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| 型号： | DS1802 |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/17页 |
| 文件大小： | 0K |
| 描述： | IC POT DL AUDIO TAP W/PB 20-DIP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 18 |
| 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： | 通孔 |
| 封装/外壳： | 20-DIP（0.300"，7.62mm） |
| 供应商设备封装： | 20-PDIP |
| 包装： | 管件 |
DS1802
10 of 17
CASCADE OPERATION
A feature of the DS1802 is the ability to control multiple devices from a single processor. Multiple
DS1802s can be linked or daisy-chained as shown in Figure 7. As a bit is entered in to the I/O shift
registeroftheDS1802 it will appear at the COUT out put after a maximum delay of 50 nanoseconds.
The COUT output of the DS1802 can be used to drive the D input of another DS1802. When connecting
multiple devices, the total number of bits sent is always 16 times the number of DS1802s in the daisy
chain.
An optional feedback resistor can be placed between the COUT terminal of the last device and the D input
of the first DS1802, thus allowing the controlling processor to circularly clock data through the daisy
chain. The value of the feedback or isolation resistor should be in the range from 2 k
to 10 k.
When reading data via the COUT pin and isolation resistor, the D line is left floating by the reading device.
When RST is driven high, bit 0 is present on the COUT pin, which is fed back to the input D pin through
the isolation resistor. When the CLK input transitions low to high, bit 0 is loaded into the first position of
the I/O shift register and bit 1 becomes present on COUT and D of the next device. After 16 bits (or 16
times the number of DS1802s in the daisy chain), the data has shifted completely around and back to its
original position. When RST transitions to the low state to end data transfer, the value (the same as before
the read occurred) is loaded into the wiper-0 and wiper-1.
CASCADING MULTIPLE DEVICES Figure 7
Zero-Crossing Detection
The DS1802 provides a zero-crossing detection capability when using the 3-Wire Serial interface. Zero-
crossing detection provides a means for minimizing any audible noise that may result from sizable
discrete wiper transitions when using the part in audio applications. The zero-crossing detect feature
allows independent wiper changes only when the two terminals of the potentiometer have equal potentials
and within a 50 ms time window from the fall of the RST signal. If at 50 ms the DS1802 has not detected
a zero-crossing, the wiper position of the potentiometer(s) will change regardless of the state of the input
signal. Zero-crossing detection is activated when the ZCEN input level is in a low state. When high, the
ZCEN
input deactivates both the 50 ms time requirement and zero-crossing detection.
Zero-crossing detection is also available when using the part in pushbutton operation. When a pushbutton
is activated, the part will change wiper position during the first detected zero-crossing or at the end of a
50 ms time window.
When operating in pushbutton operation with a continuous input pulse, the wiper position will change
once during the initial 1-second time period. This change is dictated by a detected zero-crossing or 50 ms
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1802+ | 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 |
| DS1802E | 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 |
| DS1802E/T&R | 制造商:Maxim Integrated Products 功能描述:DUAL AUDIO TAPER W/PB TSSOP T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC POT DL AUDIO TAP W/PB 20TSSOP |
| DS1802E/T&R | 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 |
| DS1802E+ | 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 |
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