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PDF DS1666 Data sheet ( Hoja de datos )
| Número de pieza | DS1666 | |
| Descripción | Audio Digital Resistor | |
| Fabricantes | Dallas Semiconducotr | |
| Logotipo |  |
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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 10KΩ 24Ω 152Ω 1.1 MHz
DS1666–50 50KΩ 122Ω 759Ω 200 KHz
DS1666–100100KΩ 243Ω 1.519KΩ 100 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
1 page  
AC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
CS to INC Setup
INC High to U/D Change
U/D to INC Setup
INC Low Period
INC High Period
INC Inactive to CS Inactive
CS Deselect Time
tCI
tID
tDI
tIL
tIH
tIC
tCPH
AC TIMING Figure 4
CS
MIN
100
100
1
500
1
500
100
DS1666, DS1666S
(tA=–40°C to +85°C; VCC=+5V ± 10%)
TYP
MAX
UNITS NOTES
ns
ns
µs
ns
µs
ns
ns
tCI
INC
U/D
tIL
tIH
tIC
tID
tDI
tCPH
tIW
VW VVH
VVL
NOTES:
1. All voltages are referenced to ground.
2. This parameter is periodically sampled and not 100% tested.
3. Typical values are for tA = 25°C and nominal supply voltages.
4. Wiper output open circuited.
AC TEST CONDITIONS
Input Pulse Levels
Input Rise and Fall Times
Input Level
0V to 3V
10 ns
1.5V
022698 5/7
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet DS1666.PDF ] | |
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