Rainbow Electronics MAX9921 - Manual (Page 7)

MAX9921
Dual, 2-Wire Hall-Effect Sensor Interface
with Diagnostics
_______________________________________________________________________________________ 7
Typical Operating Characteristics (continued)
(V BAT = 14V, T A = +25°C, unless otherwise noted.)
IN_ BLANKING TIME AT HALL SWITCH
POWER-UP vs. TEMPERATURE
TEMPERATURE ( °C)
IN_ BLANKING TIME (
μ
s)
MAX9921 toc10
-40 -25 -10 5 20 35 50 65 80 95 110 125
60
65
70
75
80
85
90
95
100
IN_ CURRENT RAMP RATE AFTER
TURN-ON vs. TEMPERATURE
TEMPERATURE ( °C)
IN_ CURRENT RAMP RATE (mA/
μ
s)
MAX9921 toc11
-40 -25 -10 5 20 35 50 65 80 95 110 125
0
1
2
3
4
5
DELAY FROM IN_ TO OUT_ (FILTER DELAY)
vs. TEMPERATURE
TEMPERATURE ( °C)
DELAY (
μ
s)
MAX9921 toc12
-40 -25 -10 5 20 35 50 65 80 95 110 125
5
6
7
8
9
10
DELAY FROM IN_ FAULT TO ERR
(FILTER DELAY) vs. TEMPERATURE
TEMPERATURE ( °C)
DELAY (
μ
s)
MAX9921 toc13
-40 -25 -10 5 20 35 50 65 80 95 110 125
0
10
20
30
40
50
DELAY DIFFERENCE BETWEEN RISING
AND FALLING EDGES FOR BOTH CHANNELS
vs. TEMPERATURE
TEMPERATURE ( °C)
DELAY DIFFERENCE (ns)
MAX9921 toc14
-40 -25 -10 5 20 35 50 65 80 95 110 125
0
20
40
60
80
100
120
140
160
180
IN1 AND IN2
DELAY DIFFERENCE BETWEEN
CHANNELS vs. TEMPERATURE
TEMPERATURE ( °C)
DELAY DIFFERENCE (ns)
MAX9921 toc15
-40 -25 -10 5 20 35 50 65 80 95 110 125
0
50
100
150
200
250
MAXIMUM FREQUENCY ON HALL INPUTS
vs. TEMPERATURE
TEMPERATURE ( °C)
FREQUENCY (kHz)
MAX9921 toc16
-40 -25 -10 5 20 35 50 65 80 95 110 125
50
55
60
65
70
75
80
85
90
95
100
IN1 AND IN2, 50% DUTY CYCLE
IN_ PULSE LENGTH REJECTED BY FILTER
TO OUT_ vs. TEMPERATURE
TEMPERATURE ( °C)
PULSE LENGTH (
μ
s)
MAX9921 toc17
-40 -25 -10 5 20 35 50 65 80 95 110 125
0
1
2
3
4
5
6
7
IN1 AND IN2 WITH
NEGATIVE PULSE
IN1 AND IN2 WITH
POSITIVE PULSE
V BAT UNDERVOLTAGE THRESHOLD
vs. TEMPERATURE
TEMPERATURE ( °C)
V
BA
T
THRESHOLD (V)
MAX9921 toc18
-40 -25 -10 5 20 35 50 65 80 95 110 125
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
6.0
6.1
6.2
V BAT RISING, ERR GOES HIGH
V BAT FALLING, ERR GOES LOW