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参数资料
| 型号： | DS1802E+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/17页 |
| 文件大小： | 0K |
| 描述： | IC POT DL AUDIO TAP W/PB 20TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 接片： | 64 |
| 电阻（欧姆）： | 45k |
| 电路数： | 2 |
| 温度系数： | 标准值 750 ppm/°C |
| 存储器类型： | 易失 |
| 接口： | 3 线串行，按钮 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 带卷 (TR) |
DS1802
8 of 17
All contact closure control inputs, UC0, UC1, DC0, DC1, VU, VD, B0 and B1 are internally pulled up by
a 50 kO resistance. The UC0, UC1, DC0 DC1, VU, VD, B0, and B1 inputs are internally debounced and
require no external components for input signal conditioning.
3-WIRE SERIAL INTERFACE CONTROL
One method of communication and control of the DS1802 is accomplished through a 3-wire serial port
interface that drives an internal control logic unit. The 3-wire serial interface is designed for
microprocessor or microcontroller applications. The interface consists of three input signals which
include RST , CLK and D.
The RST control signal is used to enable 3-wire serial port write operations. The CLK terminal is a clock
signal input that provides synchronization for data I/O while the D signal input serves to transfer
potentiometer wiper position settings to the device.
As shown in Figure 5, a 3-wire serial port operation begins with a transition of the RST signal input to a
high state. Once the 3-wire port has been activated, data is clocked into the part on the low to high
transition of the CLK signal input. Data inp ut via the D line is transferred in order of the desired
potentiometer-0 value followed by the potentiometer-1 value.
The DS1802 contains two 65-position potentiometers whose wiper positions are set by an 8-bit value.
These two 8-bit values are written to the 16-bit I/O shift register which is used to store wiper position
during powered conditions. Because the potentiometer has 65-positions, only seven bits of data are
needed to set wiper position. A detailed diagram of the 16-bit I/O shift register is shown in Figure 5. Bits
0 through 7 are reserved for the potentiometer-0 control while bits 8 through 15 are reserved for control
of potentiometer-1.
Bits 0 through 5 are used for actual wiper positioning for potentiometer-0. Bit 6 is used to mute
potentiometer-0. If this bit has value 1, the potentiometer-0 wiper will be connected to the low end of the
resistive array. The mute feature of the DS1802 will be discussed in the section entitled “Mute Operation
of DS1802.” The value of bit 7 is a "don’t care" and will not affect operation of the DS1802 or
potentiometer-0.
Bits 8 through 13 are used for wiper positioning of potentiometer-1. Bit 14 is used for muting of the
potentiometer-1 wiper output. Bit 15, like bit 7, is a "don’t care" and will not affect operation of the
DS1802.
Data for the DS1802 is transmitted LSB first starting with bit 0. A complete transmission of 16 bits of
data is required to insure proper setting of each potentiometer’s wiper. An incomplete transmission may
result in undesired wiper settings.
Once the complete 16 bits of information has been transmitted and the RST signal input transitions to a
low state, the new wiper positions are loaded into the part.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1802S | 功能描述:数字电位计 IC RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| DS1802S+ | 功能描述:数字电位计 IC Dual Audio Taper Potentiometer RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| DS1803 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Addressable Dual Digital Potentiometer |
| DS18030-010 | 功能描述:数字电位计 IC RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
| DS18030-010+ | 功能描述:数字电位计 IC Addressable Dual RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel |
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