Overview
The TMCS1108A1UQDRQ1 is a galvanically isolated Hall-effect current sensor produced by Texas Instruments. This device is designed for high-accuracy DC or AC current measurement, featuring excellent linearity and temperature stability. It is AEC-Q100 qualified, making it suitable for automotive applications with a temperature range of –40°C to 125°C. The TMCS1108-Q1 series includes multiple sensitivity options and supports both unidirectional and bidirectional current sensing. The device operates from a single 3-V to 5.5-V power supply and provides robust 100-V galvanic isolation between the current path and circuitry.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Sensitivity | 50 mV/A | mV/A |
| Total Error | ±1% typical, ±3% maximum | % |
| Sensitivity Error | ±0.9% | % |
| Offset Error | ±40 mA | mA |
| Offset Drift | 0.2 mA/°C | mA/°C |
| Linearity Error | 0.5% | % |
| Operating Supply Range | 3 V to 5.5 V | V |
| Signal Bandwidth | 80 kHz | kHz |
| Galvanic Isolation | 100 V | V |
| Input Conductor Resistance | 1.8 mΩ | mΩ |
| Allowable Continuous RMS Current | Up to 30 A at 25°C | A |
Key Features
- High Accuracy: Total error of ±1% typical, ±3% maximum across the temperature range.
- Multiple Sensitivity Options: Available in 50 mV/A, 100 mV/A, 200 mV/A, and 400 mV/A sensitivity options.
- Galvanic Isolation: 100-V functional isolation between the current path and circuitry.
- Temperature Stability: Operates over a temperature range of –40°C to 125°C.
- Low Drift: Zero drift internal reference and low offset drift.
- Bidirectional and Unidirectional Sensing: Supports both types of current sensing.
- Robust Design: Integrated electrical shielding for excellent common-mode rejection and transient immunity.
Applications
- Motor and Load Control: For precise current measurement in motor control systems.
- Inverter and H-Bridge Current Measurements: Suitable for high-accuracy current sensing in inverter and H-bridge configurations.
- Power Factor Correction: Used in power factor correction circuits to ensure high efficiency.
- Overcurrent Protection: For detecting and preventing overcurrent conditions in various applications.
- DC and AC Power Monitoring: Ideal for monitoring both DC and AC power in various systems.
Q & A
- What is the operating temperature range of the TMCS1108-Q1?
The TMCS1108-Q1 operates over a temperature range of –40°C to 125°C.
- What are the available sensitivity options for the TMCS1108-Q1?
The device is available in 50 mV/A, 100 mV/A, 200 mV/A, and 400 mV/A sensitivity options.
- What is the maximum allowable continuous RMS current for the TMCS1108-Q1 at 25°C?
The maximum allowable continuous RMS current is up to 30 A at 25°C.
- Does the TMCS1108-Q1 support galvanic isolation?
- What is the signal bandwidth of the TMCS1108-Q1?
The signal bandwidth is 80 kHz.
- Is the TMCS1108-Q1 suitable for automotive applications?
- What is the input conductor resistance of the TMCS1108-Q1?
The input conductor resistance is 1.8 mΩ.
- Does the TMCS1108-Q1 support both unidirectional and bidirectional current sensing?
- What is the typical total error of the TMCS1108-Q1?
The typical total error is ±1%.
- What is the operating supply range of the TMCS1108-Q1?
The device operates from a single 3-V to 5.5-V power supply.
