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Texas Instruments INA186A3IDDFR
- Part No.:
- INA186A3IDDFR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA186A3IDDFR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:4,592
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Product details
Overview
INA186A3IDDFR from Texas Instruments is a bidirectional, zero-drift current-sense amplifier with 100 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 monitoring in high-side or low-side configurations for battery-powered portable electronics.
For engineers reviewing the INA186A3IDDFR datasheet, INA186A3IDDFR pinout, INA186A3IDDFR application, or INA186A3IDDFR equivalent, this page delivers verified specifications, SC70/SOT-23/DSBGA package mapping, bidirectional sensing capability with REF/ENABLE pins, and real-world design context for notebook PC power management, smartphone battery protection, and server PSU current telemetry.
Technical Context
The INA186A3IDDFR 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 topology maintains ±0.5 µV/°C max offset drift and supports unidirectional or bidirectional operation via externally applied REF voltage (0 V to VS).
This device integrates an enable-controlled shutdown mode reducing supply current to 10 nA while placing OUT in high-impedance state. With 35 kHz small-signal bandwidth at 100 V/V gain and rail-to-rail output swing (GND + 1 mV / VS – 40 mV), it meets dynamic response requirements for fast transient detection in consumer and telecom power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 V/V - fixed ratio enabling direct conversion of 10 mV shunt drop to 1 V output for simplified ADC interfacing |
| Common-mode range | –0.2 V to +40 V - supports high-side sensing on 36-V bus rails without level-shifting, even with 1.7-V supply |
| Offset voltage | ±50 µV max - ensures <1% error at 500 µA through 100 mΩ shunt, critical for low-current battery monitoring |
| Quiescent current | 48 µA typical - extends runtime in always-on current telemetry nodes such as BBU power supervisors |
| CMRR | 120 dB min - rejects noise from noisy 40-V DC-DC converters in merchant server PSUs |
| Bandwidth | 35 kHz - captures load transients in smartphone fast-charging circuits without phase lag |
| Input bias current | 500 pA typical - permits use of ≥10 kΩ RC filters on IN+/IN− without gain/offset degradation |
Pinout & Package
SOT-23-THIN (DDF) 8-pin package: 2.90 mm × 1.60 mm body, exposed pad optional, rated for –40°C to +125°C operation. Includes ENABLE and REF pins for bidirectional control and output offset setting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VS | Power supply input | Accepts 1.7–5.5 V; powers internal amplifiers and bias networks; decoupling required within 1 mm |
| 2 - ENABLE | Digital enable input | Drives device ON when pulled to VS; places OUT in high-Z and reduces IQ to 10 nA when pulled to GND |
| 3 - REF | Reference voltage input | Sets output zero-current baseline; 0 V → unidirectional; mid-supply → bidirectional current polarity detection |
| 4 - GND | Analog ground reference | Return path for all internal circuitry; must connect to low-impedance system ground plane |
| 5 - OUT | Analog voltage output | Delivers GAIN × (IN+ − IN−) + VREF; rail-to-rail swing supports 1.8-V ADC interfacing |
| 6 - NC | No-connect terminal | Internally unconnected; may be left floating, grounded, or tied to VS per layout best practices |
| 7 - IN+ | Positive current-sense input | Connects to bus side of shunt in high-side config or load side in low-side config |
| 8 - IN− | Negative current-sense input | Connects to load side of shunt in high-side config or ground side in low-side config |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing with REF pin | Enables current direction detection in battery charge/discharge cycles by shifting output baseline with external voltage |
| Zero-drift architecture | Maintains ±50 µV offset and 0.5 µV/°C drift across –40°C to +125°C, eliminating calibration over temperature |
| Ultra-low input bias current | 500 pA typical allows >10 kΩ RC filtering on inputs without measurement error-critical for EMI-prone baseband units |
| Enable-controlled shutdown | Reduces total supply current to 10 nA during idle periods, extending battery life in always-on notebook PC subsystems |
| Rail-to-rail output | Swings to GND + 1 mV and VS – 40 mV, maximizing dynamic range for 1.8-V supply systems with 12-bit ADCs |
Applications
| Smartphone Battery Protection | Notebook PC Power Management |
|---|---|
|
Use Scenario: Real-time monitoring of charging/discharging current in Li-ion battery packs with ±2 A range and 100 µA resolution. IC Role / Device Role / Timing Role: Current-sense amplifier converting shunt voltage to analog output for MCU ADC sampling at 1 kHz. Use Value: Bidirectional capability with REF pin enables single-device detection of charge vs. discharge states; 48 µA IQ minimizes parasitic drain during sleep mode. |
Use Scenario: High-side current sensing on 19.5-V adapter input rail and 3.3-V/5-V system rails to detect overcurrent faults and optimize power delivery. IC Role / Device Role / Timing Role: Precision current monitor feeding feedback loop for adaptive voltage regulation and thermal throttling decisions. Use Value: 40-V common-mode range eliminates need for isolated amplifiers; 120 dB CMRR rejects switching noise from adjacent buck converters. |
| Merchant Server PSU Telemetry | Consumer Battery Charger Feedback |
|
Use Scenario: Monitoring output current on 12-V and 48-V server PSU rails for digital power management and predictive maintenance analytics. IC Role / Device Role / Timing Role: Analog front-end for PMBus-compliant power controller, providing accurate current data for real-time efficiency calculation. Use Value: 100 V/V gain matches standard 10-mΩ shunts to deliver 1 V/A scaling; low offset ensures <0.1% full-scale error at light loads. |
Use Scenario: Closed-loop current regulation in USB PD 3.0 chargers delivering up to 100 W, requiring ±1% accuracy across 0–5 A range. IC Role / Device Role / Timing Role: Primary current sense element in constant-current regulation loop, interfaced to PWM controller via op-amp buffer. Use Value: 35 kHz bandwidth supports fast transient response to cable insertion/removal events; enable pin synchronizes sensing with charging phases. |
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 | I²C-output digital current sensor; no REF/ENABLE pins; 16-bit ADC integrated; 26 V max VCM | Requires MCU I²C interface; lacks analog output for direct feedback loops; limited to lower-voltage rails | Select when digital telemetry and auto-ranging are prioritized over analog loop integration and 40-V operation |
| MAX4008AASA+ | 200 V/V fixed gain; 1.6–5.5 V supply; 65 µA IQ; no ENABLE pin; SC70-6 package only | Higher gain suits smaller shunts but lacks bidirectional control; no shutdown mode increases standby power | Select when higher gain is needed and enable functionality is unnecessary; verify REF-less operation fits unidirectional use case |
Compared with INA219BIDR and MAX4008AASA+, the INA186A3IDDFR uniquely combines 40-V common-mode tolerance, analog voltage output with REF/ENABLE control, and sub-50 µA quiescent current-making it optimal for analog feedback-critical, battery-sensitive, high-voltage portable power systems.
Availability
INA186A3IDDFR is available at Aetrix Electronics and suitable for notebook PC power sequencing, smartphone battery telemetry, and merchant server PSU current monitoring requiring stable component supply across extended production lifecycles.
Supply support for INA186A3IDDFR 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 family was designed specifically for ultra-low-power, high-accuracy current sensing in space-constrained portable and telecom infrastructure applications where wide common-mode range and zero-drift stability are mandatory.
FAQ
What is the maximum common-mode voltage the INA186A3IDDFR can handle?
The INA186A3IDDFR 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 external level-shifting circuitry. The specification is guaranteed across the full –40°C to +125°C operating temperature range and applies to both IN+ and IN− pins referenced to GND.
Does the INA186A3IDDFR support bidirectional current sensing?
Yes, the INA186A3IDDFR supports bidirectional current sensing via its dedicated REF pin. When a mid-supply voltage (e.g., VS/2) is applied to REF, positive differential input (IN+ > IN−) produces an output above REF, and negative differential input produces an output below REF. This enables detection of current direction in battery charge/discharge applications without additional components.
What is the purpose of the ENABLE pin on the INA186A3IDDFR?
The ENABLE pin on the INA186A3IDDFR controls device power state: driving it to VS activates normal operation with 48 µA typical quiescent current, while pulling it to GND disables the amplifier, reducing supply current to 10 nA and placing the OUT pin in high-impedance state. This feature is essential for duty-cycled current monitoring in battery-powered devices like smartphones and notebooks.
Can the INA186A3IDDFR operate from a 1.8-V supply?
Yes, the INA186A3IDDFR is fully specified for operation from 1.7 V to 5.5 V supply voltage. At 1.8 V, it maintains 35 kHz bandwidth (at 100 V/V gain), rail-to-rail output swing (GND + 1 mV / VS – 40 mV), and ±50 µV max offset voltage. This makes it compatible with modern ultra-low-voltage microcontrollers and energy-harvesting systems.
How does the zero-drift architecture benefit precision current measurement in the INA186A3IDDFR?
The zero-drift architecture in the INA186A3IDDFR achieves ±50 µV maximum offset voltage and only 0.5 µV/°C maximum offset drift over –40°C to +125°C. This eliminates the need for periodic system-level calibration and ensures consistent accuracy across temperature gradients-especially valuable in battery test equipment and server PSU telemetry where long-term stability is critical.
INA186A3IDDFR 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
INA186A3IDDFR FAQ
1.How can I place an order for INA186A3IDDFR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA186A3IDDFR 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 INA186A3IDDFR reliable?
The price and inventory of INA186A3IDDFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA186A3IDDFR is usually 5 days.
3.What payment methods are accepted for INA186A3IDDFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA186A3IDDFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA186A3IDDFR?
INA186A3IDDFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA186A3IDDFR 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 INA186A3IDDFR?
For technical support, including INA186A3IDDFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA186A3IDDFR requirements.
6.How does Aetrix verify that INA186A3IDDFR is sourced from the original manufacturer or authorized distributors?
All INA186A3IDDFR 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 INA186A3IDDFR meets industry standards.
7.What is the process for return or replacement of INA186A3IDDFR?
All INA186A3IDDFR units undergo pre-shipment inspection (PSI). If there is an issue with INA186A3IDDFR, 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 INA186A3IDDFR part is unused and in its original packaging.
Return procedure for INA186A3IDDFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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