MAX14945 Datasheet, PDF (10/21 Pages) Maxim Integrated Products – 2.75kVRMS Isolated 500kbps Half-Duplex RS-485

MAX14945
2.75kV_RMS Isolated 500kbps Half-Duplex RS-485/
RS-422 Transceiver with ±30kV ESD Protection
Typical Operating Characteristics
(VDDA – VGNDA = 3.3V, VDDB – VGNDB = 5V, VGNDA = VGNDB, and TA = +25°C, unless otherwise noted.)
V_DDA SUPPLY CURRENT
vs. TEMPERATURE
8
toc01
7
6
5
4
3
2
1
NO LOAD
NO SWITCHING
0
-45 -30 -15 0 15 30 45 60 75 90
TEMPERATURE (°C)
RECEIVER OUTPUT CURRENT
30
vs OUTPUT HIGH VOLTAGE _toc04
25
20
15
10
5
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
OUTPUT HIGH VOLTAGE (V)
DRIVER OUTPUT CURRENT
20
vs OUTPUT HIGH VOLTAGE _toc07
0
-20
-40
-60
-80
-100
-120
-7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5
OUTPUT HIGH VOLTAGE (V)
V_DDB SUPPLY CURRENT
vs. TEMPERATURE
14
toc02
12
10
8
6
4
2
NO LOAD
NO SWITCHING
0
-45 -30 -15 0 15 30 45 60 75 90
TEMPERATURE (°C)
DIFFERENTIAL OUTPUT VOLTAGE
vs. TEMPERATURE
5.5
toc05
5.0
No load
4.5
4.0
3.5
3.0
120Ω LOAD
2.5
2.0
54Ω LOAD
1.5
1.0
0.5
0.0
-45 -30 -15 0 15 30 45 60 75 90
TEMPERATURE (°C)
TRANSMITTER PROPAGATION
1000
DELAY vs. TEMPERATURE _toc08
900
800
700
600
t_PDHL
500
400
300
200
t_PDLH
R_L = 54Ω
100
C_L = 50pF
0
-45 -30 -15 0 15 30 45 60 75 90
TEMPERATURE (°C)
RECEIVER OUTPUT CURRENT
30
vs OUTPUT LOW VOLTAGE _toc03
25
20
15
10
5
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
OUTPUT LOW VOLTAGE (V)
DRIVER OUTPUT CURRENT
140
vs OUTPUT LOW VOLTAGE _toc06
120
100
80
60
40
20
0
0 1 2 3 4 5 6 7 8 9 10 11 12
OUTPUT LOW VOLTAGE (V)
RECEIVER PROPAGATION
240
DELAY vs. TEMPERATURE _toc09
220
C_L = 15pF
200
180
160
140
t_RPLH
120
100
80
60
40
t_RPHL
20
0
-45 -30 -15 0 15 30 45 60 75 90
TEMPERATURE (°C)
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