DS1666-010 Dallas Semiconductor, DS1666-010 Datasheet

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DS1666-010

Manufacturer Part Number
DS1666-010
Description
Audio Digital Resistor
Manufacturer
Dallas Semiconductor
Datasheet

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FEATURES
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.
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
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
Resistance values Low End High End –3dB Point
DS1666–10 10K
DS1666–50 50K
DS1666–100100K
20 percent end to end
– –40 C to +85 C; industrial
Resolution/Step
122
243
24
152
759
1.519K
1.1 MHz
200 KHz
100 KHz
PIN ASSIGNMENT
PIN DESCRIPTION
V
V
V
U/D
INC
CS
NC
V
GND
V
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.
H
L
W
CC
B
GND
GND
U/D
INC
NC
NC
NC
NC
CS
U/D
INC
NC
CS
NC
NC
Audio Digital Resistor
See Mech. Drawings Section
See Mech. Drawings Section
– 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
16–PIN SOIC (300 MIL)
14–PIN DIP (300 MIL)
DS1666, DS1666S
1
2
3
4
5
6
7
1
2
3
4
5
6
7
8
14
13
12
10
11
16
15
14
13
12
11
10
9
8
9
NC
V
V
V
V
V
NC
V
NC
V
V
V
NC
NC
V
CC
B
W
H
L
DS1666, DS1666S
CC
B
W
H
L
022698 1/7

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DS1666-010 Summary of contents

Page 1

... 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. DS1666, DS1666S DS1666, DS1666S Audio Digital Resistor ...

Page 2

... V is not applied. CC The DS1666 has a resistor array that resembles an au- dio taper potentiometer as shown in Figure 1 1. Since the taper is not linear, exact resistance values for each of the 128 positions of the resistor is not specified. How- ...

Page 3

... BLOCK DIAGRAM Figure 2 WIPER POSITION U/D DECODE INC 7 BIT COUNTER CS MODE SELECTION Figure 3 CS INC U DS1666, DS1666S TRANSFER LOGIC ARRAY 128 MODE WIPER UP WIPER DOWN STORE WIPER POSITION 022698 3/7 ...

Page 4

... DS1666, DS1666S ABSOLUTE MAXIMUM RATINGS* Voltage on CS, INC, U/D, and V Relative to Ground –0.5V to +7.0V CC Voltage and V Relative to Ground Voltage Operating Temperature Storage Temperature Soldering Temperature * This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied ...

Page 5

... This parameter is periodically sampled and not 100% tested. 3. Typical values are for and nominal supply voltages Wiper output open circuited. AC TEST CONDITIONS Input Pulse Levels Input Rise and Fall Times 10 ns Input Level 1.5V DS1666, DS1666S (t =– MIN TYP MAX UNITS 100 ns ...

Page 6

... DS1666, DS1666S DS1666 ORDERING INFORMATION ORDERING NUMBER PACKAGE DS1666–010 14L DIP DS1666–050 14L DIP DS1666–100 14L DIP DS1666S–010 16L SOIC (300 MIL) DS1666S–050 16L SOIC (300 MIL) DS1666S–100 16L SOIC (300 MIL) 022698 6/7 OPERATING ...

Page 7

... DATA SHEET REVISION SUMMARY The following represent the key differences between 07/26/93 and 06/18/97 version of the DS1666 data sheet. Please review this summary carefully. 1. Remove commercial temp grade reference 2. Add order info table DS1666, DS1666S 022698 7/7 ...

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