Datasheet

MAX3250
±50V Isolated, 3.0V to 5.5V,
250kbps, 2 TX/2 RX, RS-232 Transceiver
4 _______________________________________________________________________________________
Typical Operating Characteristics
(V
CC
= 3.3V, 250kbps data rate, see Typical Operating Circuit and Table 1 for capacitor values, all transmitters loaded with 3kΩ and
C
L
to ISOCOM, T
A
= +25°C, unless otherwise noted.)
MAX3250 toc05
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
603510-15
-200
-100
0
100
200
300
400
-300
-40 85
SHUTDOWN CURRENT
vs. TEMPERATURE
ISOCOM = -50V
ISOCOM = 0V
ISOCOM = +50V
TIME TO EXIT SHUTDOWN
V
ISOCOM
= 0V
TOUT
5V/div
MAX3250 toc04
100µs/div
SHDN
5V/div
MAX3250 toc03
LOAD CAPACITANCE (pF)
SUPPLY CURRENT (mA)
4000300020001000
10
20
30
40
50
60
70
80
90
0
0 5000
T1 TRANSMITTING AT 250kbps
T2 TRANSMITTING AT 20kbps
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE
250kbps
120kbps
20kbps
MAX3250 toc02
LOAD CAPACITANCE (pF)
SLEW RATE (V/µs)
4000300020001000
5
10
15
20
25
30
0
0 5000
SLEW RATE
vs. LOAD CAPACITANCE
-SLEW
+SLEW
FOR DATA RATES UP TO 250kbps
MAX3250 toc01
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
4000300020001000
-4
-2
0
2
4
6
8
-6
0 5000
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
V
OUT+
V
OUT-
T1 TRANSMITTING AT 250kbps
T2 TRANSMITTING AT 20kbps
COMMON-MODE FAULT RESPONSE
ISOCOM
50V/div
MAX3250 toc07
FAULT
5V/div
4ms/div
PEAK GROUND OFFSET VOLTAGE
vs. FREQUENCY
MAX3250 toc06
FREQUENCY (Hz)
PEAK GROUND OFFSET (±V)
300100 200 400 500
10
20
30
40
50
60
0
0600
V
CC
= 3.3V
V
CC
= 5V