參數(shù)資料
型號： MCP4461-103E/ML
廠商： Microchip Technology
文件頁數(shù)： 94/100頁
文件大?。?/td> 0K
描述： IC DGTL POT 257TAPS 10K 20QFN
標(biāo)準(zhǔn)包裝： 91
接片： 257
電阻（歐姆）： 10k
電路數(shù)： 4
溫度系數(shù)： 標(biāo)準(zhǔn)值 150 ppm/°C
存儲器類型： 非易失
接口： I²C（設(shè)備位址）
電源電壓： 2.7 V ~ 5.5 V
工作溫度： -40°C ~ 125°C
安裝類型： 表面貼裝
封裝/外殼： 20-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 20-QFN 裸露焊盤（4x4）
包裝： 管件
2010 Microchip Technology Inc.
DS22265A-page 93
MCP444X/446X
FIGURE B-6:
Resistor Network Block
Diagram.
The characteristics of the wiper are determined by the
characteristics of the wiper switch at each of the
resistor networks tap points. Figure B-7 shows an
example of a wiper switch. As the device operational
voltage becomes lower, the characteristics of the wiper
switch change due to a lower voltage on the VG signal.
Figure B-7 shows an implementation of a wiper switch.
When the transistor is turned off, the switch resistance
is in the Giga
Ωs. When the transistor is turned on, the
switch resistance is dependent on the VG, VW and
VWCn voltages. This resistance is referred to as RW.
FIGURE B-7:
Wiper Switch.
So looking at the wiper voltage (VW) for the
3.0V and 1.8V data gives the graphs in Figure B-8 and
Figure B-9. In the 1.8V graph, as the VW approaches
0.8V, the voltage increases nonlinearly. Since V = I * R,
and the current (IW) is constant, it means that the
device resistance increased nonlinearly at around
wiper code 160.
FIGURE B-8:
Wiper Voltage (VW) vs.
Wiper Code (VDD = 3.0V, IW = 190 A).
FIGURE B-9:
Wiper Voltage (VW) vs.
Wiper Code (VDD = 1.8V, IW = 190 A).
RS
A
RS
B
RW (1)
W
RW (1)
Note 1:
The wiper resistance is dependent on
several factors including, wiper code,
device VDD, Terminal voltages (on A, B
and W), and temperature.
RAB
NMOS
PMOS
N0
Nn-1
N1
Nn
Nn-2
Nn-3
VW
VB
VA
VWC(n-2)
DVG
Note 1:
Wiper Resistance (RW) depends on the
voltages at the wiper switch nodes
(VG, VW and VWCn).
RW (1)
NMOS
PMOS
NWC
Wiper
VG (VDD/VSS)
“gate”
VW
VWCn
0.0
0.2
0.4
0.6
0.8
1.0
1.2
0
32
64
96
128 160 192 224 256
Wiper Code
Wiper
Voltage
(V)
-40C
+25C
+85C
+125C
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0
32
64
96
128 160 192 224 256
Wiper Code
Wiper
Voltage
(V)
-40C
+25C
+85C
+125C
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參數(shù)描述
MCP4461-104E/ML 功能描述:數(shù)字電位計 IC 100k I2C Quad Ch 8bt Nonvolatile Memory RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel
MCP4461-104E/ML 制造商:Microchip Technology Inc 功能描述:; End To End Resistance:100kohm; Track T 制造商:Microchip Technology Inc 功能描述:IC, DIG POT, 100kohm, 257STEPS, QUAD, QFN-20
MCP4461-104E/ST 功能描述:數(shù)字電位計 IC 100k I2C Quad Ch 8bt Nonvolatile Memory RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel
MCP4461-104E/ST 制造商:Microchip Technology Inc 功能描述:; End To End Resistance:100kohm; Track T 制造商:Microchip Technology Inc 功能描述:IC, DIG POT, 100kohm, 257STEPS, QUAD, TSSOP-20
MCP4461-502E/ML 功能描述:數(shù)字電位計 IC 5k I2C Quad Ch 8bit Nonvolatile Memory RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel
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