Step resistance (RS) is " />
參數(shù)資料
型號(hào)： MCP4017T-502E/LT
廠商： Microchip Technology
文件頁(yè)數(shù)： 37/51頁(yè)
文件大?。?/td> 0K
描述： IC DGTL POT 5K 128TAPS SC70-6
標(biāo)準(zhǔn)包裝： 1
接片： 128
電阻（歐姆）： 5k
電路數(shù)： 1
溫度系數(shù)： 標(biāo)準(zhǔn)值 150 ppm/°C
存儲(chǔ)器類型： 易失
接口： I²C
電源電壓： 1.8 V ~ 5.5 V
工作溫度： -40°C ~ 125°C
安裝類型： 表面貼裝
封裝/外殼： 6-TSSOP，SC-88，SOT-363
供應(yīng)商設(shè)備封裝： SC-70-6
包裝： 標(biāo)準(zhǔn)包裝
產(chǎn)品目錄頁(yè)面： 674 (CN2011-ZH PDF)
其它名稱： MCP4017T-502E/LTDKR
MCP4017/18/19
DS22147A-page 42
2009 Microchip Technology Inc.
Step resistance (RS) is the resistance from one tap
setting to the next. This value will be dependent on the
RAB value that has been selected. Equation 6-1 shows
the calculation for the step resistance while Table 6-2
shows the typical step resistances for each device.
EQUATION 6-1:
RS CALCULATION
Equation 6-2 illustrates the calculation used to
determine the resistance between the wiper and
terminal B.
EQUATION 6-2:
RWB CALCULATION
The digital potentiometer is available in four nominal
resistances (RAB) where the nominal resistance is
defined as the resistance between terminal A and
terminal B. The four nominal resistances are 5 k
Ω,
10 k
Ω, 50 kΩ, and 100 kΩ.
The total resistance of the device has minimal variation
due to operating voltage (see Figure 2-11, Figure 2-29,
TABLE 6-2:
STEP RESISTANCES
A POR/BOR event will load the Volatile Wiper register
value with the default value. Table 6-3 shows the
default values offered.
TABLE 6-3:
DEFAULT FACTORY
SETTINGS SELECTION
Part Number
Resistance (
Ω)
Case
Total
(RAB)
Step (RS)
MCP4017/18/19-502E
Min.
4000
31.496
Typical 5000
39.370
Max.
6000
47.244
MCP4017/18/19-103E
Min.
8000
62.992
Typical 10000
78.740
Max.
12000
94.488
MCP4017/18/19-503E
Min.
40000
314.961
Typical 50000
393.701
Max.
60000
472.441
MCP4017/18/19-104E
Min.
80000
629.921
Typical 100000
787.402
Max.
120000
944.882
RS
RAB
127
---------
=
RWB
RABN
127
-------------- RW
+
=
N = 0 to 127 (decimal)
Resistance
Code
Typical
RAB Value
Default POR Wiper
Setting
Code (1)
-502
5.0 k
Ω
Mid-scale
3Fh
-103
10.0 k
Ω
Mid-scale
3Fh
-503
50.0 k
Ω
Mid-scale
3Fh
-104
100.0 k
Ω
Mid-scale
3Fh
Note 1: Custom POR/BOR Wiper Setting options
are available, contact the local Microchip
Sales Office for additional information.
Custom options have minimum volume
requirements.
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