Overview
The TMCS1108A3UQDR is a precision analog current sensor IC developed by Texas Instruments. It is designed for high-accuracy current measurements in various applications, including power management and industrial systems. This sensor integrates a 4.096V reference voltage and provides a digital output, ensuring reliable and accurate current sensing. The TMCS1108A3UQDR operates with robust 100-V galvanic isolation, making it suitable for a wide range of industrial and power management applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Continuous current (max) | 20 | A |
| Working isolation voltage (VIOWM) | 71 | Vrms |
| Magnetic sensitivity (typ) | 50, 100, 200, 400 | mV/A |
| Input offset current (±) (max) | 8, 10, 12, 30 | mA |
| Input offset current drift (±) (typ) | 0.2 | µA/°C |
| Supply voltage (max) | 5 | V |
| Supply voltage (min) | 3 | V |
| Iq (max) | 5 | mA |
| CMTI | 50 | kV/µs |
| Small-signal bandwidth | 80,000 | Hz |
| Sensitivity error (%) | 0.9 | % |
| Sensitivity error drift (±) (max) | 105 | ppm/°C |
| Operating temperature range | -40 to 125 | °C |
| Creepage (min) | 4 | mm |
| Clearance (min) | 4 | mm |
| Isolation rating | Functional | |
| Surge isolation voltage (VIOSM) | 6000 | VPK |
Key Features
- Precision analog current sensing with integrated 4.096V reference voltage and digital output.
- Robust 100-V galvanic isolation for high-voltage applications.
- Multiple sensitivity options: 50 mV/A, 100 mV/A, 200 mV/A, and 400 mV/A.
- Operating supply range: 3 V to 5.5 V.
- Signal bandwidth: 80 kHz.
- High accuracy with total error: ±1% typical, ±3% maximum over -40°C to 125°C.
- Excellent linearity and temperature stability.
- Unidirectional current sensing capability.
- Surface mount package (SOIC-8).
Applications
- Motor and load control.
- Inverter and H-bridge current measurements.
- Power factor correction.
- Overcurrent protection.
- DC and AC power monitoring.
Q & A
- Q: Can the TMCS1108A3UQDR measure bi-directional currents?
A: The TMCS1108A3UQDR is designed for uni-directional current sensing. For bi-directional current measurements, consider using specialized sensors with bi-directional capabilities. - Q: Is the TMCS1108A3UQDR suitable for high-voltage applications?
A: Yes, the TMCS1108A3UQDR operates within a specified voltage range and has robust 100-V galvanic isolation, making it suitable for high-voltage applications. - Q: What is the operating temperature range of the TMCS1108A3UQDR?
A: The operating temperature range is -40°C to 125°C. - Q: What is the supply voltage range for the TMCS1108A3UQDR?
A: The supply voltage range is 3 V to 5.5 V. - Q: What is the signal bandwidth of the TMCS1108A3UQDR?
A: The signal bandwidth is 80 kHz. - Q: Does the TMCS1108A3UQDR have multiple sensitivity options?
A: Yes, it offers multiple sensitivity options: 50 mV/A, 100 mV/A, 200 mV/A, and 400 mV/A. - Q: What is the typical total error of the TMCS1108A3UQDR?
A: The typical total error is ±1%, with a maximum error of ±3% over the temperature range of -40°C to 125°C. - Q: Is the TMCS1108A3UQDR suitable for surface mount applications?
A: Yes, it is available in an SOIC-8 surface mount package. - Q: What is the common mode transient immunity (CMTI) of the TMCS1108A3UQDR?
A: The CMTI is 50 kV/µs. - Q: Where can I find detailed technical specifications for the TMCS1108A3UQDR?
A: Detailed technical specifications can be found in the TMCS1108A3UQDR datasheet available on the Texas Instruments website or other authorized distributors.
