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TC72-3.3MUATR датащи(PDF) 8 Page - Microchip Technology |
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TC72-3.3MUATR датащи(HTML) 8 Page - Microchip Technology |
8 / 24 page TC72 DS21743A-page 8 2002 Microchip Technology Inc. 3.0 FUNCTIONAL DESCRIPTION The TC72 consists of a band-gap type temperature sensor, a 10-bit Sigma Delta Analog-to-Digital Con- verter (ADC), an internal conversion oscillator and a double buffer digital output port. The 10-bit ADC is scaled from -128°C to +127°C; therefore, the resolution is 0.25°C per bit. The ambient temperature operating range of the TC72 is specified from -55°C to +125°C. This device features a four-wire serial interface that is fully compatible with the SPI specification and, there- fore, allows simple communications with common microcontrollers and processors. The TC72 can be used either in a Continuous Temperature Conversion mode or a One-Shot Conversion mode. The TC72 tem- perature measurements are performed in the back- ground and, therefore, reading the temperature via the serial I/O lines does not affect the measurement in progress. The Continuous Conversion mode measures the tem- perature approximately every 150 ms and stores the data in the temperature registers. The TC72 has an internal clock generator that controls the automatic temperature conversion sequence. The automatic tem- perature sampling operation is repeated indefinitely until the TC72 is placed in a shutdown mode by a write operation to the Control register. The TC72 will remain in the shutdown mode until the shutdown bit in the Control register is reset. In contrast, the One-Shot mode performs a single tem- perature measurement and returns to the power-sav- ing shut down mode. This mode is especially useful for low power applications. FIGURE 3-1: Temperature-To-Digital Transfer Function (Non-linear Scale). Temp Temp Output Code +125°C -55°C +25°C -25°C +0.25°C -0.125°C 0111 1101 / 0000 0000 MSB LSB Note: The ADC converter is scaled from -128°C to -127°C, but the operating range of the TC72 is specified from -55°C to +125°C. 0001 1001 / 0000 0000 MSB LSB 0000 0000 / 0100 0000 MSB LSB 0000 0000 / 0000 0000 MSB LSB 1111 1111 / 1100 0000 MSB LSB 1110 0111 / 0000 0000 MSB LSB 1100 1001 / 0000 0000 MSB LSB 0°C |
Аналогичный номер детали - TC72-3.3MUATR |
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Аналогичное описание - TC72-3.3MUATR |
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