DS1809
7 of 9
AC ELECTRICAL CONDITIONS
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Single Input Pulse Width t
PW
1 DC ms 4,5,7,9
Repetitive Pulse High Time t
HPW
1
DC ms
4,5,7,8,9
Continuous Pulse t
CCP
1
DC
ms
4,5,7,8,9
Storage Control Pulse t
STR
1 μs 10,12
Capacitance C
IN
5 10 pF 10
ANALOG RESISTOR CHARACTERISTICS ELECTRICAL CONDITIONS
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
End-to-End Resistor
Tolerance
-20 +20 % 14
Absolute Linearity
-0.6 +0.6 LSB 15
Relative Linearity -0.25 +0.25 LSB 16
-3 dB Cutoff Frequency f
CUTOFF
MHz 17
Temperature Coefficient 750 PPM/º
C
14
NOTES:
1. All voltages are referenced with respect to ground.
2. Voltages across the potentiometer terminals (R
L
, R
W
, R
H
) cannot exceed V
CC
or go below ground by
0.5V.
3. Inputs UC and DC are internally pulled-up with resistance of 100 k.
4. UC and DC inputs are internally pulled-up to V
CC
via a 100 kresistor.
5. Active current is specified when the inputs UC or DC are active.
6. Standby current is the current consumed when the UC, DC, and STR inputs are inactive.
7. Input pulse width is the minimum time required for an input to cause an increment or decrement.
8. Repetitive pulse inputs on UC or DC will be recognized as long as they are within 500 milliseconds
of each other. Pulses occurring faster than 1 ms apart may not be recognized as individual and
separate pulses.
9. Input pulse timing has tolerances to ±10%.
10. Capacitance values apply at 25°C.
11. For V
CC
= 5V±10%, maximum V
IL
=+0.8V. Input logic levels are referenced to ground.
12. If not used STR should be connected to ground.
13. The DS1809 is offered in three values: 10 k, 50 k, and 100 k.
