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Texas Instruments INA186A2IDCKR
- Part No.:
- INA186A2IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
INA186A2IDCKR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:5,887
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Product details
Overview
INA186A2IDCKR from Texas Instruments is a bidirectional, zero-drift current-sense amplifier with 50 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 consumer electronics such as smartphones and notebook PCs using low-value shunt resistors.
For engineers reviewing the INA186A2IDCKR datasheet, INA186A2IDCKR pinout, INA186A2IDCKR application, or INA186A2IDCKR equivalent, key selection criteria include bidirectional sensing capability (enabled by REF pin), SC70-6 package compatibility with space-constrained layouts, low 0.5 nA input bias current for high-impedance sensing, and guaranteed 120 dB CMRR across –40°C to +125°C.
Technical Context
The INA186A2IDCKR 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, critical for dynamic range extension in low-current applications.
Bidirectional operation is implemented via the REF pin (present in DCK and DDF packages), allowing output offset adjustment to distinguish forward/reverse current flow. The device enters high-impedance shutdown mode when ENABLE is pulled low, reducing supply current to 10 nA - a feature confirmed for DCK package per datasheet Figure 5-1 and Table 5-1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V - fixed internal ratio; sets output voltage = 50 × (IN+ − IN−) + VREF, enabling direct scaling for 20-mV full-scale sense resistor designs. |
| Common-mode range | –0.2 V to +40 V - supports high-side sensing on 36-V rails and low-side sensing near ground without level-shifting circuitry. |
| Offset voltage | ±50 µV max - allows accurate measurement of sub-100-µA currents with 100-mΩ shunt (5 µV drop), minimizing error at light loads. |
| Quiescent current | 48 µA typical - enables >1-year battery life in periodic-monitoring applications like smartphone charge management. |
| CMRR | 120 dB minimum - rejects power-supply ripple and bus noise in noisy environments such as merchant server PSUs. |
| Bandwidth | 37 kHz - sufficient for DC–10 kHz current monitoring in battery test equipment and baseband unit thermal management. |
| Input bias current | 0.5 nA typical - permits use of RC filters (e.g., 10 kΩ + 100 pF) without degrading accuracy, unlike conventional current-sense amps. |
Pinout & Package
The INA186A2IDCKR is packaged in a 6-pin SC70 (DCK) measuring 2.00 mm × 1.25 mm, suitable for ultra-compact PCB layouts in portable devices. Pin functions are validated per TI SBOS318B datasheet Figure 5-1 and Table 5-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF | Analog reference input | Enables bidirectional current sensing; applying VREF = VS/2 centers output at mid-supply for symmetric ±current detection. |
| OUT | Analog voltage output | Delivers rail-to-rail output (GND + 1 mV to VS – 40 mV); drives ADC inputs directly without external buffering. |
| GND | Analog ground reference | Must be connected to system AGND plane; separates signal return from power return to minimize noise coupling. |
| VS | Power supply input | Accepts 1.7 V to 5.5 V; compatible with single-cell Li-ion (3.0–4.2 V) and logic rails (1.8 V, 3.3 V). |
| IN+ | Positive current-sense input | Connects to high-side bus or low-side load; handles –0.2 V to +40 V common-mode voltage regardless of VS. |
| IN− | Negative current-sense input | Connects to low-side ground or high-side load; differential input accepts ±100 mV full-scale for 50 V/V gain. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing with REF pin | Supports reversible current flow detection in battery charging/discharging paths without external op-amps or polarity switches. |
| Zero-drift architecture | Maintains ±50 µV offset and 0.5 µV/°C drift over –40°C to +125°C, eliminating calibration drift in automotive cabin modules. |
| Low 0.5 nA input bias current | Allows use of large-value RC filters (e.g., 100 kΩ + 1 nF) to suppress EMI without introducing gain or offset errors. |
| Enable-controlled shutdown | Reduces supply current to 10 nA when ENABLE = GND, extending runtime in duty-cycled applications like IoT sensor nodes. |
| Rail-to-rail output swing | Delivers GND + 1 mV to VS – 40 mV output range, maximizing ADC utilization on 1.8-V systems with 12-bit resolution. |
Applications
| Smartphone Battery Management | Notebook PC Power Monitoring |
|---|---|
Use Scenario: Real-time charging/discharging current tracking during fast-charge cycles and standby modes. IC Role / Device Role / Timing Role: Current-sense amplifier measuring voltage drop across 5-mΩ shunt at 0–5 A range, interfacing to PMIC ADC. Use Value: Enables precise Coulomb counting with <0.5% total error due to ±1% gain error and ±50 µV offset, improving battery life estimation accuracy. | Use Scenario: Dynamic power budgeting across CPU, GPU, and display subsystems under varying thermal loads. IC Role / Device Role / Timing Role: High-side current monitor on 19.5-V adapter input rail, reporting to EC via analog input. Use Value: Supports 40-V common-mode range to tolerate adapter transients while maintaining 120 dB CMRR against SMPS noise. |
| Consumer Battery Charger | Baseband Unit (BBU) Thermal Control |
Use Scenario: Precision current regulation during CC/CV charging phases for Li-ion packs. IC Role / Device Role / Timing Role: Bidirectional amplifier with REF = 1.25 V (VS = 2.5 V), detecting charge/discharge direction and magnitude. Use Value: 50 V/V gain and 37 kHz bandwidth capture transient load steps within 30 µs settling time, preventing overvoltage faults. | Use Scenario: Monitoring power amplifier supply current to trigger thermal throttling before junction temperature exceeds 105°C. IC Role / Device Role / Timing Role: Low-quiescent-current (48 µA) monitor on +28-V PA rail, operating continuously without draining backup batteries. Use Value: 0.5 nA input bias current avoids loading 100-Ω sense resistor, preserving <1% measurement accuracy at 100 mA nominal current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA2181A2IDCKR | Same SC70-6 package and 50 V/V gain, but adds integrated 2.5-V reference and improved 0.2-µV/°C offset drift. | Eliminates external REF voltage source; better suited for factory-calibrated systems requiring long-term stability. | Select INA2181A2IDCKR when reference buffering complexity must be reduced and drift-critical applications demand <0.3 µV/°C performance. |
| MAX40016AUA+T | 40-V common-mode, 50 V/V gain, but higher 100 µA quiescent current and no REF pin - unidirectional only. | Lacks bidirectional capability; requires separate comparator for reverse-current detection in battery protection circuits. | Select MAX40016AUA+T only for cost-sensitive, unidirectional applications where 48 µA vs. 100 µA IQ is not critical and REF functionality is unused. |
Compared with INA186A2IDCKR, INA2181A2IDCKR offers lower drift and integrated reference at minor cost premium, while MAX40016AUA+T sacrifices bidirectionality and power efficiency for broader vendor availability - making INA186A2IDCKR optimal for space-constrained, bidirectional, ultra-low-power designs.
Availability
INA186A2IDCKR is available at Aetrix Electronics and suitable for smartphone battery management, notebook PC power monitoring, and baseband unit thermal control requiring stable component supply across high-volume production cycles.
Supply support for INA186A2IDCKR 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers and power management ICs.
The INA186 product line delivers ultra-low-power, zero-drift current sensing for battery-operated and energy-efficient systems, targeting applications where microamp-level accuracy and 40-V common-mode tolerance are essential.
FAQ
What is the maximum common-mode voltage supported by the INA186A2IDCKR?
The INA186A2IDCKR supports a common-mode input voltage range of –0.2 V to +40 V, independent of its 1.7 V to 5.5 V supply voltage. This allows high-side sensing on 36-V rails and low-side sensing near ground without external level-shifting components. The specification is guaranteed across the full –40°C to +125°C operating temperature range per TI SBOS318B datasheet Section 6.3.
Does the INA186A2IDCKR support bidirectional current sensing?
Yes, the INA186A2IDCKR supports bidirectional current sensing via its REF pin, which is present in the SC70 (DCK) package. Applying a reference voltage (e.g., VS/2) to the REF pin centers the output voltage, enabling detection of both positive and negative differential inputs. This functionality is confirmed in TI SBOS318B datasheet Sections 7.3.4 and Figure 5-1, and distinguishes INA186A2IDCKR from unidirectional alternatives like MAX40016AUA+T.
What is the typical quiescent current of the INA186A2IDCKR, and how does it change in shutdown mode?
INA186A2IDCKR draws 48 µA typical quiescent current during normal operation and reduces to 10 nA when the ENABLE pin is driven low. This shutdown capability is validated for the DCK package in TI SBOS318B datasheet Section 7.3.3 and Figure 6-9, making INA186A2IDCKR suitable for battery-powered applications requiring periodic current sampling with minimal average power consumption.
What package type and dimensions does the INA186A2IDCKR use?
The INA186A2IDCKR uses the SC70-6 (DCK) package with nominal body size 2.00 mm × 1.25 mm and 0.65-mm lead pitch. This compact footprint is specified in TI SBOS318B datasheet Table 3-1 and supports high-density layouts in smartphones and ultrabooks. Pin configuration matches Figure 5-1, confirming REF, OUT, GND, VS, IN+, and IN− terminals.
How does the zero-drift architecture of the INA186A2IDCKR improve measurement accuracy?
The zero-drift architecture of the INA186A2IDCKR maintains ±50 µV maximum offset voltage and 0.5 µV/°C maximum offset drift over –40°C to +125°C. This extends dynamic range for low-current measurements (e.g., µA-level battery leakage) and enables smaller sense resistors with lower I²R loss. These specifications are measured per TI SBOS318B datasheet Section 6.5 Electrical Characteristics and directly impact total error in precision current monitoring systems.
INA186A2IDCKR 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:
- 37 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
INA186A2IDCKR FAQ
1.How can I place an order for INA186A2IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA186A2IDCKR 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 INA186A2IDCKR reliable?
The price and inventory of INA186A2IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA186A2IDCKR is usually 5 days.
3.What payment methods are accepted for INA186A2IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA186A2IDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA186A2IDCKR?
INA186A2IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA186A2IDCKR 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 INA186A2IDCKR?
For technical support, including INA186A2IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA186A2IDCKR requirements.
6.How does Aetrix verify that INA186A2IDCKR is sourced from the original manufacturer or authorized distributors?
All INA186A2IDCKR 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 INA186A2IDCKR meets industry standards.
7.What is the process for return or replacement of INA186A2IDCKR?
All INA186A2IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with INA186A2IDCKR, 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 INA186A2IDCKR part is unused and in its original packaging.
Return procedure for INA186A2IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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