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參數(shù)資料
| 型號： | DS1802 |
| 元件分類： | 數(shù)字電位計(jì) |
| 英文描述： | Dual Audio Taper Potentiometer With Pushbutton Control |
| 文件頁數(shù)： | 11/17頁 |
| 文件大?。?/td> | 291K |
| 代理商： | DS1802 |
DS1802
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time window. Subsequent changes when operating with continuous input pulse occur on 100 ms time
intervals and are dependent on zero-crossing or 50 ms timeouts.
MUTE CONTROL
The DS1802 provides a mute control feature which can be accessed by the user through hardware or
software. Hardware control of the device is achieved through the MUTE input pin. This pin is internally
pulled up through a 50 k
resistor. When this input is driven low, the wiper outputs of both
potentiometers will be internally connected to the low terminal of their respective potentiometers. This
input performs as a toggle input, with the first activity on this pin connecting the wiper outputs to the low
end of the resistive array on each potentiometer. The next input activity on this pin will return the wiper
position to the previous state before the muting occurred. Also, if operating in pushbutton mode, mute
will be deactivated if an input is received over the VU, VD, UC0, UC1, DC0, DC1 inputs. This input, like
the pushbutton inputs, is internally debounced and requires no external circuitry. When the device
powers up, the first activity on the mute pin will internally connect the wipers to the low end of the
resistor array.
Software mute control was briefly discussed in 3-wire protocol and operation. Bits 6 and 14 of the 16-bit
I/O shift register are reserved for mute control of potentiometer-0 and potentiometer-1, respectively.
Unlike hardware mute control, software muting allows the user individual control of each potentiometer
(i.e., potentiometer-0 and potentiometer-1 can be independently muted). Software muting of
potentiometer-0 would require bit 6 to have a value of 1 while for potentiometer-1, bit 14 should have a
value 1. When the user desires to release the mute of any potentiometer through software the complete
16-bit I/O shift register must be rewritten with the desired potentiometer wiper settings and bits 6 and 14
having 0 value.
3-Wire Serial Port Vs. Pushbutton
Operation
In applications where both the 3-wire serial port and the pushbutton inputs will be used to control the
part, there may be times when activity is present on both control interfaces simultaneously. This section
describes how the DS1802 handles these situations.
In all instances, the DS1802 3-wire serial port takes precedence over pushbutton input control.
The DS1802 will not allow pushbutton inputs to change wiper position during 3-wire serial port activity.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1802+ | 功能描述:數(shù)字電位計(jì) IC Dual Audio Taper Potentiometer 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 |
| DS1802E | 功能描述:數(shù)字電位計(jì) IC 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 |
| 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:數(shù)字電位計(jì) IC 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 |
| DS1802E+ | 功能描述:數(shù)字電位計(jì) IC Dual Audio Taper Potentiometer 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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