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Texas Instruments INA186A1IDDFT
- Part No.:
- INA186A1IDDFT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA186A1IDDFT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:7,893
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Product details
Overview
INA186A1IDDFT from Texas Instruments is a bidirectional, zero-drift current-sense amplifier with 25 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 microamp-level current measurement in battery-powered consumer electronics using low-value shunt resistors.
For engineers reviewing the INA186A1IDDFT datasheet, INA186A1IDDFT pinout, INA186A1IDDFT application, or INA186A1IDDFT equivalent, key selection criteria include enable-pin support for power cycling, SC70-6 package footprint compatibility, bidirectional sensing capability via REF pin, and guaranteed 120 dB CMRR across –40°C to +125°C.
Technical Context
The INA186A1IDDFT uses a capacitively coupled front-end architecture to achieve high common-mode rejection (120 dB min) independent of supply voltage, enabling accurate sensing at bus voltages up to +40 V while operating from as low as 1.7 V. Its zero-drift design maintains ±50 µV offset and 0.5 µV/°C drift over temperature.
It integrates an ENABLE pin (pin 2) that places the output in high-impedance state and reduces supply current to 10 nA when driven low, supporting periodic current monitoring in portable systems. The REF pin (pin 1) allows bidirectional operation by offsetting the output baseline, with internal grounding only in non-REF variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 25 V/V - fixed ratio converting shunt voltage to output; enables 40-mA full-scale with 100-mΩ resistor at 1-V output |
| Common-mode range | –0.2 V to +40 V - supports high-side sensing on 36-V rails without level-shifting or supply boosting |
| Offset voltage | ±50 µV max - ensures <1% error at 5-mV sense voltage; extends dynamic range for low-current detection |
| Quiescent current | 48 µA typical - enables >1-year battery life in duty-cycled IoT sensor nodes powered by coin cells |
| CMRR | 120 dB minimum - rejects noise from switching regulators or motor drivers interfering with shunt measurements |
| Bandwidth | 45 kHz - sufficient for DC–10-kHz current monitoring in USB-C PD chargers and notebook power rails |
| Input bias current | 500 pA typical - permits use of ≥10-kΩ RC filters without accuracy loss; enables µA-range current sensing |
Pinout & Package
INA186A1IDDFT is packaged in a 6-pin SC70 (DCK) package measuring 2.00 mm × 1.25 mm with 0.65-mm pitch. This RoHS-compliant, surface-mount package supports reflow soldering and provides thermal resistance of 170.7°C/W (junction-to-ambient).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF (Pin 1) | Analog reference input | Enables bidirectional current sensing; output = GAIN × (IN+ − IN−) + VREF; grounded internally if not present |
| GND (Pin 2) | Analog ground | Reference node for all analog signals; must be connected to low-impedance system ground plane |
| VS (Pin 3) | Power supply | Single 1.7–5.5 V rail; powers internal amplifiers and enable logic; decoupling capacitor required |
| IN+ (Pin 4) | Positive current-sense input | Connects to bus side of shunt in high-side config; load side in low-side config |
| IN− (Pin 5) | Negative current-sense input | Connects to load side of shunt in high-side config; ground side in low-side config |
| OUT (Pin 6) | Analog output | Voltage-output stage with rail-to-rail swing (GND +1 mV to VS −40 mV); high-Z when ENABLE = GND |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing | Enabled via external REF voltage; supports charge/discharge monitoring in battery management without polarity reversal |
| Zero-drift architecture | Maintains ±50 µV offset and 0.5 µV/°C drift over –40°C to +125°C; eliminates calibration for production temperature spread |
| Enable-controlled shutdown | Reduces IQ to 10 nA; output enters high-Z state-enables multiplexed current monitoring across multiple rails |
| Low input bias current | 500 pA typical allows ≥10-kΩ RC filtering without gain/offset error; critical for precision µA-level measurements |
| Rail-to-rail output | Swings to GND +1 mV and VS −40 mV; maximizes usable dynamic range on 1.8-V supplies for compact portable designs |
Applications
| Smartphone Battery Monitoring | Notebook PC Power Rail Sensing |
|---|---|
Use Scenario: Real-time charging/discharging current tracking in Li-ion battery packs during fast-charge cycles and standby modes. IC Role / Device Role / Timing Role: Current-sense amplifier converting shunt voltage to analog output for ADC sampling by system PMIC or MCU. Use Value: 500 pA input bias enables stable µA-level sleep-current measurement; 48 µA IQ minimizes self-consumption during continuous monitoring. | Use Scenario: High-side current monitoring on 12-V and 19-V adapter input rails and 3.3-V/5-V system rails in ultrabooks. IC Role / Device Role / Timing Role: Precision current-shunt monitor interfacing with embedded controller for thermal throttling and power budgeting. Use Value: 40-V common-mode range supports direct connection to unregulated adapter inputs; 120 dB CMRR rejects switching noise from buck converters. |
| USB-C Power Delivery Tester | Merchant Server PSU Health Monitoring |
Use Scenario: Lab-grade validation of USB-C PD source/sink compliance, including inrush, steady-state, and fault-current profiling. IC Role / Device Role / Timing Role: Bidirectional current amplifier feeding calibrated data acquisition system with REF-biased output for polarity detection. Use Value: REF pin enables true bidirectional output swing centered at mid-supply; ±1% gain error ensures traceable measurement within ±0.5% test limits. | Use Scenario: Continuous current monitoring across redundant 12-V and 48-V output rails in cloud infrastructure PSUs for predictive failure analysis. IC Role / Device Role / Timing Role: High-accuracy shunt amplifier providing analog feedback to digital power controller for real-time load balancing. Use Value: Zero-drift performance ensures long-term stability over 10-year field life; SC70 package enables dense placement near high-current traces. |
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 and I²C interface; no REF pin; 26 V max common-mode; 100 µA IQ | Best for digital-output systems requiring host MCU I²C polling; unsuitable for analog-loop feedback | Select when system already uses I²C and requires on-chip ADC; avoid when analog output or >26 V sensing is needed |
| MAX40016AUT+T | 200 kHz bandwidth; 1.8–5.5 V supply; no enable pin; 100 µA IQ; 2.7–28 V common-mode | Optimized for high-speed transient detection (e.g., overcurrent protection), not precision DC measurement | Select for fast fault response in power supplies; avoid when µA-level accuracy or enable-controlled sleep is required |
Compared with INA219BIDR and MAX40016AUT+T, the INA186A1IDDFT uniquely combines ultra-low IQ (48 µA), enable functionality, REF-based bidirectionality, and 40-V common-mode range-making it optimal for battery-constrained, analog-feedback, high-voltage current monitoring where precision and power efficiency are co-prioritized.
Availability
INA186A1IDDFT is available at Aetrix Electronics and suitable for smartphone battery management, notebook PC power rail sensing, and USB-C PD tester applications requiring stable component supply, long-lifecycle availability, and consistent parametric performance across production batches.
Supply support for INA186A1IDDFT 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 space-constrained, battery-operated, and high-common-mode industrial and consumer systems-emphasizing zero-drift stability, enable-controlled energy savings, and flexible bidirectional operation.
FAQ
What is the maximum common-mode voltage supported by the INA186A1IDDFT?
The INA186A1IDDFT supports a common-mode input voltage range of –0.2 V to +40 V. This specification is independent of the supply voltage (1.7 V to 5.5 V), allowing the device to accurately sense current on high-side rails such as 36-V industrial buses or 40-V USB-C PD sources without external level-shifting circuitry. The absolute maximum rating is ±42 V differential, but operational integrity is guaranteed only within the –0.2 V to +40 V range.
Does the INA186A1IDDFT support bidirectional current sensing, and how is it implemented?
Yes, the INA186A1IDDFT supports bidirectional current sensing via its REF pin (Pin 1). When a reference voltage (typically VS/2) is applied to REF, the output becomes VOUT = 25 × (IN+ − IN−) + VREF. A positive differential input yields VOUT > VREF; a negative differential yields VOUT < VREF. This enables charge/discharge detection in battery systems. Devices without a REF pin (e.g., DSBGA variants) default to unidirectional operation with REF internally grounded.
What is the purpose of the ENABLE pin on the INA186A1IDDFT, and what happens when it is pulled low?
The ENABLE pin (Pin 2) on the INA186A1IDDFT controls device power state. When driven to VS, the device operates normally with 48 µA typical quiescent current. When pulled to GND, the amplifier shuts down: supply current drops to 10 nA (typical), and the OUT pin enters a high-impedance state. This feature is essential for battery-powered applications requiring periodic current sampling, as it eliminates output loading and leakage during idle periods-extending operational lifetime significantly.
How does the zero-drift architecture of the INA186A1IDDFT improve measurement accuracy over temperature?
The zero-drift architecture of the INA186A1IDDFT actively corrects input offset voltage and its drift, guaranteeing ±50 µV maximum offset and 0.5 µV/°C maximum drift over –40°C to +125°C. This eliminates the need for system-level calibration across temperature, ensures consistent µA-level resolution at light loads, and enables use of smaller, lower-loss shunt resistors (e.g., 10 mΩ instead of 100 mΩ) without sacrificing accuracy-directly improving power efficiency in portable devices.
What package type and footprint does the INA186A1IDDFT use, and is it compatible with standard reflow processes?
The INA186A1IDDFT uses the SC70-6 (DCK) package: 2.00 mm × 1.25 mm body size, 0.65-mm lead pitch, and RoHS-compliant matte-tin terminations. It is fully compatible with standard lead-free reflow soldering profiles (J-STD-020), including peak temperatures up to 260°C. The small footprint supports high-density PCB layouts in space-constrained applications like smartphones and ultrabooks, and its thermal resistance (RθJA = 170.7°C/W) is validated for continuous operation at full specification under typical board conditions.
INA186A1IDDFT 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:
- Obsolete
- 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
INA186A1IDDFT FAQ
1.How can I place an order for INA186A1IDDFT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA186A1IDDFT 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 INA186A1IDDFT reliable?
The price and inventory of INA186A1IDDFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA186A1IDDFT is usually 5 days.
3.What payment methods are accepted for INA186A1IDDFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA186A1IDDFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA186A1IDDFT?
INA186A1IDDFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA186A1IDDFT 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 INA186A1IDDFT?
For technical support, including INA186A1IDDFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA186A1IDDFT requirements.
6.How does Aetrix verify that INA186A1IDDFT is sourced from the original manufacturer or authorized distributors?
All INA186A1IDDFT 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 INA186A1IDDFT meets industry standards.
7.What is the process for return or replacement of INA186A1IDDFT?
All INA186A1IDDFT units undergo pre-shipment inspection (PSI). If there is an issue with INA186A1IDDFT, 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 INA186A1IDDFT part is unused and in its original packaging.
Return procedure for INA186A1IDDFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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