10位数字温度传感器（AD7416）和四个单通道ADC

　　The AD7417 and AD7418 are 10-bit， 4-channel and single-channel ADCs with an on-chip temperature sensor that can operate from a single 2.7 V to 5.5 V power supply. The devices contain a 15 μs successive approximation converter， a 5-channel multiplexer， a temperature sensor， a clock oscillator， a track-and-hold， and a reference （2.5 V）。 The AD7416 is a temperature-monitoring only device in an 8-lead package. The temperature sensor on the parts can be accessed via multiplexer Channel 0. When Channel 0 is selected and a conversion is initiated， the resulting ADC code at the end of the conversion gives a measurement of the ambient temperature （±1°C @ 25°C）。 On-chip registers can be programmed with high and low temperature limits， and an open-drain overtemperature indicator （OTI） output is provided， which becomes active when a programmed limit is exceeded. A configuration register allows programming of the sense of the OTI output （active high or active low） and its operating mode （comparator or interrupt）。 A programmable fault queue counter allows the number of out-of-limit measurements that must occur before triggering the OTI output to be set to prevent spurious triggering of the OTI output in noisy environments.