My Inquiry
My Account
Texas Instruments INA186A1IDDFR
- Part No.:
- INA186A1IDDFR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA186A1IDDFR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:11,875
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
INA186A1IDDFR 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 precision microamp-level current measurement in high-side or low-side configurations for battery-powered portable electronics.
For engineers reviewing the INA186A1IDDFR datasheet, INA186A1IDDFR pinout, INA186A1IDDFR application, or INA186A1IDDFR equivalent, key selection considerations include its enable pin functionality, REF-pin–enabled bidirectional sensing, rail-to-rail output swing (GND + 1 mV / VS – 40 mV), and compatibility with 1.7–5.5 V supplies in space-constrained SOT-23-THIN (DDF) packaging.
Technical Context
The INA186A1IDDFR 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 supply voltage. Its zero-drift design maintains ±0.5 µV/°C max offset drift and supports unidirectional or bidirectional sensing via externally applied REF voltage (0 V to VS).
It integrates an enable pin (pin 2) that reduces supply current to 10 nA typical in shutdown mode while placing OUT in high-impedance state. The device operates across –40°C to +125°C and delivers 35 kHz bandwidth at 25 V/V gain with 0.3 V/µs slew rate and 30 µs settling time to 1%.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 25 V/V - fixed ratio; converts 10 mV shunt drop to 250 mV output for ADC interface |
| Common-mode range | –0.2 V to +40 V - supports high-side sensing on 36-V bus with 1.8-V supply |
| Offset voltage | ±50 µV max - enables accurate sub-mA current measurement with 100 mΩ shunt |
| Quiescent current | 48 µA typical - extends battery life in always-on monitoring circuits |
| CMRR | 120 dB min - rejects noise from noisy power rails during precision sensing |
| Bandwidth | 35 kHz - sufficient for DC–10 kHz current transients in PSU and battery protection |
| Output swing | GND + 1 mV / VS – 40 mV - maximizes dynamic range on 1.8-V supply |
Pinout & Package
SOT-23-THIN (DDF) package: 2.90 mm × 1.60 mm body, 0.95 mm height, 8-pin surface-mount with exposed pad option (not electrically connected). Pin 1 = VS, Pin 2 = ENABLE, Pin 3 = REF, Pin 4 = GND, Pin 5 = OUT, Pin 6 = NC, Pin 7 = IN+, Pin 8 = IN–.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS (Pin 1) | Power supply input | Accepts 1.7–5.5 V; powers internal amplifiers and bias circuitry |
| ENABLE (Pin 2) | Digital control input | Drives device ON (≥0.7×VS) or OFF (≤0.3×VS); reduces IQ to 10 nA in shutdown |
| REF (Pin 3) | Bidirectional offset reference | Set to mid-supply for ± current sensing; grounded for unidirectional mode |
| GND (Pin 4) | Analog ground reference | Return path for input stage and output buffer; must be low-impedance |
| OUT (Pin 5) | Voltage output | Delivers GAIN × (IN+ − IN−) + VREF; high-impedance when ENABLE = LOW |
| NC (Pin 6) | No connection | Internally unconnected; may be left floating, grounded, or tied to VS |
| IN+ (Pin 7) | Positive current-sense input | Connect to bus side (high-side) or load side (low-side) of shunt resistor |
| IN− (Pin 8) | Negative current-sense input | Connect to load side (high-side) or ground side (low-side) of shunt resistor |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing with REF pin | Enables detection of charge/discharge current direction in battery management using single shunt |
| Zero-drift architecture | Maintains ±50 µV offset and 0.5 µV/°C drift over –40°C to +125°C for stable long-term accuracy |
| Ultra-low input bias current | 500 pA typical allows use of >1 kΩ sense resistors for µA-level current resolution |
| Rail-to-rail output | Swings to GND + 1 mV and VS – 40 mV-critical for full-scale utilization on 1.8-V systems |
| Enable-controlled shutdown | Reduces total supply current to 10 nA, enabling periodic wake-up current monitoring without system-level power cycling |
Applications
| Smartphone Battery Monitoring | Merchant Server PSU |
|---|---|
Use Scenario: Real-time charge/discharge current tracking in lithium-ion battery packs during fast charging and system sleep states. IC Role / Device Role / Timing Role: Current-sense amplifier measuring bidirectional current across a 10-mΩ shunt, interfaced to MCU ADC with REF biased at VS/2. Use Value: Enables coulomb counting with <1% gain error and <50 µV offset, supporting accurate state-of-charge estimation over temperature. | Use Scenario: High-side current monitoring on +12 V and +48 V output rails of multi-phase server power supplies. IC Role / Device Role / Timing Role: Precision shunt amplifier operating at 40 V common-mode with 1.8 V supply, feeding analog feedback loop for digital PWM controllers. Use Value: Delivers 120 dB CMRR to reject switching noise from adjacent MOSFETs while maintaining ±1% gain accuracy across line/load transients. |
| Standard Notebook PC | Consumer Battery Charger |
Use Scenario: Low-side current sensing on USB-C PD input and battery charge path to enforce safety limits and optimize thermal management. IC Role / Device Role / Timing Role: Zero-drift amplifier with ENABLE pin synchronized to system power states to minimize idle current draw. Use Value: Achieves 48 µA quiescent current and 30 µs settling time-enabling 100-Hz current sampling without ADC aliasing or supply droop. | Use Scenario: Bidirectional current measurement in smart wall adapters supporting USB-PD 3.0 programmable power supply profiles. IC Role / Device Role / Timing Role: Current-shunt monitor with REF pin configured for ±1 A sensing range, driving isolated sigma-delta ADC. Use Value: Supports microamp-level no-load current detection and 500 ppm/°C total error budget over –20°C to +70°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA2181A1IDDFR | Same 25 V/V gain, but dual-channel; higher 75 µA IQ; no ENABLE pin; identical DDF package | Requires two independent current paths; lacks power-gating capability for ultra-low-power duty cycling | Select when dual sensing is needed and enable control is unnecessary |
| MAX40016ATA+ | 20 V/V gain; 1.6–5.5 V supply; 60 µA IQ; no REF pin; SC70-6 package; 110 dB CMRR | Unidirectional only; lower CMRR limits high-noise rail use; smaller footprint but no enable function | Select for cost-sensitive, space-constrained unidirectional apps where 120 dB CMRR is not required |
Compared with INA2181A1IDDFR and MAX40016ATA+, the INA186A1IDDFR uniquely combines enable control, REF-based bidirectionality, 120 dB CMRR, and 48 µA IQ in an 8-pin SOT-23-making it optimal for battery-aware, dual-direction current monitoring where layout area and power budget are tightly constrained.
Availability
INA186A1IDDFR is available at Aetrix Electronics and suitable for smartphone battery monitoring, merchant server PSU feedback, and standard notebook PC power management requiring stable component supply and guaranteed long-term sourcing.
Supply support for INA186A1IDDFR 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 signal chain and power management ICs.
The INA186 product line is designed for high-accuracy, low-power current sensing in portable, battery-powered, and energy-efficient systems-emphasizing zero-drift performance, wide common-mode operation, and enable-controlled power gating.
FAQ
What is the maximum common-mode voltage the INA186A1IDDFR can handle?
The INA186A1IDDFR 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 powered from a 1.8-V LDO. The specification is validated across –40°C to +125°C and applies to both IN+ and IN– pins referenced to GND.
Does the INA186A1IDDFR support bidirectional current sensing?
Yes, the INA186A1IDDFR supports bidirectional current sensing via its dedicated REF pin (Pin 3). When a reference voltage (e.g., VS/2) is applied to REF, positive differential inputs produce OUT > VREF, and negative differentials produce OUT < VREF. This enables single-shunt charge/discharge monitoring in battery applications without polarity-switching circuitry.
What is the purpose of the ENABLE pin on the INA186A1IDDFR?
Pin 2 (ENABLE) controls power state: driven to ≥0.7×VS to activate normal operation (48 µA IQ), or ≤0.3×VS to enter shutdown (10 nA IQ) with OUT placed in high-impedance state. This feature is exclusive to DDF and YFD packages and enables duty-cycled current monitoring in battery-powered systems without external power switches.
Can the INA186A1IDDFR operate from a 1.8-V supply?
Yes, the INA186A1IDDFR is fully specified for 1.7–5.5 V operation. At 1.8 V, it maintains ±50 µV max offset, 120 dB CMRR, 35 kHz bandwidth, and rail-to-rail output swing (GND + 1 mV / 1.8 V – 40 mV). Its low 48 µA quiescent current ensures minimal impact on 1.8-V rail stability in portable designs.
What is the gain accuracy and drift specification for the INA186A1IDDFR?
The INA186A1IDDFR has a fixed gain of 25 V/V with ±1% maximum gain error over temperature and process variation. Gain drift is limited to 10 ppm/°C maximum, ensuring stable scaling across –40°C to +125°C. These parameters are measured under recommended operating conditions and directly impact end-system current measurement linearity and calibration interval requirements.
INA186A1IDDFR 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
INA186A1IDDFR FAQ
1.How can I place an order for INA186A1IDDFR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA186A1IDDFR 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 INA186A1IDDFR reliable?
The price and inventory of INA186A1IDDFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA186A1IDDFR is usually 5 days.
3.What payment methods are accepted for INA186A1IDDFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA186A1IDDFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA186A1IDDFR?
INA186A1IDDFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA186A1IDDFR 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 INA186A1IDDFR?
For technical support, including INA186A1IDDFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA186A1IDDFR requirements.
6.How does Aetrix verify that INA186A1IDDFR is sourced from the original manufacturer or authorized distributors?
All INA186A1IDDFR 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 INA186A1IDDFR meets industry standards.
7.What is the process for return or replacement of INA186A1IDDFR?
All INA186A1IDDFR units undergo pre-shipment inspection (PSI). If there is an issue with INA186A1IDDFR, 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 INA186A1IDDFR part is unused and in its original packaging.
Return procedure for INA186A1IDDFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA186A1IDDFR 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…
