Rainbow-electronics DS1802 Manual de usuario Pagina 1

1 of 17 051401 FEATURES § Ultra-low power consumption § Operates from 3V or 5V supplies § Two digitally controlled, 65-position potent

DS1802 10 of 17 CASCADE OPERATION A feature of the DS1802 is the ability to control multiple devices from a single processor. Multiple DS1802s can be

DS1802 11 of 17 time window. Subsequent changes when operating with continuous input pulse occur on 100 ms time intervals and are dependent on zero-c

DS1802 12 of 17 TYPICAL SUPPLY CURRENT VS. SERIAL CLOCK RATE Figure 8

DS1802 13 of 17 ABSOLUTE MAXIMUM RATINGS* Voltage on Any Pin Relative to Ground -0.7V to +7.0V Operating Temperature -40° to +85°C Storage Temperat

DS1802 14 of 17 ANALOG RESISTOR CHARACTERISTICS (-40°C to +85°C;VCC=2.7V to 5.5V) PARAMETER SYMBOL MIN TYP MAX UNITS NOTES End to End Resistor To

DS1802 15 of 17 AC ELECTRICAL CHARACTERISTICS (-40°C to +85°C; VCC=2.7V to 5.5V) PARAMETER SYMBOL MIN TYP MAX UNITS NOTES CLK Frequency fCLK DC

DS1802 16 of 17 7. Tap-to-tap tolerance is used to determine the change in voltage between successive tap positions. The DS1802 is specified for ±0.2

DS1802 17 of 17 INTERNAL GROUND CONNECTIONS Figure 10 NOTE: GND and AGND must be tied to the same voltage level.

DS1802 2 of 17 DESCRIPTION The DS1802 is a dual audio taper-potentiometer having logarithmic resistive characteristics over the device range. E

DS1802 3 of 17 DS1802 BLOCK DIAGRAM Figure 1 CONTACT CLOSURE INTERFACE CONTROL The DS1802 can be configured to operate

DS1802 4 of 17 Independent mode control allows the user to independently control each potentiometer's wiper position. For independent mode contro

DS1802 5 of 17 SINGLE PUSHBUTTON CONFIGURATION Figure 2(a) DUAL PUSHBUTTON CONFIGURATION Figure 2(b) Contact closure is defined as the transiti

DS1802 6 of 17 Pulse inputs lasting longer than 1 second will cause the wiper to move one position every 100 ms following the initial 1 second hold ti

DS1802 7 of 17 DS1802 BALANCING EXAMPLE Figure 3 CONTACT CLOSURE TIMING (UC, DC) Figure 4 Dual Contact Closure In dual pushbutton mode, each dire

DS1802 8 of 17 All contact closure control inputs, UC0, UC1, DC0, DC1, VU, VD, B0 and B1 are internally pulled up by a 50 kO resistance. The UC0, UC1,

DS1802 9 of 17 16-BIT I/O SHIFT REGISTER Figure 5 TIMING DIAGRAMS Figure 6