Overview
The INA190A1QDCKRQ1, produced by Texas Instruments, is an automotive-grade, low-power, voltage-output current-shunt monitor. This device is designed for precise current sensing in various automotive applications. It operates with a single power supply voltage ranging from 1.7 V to 5.5 V and is capable of sensing currents across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage. The INA190-Q1 series, including the INA190A1QDCKRQ1, features low input bias current and zero-drift architecture, enabling accurate current measurements even at the microamp range.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VS) | 1.7 to 5.5 | V |
| Common-Mode Voltage Range | –0.2 to +40 | V |
| Gain Options | 25 V/V, 50 V/V, 100 V/V, 200 V/V, 500 V/V | |
| Input Bias Current | 0.5 nA (typ) | nA |
| Offset Voltage | < 15 µV | µV |
| Quiescent Current (IQ) | 48 µA (typ), 10 nA (disabled) | µA, nA |
| Operating Temperature Range | –40°C to +125°C | °C |
| Package Options | SC70 (6-pin), SOT-23 (8-pin) |
Key Features
- Low Input Bias Current: Allows for accurate current measurements using larger current-sense resistors.
- Zero-Drift Architecture: Extends the dynamic range of current measurement, enabling smaller sense resistors with lower power loss.
- Bidirectional Current Sensing: Capable of sensing current flow in both directions through the sense resistor.
- Low Quiescent Current: Draws only 48 µA (typ) when enabled and less than 0.1 µA when disabled.
- High-Side and Low-Side Sensing: Supports common-mode voltages from –0.2 V to +40 V, making it suitable for both high-side and low-side current-sensing applications.
- Enable Pin (in DDF package): Allows the device to be turned off when not in use, reducing power consumption.
Applications
- Body Control Module (BCM): For monitoring and controlling various automotive systems.
- Telematics Control Unit: For vehicle communication and navigation systems.
- Emergency Call (eCall) Systems: For emergency communication in vehicles.
- Battery Management System (BMS): For monitoring and managing battery health in electric and hybrid vehicles.
- Automotive Head Unit: For infotainment and other dashboard systems.
Q & A
- What is the supply voltage range for the INA190A1QDCKRQ1?
The supply voltage range is from 1.7 V to 5.5 V.
- What are the gain options available for the INA190-Q1 series?
The gain options are 25 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V.
- What is the common-mode voltage range for this device?
The common-mode voltage range is from –0.2 V to +40 V.
- How does the zero-drift architecture benefit the device?
The zero-drift architecture extends the dynamic range of current measurement, allowing for smaller sense resistors with lower power loss.
- What is the typical quiescent current when the device is enabled?
The typical quiescent current when enabled is 48 µA.
- How much current does the device draw when disabled?
The device draws less than 0.1 µA when disabled.
- What are the package options available for the INA190-Q1?
The package options are SC70 (6-pin) and SOT-23 (8-pin).
- Can the INA190A1QDCKRQ1 sense current in both directions?
- What is the operating temperature range for this device?
The operating temperature range is from –40°C to +125°C.
- What are some typical applications for the INA190A1QDCKRQ1?
Typical applications include body control modules, telematics control units, emergency call systems, battery management systems, and automotive head units.
