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Texas Instruments INA190A2IDCKR
- Part No.:
- INA190A2IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
INA190A2IDCKR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,339
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Product details
Overview
INA190A2IDCKR 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 typical quiescent current, and enables microamp-level current measurement in high-side or low-side configurations-used in notebook PC power rail monitoring and battery test systems.
For engineers reviewing the INA190A2IDCKR datasheet, INA190A2IDCKR pinout, INA190A2IDCKR application, or INA190A2IDCKR equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for precision current sensing in space-constrained, low-power embedded systems.
Technical Context
The INA190A2IDCKR employs a capacitively coupled front-end architecture to achieve 132 dB minimum CMRR and block DC common-mode voltages-enabling accurate sensing at bus voltages up to +40 V independent of its 1.7–5.5 V supply. Its zero-drift design maintains ±15 µV max offset and 80 nV/°C max drift across –40°C to +125°C.
It supports bidirectional sensing via external REF pin biasing, delivers rail-to-rail output swing (GND +1 mV / VS –40 mV), and features 35 kHz bandwidth at 50 V/V gain. The SC70-6 package omits the ENABLE pin-unlike DDF/RSW variants-simplifying control but removing shutdown capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V fixed-converts 20 mV sense voltage to 1 V output, enabling direct ADC interfacing without additional amplification. |
| Input Offset Voltage | ±15 µV max-ensures ≤0.3% error at 5 mV sense voltage, critical for sub-10 mA current measurement accuracy. |
| Common-Mode Range | –0.2 V to +40 V-supports high-side sensing on 36-V industrial rails or low-side sensing near ground, independent of 1.8-V supply. |
| Supply Voltage | 1.7 V to 5.5 V-operates from single-cell Li-ion (3.0 V) or logic rails (1.8 V/3.3 V), reducing need for level-shifting circuitry. |
| Quiescent Current | 48 µA typ at 25°C-draws <100 µA across full temperature range, extending battery life in portable instrumentation. |
| CMRR | 132 dB min-rejects >20 V common-mode transients with <0.5 µV RTI error, essential for noisy motor drive or PSU environments. |
| Bandwidth | 37 kHz at 50 V/V-captures fast load steps (e.g., CPU burst current) with ≤1% settling in 30 µs. |
Pinout & Package
INA190A2IDCKR uses the SC70-6 (DCK) package: 2.00 mm × 1.25 mm, 0.65 mm pitch, 6-pin surface-mount. This variant excludes the ENABLE pin-pin count and function set differ from DDF (8-pin) and RSW (10-pin) versions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | REF | Bidirectional offset reference-apply mid-supply voltage (e.g., 0.9 V at 1.8 V VS) to center output for ±current sensing. |
| 2 | GND | Analog ground reference-connect directly to low-impedance PCB ground plane to minimize noise coupling into IN± inputs. |
| 3 | VS | Power supply input-decouple with 0.1 µF ceramic capacitor placed within 2 mm of pin to suppress supply ripple. |
| 4 | IN+ | Positive current-sense input-connect to high-side bus or low-side load terminal per sensing topology; 0.5 nA bias current minimizes resistor loading. |
| 5 | IN− | Negative current-sense input-pair with IN+ across shunt; differential input impedance >100 GΩ ensures negligible current division error. |
| 6 | OUT | Voltage-output node-drives ADC input or comparator; rail-to-rail swing (GND +1 mV / VS –40 mV) maximizes dynamic range at low supply. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift architecture | ±15 µV max VOS and 80 nV/°C max drift-maintains calibration stability over temperature without periodic nulling. |
| Ultra-low input bias current | 0.5 nA typ-permits use of ≥1 Ω shunts for µA-range measurements and enables RC filtering without gain/offset degradation. |
| High common-mode rejection | 132 dB min CMRR-rejects bus voltage ripple in 48 V telecom PSUs while preserving µV-level sense signal integrity. |
| Rail-to-rail output | GND +1 mV / VS –40 mV swing-delivers full 1.7 V output range at 1.8 V supply, improving ADC utilization efficiency by >20%. |
| Wide operating temperature | –40°C to +125°C-qualified for under-hood automotive modules and industrial motor controllers without derating. |
Applications
| Smartphone Battery Management | Notebook PC Power Rail Monitoring |
|---|---|
Use Scenario: Real-time charging/discharging current tracking during USB-C PD negotiation and thermal throttling. IC Role / Device Role / Timing Role: Bidirectional current-sense amplifier measuring ±500 mA through 10 mΩ shunt, referenced to 0.9 V on REF pin. Use Value: Enables coulomb counting with <0.5% full-scale error across –20°C to 60°C, supporting precise battery health estimation. |
Use Scenario: High-side sensing on 12 V VRM output to detect overcurrent faults before CPU damage occurs. IC Role / Device Role / Timing Role: Precision current monitor with 50 V/V gain feeding 12-bit ADC; responds to 5 A fault in <30 µs. Use Value: Provides 10× better sensitivity than discrete op-amp solutions, reducing false trips during GPU transient loads. |
| Merchant Server PSU Telemetry | Battery Test Equipment |
Use Scenario: Accurate load-current reporting in 48 V OR-ing diode replacement circuits for redundant power supplies. IC Role / Device Role / Timing Role: High-side current sensor on 48 V bus with –0.2 V to +40 V common-mode tolerance and 132 dB CMRR. Use Value: Eliminates need for isolated amplifiers or expensive current transformers, cutting BOM cost by 35%. |
Use Scenario: Microamp-level discharge current profiling during Li-ion formation cycling at 25°C ±0.1°C. IC Role / Device Role / Timing Role: Low-bias-current amplifier (0.5 nA) paired with 1 Ω shunt to resolve 1 µA steps with 16-bit ADC. Use Value: Achieves ±0.1% measurement linearity down to 10 µA, meeting IEC 62133 cell qualification requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA210AIDCKR | 20 V/V gain, 100 µA IQ, no zero-drift-±35 µV VOS, 0.5 µV/°C drift. | Limited to <±20 mA sensing at same shunt; higher offset degrades µA-range accuracy. | Select when cost sensitivity outweighs µA-resolution needs and ambient temperature stays <60°C. |
| MAX4008AASA+ | 50 V/V gain, 60 µA IQ, ±100 µV VOS, 1 µV/°C drift-no REF pin, unidirectional only. | Cannot support bidirectional sensing; requires external level-shifting for negative current detection. | Choose for simple high-side overload protection where directionality is irrelevant and layout space is constrained. |
Compared with INA190A2IDCKR, INA210AIDCKR trades lower cost for reduced DC accuracy and thermal stability, while MAX4008AASA+ sacrifices bidirectionality and offset performance for integrated gain-setting resistors-making INA190A2IDCKR optimal for precision, low-power, bidirectional applications demanding long-term calibration integrity.
Availability
INA190A2IDCKR is available at Aetrix Electronics and suitable for smartphone battery management, notebook PC power rail monitoring, and merchant server PSU telemetry requiring stable component supply across extended production lifecycles.
Supply support for INA190A2IDCKR 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 applications-from portable electronics to industrial power systems-emphasizing zero-drift stability, wide common-mode operation, and ultra-low input bias current.
FAQ
What is the maximum common-mode voltage the INA190A2IDCKR can handle?
The INA190A2IDCKR supports a common-mode input 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 low-side sensing near ground. The specification is validated across –40°C to +125°C and applies to both IN+ and IN− pins referenced to GND.
Does the INA190A2IDCKR include an enable pin?
No, the INA190A2IDCKR in the SC70-6 (DCK) package does not include an ENABLE pin. That feature is exclusive to the DDF (SOT-23-8) and RSW (UQFN-10) variants. The DCK version operates continuously when powered-shutdown functionality is unavailable, so system-level power gating must be implemented externally.
What is the typical quiescent current of the INA190A2IDCKR?
The INA190A2IDCKR draws 48 µA typical quiescent current at 25°C and 1.8 V supply, rising to 90 µA maximum across –40°C to +125°C. This low IQ enables multi-year battery operation in portable instrumentation, and its 1.7–5.5 V supply range supports direct connection to 1.8 V, 3.3 V, or 5 V rails without regulation.
Can the INA190A2IDCKR measure bidirectional current?
Yes, the INA190A2IDCKR supports bidirectional current sensing via its REF pin. Applying a reference voltage (e.g., VS/2 = 0.9 V at 1.8 V supply) centers the output: positive differential input yields VOUT > VREF; negative differential input yields VOUT < VREF. This enables true ±current measurement with a single-ended ADC input.
What package type is used for the INA190A2IDCKR?
The INA190A2IDCKR uses the SC70-6 (DCK) package: 2.00 mm × 1.25 mm body size, 0.65 mm pin pitch, and 6-pin surface-mount configuration. It is RoHS-compliant, moisture-sensitive level 1 (MSL-1), and optimized for automated reflow assembly in high-density PCB layouts.
INA190A2IDCKR 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:
- 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:
- SC-70-6
INA190A2IDCKR FAQ
1.How can I place an order for INA190A2IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA190A2IDCKR 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 INA190A2IDCKR reliable?
The price and inventory of INA190A2IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA190A2IDCKR is usually 5 days.
3.What payment methods are accepted for INA190A2IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA190A2IDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA190A2IDCKR?
INA190A2IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA190A2IDCKR 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 INA190A2IDCKR?
For technical support, including INA190A2IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA190A2IDCKR requirements.
6.How does Aetrix verify that INA190A2IDCKR is sourced from the original manufacturer or authorized distributors?
All INA190A2IDCKR 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 INA190A2IDCKR meets industry standards.
7.What is the process for return or replacement of INA190A2IDCKR?
All INA190A2IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with INA190A2IDCKR, 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 INA190A2IDCKR part is unused and in its original packaging.
Return procedure for INA190A2IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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