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DS1666

更新时间： 2024-11-28 22:50:47
品牌 Logo 应用领域
达拉斯 - DALLAS /
页数 文件大小 规格书
7页 54K
描述
Audio Digital Resistor

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中文翻译

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DS1666 数据手册

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DS1666, DS1666S  
DS1666, DS1666S  
Audio Digital Resistor  
FEATURES  
PIN ASSIGNMENT  
• 128 position, digitally controlled potentiometer  
NC  
U/D  
INC  
CS  
1
2
3
4
5
6
7
14  
13  
12  
11  
10  
9
NC  
• Operates from a +5 volts power supply with TTL sig-  
V
V
V
V
V
CC  
B
nal inputs  
• Wide analog voltage range of ±5 volts  
W
H
GND  
NC  
• Resistive elements are temperature compensated to  
±20 percent end to end  
L
NC  
8
NC  
• Low–power CMOS  
14–PIN DIP (300 MIL)  
See Mech. Drawings Section  
• 14–pinDIPor16–pinSOICforsurfacemountapplica-  
U/D  
NC  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
V
CC  
tions  
NC  
NC  
V
B
• Default position on power up sets wiper position at  
10%  
INC  
NC  
V
V
W
H
CS  
NC  
NC  
• Operating temperature range  
NC  
–
–40°C to +85°C; industrial  
GND  
V
L
16–PIN SOIC (300 MIL)  
See Mech. Drawings Section  
Resolution/Step  
Resistance values Low End High End –3dB Point  
DS1666–10 10KΩ  
DS1666–50 50KΩ  
DS1666–100100KΩ 243Ω  
24Ω  
122Ω  
152Ω  
759Ω  
1.519KΩ 100 KHz  
1.1 MHz  
200 KHz  
PIN DESCRIPTION  
V
V
V
–
–
–
–
–
–
–
–
–
–
High Terminal of Resistor  
Low Terminal of Resistor  
Wiper Terminal of Resistor  
Up/Down Control  
H
L
W
U/D  
INC  
CS  
Wiper Movement Control  
Chip Select for Wiper Movement  
No Connection  
NC  
V
CC  
+5 Volts  
GND  
Ground  
V
B
0 to –5 Volts  
DESCRIPTION  
The DS1666 is a solid–state potentiometer which is set  
to value by digitally controlled resistive elements. The  
potentiometer is composed of 127 resistive sections.  
Betweeneach resistive section and both ends of the po-  
tentiometerare TAP points accessible to the wiper. The  
positionofthewiperontheresistancearrayiscontrolled  
bytheCS, U/DandINCinputs. Thepositionofthewiper  
defaults to the 10% position on power up. The resolu-  
tion of the DS1666 is shown in Figure 1.  
TheDS1666DigitalAudioResistorisuniquelydesigned  
toprovideapotentiometerthatislogarithmicratherthan  
linear across its entire range. The lower half of the po-  
tentiometer advances 1% of total resistance for each  
3% of scale advanced, providing for precise amplifica-  
tion of low volume signals. The upper half of the poten-  
tiometer advances 2% of resistance for every 1% of  
scale advanced, providing for the lower resolution gain  
required for high volume amplification.  
022698 1/7  
1234567

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