Datasheet

MAX9940
Signal-Line Overvoltage Protector
for Low-Voltage Devices
_______________________________________________________________________________________ 3
0
20
10
40
30
50
60
0231456
ON-RESISTANCE
vs. V
CM
MAX9940 toc01
V
CM
(V)
ON-RESISTANCE (Ω)
V
CC
= 2.5V
V
CC
= 3.3V
V
CC
= 5.5V
0
10
20
30
40
50
60
01.00.5 1.5 2.0 2.5 3.0 3.5 4.0
ON-RESISTANCE
vs. V
CM
MAX9940 toc02
V
CM
(V)
ON-RESISTANCE (Ω)
T
A
= +125°C
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
0
50
100
150
200
250
300
-50 0-25 25 50 75 100 125 150
TURN-ON/TURN-OFF TIME
vs. TEMPERATURE
MAX9940 toc03
TEMPERATURE (
°
C)
TURN-ON/TURN-OFF TIME (ns)
TURN-ON
TURN-OFF
EXT = 0 TO 10V
SQUARE WAVE
R
PULLUP
= 200
Ω
0
50
100
150
200
250
300
-50 0-25 25 50 75 100 125 150
TURN-ON/TURN-OFF TIME
vs. TEMPERATURE
MAX9940 toc04
TEMPERATURE (
°
C)
TURN-ON/TURN-OFF TIME (ns)
TURN-ON
TURN-OFF
EXT = 0 TO 16V
SQUARE WAVE
R
PULLUP
= 200
Ω
12.0
13.0
12.5
14.0
13.5
14.5
15.0
15.5
16.0
2.0 3.0 3.52.5 4.0 4.5 5.0 5.5 6.0
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9940 toc05
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
T
A
= +125°C
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
INSERTION LOSS vs. FREQUENCY
MAX9940 toc06
FREQUENCY (Hz)
INSERTION LOSS (dB)
10M1M100k10k
-6
-5
-4
-3
-2
-1
0
1
2
3
-7
1k 100M
OFF-ISOLATION
vs. FREQUENCY
MAX9940 toc07
FREQUENCY (Hz)
OFF-ISOLATION (dB)
10M1M100k10k
-100
-80
-60
-40
-20
0
-120
1k
100M
INT
500mV/div
EXT
1V/div
TIME (40
μ
s/div)
FAULT TURN-ON AND RECOVERY TIME
MAX9940 toc08
V
DD
= V
CC
= 3.3V
0
0
Typical Operating Characteristics
(V
CC
= +3.3V, R
INT_PULLUP
= 2kΩ to V
DD
, V
DD
= 3.3V, T
A
= T
MIN
to T
MAX
, unless otherwise noted.)