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介绍使用CS5525 CS5526数字输出脚控制模拟开关和多
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2009-06-11
fansz
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The CS5525/CS5526 A/D converter is optimized
for the measurement of thermocouples. It is designed
with a single analog input, but includes four
digital output pins to control analog switches and
multiplexers. The performance characteristics of
an analog switch or multiplexer in a thermocouple
digitizer application are important because of the
typical protection circuitry which is included in the
signal path. Figure 1 illustrates a multiplexed thermocouple
circuit which includes input protection.
Resistor R, capacitor C, and diodes D1 and D2 provide
input protection for the analog switch and the
A/D converter. Input protection guards against
ESD (Electro-Static Discharge), high voltage
glitches which can get coupled into long thermocouple
leads in an industrial environment, and incorrect
connections which can cause +24 volts to
become directly connected to the digitizer input
terminals.
for the measurement of thermocouples. It is designed
with a single analog input, but includes four
digital output pins to control analog switches and
multiplexers. The performance characteristics of
an analog switch or multiplexer in a thermocouple
digitizer application are important because of the
typical protection circuitry which is included in the
signal path. Figure 1 illustrates a multiplexed thermocouple
circuit which includes input protection.
Resistor R, capacitor C, and diodes D1 and D2 provide
input protection for the analog switch and the
A/D converter. Input protection guards against
ESD (Electro-Static Discharge), high voltage
glitches which can get coupled into long thermocouple
leads in an industrial environment, and incorrect
connections which can cause +24 volts to
become directly connected to the digitizer input
terminals.
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ksdd
2011-06-03
8 回复 举报技术交流、我要发言最近没来了，才发现已经改版了。 收起回复
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