参数资料
型号: TC9400COD713
厂商: Microchip Technology
文件页数: 9/28页
文件大小: 545K
描述: IC V-FREQ/FREQ-V CONV 14SOIC
标准包装: 2,600
类型: 电压至频率和频率至电压
频率 - 最大: 100kHz
全量程: ±40ppm/°C
线性: ±0.05%
安装类型: 表面贴装
封装/外壳: 14-SOIC(0.154",3.90mm 宽)
供应商设备封装: 14-SOIC
包装: 带卷 (TR)
?2007 Microchip Technology Inc.
DS21483D-page 9
TC9400/9401/9402
3.2  Voltage-to-Time Measurements
The TC9400 output can be measured in the time
domain as well as the frequency domain. Some micro-
computers, for example, have extensive timing capabil-
ity, but limited counter capability. Also, the response
time of a time domain measurement is only the period
between two output pulses, while the frequency
measurement must accumulate pulses during the
entire counter time-base period.
Time measurements can be made from either the
TC9400s PULSE FREQ OUT output, or from the
FREQ/2 OUT output. The FREQ/2 OUT output
changes state on the rising edge of PULSE FREQ
OUT, so FREQ/2 OUT is a symmetrical square wave at
one-half the pulse output frequency. Timing measure-
ments can, therefore, be made between successive
PULSE FREQ OUT pulses, or while FREQ/2 OUT is
high (or low).
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