The TMCS1108-Q1 is a galvanically isolated Hall-effect current sensor capable of DC or AC current measurement with high accuracy, excellent linearity, and temperature stability. A low-drift, temperature-compensated signal chain provides <3% full-scale error across the device temperature range.
The input current flows through an internal 1.8-mΩ conductor that generates a magnetic field measured by an integrated Hall-effect sensor. This structure eliminates external concentrators and simplifies design. Low conductor resistance minimizes power loss and thermal dissipation. Inherent galvanic insulation provides a 100-V functional isolation between the current path and circuitry. Integrated electrical shielding enables excellent common-mode rejection and transient immunity.
The output voltage is proportional to the input current with multiple sensitivity options. Fixed sensitivity allows the TMCS1108-Q1 to operate from a single 3-V to 5.5-V power supply, eliminates ratiometry errors, and improves supply noise rejection. The current polarity is considered positive when flowing into the positive input pin. Both unidirectional and bidirectional sensing variants are available.
The TMCS1108-Q1 draws a maximum supply current of 6 mA, and all sensitivity options are specified over the operating temperature range of –40°C to +125°C.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | TMCS1108-Q1 AEC-Q100, 3% Functional Isolation Hall-Effect Current Sensor With ±100-V Working Voltage datasheet | PDF | HTML | 01 Jul 2021 |
| Application brief | Low-Drift, Precision, In-Line Isolated Magnetic Motor Current Measurements (Rev. A) | 24 Jul 2023 | ||
| Application note | TMCS110x Layout Challenges and Best Practices | PDF | HTML | 03 Dec 2022 | |
| White paper | Improve High-Voltage System Efficiency With Zero-Drift Hall-Effect Current Sense (Rev. A) | PDF | HTML | 15 Mar 2022 | |
| Functional safety information | TMCS1108-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA | PDF | HTML | 30 Mar 2021 | |
| EVM User's guide | TMCS1108EVM User's Guide | PDF | HTML | 04 Dec 2020 | |
| Application note | Thermal Implementation Guide for In-Package Magnetic Current Sensors | PDF | HTML | 12 Jul 2020 | |
| Application brief | Precision Designs with Non-Ratiometric Magnetic Current Sensors | 01 Jul 2019 |
For additional terms or required resources, click any title below to view the detail page where available.
The TMCS1108EVM is intended to facilitate rapid, convenient use of the TMCS1108, an isolated Hall-effect precision current sense monitor utilizing an internal ratiometric reference. This evaluation module (EVM) allows the designer to push the max operating current through the Hall-input side while (...)
| Package | Pins | Download |
|---|---|---|
| SOIC (D) | 8 | View options |
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