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PDF DS1806 Data sheet ( Hoja de datos )

Número de pieza DS1806
Descripción Digital Sextet Potentiometer
Fabricantes Dallas Semiconducotr 
Logotipo Dallas Semiconducotr Logotipo



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No Preview Available ! DS1806 Hoja de datos, Descripción, Manual

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DS1806
Digital Sextet Potentiometer
FEATURES
§ Six digitally controlled 64-position
potentiometers
§ 3-wire serial port provides for reading and
setting each potentiometer
§ Devices can be cascaded for single processor
multi-device control
§ Standard resistance values:
- DS1806-010 10 k
- DS1806-050 50 k
- DS1806-100 100 k
§ Operating Temperature Range:
- Industrial temperature: -40°C to +85°C
PIN DESCIPTION
VCC - 3V or 5V Supply
RST - Serial Port Reset Input
DIN - Serial Port Data Input
CLK
- Serial Port Clock Input
COUT
H1 - H6
- Cascade Data Output
- High End terminal of Pot
W1 - W6 - Wiper Terminal of Pot
GND
- Ground
L1-3
- Low Terminal Pots 1 through 3
L4-6
- Low Terminal Pots 4 through 6
PIN ASSIGNMENT
W1
W2
L1-3
W3
W4
L4-6
W6
RST
CLK
GND
1
2
3
4
5
6
7
8
9
10
20 VCC
19 H1
18 H2
17 H3
16 H4
15 H5
14 W5
13 H6
12 DIN
11 COUT
DS1806 20-Pin DIP (300-mil)
DS1806S 20-Pin SOIC (300-mil)
DS1806E 20-Pin TSSOP (173-mil)
See Mech. Drawings Section
DESCRIPTION
The DS1806 Digital Sextet Potentiometer is a six-channel, digitally controlled, solid-state linear
potentiometer. Each potentiometer is comprised of 63 equiresistive sections as illustrated in the block
diagram of Figure 1. Each potentiometer has three terminals accessible to the user. These include the high
side terminals, HX, the wiper terminals, WX, and the low-end terminals, L1-3 and L4-6. Potentiometers 1
through 3 share the same low-end terminal L1-3; likewise, potentiometers 4 through 6 share the low-end
terminal L4-6.
Each wiper’s position is selected via an 8-bit register value. Communication and control of the device is
accomplished via a 3-wire serial port interface. This interface in conjunction with a cascade output allows
the value of the device wiper settings to be read.
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DS1806 pdf
DS1806
TYPICAL APPLICATION CONFIGURATIONS
Figure 6 shows the typical application configuration of the DS1806 as a fixed gain attenuator. In this
configuration, the DS1806 adjusts the attenuation level of the incoming signal. Variations in wiper
resistance are minimized by connecting the wiper terminal of the part to a high impedance load.
Depending on voltage across the wiper, its resistance may vary from 400 ohms to 1000 ohms. Note that
the resistance R1 in Figure 6 should be chosen to be much greater than the wiper resistance RW .
CASCADING MULTIPLE DEVICES Figure 5
FIXED GAIN ATTENUATOR Figure 6
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