描述 Description

The TMCS1100-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 < 1% 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 600-V lifetime working voltage and 3-kVRMS 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 four sensitivity options. Fixed sensitivity allows the TMCS1100-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. The VREF input pin provides a variable zero-current output voltage, enabling bidirectional or unidirectional current sensing.

The TMCS1100-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.

特性 Features

? AEC-Q100 qualified for automotive applications
? Functional Safety-Capable
? Total error: ±0.4% typical, ±0.9% maximum, –40°C to 85°C
? Offset error: 7 mA
? Linearity error: 0.05%
? Lifetime and environmental drift: RMS isolation rating
? Bidirectional and unidirectional current sensing
? Operating supply range: 3 V to 5.5 V
? Multiple sensitivity options:
? TMCS1100A2 -Q1: 100 mV/A
? TMCS1100A4 -Q1: 400 mV/A
? Safety related certifications
? IEC/CB 62368-1