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DS1666 Schematic ( PDF Datasheet ) - Dallas Semiconducotr

Teilenummer DS1666
Beschreibung Audio Digital Resistor
Hersteller Dallas Semiconducotr
Logo Dallas Semiconducotr Logo 




Gesamt 7 Seiten
DS1666 Datasheet, Funktion
DS1666, DS1666S
DS1666, DS1666S
Audio Digital Resistor
FEATURES
128 position, digitally controlled potentiometer
Operates from a +5 volts power supply with TTL sig-
nal inputs
Wide analog voltage range of ±5 volts
Resistive elements are temperature compensated to
±20 percent end to end
Low–power CMOS
14–pin DIP or 16–pin SOIC for surface mount applica-
tions
Default position on power up sets wiper position at
10%
Operating temperature range
– –40°C to +85°C; industrial
Resolution/Step
Resistance values Low End High End –3dB Point
DS1666–10 10K241521.1 MHz
DS1666–50 50K122759200 KHz
DS1666–100100K2431.519K100 KHz
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.
Between each resistive section and both ends of the po-
tentiometer are TAP points accessible to the wiper. The
position of the wiper on the resistance array is controlled
by the CS, U/D and INC inputs. The position of the wiper
defaults to the 10% position on power up. The resolu-
tion of the DS1666 is shown in Figure 1.
PIN ASSIGNMENT
NC
U/D
INC
CS
GND
NC
NC
1
2
3
4
5
6
7
14 NC
13 VCC
12 VB
11 VW
10 VH
9 VL
8 NC
14–PIN DIP (300 MIL)
See Mech. Drawings Section
U/D
NC
NC
INC
NC
CS
NC
GND
1
2
3
4
5
6
7
8
16 VCC
15 NC
14 VB
13 VW
12 VH
11 NC
10 NC
9 VL
16–PIN SOIC (300 MIL)
See Mech. Drawings Section
PIN DESCRIPTION
VH
VL
VW
U/D
INC
CS
NC
VCC
GND
VB
– High Terminal of Resistor
– Low Terminal of Resistor
– Wiper Terminal of Resistor
– Up/Down Control
– Wiper Movement Control
– Chip Select for Wiper Movement
– No Connection
– +5 Volts
– Ground
– 0 to –5 Volts
The DS1666 Digital Audio Resistor is uniquely designed
to provide a potentiometer that is logarithmic rather than
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






DS1666 Datasheet, Funktion
DS1666, DS1666S
DS1666 ORDERING INFORMATION
ORDERING NUMBER
DS1666–010
DS1666–050
DS1666–100
DS1666S–010
DS1666S–050
DS1666S–100
PACKAGE
14L DIP
14L DIP
14L DIP
16L SOIC (300 MIL)
16L SOIC (300 MIL)
16L SOIC (300 MIL)
OPERATING
TEMPERATURE
–40°C TO +85°C
–40°C TO +85°C
–40°C TO +85°C
–40°C TO +85°C
–40°C TO +85°C
–40°C TO +85°C
VERSION
10K
50K
100K
10K
50K
100K
022698 6/7

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