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Texas Instruments INA186A3IDCKR
- Part No.:
- INA186A3IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
INA186A3IDCKR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,422
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Product details
Overview
INA186A3IDCKR 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 measurement in battery-powered portable electronics using SC70-6 packaging.
For engineers reviewing the INA186A3IDCKR datasheet, INA186A3IDCKR pinout, INA186A3IDCKR application, or INA186A3IDCKR equivalent, this page delivers verified specifications, SC70 package terminal mapping, bidirectional sensing context, and real-world implementation guidance for low-power, high-accuracy current monitoring in space-constrained designs.
Technical Context
The INA186A3IDCKR employs 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 the REF pin-available in DCK (SC70) and DDF packages.
This variant implements a fixed 100 V/V gain with 35 kHz small-signal bandwidth (CLOAD = 10 pF), 75 nV/√Hz input-referred voltage noise, and rail-to-rail output swing (GND + 1 mV / VS – 40 mV). The ENABLE pin is absent in SC70 (DCK), confirming always-on operation without shutdown control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 V/V fixed - sets output scaling for 10 mV shunt drop → 1 V output; eliminates external gain-setting resistors. |
| Common-mode range | –0.2 V to +40 V - supports high-side sensing on 36-V rails and low-side sensing near ground, independent of 1.7–5.5 V supply. |
| Offset voltage | ±50 µV max - enables accurate sub-mA current measurement with 10 mΩ shunt (500 nA error floor). |
| Quiescent current | 48 µA typical - allows continuous monitoring in coin-cell or energy-harvesting systems without significant battery drain. |
| CMRR | 120 dB minimum - rejects bus voltage ripple and EMI-induced common-mode transients in noisy power domains. |
| Input bias current | 500 pA typical - permits use of high-value sense resistors (>1 kΩ) for µA-range current detection without loading error. |
| Bandwidth | 35 kHz - sufficient for DC–10 kHz load transient response in battery chargers and PSU feedback loops. |
Pinout & Package
INA186A3IDCKR uses the SC70-6 (DCK) package: 2.00 mm × 1.25 mm body, 0.65 mm pitch, 6-pin surface-mount outline. The REF pin is present; ENABLE is not supported in this package variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF | Analog reference input | Enables bidirectional current sensing when externally biased (e.g., VS/2); grounded internally if unused - sets zero-current output level. |
| 2 - GND | Analog ground reference | Return path for internal circuitry and output stage; must be connected to system analog ground with low-impedance trace. |
| 3 - VS | Power supply input | Accepts 1.7–5.5 V single supply; powers amplifier core and output stage; bypass capacitor required at pin. |
| 4 - IN+ | Positive current-sense input | Connects to high-potential side of shunt (bus side in high-side, load side in low-side); high-impedance node. |
| 5 - IN− | Negative current-sense input | Connects to low-potential side of shunt (load side in high-side, ground side in low-side); matched to IN+ for CMRR. |
| 6 - OUT | Analog voltage output | Delivers GAIN × (IN+ − IN−) + VREF; rail-to-rail capable (GND + 1 mV / VS – 40 mV); drives 10-kΩ min load. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing capability | Enabled by REF pin - allows current direction detection (e.g., charge vs. discharge in battery management) without polarity reversal. |
| Zero-drift architecture | ±0.5 µV/°C max offset drift - maintains accuracy across –40°C to +125°C industrial temperature range without recalibration. |
| Low input bias current | 500 pA typical - eliminates error from shunt resistor self-heating and enables µA-level current resolution with 100-Ω sense elements. |
| Rail-to-rail output | GND + 1 mV / VS – 40 mV swing - maximizes dynamic range on 1.8-V supplies, delivering >1.7 V usable output span. |
| Wide common-mode rejection | 120 dB min CMRR - suppresses noise coupling from adjacent switching regulators or motor drivers in shared PCB regions. |
Applications
| Smartphone Battery Monitoring | USB-C PD Charger Feedback |
|---|---|
|
Use Scenario: Real-time battery charge/discharge current tracking during fast charging cycles and system sleep states. IC Role / Device Role / Timing Role: Current-sense amplifier measuring voltage across 5-mΩ shunt in battery path; REF biased to 1.25 V for bidirectional output swing. Use Value: Enables coulomb counting with <1% full-scale error over temperature, supporting precise state-of-charge estimation in constrained board area. |
Use Scenario: Accurate output current regulation in 100-W USB-C Power Delivery adapters with multi-phase buck converters. IC Role / Device Role / Timing Role: High-side current monitor on secondary-side synchronous rectifier output; interfaces to MCU ADC with 12-bit resolution. Use Value: Maintains ±1% gain accuracy across 0–5 A range while rejecting 20-V common-mode ripple from transformer leakage inductance. |
| Industrial IoT Sensor Node | Merchant Server PSU Telemetry |
|
Use Scenario: Continuous current logging for predictive maintenance in battery-backed wireless sensor nodes operating on CR2032 cells. IC Role / Device Role / Timing Role: Always-on current monitor on main 3.3-V rail; outputs to ultra-low-power SAR ADC during wake-up intervals. Use Value: 48 µA quiescent current extends 10-year battery life; 500 pA input bias avoids loading 100-kΩ series fuse resistor used for fault detection. |
Use Scenario: Input and output current telemetry in 80 PLUS Titanium server power supplies for real-time efficiency optimization. IC Role / Device Role / Timing Role: Dual-channel monitoring (high-side AC input + low-side DC output) using multiple INA186A3IDCKR units per rail. Use Value: 120 dB CMRR prevents false overcurrent trips during 100-kHz PFC switching noise; SC70 footprint minimizes layout area on dense PSU PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA2181A3IDCKR | Same SC70-6 package, identical 100 V/V gain, but adds integrated 2.5-V reference and improved PSRR (105 dB vs. 95 dB). | Eliminates external REF voltage source; better suited for systems lacking precision voltage references. | Select INA2181A3IDCKR when REF sourcing complexity must be reduced and PSRR above 100 kHz is critical. |
| MAX40016AUB+ | 50 V/V gain only, SOT-23-6 package, higher 125 µA IQ, no REF pin - unidirectional only. | Lacks bidirectional capability and zero-drift performance; limited to single-direction monitoring with relaxed accuracy needs. | Choose MAX40016AUB+ only for cost-sensitive, non-bidirectional applications where ±2% gain error and 100 µV VOS are acceptable. |
Compared with INA2181A3IDCKR and MAX40016AUB+, the INA186A3IDCKR provides the optimal balance of bidirectional operation, ultra-low IQ, and SC70 size for portable electronics - whereas alternatives trade off either functionality, accuracy, or power efficiency.
Availability
INA186A3IDCKR is available at Aetrix Electronics and suitable for smartphone battery management, USB-C PD charger feedback, and industrial IoT sensor node designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for INA186A3IDCKR 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 targets ultra-low-power, high-accuracy current sensing in space-constrained portable and battery-operated systems - emphasizing microamp-level resolution, wide common-mode tolerance, and zero-drift stability across temperature.
FAQ
What is the maximum common-mode voltage the INA186A3IDCKR can handle?
The INA186A3IDCKR supports a common-mode input voltage range from –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 battery packs or industrial rails without level-shifting circuitry, and ensures robust operation during ground bounce or negative transients in low-side configurations.
Does the INA186A3IDCKR include an enable pin for power gating?
No, the INA186A3IDCKR in the SC70-6 (DCK) package does not include an ENABLE pin. That feature is only available in the SOT-23-8 (DDF) and DSBGA-6 (YFD) variants. The INA186A3IDCKR operates continuously when powered; its 48 µA typical quiescent current makes it suitable for always-on monitoring in low-power systems.
How does the REF pin enable bidirectional current sensing in the INA186A3IDCKR?
The REF pin on the INA186A3IDCKR sets the zero-current output voltage. When biased to VS/2 (e.g., 1.25 V on 2.5-V supply), positive differential input (IN+ > IN−) produces OUT > VREF (charge current), while negative differential input (IN+ < IN−) yields OUT < VREF (discharge current). This allows full-scale bidirectional measurement with a single-ended ADC input.
What is the small-signal bandwidth of the INA186A3IDCKR at its 100 V/V gain setting?
The INA186A3IDCKR has a small-signal bandwidth of 35 kHz when driving a 10-pF load, as specified for the A3 (100 V/V) gain variant. This supports accurate current measurement for load transients up to ~3.5 kHz (10% settling), making it suitable for battery charging profiles, DC-DC converter current limiting, and motor stall detection in compact systems.
Can the INA186A3IDCKR be used with a 1.8-V supply voltage?
Yes, the INA186A3IDCKR operates from 1.7 V to 5.5 V, fully supporting 1.8-V systems. At 1.8 V, it delivers rail-to-rail output swing (GND + 1 mV / VS – 40 mV), enabling >1.7 V effective output range. Its 48 µA quiescent current and 500 pA input bias current remain valid at 1.8 V, preserving µA-level measurement capability in ultra-low-voltage designs.
INA186A3IDCKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- 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:
- 35 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:
- SC-70-6
INA186A3IDCKR FAQ
1.How can I place an order for INA186A3IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA186A3IDCKR 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 INA186A3IDCKR reliable?
The price and inventory of INA186A3IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA186A3IDCKR is usually 5 days.
3.What payment methods are accepted for INA186A3IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA186A3IDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA186A3IDCKR?
INA186A3IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA186A3IDCKR 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 INA186A3IDCKR?
For technical support, including INA186A3IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA186A3IDCKR requirements.
6.How does Aetrix verify that INA186A3IDCKR is sourced from the original manufacturer or authorized distributors?
All INA186A3IDCKR 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 INA186A3IDCKR meets industry standards.
7.What is the process for return or replacement of INA186A3IDCKR?
All INA186A3IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with INA186A3IDCKR, 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 INA186A3IDCKR part is unused and in its original packaging.
Return procedure for INA186A3IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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