDDFR measure bidirectional current with a single supply?
Yes - the INA190A4IDDFR supports true bidirectional sensing using the REF pin. Applying a mid-supply voltage (e.g., 1.25 V on 2.5-V rail) to REF centers the output, allowing positive current to raise OUT above VREF and negative current to lower OUT below VREF - all with a single 1.7–5.5 V supply.
What is the typical output voltage swing capability of the INA190A4IDDFR?
The INA190A4IDDFR provides rail-to-rail output swing: minimum output is GND + 1 mV and maximum is VS – 40 mV at TA = –40°C to +125°C. This enables full utilization of 1.8-V microcontroller ADC inputs, delivering >99% of available dynamic range without signal attenuation or level shifting.
INA190A4IDDFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- 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:
- 33 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
INA190A4IDDFR FAQ
1.How can I place an order for INA190A4IDDFR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA190A4IDDFR 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 INA190A4IDDFR reliable?
The price and inventory of INA190A4IDDFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA190A4IDDFR is usually 5 days.
3.What payment methods are accepted for INA190A4IDDFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA190A4IDDFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA190A4IDDFR?
INA190A4IDDFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA190A4IDDFR 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 INA190A4IDDFR?
For technical support, including INA190A4IDDFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA190A4IDDFR requirements.
6.How does Aetrix verify that INA190A4IDDFR is sourced from the original manufacturer or authorized distributors?
All INA190A4IDDFR 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 INA190A4IDDFR meets industry standards.
7.What is the process for return or replacement of INA190A4IDDFR?
All INA190A4IDDFR units undergo pre-shipment inspection (PSI). If there is an issue with INA190A4IDDFR, 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 INA190A4IDDFR part is unused and in its original packaging.
Return procedure for INA190A4IDDFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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