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參數(shù)資料
| 型號： | MCP4451-502E/ML |
| 廠商： | Microchip Technology |
| 文件頁數(shù)： | 12/22頁 |
| 文件大小： | 0K |
| 描述： | IC POT 5K QUAD 8BIT 20QFN |
| 標準包裝： | 91 |
| 接片： | 257 |
| 電阻（歐姆）： | 5k |
| 電路數(shù)： | 4 |
| 溫度系數(shù)： | 標準值 150 ppm/°C |
| 存儲器類型： | 易失 |
| 接口： | I²C（設備位址） |
| 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： | 20-VFQFN 裸露焊盤 |
| 供應商設備封裝： | 20-QFN 裸露焊盤（4x4） |
| 包裝： | 管件 |
2
Digital Potentiometer Design Guide
Microchip’s Family of Digital Potentiometers
Microchip offers a range of devices that allow the customer
to select a device that is a best fit for their application. Some
of the selection options include:
■ A wide range of resistor values
– RAB resistance (typical) from 2.1 kΩ to 100 kΩ
■ Step resolution
– 6-bit
– 7-bit
– 8-bit
■ Serial interfaces
– Up/Down
– SPI
– I2C
■ Memory types
– Volatile
– Non-volatile
■ Resistor network configurations
– Potentiometer (resistor divider)
– Rheostat (variable resistor)
■ Single, dual and quad potentiometer options
■ Package options
■ Special features
– Shutdown mode
– WiperLock technology
■ Low voltage, Low power options
Resistor sizes and resolutions allow the designer to select
the step resistance and number of steps. For the device with
the resistance (RAB) equal to 2.1 kΩ, there are 64 steps (63
resistors), so the step resistance (RS) equals RAB/63 (or
33.33Ω). For a 5 kΩ device with 257 steps (256 resistors), a
step resistance (RS) equals RAB/256 = 19.53Ω. Now at the
other end of the spectrum, for the device with the resistance
(RAB) equal to 50 kΩ, there are 64 steps (63 resistors), so
the step resistance (RS) equals RAB/63 (or 793.65Ω).
The serial interface options allow the designer to easily
integrate the device into the application. For some
applications the simple Up/Down interface will be adequate.
For devices with higher resolution (7-bit, 8-bit) being able
to directly write/read the wiper register is desirable. This
is supported with SPI and I2C interfaces. SPI is simpler to
implement, but I2C uses only 2 signals (pins) and supports
multiple devices on the serial bus without additional pins.
The availability of both volatile and non-volatile devices
allows the designer flexibility in optimizing the application.
Some applications may use the digital potentiometer as a
replacement for a mechanical potentiometer. In this case, a
non-volatile device with the serial interface connecting to the
test hardware interface allows a low cost device with low cost
manufacturing.
Resistor network configurations allow the package size/
cost to be minimized for the desired functionality. If a
variable resistor (rheostat) with one terminal tied to ground
is desired, then only one resistor terminal (the wiper) needs
to be implemented. In the MCP4017/18/19 family, this
configuration is shown in the MCP4019 and allows the
functionality to be achieved in a low-cost SC70-5 package.
Dual and quad digital potentiometer resistor networks
are closely matched, due to residing on the same silicon.
Matched components allow customers to achieve better
system performance in some applications
Packaging options allow customers to address their system
requirement trade-offs including device cost, board area, and
manufacturing sites (surface mount vs. thru-hole). Packages
include 3x3 mm SOT-23 and DFN packages, 3x2 mm DFN
package and tiny SC70 packages.
Digital Potentiometer Solutions
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| MCP4451-503E/ML | 功能描述:數(shù)字電位計 IC 50k I2Cquad Ch Pot 8bit volatile 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MCP4451-503E/ST | 功能描述:數(shù)字電位計 IC 50k I2Cquad Ch Pot 8bit volatile 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MCP4451T-502E/ST | 制造商:Microchip Technology Inc 功能描述:5K, I2C, QUAD CHANNEL POT, 8-BIT, VOLATILE MEMORY, TSSOP - Tape and Reel |
| MCP4452-103E/ST | 功能描述:數(shù)字電位計 IC 10k I2Cquad Ch Rheo 8bit volatile 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MCP4452-104E/ST | 功能描述:數(shù)字電位計 IC 100k I2Cquad Ch Rheo 8bit volatile 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
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