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Texas Instruments INA190A1IDCKT
- Part No.:
- INA190A1IDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
INA190A1IDCKT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,687
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Product details
Overview
INA190A1IDCKT from Texas Instruments is a bidirectional, zero-drift, precision current-sense amplifier with 25 V/V fixed gain, ±15 µV max offset voltage, 132 dB min CMRR, and 1.7–5.5 V supply range. It operates from –0.2 V to +40 V common-mode voltage independent of supply, supports high-side/low-side sensing, and enables microamp-level current measurement in battery-powered systems.
For engineers reviewing the INA190A1IDCKT datasheet, INA190A1IDCKT pinout, INA190A1IDCKT application, or INA190A1IDCKT equivalent, this page delivers verified technical context, real-world design meaning for key specs, SC70-6 package mapping, and validated alternatives for portable power monitoring, overcurrent protection, and bidirectional load current feedback circuits.
Technical Context
The INA190A1IDCKT uses a capacitively coupled front-end architecture to achieve ultra-low input bias current (0.5 nA typ) and reject DC common-mode voltage shifts-enabling stable operation across –0.2 V to +40 V bus voltages even with 1.7 V supply. Its zero-drift core ensures <80 nV/°C offset drift and ±0.2% gain error over –40°C to +125°C.
In normal mode, it delivers 45 kHz bandwidth (A1 gain), rail-to-rail output swing (GND +1 mV / VS –40 mV), and 50 µA typical quiescent current. The ENABLE pin is not present in the DCK (SC70-6) package-this variant operates continuously when powered, eliminating enable control but simplifying layout for always-on monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 25 V/V - sets full-scale output at ±40 mV sense voltage; enables 100 µA resolution with 1 Ω shunt at 1.8 V supply |
| Offset Voltage (max) | ±15 µV - limits minimum measurable current to ~15 µA with 1 Ω shunt, critical for low-power sleep-state monitoring |
| Common-Mode Range | –0.2 V to +40 V - supports direct high-side sensing on 36 V industrial rails or USB PD lines without level-shifting |
| Supply Voltage | 1.7 V to 5.5 V - interoperable with Li-ion, 3.3 V logic, and 5 V legacy systems; enables single-supply operation in space-constrained PCBs |
| CMRR (min) | 132 dB - rejects >20 V ripple on 40 V bus while preserving µV-level differential signals; essential for noisy motor or PSU environments |
| Quiescent Current (typ) | 50 µA - draws only 90 µW at 1.8 V, suitable for multi-year battery life in IoT sensor nodes with periodic current sampling |
| Bandwidth | 45 kHz - supports fast transient detection (e.g., short-circuit response in <30 µs) in DC-DC converter output monitoring |
Pinout & Package
INA190A1IDCKT is housed in a 6-pin SC70 package (2.00 mm × 1.25 mm body), optimized for high-density portable designs. The DCK variant omits the ENABLE pin-pin count and footprint differ from DDF (SOT-23-8) and RSW (UQFN-10) versions.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | REF | Reference input for bidirectional sensing; applying 0.9 V enables ±36 mA measurement range with 1 Ω shunt and 25× gain |
| 2 | GND | Analog ground reference; must be star-connected to minimize noise coupling into high-impedance IN+ and IN– inputs |
| 3 | VS | Single power supply input (1.7–5.5 V); bypass with 0.1 µF ceramic capacitor near pin to suppress supply noise |
| 4 | IN+ | Positive current-sense input; connect to bus side (high-side) or load side (low-side) of shunt resistor per topology |
| 5 | IN– | Negative current-sense input; connect to load side (high-side) or ground side (low-side); matched impedance critical for CMRR |
| 6 | OUT | Voltage-output node (25×(IN+−IN–) + VREF); drives ADC input or comparator with rail-to-rail swing up to VS –40 mV |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing | Enabled via external REF voltage; allows single device to monitor charge/discharge current in battery management without polarity switching |
| Zero-drift architecture | Delivers <80 nV/°C offset drift-maintains calibration stability across automotive (-40°C to +125°C) and industrial temperature cycles |
| Ultra-low input bias current | 0.5 nA typ permits use of high-value shunts (e.g., 100 Ω) for sub-µA current detection in leakage testing or ultra-low-power standby modes |
| High common-mode rejection | 132 dB min CMRR ensures <0.1 µV error from 10 V bus ripple-critical for accurate current reading in switch-mode power supplies |
| Rail-to-rail output | Swings to GND +1 mV and VS –40 mV-maximizes dynamic range on 1.8 V supplies, enabling full 12-bit ADC utilization without gain staging |
Applications
| Smartphone Battery Management | Industrial 24 V PLC I/O Module |
|---|---|
Use Scenario: Real-time monitoring of battery charge/discharge current during fast charging and system sleep states. IC Role / Device Role / Timing Role: Bidirectional current-sense amplifier converting shunt voltage to precise analog output for MCU ADC sampling. Use Value: Enables µA-level sleep-current validation and Coulomb counting accuracy within ±0.5% using 10 mΩ shunt and internal 25× gain. |
Use Scenario: Overcurrent protection and load diagnostics in 24 V digital output channels driving solenoids or relays. IC Role / Device Role / Timing Role: High-side current monitor interfacing between 24 V bus and 3.3 V controller, rejecting bus transients. Use Value: Detects 2 A fault current in <30 µs via 0.1 Ω shunt and 25× gain, triggering shutdown before MOSFET thermal damage. |
| USB-C Power Delivery Analyzer | Medical Infusion Pump Motor Control |
Use Scenario: Precision measurement of forward/reverse current on USB-C CC and VBUS lines during power role swaps. IC Role / Device Role / Timing Role: Dual-role current sensor providing bidirectional analog output referenced to mid-supply for differential ADC input. Use Value: Resolves ±10 mA current changes at 20 V bus with <1% total error-validating PD contract compliance under EMI-heavy lab conditions. |
Use Scenario: Closed-loop motor current regulation in battery-powered infusion pumps requiring silent, low-EMI operation. IC Role / Device Role / Timing Role: Low-noise, low-drift current amplifier feeding PID controller; operates from same 3.3 V rail as MCU. Use Value: Maintains ±0.2% current regulation accuracy across 0–500 mA range despite 10°C/h ambient shifts-ensuring precise fluid delivery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA210AIDCKT | 20 V/V gain, 100 µV max offset, no zero-drift architecture, 60 µA IQ | Lacks bidirectional capability (no REF pin); limited to unidirectional high-side sensing | Select for cost-sensitive, unidirectional applications where ±100 µV offset is acceptable and REF-based centering is unnecessary |
| MAX40010TAUT+T | 20 V/V gain, 50 µV max offset, 1.7–5.5 V supply, no ENABLE, SC70-6 | Higher 120 dB CMRR, no zero-drift-drift dominates error above 60°C; lacks REF pin for true bidirectionality | Prefer for narrow-temp commercial apps needing lower cost and proven reliability, but avoid in automotive or wide-temp bidirectional use |
Compared with INA190A1IDCKT, INA210AIDCKT trades bidirectionality and drift performance for lower unit cost, while MAX40010TAUT+T offers tighter initial offset but inferior long-term stability and no REF-based centering-making INA190A1IDCKT the only choice for precision bidirectional monitoring across extended temperature ranges.
Availability
INA190A1IDCKT is available at Aetrix Electronics and suitable for smartphone battery management, industrial PLC I/O modules, USB-C power analyzers, and medical infusion pump motor control requiring stable component supply across automotive, industrial, and medical production programs.
Supply support for INA190A1IDCKT 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 specifically for high-accuracy, low-power current sensing in space-constrained, battery-operated, and high-common-mode industrial systems-emphasizing zero-drift stability, microamp input bias, and wide supply flexibility.
FAQ
What is the maximum common-mode voltage supported by the INA190A1IDCKT?
The INA190A1IDCKT supports a common-mode input voltage range of –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 industrial buses or 40 V automotive systems without external level-shifting circuitry. The specification is guaranteed across –40°C to +125°C and applies to both IN+ and IN– pins simultaneously.
Does the INA190A1IDCKT include an ENABLE pin?
No, the INA190A1IDCKT in the SC70-6 (DCK) package does not include an ENABLE pin. That feature is only available in the DDF (SOT-23-8) and RSW (UQFN-10) variants. The INA190A1IDCKT operates continuously when powered-ideal for always-on current monitoring where enable control is unnecessary or handled externally.
What is the typical quiescent current of the INA190A1IDCKT at 25°C?
The INA190A1IDCKT draws 50 µA typical quiescent current at 25°C and 1.8 V supply, rising to 90 µA maximum across –40°C to +125°C. This ultra-low IQ enables multi-year battery life in IoT sensors and portable devices performing periodic current sampling, with power consumption scaling linearly with supply voltage.
How does the REF pin enable bidirectional current sensing in the INA190A1IDCKT?
The REF pin on the INA190A1IDCKT accepts an external voltage (typically VS/2) to establish a DC output center point. When IN+ > IN–, OUT = 25×(IN+−IN–) + VREF; when IN+ < IN–, OUT falls below VREF. This allows a single-ended ADC to resolve both charge and discharge currents-e.g., 0.9 V REF yields ±36 mA range with 1 Ω shunt and 25× gain.
What package type is used for the INA190A1IDCKT, and what are its dimensions?
The INA190A1IDCKT uses the SC70-6 (DCK) package with nominal body dimensions of 2.00 mm × 1.25 mm and 0.95 mm height. Its compact footprint supports high-density layouts in smartphones, wearables, and portable test equipment, and it is compatible with standard reflow soldering profiles per JEDEC J-STD-020.
INA190A1IDCKT 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:
- 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:
- SC-70-6
INA190A1IDCKT FAQ
1.How can I place an order for INA190A1IDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA190A1IDCKT 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 INA190A1IDCKT reliable?
The price and inventory of INA190A1IDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA190A1IDCKT is usually 5 days.
3.What payment methods are accepted for INA190A1IDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA190A1IDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA190A1IDCKT?
INA190A1IDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA190A1IDCKT 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 INA190A1IDCKT?
For technical support, including INA190A1IDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA190A1IDCKT requirements.
6.How does Aetrix verify that INA190A1IDCKT is sourced from the original manufacturer or authorized distributors?
All INA190A1IDCKT 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 INA190A1IDCKT meets industry standards.
7.What is the process for return or replacement of INA190A1IDCKT?
All INA190A1IDCKT units undergo pre-shipment inspection (PSI). If there is an issue with INA190A1IDCKT, 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 INA190A1IDCKT part is unused and in its original packaging.
Return procedure for INA190A1IDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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