Rainbow-electronics DS2890 Bedienungsanleitung PDF herunterladen (Seite 26)

DS2890

26 of 28

Notes:

1. Voltage is referenced to ground.

Valid at 25

C only.

Wiper resistance is a function of operating characteristics. See section “POTENTIOMETER WIPER

RESISTANCE AND CHARGE PUMP CONSIDERATIONS” for R

WIPER

characteristics.

Absolute linearity is a measure of wiper output voltage versus expected wiper voltage as determined

by wiper position.

Relative linearity is a measure of the output deviation between successive potentiometer tap points.

DC ELECTRICAL CHARACTERISTICS

2.8V £ V

PUP

£ 6.0V, -40°C £ T

£ +85°C

PARAMETER SYMBOL MIN TYP MAX UNITS NOTES

1-Wire Input High V

2.2 V 1

1-Wire Input Low V

-0.3 0.8 V 1,2

1-Wire Output High V

PUP

6.0 V 1,3

1-Wire Output Low @ 4 mA V

0.4 V 1

1-Wire Input Leakage Current I

Input Current, Charge Pump

OFF

4.0

Input Current, charge Pump

2.0 mA 6

Notes:

1. Voltages are referenced to ground.

Under certain low voltage conditions V

ILMAX

may have to be reduced to as much as 0.5V to always

guarantee a presence pulse.

PUP

is the external 1-Wire pull-up voltage.

Input load is to ground.

Input current when an auxiliary V

supply is used and the charge pump is turned OFF.

Input current when an auxiliary V

supply is used and the charge pump is turned ON.

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