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Texas Instruments INA190A5IDCKR
- Part No.:
- INA190A5IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
INA190A5IDCKR.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,315
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Product details
Overview
INA190A5IDCKR from Texas Instruments is a bidirectional, zero-drift, precision current-sense amplifier with 500 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 rail-to-rail output swing - enabling accurate microamp-level current measurement in high-side or low-side configurations for battery-powered systems.
For engineers reviewing the INA190A5IDCKR datasheet, INA190A5IDCKR pinout, INA190A5IDCKR application, or INA190A5IDCKR equivalent, this device is selected when ultra-low input bias current (0.5 nA typ), sub-0.4% gain error, and enable-controlled shutdown (<100 nA) are required for precision power monitoring in space-constrained SC70 layouts.
Technical Context
The INA190A5IDCKR uses a capacitively coupled front-end architecture to achieve high common-mode rejection (132–150 dB) independent of supply voltage, allowing operation with bus voltages up to +40 V while powered from as low as 1.7 V. Its zero-drift design maintains offset stability across temperature (80 nV/°C max drift).
It implements bidirectional sensing via external REF pin biasing, supports both high-side and low-side shunt placement, and features an ENABLE input (available in DCK package per TI's revision history) that places OUT in high-impedance state and reduces quiescent current to ≤100 nA when driven low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 500 V/V - enables detection of 2 mV sense voltage for 1 A load with 2 mV/A resolution at full scale. |
| Offset voltage (max) | ±15 µV - ensures <0.03% error at 50 mV sense voltage, critical for low-current accuracy. |
| 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. |
| Input bias current (typ) | 0.5 nA - permits use of ≥1 kΩ sense resistors for µA-range current measurement with minimal error. |
| Quiescent current (typ) | 48 µA - extends battery life in portable devices; drops to ≤100 nA in shutdown mode. |
| CMRR (min) | 132 dB - rejects >20 V common-mode transients with <1 µV offset shift, essential for noisy power rails. |
| Bandwidth | 27 kHz - sufficient for DC–10 kHz current monitoring in PSU, BMS, and charger feedback loops. |
Pinout & Package
INA190A5IDCKR is packaged in a 6-pin SC70 (DCK) with 2.00 mm × 1.25 mm body size. Pin 1 is REF, Pin 2 is GND, Pin 3 is VS, Pin 4 is IN+, Pin 5 is IN−, and Pin 6 is OUT. The ENABLE function is not present in the DCK package per TI SBOS863D Rev D - only available in DDF (SOT-23-8) and RSW (UQFN-10) variants.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| REF (Pin 1) | Analog reference input | Sets output zero-current baseline; applying VS/2 enables symmetric ±ILOAD measurement. |
| GND (Pin 2) | Analog ground reference | Return path for internal circuitry; must be low-impedance and separated from power ground if noise-sensitive. |
| VS (Pin 3) | Supply voltage input | Accepts 1.7–5.5 V; powers internal amplifiers and bias networks; bypass capacitor required. |
| IN+ (Pin 4) | Positive current-sense input | Connects to bus side of shunt in high-side config; load side in low-side config. |
| IN− (Pin 5) | Negative current-sense input | Connects to load side of shunt in high-side config; ground side in low-side config. |
| OUT (Pin 6) | Voltage-output terminal | Provides VREF + 500 × (VIN+ − VIN−); rail-to-rail swing supports 1.8 V logic interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing | Enabled by externally applied REF voltage - allows single-supply measurement of charging/discharging currents in battery systems. |
| Zero-drift architecture | 80 nV/°C max offset drift - maintains calibration over –40°C to +125°C without periodic nulling. |
| Ultra-low input bias current | 0.5 nA typ - eliminates significant error from shunt resistor self-heating and enables µA-level current detection. |
| Rail-to-rail output | VOUT swings to GND +1 mV and VS –40 mV - maximizes dynamic range on 1.8 V supplies. |
| High CMRR | 132 dB min - suppresses interference from switching regulators and motor drivers in shared PCB ground planes. |
Applications
| Smartphone Battery Management | Server PSU Current Monitoring |
|---|---|
|
Use Scenario: Real-time charge/discharge current tracking during fast charging and standby modes. IC Role / Device Role / Timing Role: Precision current-sense amplifier converting shunt voltage to analog output for MCU ADC sampling. Use Value: 0.5 nA input bias enables accurate µA sleep-current measurement; 500 V/V gain resolves 2 µA steps with 100 mΩ shunt. |
Use Scenario: High-side current monitoring on 12 V and 48 V output rails of multi-phase server PSUs. IC Role / Device Role / Timing Role: Isolated current-sense front-end feeding isolated ADC or digital controller. Use Value: –0.2 V to +40 V common-mode range allows direct connection to 48 V rail; 132 dB CMRR rejects PWM noise. |
| Notebook PC Power Optimization | Consumer Battery Charger Feedback |
|
Use Scenario: Dynamic load current profiling across CPU, GPU, and display subsystems to optimize power delivery. IC Role / Device Role / Timing Role: Analog current monitor in system power management IC (PMIC) signal chain. Use Value: 48 µA quiescent current minimizes overhead in always-on monitoring paths; SC70 footprint saves board area. |
Use Scenario: Closed-loop current regulation in USB PD and Qi wireless chargers during constant-current phase. IC Role / Device Role / Timing Role: High-accuracy shunt amplifier providing feedback to charge controller PWM loop. Use Value: ±15 µV offset ensures <0.015% gain-independent error at 1 A; 27 kHz bandwidth supports 10 kHz control loop stability. |
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 output, integrated 12-bit ADC, 1% gain error, no ENABLE pin, 26 V max common-mode. | Digital-output systems requiring host MCU I²C interface instead of analog voltage output. | Select when system already uses I²C infrastructure and absolute accuracy >0.2% is acceptable. |
| MAX4008AASA+ | 200 V/V gain, 10 µV max offset, 100 dB CMRR, 2.7–5.5 V supply, SO-8 package. | Higher-power industrial monitors where SO-8 thermal performance outweighs SC70 size advantage. | Select when higher CMRR margin is unnecessary and larger package simplifies layout or thermal management. |
Compared with INA190A5IDCKR, INA219BIDR trades analog precision for digital integration and ease of use, while MAX4008AASA+ offers lower cost and simpler layout at the expense of 32 dB lower CMRR and absence of zero-drift stability - making INA190A5IDCKR optimal for µA-resolution, wide common-mode, and thermally stable designs.
Availability
INA190A5IDCKR is available at Aetrix Electronics and suitable for smartphone battery management, server PSU current monitoring, notebook PC power optimization, and consumer battery charger feedback requiring stable component supply across production lifecycles.
Supply support for INA190A5IDCKR 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 company specializing in analog and embedded processing technologies, with leadership in precision signal chain and power management solutions.
The INA190 product line was designed for high-accuracy, low-power current sensing in space-constrained, battery-sensitive applications - delivering zero-drift performance and wide common-mode operation without external calibration.
FAQ
What is the maximum common-mode voltage supported by the INA190A5IDCKR?
The INA190A5IDCKR 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 high-voltage rails such as 12 V, 24 V, or 40 V buses without external level-shifting circuitry - a key capability confirmed in TI SBOS863D Section 6.3 and Figure 34.
Does the INA190A5IDCKR include an ENABLE pin?
No, the INA190A5IDCKR does not include an ENABLE pin. Per TI SBOS863D Revision D, the ENABLE function is only available in the DDF (SOT-23-8) and RSW (UQFN-10) packages - not in the DCK (SC70-6) package used by INA190A5IDCKR. All six pins on INA190A5IDCKR are functional: REF, GND, VS, IN+, IN−, and OUT.
What is the typical input bias current of the INA190A5IDCKR?
The typical input bias current of the INA190A5IDCKR is 0.5 nA, with a maximum of 3 nA over temperature, as specified in TI SBOS863D Section 6.5 Electrical Characteristics. This ultra-low value enables accurate measurement of microamp-level currents using high-value sense resistors, and minimizes error from shunt self-heating.
Can the INA190A5IDCKR be used for bidirectional current sensing?
Yes, the INA190A5IDCKR supports bidirectional current sensing by applying a DC bias voltage to the REF pin - typically VS/2 - which centers the output voltage. A positive differential input (IN+ > IN−) produces VOUT > VREF, while negative differential input yields VOUT < VREF. This functionality is explicitly described in Section 7.3.4 and Equation 1 of the datasheet.
What is the gain error specification for the INA190A5IDCKR?
The INA190A5IDCKR has a gain error specification of ±0.4% maximum, as stated in TI SBOS863D Section 6.5 under "Gain error" for A5 devices. This applies across the full output range (0.1 V to VS – 0.1 V) and includes drift effects over temperature - a critical parameter for high-accuracy current measurement systems requiring <0.5% total error budget.
INA190A5IDCKR 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:
- 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:
- SC-70-6
INA190A5IDCKR FAQ
1.How can I place an order for INA190A5IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for INA190A5IDCKR 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 INA190A5IDCKR reliable?
The price and inventory of INA190A5IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA190A5IDCKR is usually 5 days.
3.What payment methods are accepted for INA190A5IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA190A5IDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA190A5IDCKR?
INA190A5IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA190A5IDCKR 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 INA190A5IDCKR?
For technical support, including INA190A5IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA190A5IDCKR requirements.
6.How does Aetrix verify that INA190A5IDCKR is sourced from the original manufacturer or authorized distributors?
All INA190A5IDCKR 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 INA190A5IDCKR meets industry standards.
7.What is the process for return or replacement of INA190A5IDCKR?
All INA190A5IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with INA190A5IDCKR, 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 INA190A5IDCKR part is unused and in its original packaging.
Return procedure for INA190A5IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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