参数资料
型号: TC7126CLW713
厂商: Microchip Technology
文件页数: 13/26页
文件大小: 0K
描述: IC ADC 3 1/2DGT LCD DVR 44-PLCC
标准包装: 500
显示器类型: LCD
配置: 7 段显示
数字或字符: A/D,3.5 位数字
电流 - 电源: 55µA
电源电压: 9V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 44-LCC(J 形引线)
供应商设备封装: 44-PLCC
包装: 带卷 (TR)
TC7126/A
6.6
Reference Voltage Selection
A full scale reading (2000 counts) requires the input
signal be twice the reference voltage.
Required Full Scale Voltage*
20mV
2V
V REF
100mV
1V
Note:
V FS = 2V REF .
In some applications, a scale factor other than unity
may exist between a transducer output voltage and the
required digital reading. Assume, for example, a
pressure transducer output for 2000lb/in 2 is 400mV.
Rather than dividing the input voltage by two, the
reference voltage should be set to 200mV. This permits
the transducer input to be used directly.
The differential reference can also be used where a
digital zero reading is required when V IN is not equal to
zero. This is common in temperature measuring instru-
mentation. A compensating offset voltage can be
applied between analog common and V IN -. The trans-
ducer output is connected between V IN + and analog
common.
? 2006 Microchip Technology Inc.
DS21458C-page 13
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