C8051F336-GM View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

Manufacturer

C8051F336-GM

Mixed-Signal Byte-Programmable EPROM MCU

Silicon Laboratories 

C8051F336/7/8/9

8. Temperature Sensor (C8051F336/8 only)

An on-chip temperature sensor is included on the C8051F336/8 which can be directly accessed via the

ADC multiplexer in single-ended configuration. To use the ADC to measure the temperature sensor, the

positive ADC mux channel should be configured to connect to the temperature sensor and the negative

ADC mux channel should be configured to connect to GND. The temperature sensor transfer function is

shown in Figure 8.1. The output voltage (VTEMP) is the positive ADC input when the ADC multiplexer is set

correctly. The TEMPE bit in register REF0CN enables/disables the temperature sensor, as described in

SFR Definition 10.1. While disabled, the temperature sensor defaults to a high impedance state and any

ADC measurements performed on the sensor will result in meaningless data. Refer to Section

“6. Electrical Characteristics” on page 27 for the slope and offset parameters of the temperature sen-

sor.

VTEMP = (Slope x TempC) + Offset

TempC = (VTEMP - Offset) / Slope

Slope (V / deg C)

Offset (V at 0 Celsius)

Temperature

Figure 8.1. Temperature Sensor Transfer Function

Rev.1.0

51

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