My Inquiry
My Account
Texas Instruments INA186A2IDDFT
- Part No.:
- INA186A2IDDFT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA186A2IDDFT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:166
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
INA186A2IDDFT 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 monitoring in high-side or low-side configurations for battery-powered portable electronics.
For engineers reviewing the INA186A2IDDFT datasheet, INA186A2IDDFT pinout, INA186A2IDDFT application, or INA186A2IDDFT equivalent, this page delivers verified specifications, SC70-6 package mapping, bidirectional sensing capability with REF pin support, and real-world use cases in notebook PC power rails and smartphone battery management.
Technical Context
The INA186A2IDDFT 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 an ENABLE pin (pin 2) and REF pin (pin 1), supporting bidirectional current sensing via external reference biasing and low-power shutdown with <100 nA disabled quiescent current. The SC70-6 package supports both high-side and low-side topologies without level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V - fixed ratio enabling direct conversion of 20-mV shunt drop to 1-V output for ADC interfacing |
| Common-mode range | −0.2 V to +40 V - supports high-side sensing on 36-V bus rails while powered from 1.8-V MCU supply |
| Offset voltage | ±50 µV max - ensures ≤1% error at 5-mA load with 100-mΩ shunt, critical for light-load accuracy |
| Quiescent current | 48 µA typical - allows continuous monitoring in always-on battery subsystems with minimal runtime impact |
| CMRR | 120 dB min - rejects noise from switching regulators and bus transients during precision measurement |
| Bandwidth | 37 kHz - sufficient for DC–10-kHz current profiling in charger control loops and BMS fault detection |
| Input bias current | 500 pA typical - permits use of ≥10-kΩ RC filters without gain/offset degradation |
Pinout & Package
INA186A2IDDFT is housed in a 6-pin SC70 package (2.00 mm × 1.25 mm body size) with wettable flanks, optimized for space-constrained portable PCBs and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REF (Pin 1) | Analog reference input | Enables bidirectional sensing: output = GAIN × (IN+ − IN−) + VREF; tie to mid-supply for ± current detection |
| OUT (Pin 6) | Analog voltage output | Rail-to-rail capable (GND +1 mV to VS −40 mV); drives 10-kΩ loads directly into MCU ADC inputs |
| GND (Pin 2) | Analog ground reference | Must be connected to low-impedance system ground plane; separate from power ground for noise isolation |
| IN− (Pin 5) | Negative current-sense input | Connect to load side of shunt in high-side config; to ground side in low-side config |
| VS (Pin 3) | Power supply input | Accepts 1.7–5.5 V; decoupling with 0.1-µF ceramic capacitor required within 2 mm of pin |
| IN+ (Pin 4) | Positive current-sense input | Connect to bus side of shunt in high-side config; to load side in low-side config |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing with REF pin | Supports full-scale current flow in both directions using externally biased reference-no external op-amp needed |
| Zero-drift architecture | Maintains ±50 µV offset and 0.5 µV/°C drift over temperature-enables stable microamp measurements without calibration |
| Ultra-low input bias current | 500 pA typical-allows >10-kΩ input RC filtering for EMI suppression without signal attenuation or offset shift |
| Enable-controlled shutdown | Reduces supply current to <100 nA when ENABLE pulled low-ideal for duty-cycled battery gauging in sleep modes |
| High CMRR at dc and low frequency | 120 dB min up to 100 Hz-rejects ripple from buck converters and line-frequency interference in PSU monitoring |
Applications
| Smartphone Battery Management | Notebook PC Power Rail Monitoring |
|---|---|
|
Use Scenario: Real-time charging/discharging current tracking in lithium-ion battery protection circuits. IC Role / Device Role / Timing Role: Current-sense amplifier converting shunt voltage to scaled analog output for fuel-gauge MCU ADC sampling. Use Value: 50 V/V gain and ±50 µV offset enable ±100 mA measurement accuracy with 10-mΩ shunt, minimizing power loss and thermal drift. |
Use Scenario: Continuous monitoring of 12-V and 5-V VRM output currents to detect overcurrent faults before thermal shutdown. IC Role / Device Role / Timing Role: High-side current sensor interfacing with system controller for dynamic load balancing and thermal throttling decisions. Use Value: −0.2 V to +40 V common-mode range allows direct connection to 12-V rail without level shifters; 37-kHz bandwidth captures transient surges. |
| Consumer Battery Charger | Baseband Unit (BBU) Power Integrity |
|
Use Scenario: Precision current regulation in USB-C PD chargers delivering 20–100 W to mobile devices. IC Role / Device Role / Timing Role: Feedback element in closed-loop constant-current control loop, reporting sensed current to charge controller. Use Value: 48 µA quiescent current and ENABLE pin allow periodic wake-up sampling-extending standby battery life in wall adapters. |
Use Scenario: Monitoring individual power domains (FPGA, DSP, memory) in telecom baseband units for predictive failure analysis. IC Role / Device Role / Timing Role: Low-drift current monitor feeding telemetry data to BMC for power budgeting and anomaly detection. Use Value: 120 dB CMRR suppresses switching noise from adjacent DC/DC converters; SC70 footprint saves board area in dense BBU modules. |
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 digital output, 16-bit ADC integrated; no REF pin; 26 V max common-mode; 1 µA standby current | Requires I²C host interface; lacks analog output flexibility; limited to unidirectional sensing | Choose for systems needing digital telemetry without external ADC; avoid where analog feedback or bidirectional sensing is required |
| MAX4008AUA+ | 200 V/V gain only; no ENABLE pin; 100 µA IQ; 28 V max common-mode; SOT-23-6 package | Higher gain but no power gating; unsuitable for sub-100 µA battery monitoring; narrower voltage range | Choose for fixed high-gain, high-voltage unidirectional apps where shutdown is unnecessary; avoid for portable low-power designs |
Compared with INA186A2IDDFT, INA219BIDR trades analog flexibility and bidirectionality for integrated digital output, while MAX4008AUA+ sacrifices enable functionality and common-mode range for higher gain-neither matches the combination of 50 V/V, bidirectional analog output, and sub-100 nA shutdown in SC70.
Availability
INA186A2IDDFT is available at Aetrix Electronics and suitable for smartphone battery management, notebook PC power rail monitoring, and consumer battery charger designs requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for INA186A2IDDFT 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 ultra-low-power, high-accuracy current sensing in space- and energy-constrained portable electronics, emphasizing zero-drift stability, wide common-mode operation, and flexible bidirectional capability.
FAQ
What is the maximum common-mode voltage supported by the INA186A2IDDFT?
The INA186A2IDDFT 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 bus rails while operating from a low-voltage MCU supply. The specification is guaranteed across the full −40°C to +125°C temperature range and applies to both IN+ and IN− pins referenced to GND.
Does the INA186A2IDDFT support bidirectional current sensing, and how is it implemented?
Yes, the INA186A2IDDFT supports bidirectional current sensing via its dedicated REF pin (Pin 1). When a reference voltage (e.g., VS/2) is applied to REF, the output becomes VOUT = 50 × (IN+ − IN−) + VREF-so positive differential inputs raise VOUT above VREF, and negative differentials lower it below VREF. This eliminates need for external op-amps or level-shifting networks in applications like battery charge/discharge monitoring.
What is the function of the ENABLE pin on the INA186A2IDDFT, and what happens when it is grounded?
The ENABLE pin (Pin 2) controls device power state: when driven to VS, the INA186A2IDDFT operates normally with 48 µA typical quiescent current; when pulled to GND, it enters shutdown mode with <100 nA supply current and places the OUT pin in high-impedance state. This feature enables precise duty-cycled current sampling in battery-powered systems without external power switches or leakage paths.
Can the INA186A2IDDFT be used with a 1.8-V supply, and what is its output swing capability at that voltage?
Yes, the INA186A2IDDFT operates down to 1.7 V, making it fully compatible with 1.8-V systems. At VS = 1.8 V, its output swings from GND + 1 mV to VS − 40 mV (i.e., 1.76 V), delivering >97% of the full-scale range to 10-kΩ loads. This rail-to-rail performance maximizes ADC resolution in low-voltage portable designs without requiring output buffering.
How does the zero-drift architecture of the INA186A2IDDFT improve measurement accuracy in portable electronics?
The zero-drift architecture of the INA186A2IDDFT limits offset voltage to ±50 µV max and offset drift to 0.5 µV/°C, enabling accurate microamp-level current measurements across temperature without calibration. In smartphone battery monitoring, this ensures consistent 100-µA resolution with a 100-mΩ shunt-even during ambient temperature shifts from 0°C to 60°C-reducing firmware compensation overhead and improving fuel-gauge longevity.
INA186A2IDDFT 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
INA186A2IDDFT FAQ
1.How can I place an order for INA186A2IDDFT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA186A2IDDFT 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 INA186A2IDDFT reliable?
The price and inventory of INA186A2IDDFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA186A2IDDFT is usually 5 days.
3.What payment methods are accepted for INA186A2IDDFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA186A2IDDFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA186A2IDDFT?
INA186A2IDDFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA186A2IDDFT 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 INA186A2IDDFT?
For technical support, including INA186A2IDDFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA186A2IDDFT requirements.
6.How does Aetrix verify that INA186A2IDDFT is sourced from the original manufacturer or authorized distributors?
All INA186A2IDDFT 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 INA186A2IDDFT meets industry standards.
7.What is the process for return or replacement of INA186A2IDDFT?
All INA186A2IDDFT units undergo pre-shipment inspection (PSI). If there is an issue with INA186A2IDDFT, 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 INA186A2IDDFT part is unused and in its original packaging.
Return procedure for INA186A2IDDFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA186A2IDDFT Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
