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參數(shù)資料
| 型號： | DS1800 |
| 英文描述： | Dual Inverting Log Gain/Attenuator |
| 中文描述： | 雙反向登錄增益/衰減器 |
| 文件頁數(shù)： | 4/14頁 |
| 文件大?。?/td> | 428K |
| 代理商： | DS1800 |
DS1800
4
of
14
3-WIRE SERIAL INTERFACE CONTROL
CPU control of the DS1800 is accomplished using the 3-wire serial port of the device. This interface
drives an internal control logic unit. Direct wiper positioning is accomplished by using this port which
consist of three input signals:
RST
, CLK, and D.
The
RST
control signal is used to enable 3-wire serial port write operations. The CLK terminal is an input
that provides synchronization for data I/O. Data is input bit by bit via the D input signal pin.
The 3-wire serial timing diagrams are provided in Figure 5. Serial port operation or activity begins with
the transition of the
RST
signal from a low state to a high state. Once activated, data is clocked into the
part on the low to high transition of the CLK signal input. Data input via the D terminal is transferred in
order of the desired potentiometer-0 wiper value, followed by the potentiometer-1 wiper position value.
Two 8-bit values are used to store wiper position for each potentiometer during powered conditions.
These 8-bit values are written to a 16-bit I/O shift register. A detailed diagram of the 16-bit I/O shift
register is shown in Figure 6.
Bits 0 through 7 are reserved for the positioning of wiper-0 while bits 8 through 15 are reserved for
control of wiper-1. Bits 0 through 6 are used for actual wiper positioning of potentiometer-0. Bit 7 is used
to mute potentiometer-0. If this bit is set to a 1, the potentiometer-0 wiper will be connected to the OUT0
end of the resistor array regardless of the settings of bits 0 through 6.
Bits 8 through 15 are used for positioning the wiper of potentiometer-1. Bits 8 through 14 control wiper
position on the resistor array. Bit 15 is used for muting potentiometer-1.
will mute potentiometer 1, regardless of the settings of bits 8 through 14.
Bit 15, like bit 7, when set to 1
Data 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 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.
PUSHBUTTON INTERFACE CONTROL
The DS1800 can be configured to operate from contact closure or pushbutton inputs. The pushbutton
inputs consist of signals P0A, P0G, P1A, P1G and MUTE. P0A and P0G allow attenuation and gain
control of the input signal to potentiometer-0, while P1A and P1G provide the same control for
potentiometer-1. The MUTE input provides a toggle control for muting the potentiometers via
pushbutton.
The P0A and P1A control inputs, based on the recommended circuit configuration, are used to attenuate
the incoming signal by moving the wiper position towards the OUTx terminals. The P0G and P1G control
inputs provide the opposite function; positioning the wiper(s) closer to the INx terminals, thus providing
gain.
Each of these control inputs is internally pulled up via a 50 k
=
resistance. Additionally, these inputs
require no external components for debouncing or timing which are provided internal to the part.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1800-3 | 功能描述:線性和開關(guān)式電源 12V output, 1800W 1U x 4.2" x 11" RoHS:否 制造商:TDK-Lambda 產(chǎn)品:Switching Supplies 開放式框架/封閉式:Enclosed 輸出功率額定值:800 W 輸入電壓:85 VAC to 265 VAC 輸出端數(shù)量:1 輸出電壓（通道 1）:20 V 輸出電流（通道 1）:40 A 商用/醫(yī)用: 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:Rack 長度: 寬度: 高度: |
| DS1801 | 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 |
| DS1801+ | 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 |
| DS1801E | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Dual Audio Taper Potentiometer |
| DS1801E-014 | 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 |
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