Rainbow Electronics DS1806 - Manual

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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
Ω
- DS1806-050 50 k
Ω
- DS1806-100 100 k
Ω
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
- Cascade Data Output
H1 - H6 - 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
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.
DS1806
Digital Sextet Potentiometer
www.dalsemi.com
W1 1 20 V
CC
W2 2 19 H1
L1-3 3 18 H2
W3 4 17 H3
W4 5 16 H4
L4-6 6 15 H5
W6 7 14 W5
RST 8 13 H6
CLK 9 12 D
IN
GND 10 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