Summary of TEXAS INSTRUMENTS TMCS1107 HALL-EFFECT CURRENT SENSOR IS GALVANICALLY ISOLATED
Texas Instruments TMCS1107 is a galvanically isolated Hall-effect current sensor for DC/AC measurements, offering high accuracy, low drift, excellent linearity, and temperature stability. It senses current via an internal 1.8 mΩ conductor and provides fixed-voltage-output sensitivity options, 3kVRMS isolation, 420V working voltage, and operation from 3V to 5.5V with up to 80 kHz bandwidth. Variants support unidirectional or bidirectional sensing with typical total error ±1% and max ±3% across –40°C to 125°C.
Parts used in the TMCS1107 Project:
- Texas Instruments TMCS1107 Hall-effect current sensor
- Internal 1.8 mΩ conductor (integrated in TMCS1107)
- Integrated Hall-effect sensor (within TMCS1107)
- Internal zero drift reference (within TMCS1107)
- Power supply (3V to 5.5V)
- PCB for mounting TMCS1107
- Optional signal conditioning circuitry (external, if required)
- Connectors for input current path and output voltage
Texas Instruments TMCS1107 Hall-Effect Current Sensor 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 1.8mΩ conductor that generates a magnetic field measured by an integrated Hall-effect sensor. This structure eliminates external concentrators and simplifies design. A low conductor resistance minimizes power loss and thermal dissipation. Inherent galvanic insulation provides a 420V lifetime working voltage and 3kVRMS basic 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 TMCS1107 to operate from a single 3V to 5.5V 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 Texas Instruments TMCS1107 draws a maximum supply current of 6mA, and all sensitivity options are specified over the operating temperature range of –40°C to +125°C.
Features
- ±1% typical, ±3% maximum, –40°C to 125°C total error
- ±0.9% sensitivity error
- 40mA offset error
- 0.2mA/°C offset drift
- 0.5% linearity error
- Multiple sensitivity options
- TMCS1107A1B/U – 50mV/A
- TMCS1107A2B/U – 100mV/A
- TMCS1107A3B/U – 200mV/A
- TMCS1107A4B/U – 400mV/A
- Zero drift internal reference
- Bidirectional and unidirectional current sensing
- 3V to 5.5V operating supply range
- 80kHz signal bandwidth
- 3kVRMS isolation rating
- Robust 420V lifetime working voltage
- Safety related certifications
- UL 1577 component recognition program
- IEC/CB 62368-1
Read more: TEXAS INSTRUMENTS TMCS1107 HALL-EFFECT CURRENT SENSOR IS GALVANICALLY ISOLATED
- What is the operating supply range of the TMCS1107?
The TMCS1107 operates from a single 3V to 5.5V power supply. - Does the TMCS1107 provide galvanic isolation?
Yes, it provides inherent galvanic insulation with a 420V lifetime working voltage and 3kVRMS basic isolation. - What sensitivity options are available for the TMCS1107?
Available sensitivities are 50mV/A, 100mV/A, 200mV/A, and 400mV/A (TMCS1107A1 to A4 variants). - Can the TMCS1107 measure both AC and DC currents?
Yes, it is capable of DC or AC current measurement. - What is the typical and maximum total error of the TMCS1107?
Typical total error is ±1% and maximum total error is ±3% over –40°C to 125°C. - Is there a bidirectional sensing option for the TMCS1107?
Yes, both bidirectional and unidirectional sensing variants are available. - What is the signal bandwidth of the TMCS1107?
The device has an 80kHz signal bandwidth. - How much supply current does the TMCS1107 draw?
The TMCS1107 draws a maximum supply current of 6mA.
