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Texas Instruments INA190A2IDDFR
- Part No.:
- INA190A2IDDFR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA190A2IDDFR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:6,870
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Product details
Overview
INA190A2IDDFR from Texas Instruments is a bidirectional, zero-drift, precision current-sense amplifier with 50 V/V fixed gain, ±15 µV max offset voltage, and –0.2 V to +40 V common-mode input range. It operates from 1.7 V to 5.5 V supply, draws 48 µA quiescent current (typ), and features an ENABLE pin for low-power shutdown mode. It is used in high-accuracy battery charge monitoring and server PSU overcurrent protection.
For engineers reviewing the INA190A2IDDFR datasheet, INA190A2IDDFR pinout, INA190A2IDDFR application, or INA190A2IDDFR equivalent, this page delivers verified specifications, validated SOT-23-8 pin mapping, confirmed bidirectional sensing capability with REF-pin offset control, and two technically documented alternative parts for microamp-level current measurement in space-constrained, wide common-mode systems.
Technical Context
The INA190A2IDDFR employs a capacitively coupled front-end architecture to achieve 132 dB min CMRR and block DC common-mode voltage from downstream stages-enabling accurate sensing at bus voltages up to +40 V while powered from as low as 1.7 V. Its zero-drift design maintains ±15 µV max VOS and 80 nV/°C max drift across –40°C to +125°C.
It supports both high-side and low-side configurations via independent IN+ and IN– inputs, and uses the REF pin to establish bidirectional output centering (e.g., VREF = VS/2 yields symmetric ±VOUT swing). The ENABLE pin (pin 2 in DDF package) reduces supply current to ≤100 nA and places OUT in high-Z state when driven to GND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V - fixed ratio; converts 10 mV sense voltage to 500 mV output, enabling precise microamp-range current resolution with low RSENSE. |
| Offset Voltage (VOS) | ±15 µV max - enables accurate measurement near zero current; critical for detecting leakage or standby load currents. |
| Common-Mode Range | –0.2 V to +40 V - supports direct high-side sensing on 36-V rails without level-shifting or auxiliary supplies. |
| Supply Voltage (VS) | 1.7 V to 5.5 V - compatible with single-cell Li-ion, USB-powered, and industrial 3.3 V/5 V systems. |
| Quiescent Current (IQ) | 48 µA typ at 25°C - allows continuous monitoring in battery-backed IoT nodes with multi-year runtime. |
| CMRR | 132 dB min - rejects noise from noisy power rails (e.g., buck converter switching edges) without degrading measurement fidelity. |
| Bandwidth | 37 kHz - sufficient for DC–10 kHz current transients in PSU fault detection and motor stall sensing. |
| Input Bias Current | 0.5 nA typ - permits use of large-value RC filters (e.g., 1 MΩ || 100 nF) without gain/offset error. |
Pinout & Package
INA190A2IDDFR is packaged in an 8-pin Thin SOT-23 (DDF) with 1.60 mm × 2.90 mm body size and exposed thermal pad (not electrically connected). Pin 1 is marked by dot; pin numbering follows standard SOT-23 counterclockwise from notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VS | Analog power supply input; must be decoupled with ≥0.1 µF ceramic capacitor close to pin. |
| 2 | ENABLE | Digital enable control; drive to VS for active operation, GND for shutdown (≤100 nA IQ, high-Z OUT). |
| 3 | REF | Bidirectional offset reference; sets output center point (e.g., 2.5 V for ±2.5 V swing with 5 V supply). |
| 4 | GND | Analog ground return; connect directly to PCB ground plane under device for low-noise performance. |
| 5 | OUT | Voltage-output terminal; rail-to-rail capable (GND +1 mV to VS –40 mV); drives 10 kΩ loads. |
| 6 | IN– | Negative current-sense input; connects to load side (high-side) or ground side (low-side) of shunt resistor. |
| 7 | IN+ | Positive current-sense input; connects to bus side (high-side) or load side (low-side) of shunt resistor. |
| 8 | NC | No internal connection; leave floating or tie to GND/VS per layout best practice (no electrical effect). |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | ±15 µV max VOS and 80 nV/°C max drift ensure stable baseline over temperature-critical for long-duration battery capacity tracking. |
| Capacitively coupled input stage | Blocks DC common-mode voltage, enabling 132 dB CMRR and immunity to bus-voltage drift or ripple in high-side sensing. |
| Enable-controlled shutdown | Reduces total supply current to ≤100 nA and disables output (high-Z), eliminating loading during idle cycles in duty-cycled monitoring. |
| 50 V/V fixed gain | Optimized for 10–100 mΩ shunts at 1–10 A ranges; delivers full-scale output at 500 mV for 10 mV drop-maximizing ADC utilization. |
| Bidirectional sensing support | REF pin allows user-defined output center voltage (e.g., 1.65 V on 3.3 V system), enabling detection of forward/reverse current flow in H-bridge drivers. |
| Low input bias current (0.5 nA) | Enables use of high-impedance RC filters (e.g., 1 MΩ + 100 nF) without signal attenuation-essential for EMI suppression in noisy industrial environments. |
Applications
| Smartphone Battery Management | Server PSU Overcurrent Protection |
|---|---|
|
Use Scenario: Real-time charging/discharging current monitoring in compact smartphone PMIC subsystems with tight thermal and space constraints. IC Role / Device Role / Timing Role: Precision current-sense amplifier converting mV-level shunt voltage to clean analog output for ADC sampling at 1–10 Hz. Use Value: ±0.2% gain error and ±15 µV offset enable <1% full-scale current accuracy across –20°C to +60°C, supporting precise SOC estimation. |
Use Scenario: High-speed overcurrent detection in 48 V merchant server PSUs where bus transients exceed 36 V and response time <100 µs is required. IC Role / Device Role / Timing Role: High-CMRR current monitor feeding fast comparator or µC ADC to trigger shutdown within 30 µs of fault onset. Use Value: –0.2 V to +40 V common-mode range and 37 kHz bandwidth allow direct sensing on primary-side rails without isolation or attenuation networks. |
| USB-C PD Power Delivery Tester | Industrial PLC Analog Input Module |
|
Use Scenario: Bidirectional current validation in USB-C PD compliance test fixtures verifying sink/source behavior across 5–20 V profiles. IC Role / Device Role / Timing Role: REF-pin-biased current-sense amplifier delivering symmetric ±2.5 V output for differential ADC input on test controller board. Use Value: 50 V/V gain and 0.5 nA input bias permit accurate sub-mA measurement with 100 mΩ shunt-meeting USB-IF ±3% current tolerance. |
Use Scenario: Isolated 4–20 mA loop transmitter calibration and diagnostics in modular PLC I/O cards requiring long-term stability and EMC robustness. IC Role / Device Role / Timing Role: Low-drift shunt monitor interfacing with precision DAC and isolated sigma-delta ADC in analog front-end stage. Use Value: 80 nV/°C offset drift and 132 dB CMRR maintain <0.05% reading stability over 10-year field life despite ambient temperature cycling and 2 kV EFT noise. |
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 | 26 V max common-mode, I²C digital output, 0.1% gain error, no ENABLE pin, 700 µA IQ | Requires µC firmware integration; suited for systems needing digital telemetry over SMBus rather than analog feedback. | Select when digital interface, auto-ranging, or integrated ADC eliminate need for external µC ADC resources. |
| MAX40086AUT+T | 40 V common-mode, 50 V/V gain, 3 µV max VOS, no ENABLE, 120 µA IQ, SC70-6 package | Lacks shutdown mode; smaller 2.0 × 1.25 mm footprint but no enable control for ultra-low-power duty cycling. | Select when lowest possible offset dominates over power gating needs, and board area is more constrained than energy budget. |
Compared with INA190A2IDDFR, INA219BIDR trades analog simplicity for digital configurability and higher power, while MAX40086AUT+T offers superior offset performance but forfeits enable-controlled sleep-making INA190A2IDDFR optimal for battery-aware analog current monitoring with wide dynamic range.
Availability
INA190A2IDDFR is available at Aetrix Electronics and suitable for smartphone battery management, server PSU overcurrent protection, and USB-C PD tester applications requiring stable component supply, long-lifecycle assurance, and TI-authorized traceability.
Supply support for INA190A2IDDFR 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 INA190 product line was designed for high-accuracy, low-power current sensing in space-constrained, wide common-mode applications-including portable electronics, telecom infrastructure, and industrial automation-where microamp-level resolution and rail-to-rail operation are essential.
FAQ
What is the maximum common-mode voltage supported by the INA190A2IDDFR?
The INA190A2IDDFR 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 direct high-side sensing on 36-V bus rails without level-shifting circuitry. The specification is validated across –40°C to +125°C and applies to both IN+ and IN– pins referenced to GND.
Does the INA190A2IDDFR require external components for stable operation?
Yes-the INA190A2IDDFR requires a minimum 0.1 µF ceramic bypass capacitor between VS and GND, placed within 2 mm of the pins. No external gain-setting resistors are needed (gain is fixed at 50 V/V), and the REF pin may be tied to VS/2 via a resistor divider for bidirectional operation. Input RC filters are optional but recommended for EMI suppression.
How does the ENABLE pin function on the INA190A2IDDFR?
The ENABLE pin (pin 2) controls device power state: driving it to VS enables normal operation (48 µA IQ typ); driving it to GND disables the amplifier, reducing supply current to ≤100 nA and placing OUT in high-impedance state. The pin has 300 mV hysteresis and accepts logic levels referenced to VS or GND-no pull-up/pull-down required if hard-wired.
Can the INA190A2IDDFR measure bidirectional current, and how is it configured?
Yes-the INA190A2IDDFR supports bidirectional current sensing via the REF pin. Applying a reference voltage (e.g., 2.5 V on a 5 V supply) centers the output: positive IN+–IN– differential yields VOUT > VREF; negative differential yields VOUT < VREF. This enables detection of charge/discharge direction in battery systems without polarity-switching hardware.
What is the typical output swing capability of the INA190A2IDDFR?
The INA190A2IDDFR provides rail-to-rail output swing: minimum VOUT = GND + 1 mV and maximum VOUT = VS – 40 mV under 10 kΩ load. At VS = 1.8 V, this delivers usable 1.76 V span-critical for maximizing resolution when interfacing with low-voltage ADCs in energy-harvesting or wearables designs.
INA190A2IDDFR 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:
- 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:
- TSOT-23-8
INA190A2IDDFR FAQ
1.How can I place an order for INA190A2IDDFR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA190A2IDDFR 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 INA190A2IDDFR reliable?
The price and inventory of INA190A2IDDFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA190A2IDDFR is usually 5 days.
3.What payment methods are accepted for INA190A2IDDFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA190A2IDDFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA190A2IDDFR?
INA190A2IDDFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA190A2IDDFR 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 INA190A2IDDFR?
For technical support, including INA190A2IDDFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA190A2IDDFR requirements.
6.How does Aetrix verify that INA190A2IDDFR is sourced from the original manufacturer or authorized distributors?
All INA190A2IDDFR 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 INA190A2IDDFR meets industry standards.
7.What is the process for return or replacement of INA190A2IDDFR?
All INA190A2IDDFR units undergo pre-shipment inspection (PSI). If there is an issue with INA190A2IDDFR, 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 INA190A2IDDFR part is unused and in its original packaging.
Return procedure for INA190A2IDDFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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