DS1809
AC ELECTRICAL CONDITIONS
PARAMETER
Single Input Pulse Width
Repetitive Pulse High Time
Continuous Pulse
Storage Control Pulse
Capacitance
SYMBOL
t
PW
t
HPW
t
CCP
t
STR
C
IN
MIN
1
1
1
1
5
10
TYP
MAX
DC
DC
DC
UNITS
ms
ms
ms
碌s
pF
NOTES
4,5,7,9
4,5,7,8,9
4,5,7,8,9
10,12
10
ANALOG RESISTOR CHARACTERISTICS ELECTRICAL CONDITIONS
PARAMETER
End-to-End Resistor
Tolerance
Absolute Linearity
Relative Linearity
-3 dB Cutoff Frequency
Temperature Coefficient
f
CUTOFF
750
SYMBOL
MIN
-20
-0.6
-0.25
TYP
MAX
+20
+0.6
+0.25
UNITS
%
LSB
LSB
MHz
ppm/潞C
NOTES
14
15
16
17
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鈩?.
4. UC and DC inputs are internally pulled-up to V
CC
via a 100 k鈩?resistor.
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 鹵10%.
10. Capacitance values apply at 25擄C.
11. For V
CC
= 5V鹵10%, maximum V
IL
=+0.8V. For V
CC
= 3.0V鹵10%, maximum V
IL
=0.6V. Input logic
levels are referenced to ground.
12. If not used STR should be connected to ground.
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