DS1806

DS1806 Digital Sextet Potentiometer www.dalsemi.com 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 ASSIGNMENT W1 W2 L1-3 W3 W4 L4-6 W6 RST CLK GND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VCC H1 H2 H3 H4 H5 W5 H6 DIN COUT PIN DESCIPTION VCC RST DIN CLK COUT H1 - H6 W1 - W6 GND L1-3 L4-6 - 3V or 5V Supply Serial Port Reset Input Serial Port Data Input Serial Port Clock Input Cascade Data Output High End terminal of Pot Wiper Terminal of Pot Ground Low Terminal Pots 1 through 3 Low Terminal Pots 4 through 6 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 ter...