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Precision isolated current sensor with external reference
8-SOICHersteller:
Texas Instruments
Herstellerteil #:
TMCS1100A1QDT
Datenblatt:
Sensor Type:
Current Sense
Type:
Galvanically Isolated Hall-Effect Current Sensor
Operating Supply Voltage:
5 V
Output Type:
Analog
EDA/CAD Modelle:
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The TMCS1100 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 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 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.
Product Category | Board Mount Current Sensors | Sensor Type | Current Sense |
Type | Galvanically Isolated Hall-Effect Current Sensor | Operating Supply Voltage | 5 V |
Output Type | Analog | Series | TMCS1100 |
Maximum Operating Temperature | + 125 C | Minimum Operating Temperature | - 40 C |
Moisture Sensitive | Yes | Product Type | Current Sensors |
Factory Pack Quantity | 250 | Subcategory | Sensors |
Supply Voltage - Max | 5.5 V | Supply Voltage - Min | 3 V |
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