Texas Instruments TMCS1127/TMCS1127-Q1 Hall-Effect Current Sensors
Texas Instruments TMCS1127/TMCS1127-Q1 Hall-Effect Current Sensors are galvanically isolated Hall-Effect current sensors with industry-leading accuracy and isolation. An output voltage proportional to the input current is provided with low drift and excellent linearity at all sensitivity options. Precision signal conditioning circuitry with built-in drift compensation is capable of less than 2.75% maximum sensitivity error over temperature and lifetime with no system-level calibration or less than 1.5% maximum sensitivity error, including temperature and lifetime drift with a one-time calibration at room temperature.
AC or DC input current flows through an internal conductor on the Texas Instruments TMCS1127/TMCS1127-Q1. This feature generates a magnetic field that an integrated, on-chip Hall-effect sensor measures. The core-less construction of the device eliminates the need for magnetic concentrators. Differential Hall sensors reject interference from any stray external magnetic fields. While easing thermal dissipation requirements and minimizing power loss, the low conductor resistance increases measurable current ranges up to ±96A. Insulation capable of withstanding 5kVRMS, coupled with a minimum of 8mm creepage and clearance, provides high levels of reliable lifetime reinforced working voltage. An integrated shielding enables excellent common-mode rejection and transient immunity.
The device's fixed sensitivity allows it to operate from a single 3V to 5.5V power supply, eliminating ratiometry errors and improving supply noise rejection. The TMCS1127-Q1 devices are AEC-Q100 qualified for automotive applications.
Features
- A high continuous current capability of 80ARMS
- Robust reinforced isolation
- High accuracy
- ±0.4% sensitivity error
- ±40ppm/°C sensitivity thermal drift
- ±0.2% sensitivity lifetime drift
- Offset error of ±0.7mV
- Offset thermal drift of ±10µV/°C
- Offset lifetime drift of ±12mA
- ±0.2% non-linearity
- High immunity to external magnetic fields
- Fast response
- Signal bandwidth of 250kHz
- 1µs response time
- 110ns propagation delay
- 3V to 5.5V operating supply range
- Bidirectional and unidirectional current sensing
- Multiple sensitivity options
- Ranging from 25mV/A to 200mV/A
- Safety-related certifications (planned)
- UL 1577 Component Recognition Program
- IEC/CB 62368-1
Applications
- Solar energy
- Motor control
- EV charging
- Power supplies
- Industrial AC/DC
Related Development Tools
Texas Instruments TMCS1127xEVM Sensor Evaluation Modules (EVMs)
Facilitates the use of the TMCS1127, an isolated Hall-effect precision current sense monitor.
Texas Instruments TMCS-A-ADAPTER-EVM Sensor Evaluation Module
Facilitates the rapid, convenient use of TMCS-isolated Hall-effect precision current sense monitors.
Typical Application
