Voltage Output Temperature Sensor

Last modified by Microchip on 2023/11/09 09:03

What is a Voltage Output Temperature Sensor?

A voltage output temperature sensor provides an analog output signal of varying voltage on a single pin. The output voltage has a factory set slope (e.g., 10 mV/°C) and correlates to the ambient temperature of the device. The device output is typically connected to a stand-alone or integrated Analog-to-Digital Converter (ADC).

Key Features

  • Easy System Integration
  • Reduced PCB Space
  • Low Current Consumption
  • Minimizes Design Time
  • Voltage Output Temperature Sensor

Typical Applications

  • Cellular Phones
  • Temperature Measurement/Instrumentation
  • Consumer Electronics

The circuit shown in Figure 1 can be used to measure an LCD panel’s temperature at multiple locations. The TC1047A temperature sensor is used to monitor LCD temperature change. The operational amplifier, MCP6021 functions as an averaging circuit to provide a composite voltage output that can be used to adjust the LCD contrast.

lcd contrast control

Figure 1

TC1047A Key Features

  • Wide Temperature Measurement Range: -40 °C to +125 °C
  • High Temperature Accuracy: ±0.5 °C (typical)
  • Linear Temperature Slope: 10 mV/°C

MCP6021 (Op Amp) Key Features

  • Single-Supply: 2.5V to 5.5V
  • Rail-to-Rail Input and Output
  • Unity-Gain Stable
  • VDD/2 Reference Output

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