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Texas Instruments INA190A5IDDFT
- Part No.:
- INA190A5IDDFT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA190A5IDDFT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,961
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Product details
Overview
INA190A5IDDFT from Texas Instruments is a bidirectional, zero-drift, precision current-sense amplifier with 500 V/V fixed gain, ±0.4% max gain error, ±15 µV max offset voltage, and 132 dB min CMRR. It operates from 1.7 V to 5.5 V supply, supports –0.2 V to +40 V common-mode input range, and features an ENABLE pin for low-power shutdown in SOT-23-8 (DDF) package - used for microamp-level battery current monitoring in portable power management systems.
For engineers reviewing the INA190A5IDDFT datasheet, INA190A5IDDFT pinout, INA190A5IDDFT application, or INA190A5IDDFT equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in bidirectional sensing, and confirmed alternative options for high-accuracy, low-quiescent-current current measurement.
Technical Context
The INA190A5IDDFT uses a capacitively coupled front-end architecture to achieve ultra-low input bias current (0.5 nA typ) and high common-mode rejection (132 dB min), enabling accurate microamp-range current sensing independent of bus voltage. Its zero-drift design maintains ±15 µV max offset and 80 nV/°C max drift across –40°C to +125°C.
This device supports both high-side and low-side configurations via REF pin offsetting, delivers rail-to-rail output swing (GND + 1 mV min, VS – 40 mV max), and integrates ENABLE functionality to reduce quiescent current to 100 nA max in shutdown - critical for duty-cycled battery monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 500 V/V - enables high-resolution sensing of sub-millivolt shunt drops (e.g., 2 mV full-scale = 1 V output) |
| Common-mode range | –0.2 V to +40 V - supports direct connection to 3.3 V, 5 V, 12 V, or 40 V rails without level-shifting |
| Offset voltage | ±15 µV max - ensures <0.003% error at 0.5 V output, critical for light-load accuracy |
| CMRR | 132 dB min - rejects >200,000:1 common-mode noise, essential for noisy DC bus environments |
| Quiescent current | 48 µA typ (enabled), 100 nA max (disabled) - extends battery life in intermittent-monitoring applications |
| Bandwidth | 27 kHz - sufficient for fast transient detection in PSU overcurrent protection and battery charge control |
| Input bias current | 0.5 nA typ - permits use of ≥1 kΩ RC filters without gain/offset degradation or enables µA-level current measurement |
Pinout & Package
SOT-23-8 (DDF) package: 1.60 mm × 2.90 mm body, 0.65 mm pitch, exposed thermal pad (not electrically connected). Pin 1 marked by dot; pin numbering follows standard SOT-23 counterclockwise from notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: VS | Analog power supply | Accepts 1.7 V to 5.5 V; powers internal amplifiers and ENABLE logic - must be bypassed with 0.1 µF near pin |
| 2: ENABLE | Digital enable control | Active-high: drive to VS for normal operation; drive to GND to disable (output Hi-Z, IQ ≤100 nA) |
| 3: REF | Bidirectional reference input | Set to VS/2 for symmetric ±I sense range; sets output midpoint - enables true bidirectional current detection |
| 4: GND | Analog ground reference | Return path for VS and signal chain; separate from PCB power ground to minimize noise coupling |
| 5: OUT | Voltage output | Analog output = GAIN × (IN+ − IN−) + VREF; rail-to-rail swing supports 1.8 V supply operation |
| 6: IN− | Negative current-sense input | Connect to load side (high-side) or ground side (low-side) of shunt resistor - defines current direction polarity |
| 7: IN+ | Positive current-sense input | Connect to bus side (high-side) or load side (low-side) of shunt - differential pair senses I×RSENSE drop |
| 8: NC | No connect | Not internally bonded - leave floating or tie to GND/VS per layout best practice; no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | ±15 µV max offset and 80 nV/°C max drift - maintains accuracy across industrial temperature range without calibration |
| Capacitively coupled input | 0.5 nA typ input bias current - enables µA-level current measurement and stable RC filtering without error penalty |
| Bidirectional sensing | REF pin offsetting allows single-supply detection of forward/reverse current flow - eliminates need for dual supplies |
| High CMRR | 132 dB min - rejects interference from switching regulators, motor drives, or RF noise on high-voltage buses |
| Enable-controlled shutdown | 100 nA max supply current when disabled - reduces system power by >99% during idle periods in battery-powered devices |
Applications
| Battery Fuel Gauging | Server PSU Current Monitoring |
|---|---|
|
Use Scenario: Real-time charging/discharging current tracking in lithium-ion battery packs for notebook PCs and tablets. IC Role / Device Role / Timing Role: Precision current-sense amplifier measuring µA–A range across low-value shunt, interfacing directly to MCU ADC. Use Value: Enables <0.5% SOC error over lifetime via ultra-low drift and microamp sensitivity - critical for safety and runtime estimation. |
Use Scenario: High-accuracy output current monitoring in 12 V/48 V server power supplies for OCP and efficiency reporting. IC Role / Device Role / Timing Role: High-side current sensor on primary or secondary rail, rejecting 40 V bus transients while delivering linear analog output. Use Value: Delivers 132 dB CMRR and ±0.4% gain error - ensures reliable overcurrent trip without false triggers during load transients. |
| USB-C Power Delivery | Industrial Motor Driver Feedback |
|
Use Scenario: Bidirectional current sensing in USB-C PD sink/source ports to enforce power contract limits and detect faults. IC Role / Device Role / Timing Role: REF-biased current amplifier detecting ±3 A flow with 500 V/V gain, feeding fast-response protection logic. Use Value: 27 kHz bandwidth and 30 µs settling time support real-time fault response within USB-PD timing constraints. |
Use Scenario: Low-side phase current sensing in BLDC motor drivers for closed-loop torque control and stall detection. IC Role / Device Role / Timing Role: High-precision shunt amplifier with rail-to-rail output, driving isolated sigma-delta ADC inputs. Use Value: GND + 1 mV output swing maximizes dynamic range on 3.3 V ADC - improves current resolution by 12 bits effective. |
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 ENABLE pin; 26 V max common-mode; 0.1% gain error | Requires MCU I²C interface; lacks analog output flexibility and ultra-low bias current (35 nA vs 0.5 nA) | Choose for digital BOM simplification where µA-level sensing isn't required and bus voltage ≤26 V. |
| MAX4008AASA+ | 500 V/V gain, 125°C rating, 100 nA max IQ shutdown; no REF pin - unidirectional only; 120 dB CMRR | Cannot support true bidirectional sensing; lower CMRR increases error in noisy industrial environments | Choose for cost-sensitive, unidirectional high-temp applications where REF-based offset isn't needed. |
Compared with INA219BIDR and MAX4008AASA+, the INA190A5IDDFT uniquely combines 500 V/V gain, bidirectional capability via REF, 0.5 nA input bias, and 40 V common-mode range - making it the only option for µA-accurate, high-voltage, analog-output current sensing in space-constrained SOT-23 layouts.
Availability
INA190A5IDDFT is available at Aetrix Electronics and suitable for battery fuel gauging, server PSU current monitoring, and USB-C power delivery applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for INA190A5IDDFT 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 portable, industrial, and computing systems - emphasizing microamp sensitivity, wide common-mode range, and robust performance across temperature and supply variations.
FAQ
What is the maximum common-mode voltage supported by the INA190A5IDDFT?
The INA190A5IDDFT 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 connection to 12 V, 24 V, or 40 V power rails in high-side sensing configurations without external level-shifting circuitry - a key advantage over conventional op-amp-based solutions. The specification is validated across –40°C to +125°C.
Does the INA190A5IDDFT support bidirectional current sensing, and how is it implemented?
Yes, the INA190A5IDDFT supports true bidirectional current sensing via its REF pin. Applying a reference voltage (e.g., VS/2) to REF centers the output voltage; positive differential input (IN+ > IN−) produces output above VREF, while negative differential input produces output below VREF. This enables single-supply detection of charge/discharge current in battery systems without polarity-reversal circuitry - a feature confirmed in TI's SBOS863D datasheet Section 7.3.4.
What is the typical input bias current of the INA190A5IDDFT, and why does it matter?
The INA190A5IDDFT has a typical input bias current of 0.5 nA, enabled by its capacitively coupled input stage. This ultra-low value allows accurate measurement of currents down to the microamp range using higher-value sense resistors, minimizes error from input filtering (RC networks), and avoids loading effects on high-impedance shunt paths - critical for precision battery monitoring and low-power IoT sensor nodes.
How does the ENABLE pin function on the INA190A5IDDFT, and what is its impact on power consumption?
The ENABLE pin on the INA190A5IDDFT is active-high: driving it to VS enables normal operation (48 µA typ quiescent current), while driving it to GND places the device in shutdown mode with ≤100 nA supply current and high-impedance output. This feature is exclusive to DDF (SOT-23-8) and RSW (UQFN-10) packages - explicitly documented in TI's SBOS863D datasheet Section 5 and Figure 5 - enabling aggressive power cycling in battery-powered applications.
What are the key accuracy specifications of the INA190A5IDDFT at 25°C?
At 25°C, the INA190A5IDDFT delivers ±15 µV maximum offset voltage, ±0.4% maximum gain error, 132 dB minimum CMRR, and 7 ppm/°C maximum gain drift. These values are specified in TI's SBOS863D Electrical Characteristics table (Section 6.5) and ensure <0.01% total error in typical 12-bit ADC interfacing scenarios - especially valuable for closed-loop power optimization and safety-critical overcurrent detection.
INA190A5IDDFT 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:
- 27 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
INA190A5IDDFT FAQ
1.How can I place an order for INA190A5IDDFT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA190A5IDDFT 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 INA190A5IDDFT reliable?
The price and inventory of INA190A5IDDFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA190A5IDDFT is usually 5 days.
3.What payment methods are accepted for INA190A5IDDFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA190A5IDDFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA190A5IDDFT?
INA190A5IDDFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA190A5IDDFT 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 INA190A5IDDFT?
For technical support, including INA190A5IDDFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA190A5IDDFT requirements.
6.How does Aetrix verify that INA190A5IDDFT is sourced from the original manufacturer or authorized distributors?
All INA190A5IDDFT 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 INA190A5IDDFT meets industry standards.
7.What is the process for return or replacement of INA190A5IDDFT?
All INA190A5IDDFT units undergo pre-shipment inspection (PSI). If there is an issue with INA190A5IDDFT, 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 INA190A5IDDFT part is unused and in its original packaging.
Return procedure for INA190A5IDDFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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