参数资料
型号: MCP402XEV
厂商: Microchip Technology
文件页数: 15/46页
文件大小: 0K
描述: BOARD EVAL FOR MCP402X
标准包装: 1
主要目的: 数字电位器
嵌入式: 是,MCU,8 位
已用 IC / 零件: MCP4021
主要属性: 1 个单路电位器,10 千欧,64 抽头,非易失
次要属性: 2.7 ~ 5.5 V,150 ppm/°C
已供物品: 2 板,样品,CD
产品目录页面: 677 (CN2011-ZH PDF)
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Installation and Operation
2.3.1
Test Setup
1. Connect the power supply “+” to V DD and the “–” to GND.
2. Connect the voltmeter to the W terminal and GND.
The voltmeter should reflect the wiper setting with respect to Equation 2-3.
EQUATION 2-3:
POPULATED PCB – VOLTAGE DIVIDER CALCULATION
V wiper = ------------------------------------------- = ---------------------------------------------------------------------
R2 + R3 + R AB
V DD ? ( R wb + R3 ) 5.0V ? ( ( d ? 10k ) ? 63 + 2.5k )
2.5k + 2.5k + 10k
Where:
d = the wiper setting (0 to 63)
Using R2 and R3 = 2.5 k Ω:
? If a 2 k Ω MCP4021 is utilized, the output range will be approximately 1.79V to
3.21V.
? If a 5 k Ω MCP4021 is utilized, the output range will be approximately 1.25V to
3.75V.
? If a 10 k Ω MCP4021 is utilized, the output range will be approximately 0.83V to
4.17V.
? If a 50 k Ω MCP4021 is utilized, the output range will be approximately 0.23V to
4.77V.
? 2005 Microchip Technology Inc.
DS51546B-page 11
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