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DS1666 Datasheet

  • DS1666

  • Audio Digital Resistor

  • 132.09KB

  • Dallas   Dallas

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DS1666, DS1666S
DS1666, DS1666S
Audio Digital Resistor
FEATURES
PIN ASSIGNMENT
NC
U/D
INC
CS
GND
NC
NC
1
2
3
4
5
6
7
14
13
12
11
10
9
8
NC
V
CC
V
B
V
W
V
H
V
L
NC
鈥?/div>
128 position, digitally controlled potentiometer
鈥?/div>
Operates from a +5 volts power supply with TTL sig-
nal inputs
鈥?/div>
Wide analog voltage range of
鹵5
volts
鈥?/div>
Resistive elements are temperature compensated to
鹵20
percent end to end
鈥?/div>
Low鈥損ower CMOS
鈥?/div>
14鈥損in DIP or 16鈥損in SOIC for surface mount applica-
tions
14鈥揚(yáng)IN 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
15
14
13
12
11
10
9
V
CC
NC
V
B
V
W
V
H
NC
NC
V
L
鈥?/div>
Default position on power up sets wiper position at
10%
鈥?/div>
Operating temperature range
鈥?鈥?0擄C to +85擄C; industrial
Resolution/Step
Resistance values Low End High End 鈥?dB Point
DS1666鈥?0 10K鈩?/div>
24鈩?/div>
152鈩?/div>
1.1 MHz
DS1666鈥?0 50K鈩?/div>
122鈩?/div>
759鈩?/div>
200 KHz
DS1666鈥?00100K鈩?243鈩?/div>
1.519K鈩?100 KHz
16鈥揚(yáng)IN SOIC (300 MIL)
See Mech. Drawings Section
PIN DESCRIPTION
V
H
V
L
V
W
U/D
INC
CS
NC
V
CC
GND
V
B
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
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 鈥? Volts
DESCRIPTION
The DS1666 is a solid鈥搒tate 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.
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 PDF文件相關(guān)型號(hào)

DS1666S

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