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DS1802 の電気的特性と機能

DS1802のメーカーはDallas Semiconducotrです、この部品の機能は「Dual Audio Taper Potentiometer With Pushbutton Control」です。


製品の詳細 ( Datasheet PDF )

部品番号 DS1802
部品説明 Dual Audio Taper Potentiometer With Pushbutton Control
メーカ Dallas Semiconducotr
ロゴ Dallas Semiconducotr ロゴ 




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DS1802 Datasheet, DS1802 PDF,ピン配置, 機能
www.dalsemi.com
DS1802
Dual Audio Taper Potentiometer
With Pushbutton Control
FEATURES
§ Ultra-low power consumption
§ Operates from 3V or 5V supplies
§ Two digitally controlled, 65-position
potentiometers including mute
§ Logarithmic resistive characteristics (1 dB
per step)
§ Zero-crossing detection eliminates noise
caused by wiper movement
§ Digital or mechanical pushbutton wiper
control
§ Serial port provides means for setting and
reading both potentiometers wipers
§ 20-pin SOIC and 20-pin TSSOP for surface
mount applications
§ Operating Temperature Range:
-40°C to +85°C
§ Software and hardware mute
§ Resistance Available: 45 k
PIN ASSIGNMENT
GND
COUT
CLK
D
RST
ZCEN
MODE
W0
L0
H0
1
2
3
4
5
6
7
8
9
10
20 VCC
19 VU (UC1)
18 VD (DC1)
17 B0 (UC0)
16 B1 (DC0)
15 MUTE
14 AGND
13 H1
12 L1
11 W1
20-Pin DIP (300-mil)
20-Pin SOIC (300-mil)
20-Pin TSSOP (173-mil)
See Mech. Drawings Section
PIN DESCRIPTION
L0, L1
H0, H1
W1,W2
VCC
- Low End of Resistor
- High End of Resistor
- Wiper End of Resistor
- 3V/5V Power Supply Input
RST
D
CLK
MODE
UC0, UC1
DC0, DC1
VU, VD
B0, B1
GND
MUTE
AGND
- Serial Port Reset Input
- Serial Port Data Input
- Serial Port Clock Input
- Mode Select Input
- Up Control Pushbutton Inputs
- Down Control Pushbutton
Inputs
- Volume-Up/Volume-Down
Inputs
- Balance Pot-0, Pot-1 Inputs
- Digital Ground
- Mute
- Analog Ground
ZCEN
COUT
- Zero-Crossing Detect Input
- Cascade Output
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DS1802 pdf, ピン配列
DS1802 BLOCK DIAGRAM Figure 1
DS1802
CONTACT CLOSURE INTERFACE CONTROL
The DS1802 can be configured to operate from contact closure inputs sometimes referred to as
pushbutton control. There exists a total of four physical contact closure terminals on the device package.
When combined with the MODE input, these contact closure inputs provide 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.
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DS1802 電子部品, 半導体
DS1802
Pulse inputs lasting longer than 1 second will cause the wiper to move one position every 100 ms
following the initial 1 second hold time. The total time to transcend the entire potentiometer using a
continuous input pulse is given by the formula below:
1 (second) + 63 X 100 ms =7.3 (seconds)
Single Contact Closure
Single contact closure operation allows the user to control wiper movement in either direction from a
single pushbutton input. Figure 2(a), as mentioned, presents a typical single pushbutton configuration.
In independent mode control, the UC0 and UC1 inputs are used to increment and decrement each
respective wiper position for single pushbutton mode of operation. The DC0 and DC1 inputs provide no
functionality in the single pushbutton configuration but must be connected to the positive supply voltage
(VCC). In stereo mode control, the VU and B0 inputs are used to control volume and balance. The VD and
B1 inputs provide no functionality in the single pushbutton configuration but must be connected to the
positive supply voltage (VCC). The 3-wire serial port inputs ( RST , CLK, and D) must be grounded when
not used.
On device power-up, the configuration shown in Figure 2(a) must exist in order to enter the single contact
closure mode of operation; especially and specifically, the (DC0, DC1, VD, and B1) input’s connection to
the positive supply voltage (VCC).
The direction of wiper movement in single pushbutton operation is determined by prior activity; with the
direction of wiper movement being opposite to that of the previous activity.
Changing the direction of wiper movement in single pushbutton configuration is accomplish by a period
of inactivity on the controlling input of a (minimum) 1 second or greater. For example, when operating
from independent mode control, an inactivity of 1 second or greater on the UC0 input will cause the
direction of the potentiometer-0 wiper to reverse. The same is true for the UC1 input. Also, in
independent mode control and single pushbutton configuration, as the wiper reaches the end of the
potentiometer range its direction of movement reverses. This will occur regardless of whether the input is
a continuous pulse, a sequence of repetitive pulses or a single pulse.
In stereo mode control, the VU input is responsible for both directions of wiper movement. Again, a
period of inactivity will allow the direction of volume to be reversed. Additionally, if either wiper
reaches a peak position, the direction of movement will automatically reverse.
For balance mode control, the B0 input will be responsible for wiper movement. A period of inactivity
lasting 1 second or more will cause a switch in balance movement (i.e., balance-0 to balance-1).
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Link :


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