DS1806 Datasheet, PDF (1/8 Pages) Dallas Semiconductor – Digital Sextet Potentiometer

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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 kΩ
- DS1806-050 50 kΩ
- DS1806-100 100 kΩ
§ Operating Temperature Range:
- Industrial temperature: -40°C to +85°C
PIN DESCIPTION
V_CC
- 3V or 5V Supply
RST
- Serial Port Reset Input
D_IN
- Serial Port Data Input
CLK
- Serial Port Clock Input
C_OUT
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 1
W2 2
L1-3 3
W3 4
W4 5
L4-6 6
W6 7
RST 8
CLK 9
GND 10
20
V_CC
19 H1
18 H2
17 H3
16 H4
15 H5
14 W5
13 H6
12
D_IN
11
C_OUT
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, H_X, the wiper terminals, W_X, 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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