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Texas Instruments INA186A4IDDFR
- Part No.:
- INA186A4IDDFR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA186A4IDDFR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:5,034
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Product details
Overview
INA186A4IDDFR from Texas Instruments is a bidirectional, zero-drift current-sense amplifier with 200 V/V fixed gain, –0.2 V to +40 V common-mode input range, ±50 µV max offset voltage, and 48 µA typical quiescent current. It enables precision microamp-level current measurement in battery-powered portable electronics using high-side or low-side shunt configurations.
For engineers reviewing the INA186A4IDDFR datasheet, INA186A4IDDFR pinout, INA186A4IDDFR application, or INA186A4IDDFR equivalent, this page delivers verified specifications, SC70/SOT-23/DSBGA package mapping, bidirectional sensing capability with REF/ENABLE pins, and real-world use cases in notebook PC power management, smartphone battery monitoring, and server PSU current protection.
Technical Context
The INA186A4IDDFR uses a capacitively coupled front-end architecture to achieve 120 dB minimum CMRR and reject DC common-mode shifts up to ±40 V independent of its 1.7–5.5 V supply. Its zero-drift design maintains ±0.5 µV/°C offset drift and ±1% gain error across –40°C to +125°C.
This variant integrates ENABLE and REF pins on an 8-pin SOT-23 (DDF) package, supporting active-low shutdown (10 nA IQ disabled) and bidirectional current sensing via externally applied reference voltage - enabling true zero-current output centering for AC-coupled or reversible load monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 200 V/V - provides 200× amplification of shunt voltage drop; enables accurate detection of sub-100 µA currents with standard 1 Ω resistors. |
| Common-mode range | –0.2 V to +40 V - supports high-side sensing on 36-V rails and negative transient tolerance without level-shifting circuitry. |
| Offset voltage | ±50 µV max - ensures <0.05% error at 100 mV full-scale sense voltage; extends dynamic range for low-power systems. |
| Quiescent current | 48 µA typ - allows continuous monitoring in always-on battery applications with minimal standby drain. |
| CMRR | 120 dB min - rejects bus voltage ripple and noise in noisy DC-DC converter outputs during precision current readout. |
| Bandwidth | 33 kHz - sufficient for transient response in fast-switching PSUs and battery charge/discharge profiling. |
| Input bias current | 500 pA typ - permits use of high-value sense resistors (>10 kΩ) for nanoamp-level current measurement accuracy. |
Pinout & Package
The INA186A4IDDFR is housed in an 8-pin SOT-23-THIN (DDF) package measuring 2.90 mm × 1.60 mm. This variant includes ENABLE and REF pins for power-gating control and bidirectional sensing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS | Power supply input | Accepts 1.7–5.5 V single supply; powers internal amplifiers and enable logic. |
| GND | Analog ground reference | Return path for input stage, output stage, and internal bias networks; must be low-impedance. |
| IN+ | Positive current-sense input | Connects to bus side of shunt in high-side config or load side in low-side config. |
| IN– | Negative current-sense input | Connects to load side of shunt in high-side config or ground side in low-side config. |
| OUT | Analog voltage output | Delivers GAIN × (IN+ − IN–) + VREF; rail-to-rail swing (GND +1 mV to VS −40 mV). |
| REF | Bidirectional reference input | External voltage sets zero-current output level; enables symmetric positive/negative current reporting. |
| ENABLE | Digital enable control | High = active operation; low = shutdown (output high-Z, IQ < 100 nA); requires external pull-up if unused. |
| NC | No-connect terminal | Internally unconnected; may be left floating, grounded, or tied to VS per layout best practices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing with REF pin | Enables full-range current monitoring in reversible loads (e.g., battery charge/discharge) by centering output at user-defined VREF instead of GND. |
| Zero-drift architecture | Maintains ±50 µV offset and 0.5 µV/°C drift over temperature - critical for stable calibration in automotive and industrial environments. |
| Ultra-low input bias current | 500 pA typical allows >10 kΩ sense resistors for microamp-level measurements without signal attenuation or thermal drift errors. |
| Enable-controlled shutdown | Reduces supply current to <100 nA when ENABLE = GND - ideal for duty-cycled current logging in IoT edge nodes. |
| Rail-to-rail output | Swings within 1 mV of GND and 40 mV of VS - maximizes ADC utilization on 1.8-V microcontrollers without external level-shifting. |
Applications
| Smartphone Battery Monitoring | Notebook PC Power Management |
|---|---|
Use Scenario: Real-time tracking of charging/discharging current in lithium-ion battery packs during USB-C PD negotiation and adaptive fast-charging cycles. IC Role / Device Role / Timing Role: Current-sense amplifier providing bidirectional analog output proportional to battery current flow, referenced to mid-supply for polarity detection. Use Value: Enables precise coulomb counting and state-of-charge estimation using only 48 µA quiescent current, extending standby time between firmware updates. | Use Scenario: Continuous monitoring of CPU/GPU VRM output current to trigger thermal throttling or dynamic voltage scaling based on real-time load demand. IC Role / Device Role / Timing Role: High-side current sensor interfaced to system controller ADC, operating at 36-V bus with ±0.2 V common-mode tolerance. Use Value: Delivers ±1% gain accuracy and 120 dB CMRR to reject switching noise from adjacent buck converters, ensuring reliable current telemetry under full load. |
| Server PSU Current Protection | Battery Test Equipment |
Use Scenario: Overcurrent detection and reporting in 48-V merchant server power supplies, where rapid fault response prevents MOSFET failure during short-circuit events. IC Role / Device Role / Timing Role: Fast-response current monitor feeding protection logic; 33 kHz bandwidth captures sub-millisecond transients before thermal damage occurs. Use Value: Achieves <30 µs settling time and rail-to-rail output swing to maximize signal fidelity into protection comparator inputs, reducing false trips. | Use Scenario: Precision current sourcing/sinking verification in automated battery formation and grading systems requiring ±0.1% measurement repeatability across 10 nA–10 A ranges. IC Role / Device Role / Timing Role: Low-drift, low-bias amplifier used with programmable shunts to validate charge/discharge profiles per JEITA standards. Use Value: Supports microamp-level resolution via 500 pA input bias and ±50 µV offset, eliminating need for auto-zeroing circuitry in production test fixtures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA219BIDR | Integrated 12-bit ADC, I²C interface, 16 V max common-mode, no ENABLE pin, 1 mA IQ | Best for digital-output systems needing embedded calibration; unsuitable for >16 V rails or ultra-low-power always-on monitoring | Select when system MCU lacks ADC or requires calibrated digital current data; avoid for 40 V high-side or sub-100 µA sensing. |
| MAX40016AUT#T | 250 V/V gain, 2.7–5.5 V supply, 65 µA IQ, no REF pin, unidirectional only, SC70-6 | Lacks bidirectional capability and REF pin; limited to single-direction current reporting with fixed GND-referenced output | Choose for cost-sensitive, space-constrained unidirectional apps where 200 V/V gain suffices and REF functionality is unnecessary. |
Compared with INA219BIDR and MAX40016AUT#T, the INA186A4IDDFR uniquely combines 40 V common-mode tolerance, ENABLE-controlled ultra-low-power shutdown (<100 nA), and REF-based bidirectional sensing in a single 8-pin SOT-23 - making it the only option for high-accuracy, low-IQ, reversible current monitoring in 36–48 V portable and server platforms.
Availability
INA186A4IDDFR is available at Aetrix Electronics and suitable for notebook PC power management, smartphone battery monitoring, and server PSU current protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for INA186A4IDDFR 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 INA186 product line was designed specifically for high-accuracy, low-power current sensing in portable, computing, and telecom infrastructure applications - emphasizing zero-drift performance, wide common-mode operation, and flexible bidirectional capability.
FAQ
What is the maximum common-mode voltage supported by the INA186A4IDDFR?
The INA186A4IDDFR supports a common-mode input voltage range of –0.2 V to +40 V. This specification is independent of the supply voltage (1.7–5.5 V), enabling reliable high-side sensing on 36-V rails and tolerance of negative transients - a key requirement for robust operation in notebook PC and server PSU designs where bus voltages exceed supply rails.
Does the INA186A4IDDFR support bidirectional current sensing?
Yes, the INA186A4IDDFR supports bidirectional current sensing via its dedicated REF pin. When an external reference voltage (e.g., VS/2) is applied to REF, the output becomes centered at that voltage - allowing positive current flow to produce OUT > VREF and negative flow to produce OUT < VREF. This capability is confirmed for the DDF package and is essential for battery charge/discharge monitoring in smartphones and portable devices.
What is the quiescent current of the INA186A4IDDFR in enabled and disabled states?
In enabled state, the INA186A4IDDFR draws 48 µA typical quiescent current (90 µA max). When the ENABLE pin is driven low, it enters shutdown mode with <100 nA total supply current - verified across temperature and supply conditions. This ultra-low disabled IQ makes the INA186A4IDDFR suitable for battery-operated systems requiring periodic current sampling without significant standby drain.
What package type is used for the INA186A4IDDFR, and what are its dimensions?
The INA186A4IDDFR uses the 8-pin SOT-23-THIN (DDF) package with nominal body size 2.90 mm × 1.60 mm. This package includes both ENABLE and REF pins - distinguishing it from SC70 and DSBGA variants - and is optimized for high-density PCB layouts in space-constrained portable electronics such as ultrabooks and 5G baseband units.
How does the zero-drift architecture of the INA186A4IDDFR improve measurement accuracy?
The zero-drift architecture of the INA186A4IDDFR achieves ±50 µV maximum offset voltage and 0.5 µV/°C maximum offset drift over –40°C to +125°C. This minimizes temperature-induced errors in long-duration measurements and enables use of smaller sense resistors (reducing power loss) while maintaining sub-0.1% gain error - directly improving accuracy in battery test equipment and server PSU health monitoring where thermal stability is critical.
INA186A4IDDFR 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:
- 45 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
INA186A4IDDFR FAQ
1.How can I place an order for INA186A4IDDFR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA186A4IDDFR 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 INA186A4IDDFR reliable?
The price and inventory of INA186A4IDDFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA186A4IDDFR is usually 5 days.
3.What payment methods are accepted for INA186A4IDDFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA186A4IDDFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA186A4IDDFR?
INA186A4IDDFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA186A4IDDFR 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 INA186A4IDDFR?
For technical support, including INA186A4IDDFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA186A4IDDFR requirements.
6.How does Aetrix verify that INA186A4IDDFR is sourced from the original manufacturer or authorized distributors?
All INA186A4IDDFR 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 INA186A4IDDFR meets industry standards.
7.What is the process for return or replacement of INA186A4IDDFR?
All INA186A4IDDFR units undergo pre-shipment inspection (PSI). If there is an issue with INA186A4IDDFR, 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 INA186A4IDDFR part is unused and in its original packaging.
Return procedure for INA186A4IDDFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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