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參數(shù)資料
| 型號(hào)： | DS1802 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | 數(shù)字電位計(jì) |
| 英文描述： | Dual Audio Taper Potentiometer with Push Button Control(帶按鈕控制的雙路音頻抽頭電位器) |
| 中文描述： | DIGITAL POTENTIOMETER, 3-WIRE SERIAL CONTROL INTERFACE, 65 POSITIONS, PDIP20 |
| 封裝： | 0.300 INCH, DIP-20 |
| 文件頁(yè)數(shù)： | 3/15頁(yè) |
| 文件大?。?/td> | 97K |
| 代理商： | DS1802 |
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DS1802
022698 3/15
CONTACT CLOSURE INTERFACE CONTROL
The DS1802 can be configured to operate from contact
closure inputs sometimes referred to as push–button
control. There exist a total of four physical contact clo-
sure terminals on the device package. When combined
with the MODE input, these contact closure inputs pro-
vide a total of eight different contact closure functions.
These eight contact closure functions are listed in
Table 2.
CONTACT CLOSURE INPUTS
Table 2
CONTACT INPUT
DESCRIPTION
UC0*
Up contact potentiometer–0
UC1*
Up contact potentiometer–1
DC0*
Down contact potentiometer–0
DC1*
Down contact potentiometer–1
VU**
Volume–up
VD**
Volume–down
B0**
Balance Pot–0
B1**
Balance Pot–1
* independent mode control
** stereo mode control
The MODE input terminal is used to select the mode of
wiper control using contact closure. There exist two
modes of wiper control which include independent mode
control and stereo mode control. As shown in the pin
assignment diagram, the contact closure inputs share
pins. Input functionality is determined by the state of the
MODE input at power–up.
Independent mode control allows the user to indepen-
dently control each potentiometers wiper position. For
independent mode control, the MODE input should be in
a high state. For stereo mode control, the MODE input
should be in a low state. The input should always be tied
to a well defined logic state.
The contact closure inputs which affect independent
mode control include UC0, UC1, DC0, and DC1. As out-
lined in Table 2, the UC0 and UC1 inputs are used to
move the potentiometers wipers towards the high–end of
the potentiometer (H0, H1) terminals. And the DC0 and
DC1 inputs control movement towards the low–end ter-
minals (L0, L1). Note that UC0 and DC0 control poten-
tiometer–0 wiper movement while UC1 and DC1 control
potentiometer–1movement.
An additional feature of the contact closure interface is
the ability to control both directions of wiper movement
with only the UC0 and UC1 contact closure inputs. This
feature is referred to as single push–button operation.
Figure 2(a) and (b) illustrates both configurations for
single push–button and dual push–button operation.
Stereo Mode Control
Stereo mode control allows for the simultaneous posi-
tioning of both potentiometer wipers from a single control
input. Stereo mode control is entered when the MODE
select input is in a low state at power–up. The functional-
ity available when operating in stereo mode control
includes: 1) volume–up, 2) volume–down, 3) balance–0,
and 4) balance–1.
Volume Control Inputs
Volume–up and volume–down allow the user to move
both wipers either up or down the resistor array without
changing the relative balance or distance between the
wipers. For example, if potentiometer–0’s wiper is set at
position 28 and potentiometer–1’s wiper is set at position
20, the position distance of eight is maintained when
using either of these functions. Additionally, the balance
between both wipers is preserved if either reaches the
end of its resistor array.
Balance Control Inputs
Balance control inputs allow the user to control the dis-
tance or offset between potentiometer–0 and potentiom-
eter–1 wiper position settings. The two input controls for
balance include B0 and B1. The balance control inputs
attempt to minimize their respective wiper’s attenuation.
When the DS1802 first receives a balance control input,
the position of the wiper closest to the high end terminal,
H
X
, s stored. Wiper position movement s then governed
by this stored value.
For example, if the B0 input is used, the attenuation of
potentiometer–0will change only if it is greater than the
attenuation of potentiometer–1. The direction of move-
ment for the potentiometer–0 wiper will be towards the
high end of the resistor array. Movement of wiper–0 will
only stop once its value is equal to that of wiper–1. At this
point, continued input activity on the B0 input will cause
an increase in attenuation of potentiometer–1. Note that
if the wiper of potentiometer–1 peaks at the bottom of its
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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(chǔ)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(chǔ)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(chǔ)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(chǔ)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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