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Texas Instruments INA190A3IDCKT
- Part No.:
- INA190A3IDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
INA190A3IDCKT.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,370
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Product details
Overview
INA190A3IDCKT from Texas Instruments is a bidirectional, zero-drift, precision current-sense amplifier with 100 V/V fixed gain, ±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 delivers 35 kHz bandwidth. It enables microamp-level current measurement in high-side or low-side configurations for battery-powered systems.
For engineers reviewing the INA190A3IDCKT datasheet, INA190A3IDCKT pinout, INA190A3IDCKT application, or INA190A3IDCKT equivalent, key selection criteria include its ultra-low 0.5 nA typical input bias current, 50 µA typical quiescent current, enable-controlled shutdown (100 nA max), rail-to-rail output swing (GND +1 mV / VS –40 mV), and SC70-6 package compatibility with space-constrained PCB layouts.
Technical Context
The INA190A3IDCKT uses a capacitively coupled front-end architecture to achieve 132 dB minimum common-mode rejection and isolate DC common-mode voltages from downstream stages. Its zero-drift design maintains ±15 µV max offset and 80 nV/°C max drift across –40°C to +125°C, enabling accurate low-current sensing even at light loads.
This variant implements fixed 100 V/V gain (A3 option) with ±0.3% max gain error and 7 ppm/°C max gain drift. It features bidirectional capability via external REF pin biasing and enters high-impedance output state during ENABLE-driven shutdown - a function available only in DDF and RSW packages, not in the SC70-6 (DCK) package of INA190A3IDCKT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 V/V fixed - sets output voltage = 100 × (IN+ − IN−) + VREF; enables precise scaling for 10-mV full-scale shunt signals. |
| Input Offset Voltage | ±15 µV max - ensures ≤0.15% error at 10-mV sense voltage; critical for sub-100-µA current resolution. |
| Common-Mode Range | –0.2 V to +40 V - supports direct high-side sensing on 36-V bus rails without level-shifting, independent of 1.7–5.5-V supply. |
| Supply Current (Enabled) | 65 µA max - allows continuous monitoring in always-on subsystems with <1 µW power overhead at 1.8 V. |
| Bandwidth | 35 kHz - sufficient for DC–10-kHz current transients in battery protection, PSU telemetry, and motor phase monitoring. |
| Input Bias Current | 0.5 nA typ - permits use of ≥10-kΩ RC filters without gain/offset degradation; enables stable µA-range measurements. |
| CMRR | 132 dB min - rejects >20-V common-mode noise (e.g., switching ripple) to preserve <1-µV RTI error floor. |
Pinout & Package
INA190A3IDCKT is packaged in a 6-pin SC70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for high-density portable PCBs. The ENABLE pin is not implemented in this package variant.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | REF | Reference input for bidirectional operation; sets zero-current output level (e.g., 0.9 V → ±0.9 V output swing around midpoint). |
| 2 | GND | Analog ground reference; must be star-connected to minimize PSRR degradation and offset instability. |
| 3 | VS | Single 1.7–5.5 V analog supply; powers internal amplifiers and bias circuitry; bypass with 0.1-µF ceramic capacitor. |
| 4 | IN+ | Positive current-sense input; connects to bus side (high-side) or load side (low-side) of shunt resistor. |
| 5 | IN− | Negative current-sense input; connects to load side (high-side) or ground side (low-side) of shunt resistor. |
| 6 | OUT | Voltage-output node; delivers 100×(IN+−IN−)+VREF; drives 10-kΩ loads with GND+1 mV to VS−40 mV swing. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing | Enabled by externally applied REF voltage; supports both charge/discharge current monitoring in battery packs. |
| Zero-drift architecture | 80 nV/°C max offset drift - maintains calibration stability over temperature without periodic nulling. |
| Rail-to-rail output | GND+1 mV / VS−40 mV swing - maximizes dynamic range on 1.8-V supplies (e.g., 1.799 V usable span). |
| Ultra-low input bias | 0.5 nA typ - eliminates shunt resistor self-heating error and enables >1-MΩ filter networks for EMI suppression. |
| High CMRR | 132 dB min - rejects bus-voltage transients and switching noise in DC/DC converter feedback paths. |
Applications
| Smartphone Battery Management | Server PSU Telemetry |
|---|---|
|
Use Scenario: Real-time monitoring of charging/discharging current in Li-ion battery packs with 3.0–4.4 V operating range. IC Role / Device Role / Timing Role: Current-sense amplifier converting mV-level shunt voltage into scalable analog output for ADC sampling. Use Value: 0.5 nA input bias enables µA-resolution current tracking; ±15 µV offset ensures <0.1% SoC error at end-of-charge. |
Use Scenario: High-accuracy load current measurement in 12-V/48-V server power supplies for thermal derating and fault logging. IC Role / Device Role / Timing Role: High-side current monitor interfacing with isolated ADC or microcontroller via REF-biased output. Use Value: 40-V common-mode range allows direct connection to primary-side bus; 132 dB CMRR suppresses PWM noise from synchronous rectifiers. |
| USB-C PD Power Delivery | Industrial IoT Sensor Node |
|
Use Scenario: Bidirectional current sensing in USB-C power delivery controllers to enforce source/sink compliance and detect cable faults. IC Role / Device Role / Timing Role: Precision analog front-end providing direction-aware current signal to PD policy engine. Use Value: REF pin enables true bidirectional output (e.g., 1.65 V ±1.65 V); 35 kHz bandwidth captures fast CC line transitions during contract negotiation. |
Use Scenario: Low-power current monitoring in battery-operated wireless sensor nodes requiring multi-year runtime. IC Role / Device Role / Timing Role: Always-on current monitor feeding sleep/wake decisions and battery health analytics. Use Value: 50 µA quiescent current extends 2500-mAh coin cell life to >5 years; SC70-6 footprint minimizes board area in compact enclosures. |
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 shunt; no REF pin; 26 V max common-mode; 1000-ppm/°C gain drift. | Requires microcontroller I²C interface; lacks analog output flexibility; unsuitable for analog control loops or high-CM environments. | Select when digital BOM consolidation and built-in calibration outweigh need for analog output or 40-V CM range. |
| MAX4008BAUT+T | 100 V/V gain, 2.7–5.5 V supply, 120 dB CMRR, 200 nA input bias, SOT23-6 package; no zero-drift architecture. | Higher offset (±300 µV) limits µA sensing; lower CMRR reduces noise immunity in noisy industrial settings. | Select for cost-sensitive, non-critical applications where 0.3% gain error and 300-µV offset are acceptable. |
Compared with INA190A3IDCKT, INA219BIDR trades analog flexibility and 40-V CM capability for digital integration, while MAX4008BAUT+T sacrifices zero-drift stability and CMRR for lower unit cost - making INA190A3IDCKT optimal for precision, wide-CM, low-power analog current sensing.
Availability
INA190A3IDCKT is available at Aetrix Electronics and suitable for smartphone battery management, server PSU telemetry, USB-C PD power delivery, and industrial IoT sensor node designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for INA190A3IDCKT 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- and energy-constrained applications including portable electronics, data center power systems, and battery-powered industrial devices.
FAQ
What is the maximum common-mode voltage supported by the INA190A3IDCKT?
The INA190A3IDCKT 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 bus rails without external level-shifting circuitry. The specification is validated across the full –40°C to +125°C operating temperature range and applies to both IN+ and IN− pins referenced to GND.
Does the INA190A3IDCKT have an ENABLE pin?
No, the INA190A3IDCKT does not include an ENABLE pin. That feature is available only in the DDF (SOT-23-8) and RSW (UQFN-10) package variants of the INA190 family. The DCK (SC70-6) package used for INA190A3IDCKT omits the ENABLE function entirely - the device remains continuously enabled when powered within its recommended operating conditions.
What is the typical quiescent current of the INA190A3IDCKT?
The INA190A3IDCKT draws 48 µA typical quiescent current at 25°C and 1.8 V supply, with a maximum of 65 µA across temperature and voltage extremes. This low IQ enables continuous current monitoring in battery-powered systems without significant runtime impact - for example, adding only ~0.5 µW of overhead at 1.8 V.
Can the INA190A3IDCKT measure bidirectional current?
Yes, the INA190A3IDCKT supports bidirectional current sensing via its REF pin. Applying a mid-supply voltage (e.g., VS/2 = 0.9 V at 1.8 V) to REF centers the output: positive differential input (IN+ > IN−) yields VOUT > VREF, while negative differential input yields VOUT < VREF. This enables single-supply detection of charge/discharge direction in battery applications.
What is the gain accuracy specification for the INA190A3IDCKT?
The INA190A3IDCKT has a gain error of ±0.3% maximum across temperature and supply voltage, with typical performance tighter than ±0.06%. This 100 V/V fixed gain is laser-trimmed at wafer test and remains stable with 7 ppm/°C max drift - ensuring consistent scaling from µA to ampere-level currents without recalibration.
INA190A3IDCKT 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:
- Obsolete
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.3V/µs
- Gain Bandwidth Product:
- 35 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
INA190A3IDCKT FAQ
1.How can I place an order for INA190A3IDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for INA190A3IDCKT 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 INA190A3IDCKT reliable?
The price and inventory of INA190A3IDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA190A3IDCKT is usually 5 days.
3.What payment methods are accepted for INA190A3IDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA190A3IDCKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA190A3IDCKT?
INA190A3IDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA190A3IDCKT 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 INA190A3IDCKT?
For technical support, including INA190A3IDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA190A3IDCKT requirements.
6.How does Aetrix verify that INA190A3IDCKT is sourced from the original manufacturer or authorized distributors?
All INA190A3IDCKT 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 INA190A3IDCKT meets industry standards.
7.What is the process for return or replacement of INA190A3IDCKT?
All INA190A3IDCKT units undergo pre-shipment inspection (PSI). If there is an issue with INA190A3IDCKT, 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 INA190A3IDCKT part is unused and in its original packaging.
Return procedure for INA190A3IDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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