Rainbow-electronics MAX9921 Bedienungsanleitung PDF herunterladen (Seite 8)

MAX9921

Dual, 2-Wire Hall-Effect Sensor Interface

with Diagnostics

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

BAT

= 14V, T

= +25°C, unless otherwise noted.)

BAT

OVERVOLTAGE THRESHOLD

vs. TEMPERATURE

TEMPERATURE (°C)

BAT

THRESHOLD (V)

MAX9921 toc19

-40 -25 -10 5 20 35 50 65 80 95 110 125

19.5

19.6

19.7

19.8

19.9

20.0

20.1

20.2

20.3

20.4

20.5

BAT

FALLING, ERR GOES LOW

BAT

RISING, ERR GOES HIGH

INPUT PULLUP RESISTANCE

vs. V

BAT

(V)

INPUT PULLUP RESISTANCE (Ω)

MAX9921 toc20

6 9 12 15 18

= +125°C

= +25°C

= -40°C

THRESHOLD CURRENT vs. ISET RESISTOR

CHANGE IN ISET RESISTOR (%)

CHANGE IN THRESHOLD CURRENT (%)

MAX9921 toc21

-15 -10 -5 0 5 10 15

-15

-10

-5

HYSTERESIS

INPUT CURRENT FOR OUTPUT

HIGH AND INPUT CURRENT

FOR OUTPUT LOW

RESPONSE OF INPUT TO SHORT TO GROUND

MAX9921 toc22

10μs/div

IN1

10V/div

IN1

25mA/div

ERR

5V/div

STARTUP OF HALL INPUT FROM SHUTDOWN

MAX9921 toc23

20μs/div

10V/div

5V/div

10mA/div

BLANKING PERIOD

IN_

OUT_

OE_

IN_

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

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