参数资料
型号: 20-151-0178
厂商: Rabbit Semiconductor
文件页数: 58/162页
文件大小: 0K
描述: CABLE CONVERTER RS-232 TO USB
标准包装: 1
附件类型: USB 至 RS232 适配器
适用于相关产品: 基于 Rabbit 的板
产品目录页面: 619 (CN2011-ZH PDF)
其它名称: 20-151-0178-ND
316-1181
2.35 ms × # A/D channels
4.3.13 Analog-to-Digital Converters
The RabbitFLEX BL300F has a ramp-compare ADC. Up to 16 channels are available. The analog inputs
can be on any combination of pins 1 through 8 on both J3 and J4. The design of the ADCs allow you to
choose a current or voltage input on these pins. The measurement range options are:
? 0-3 V
? 0-10 V
? 4-20 mA
The ADCs work with single-ended unipolar voltage inputs and industry standard 4-20 mA current loops.
The digital result has an 8-bit resolution and the sampling frequency is determined by the following equa-
tion.
1000 ms
Sampling Frequency for ADCs = ---------------------------------------------------------------
The ADC channels are sampled round-robin, so the sampling frequency depends on the number of analog-
to-digital channels that exist on the RabbitFLEX BL300F. If there is only one ADC, the sampling fre-
quency is about 425 samples per second. If the maximum of 16 ADCs exist, the sampling frequency is
about 25 samples per second.
The ADCs are not meant for applications that require very fast data acquisition rates. They are suitable for
measuring analog voltages that change slowly.
52
RabbitFLEX BL300F Options
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