MAX14890E Datasheet, PDF (11/30 Pages) Maxim Integrated Products – Overvoltage and Undervoltage Fault Detection

MAX14890E
Incremental Encoder Interface for RS-422,
HTL, and TTL with Digital Inputs
Typical Operating Characteristics
(VCC = 5V, VL = 3.3V, TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT
14
vs. DATARATE
to c 01
12
RS-422 MODE
D-HTL MODE
10
8
RxA and RxB switching, all other
inputs are low
6
0.1
1
10
DATA RATE (Mbps)
RS-422 AND TTL MODE PROPAGATION
70
DELAY vs. TEMPERATURE _toc04
60
50
TTL, t_PHL
TTL, t_PLH
40
30
RS-422, t_PHL
20
10
RS-422, t_PLH
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
RxY/RxZ DI MODE PROPAGATION
300
DELAY vs. TEMPERATURE _toc07
250
t_PLH
200
150
100
t_PHL
50
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
RS-422 RECEIVER DIFFERENTIAL
THRESHOLD VOLTAGE
200
vs. COMMON MODE VOLTAGE toc02
150
100
50
HIGH
0
-50
LOW
-100
-150
-200
-20 -15 -10 -5 0 5 10 15 20
COMMON MODE VOLTAGE (V)
D-HTL MODE PROPAGATION DELAY
100
vs. TEMPERATURE
to c 05
90
80
70
60
50
t_PLH
40
t_PHL
30
20
10
0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
DI2/DI3 DI MODE PROPAGATION
3.0
DELAY vs. TEMPERATURE _toc08
2.5
2.0
t_PLH
1.5
t_PHL
1.0
0.5
0.0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
1000
800
600
400
200
0
-200
-400
-600
-800
-1000
0
D-HTL RECEIVER DIFFERENTIAL
THRESHOLD VOLTAGE
vs. COMMON MODE VOLTAGE toc03
HIGH
LOW
5
10
15
20
25
COMMON MODE VOLTAGE (V)
SE-HTL MODE PROPAGATION DELAY
100
vs. TEMPERATURE
to c 06
90
80
70
60
HITH = GND, t_PLH
50
HITH = VL, t_PLH
40
30
20
10
HITH = GND, t_PHL
0
-40 -25 -10 5 20 35
HITH = VL, t_PHL
50 65 80 95 110 125
TEMPERATURE (°C)
DI INPUT CURRENT
40
vs. INPUT VOLTAGE
to c 09
30
20
10
0
-10
-20
-30
-40
-0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0
DI INPUT CURRENT (mA)
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