ALD4501 Advanced Linear Devices 4 of 7
TYPICAL PERFORMANCE CHARACTERISTICS (cont'd)
TYPICAL APPLICATIONS
Frequency f = 1.46/ ( R
A
+ 2R
B
) C
Duty Cycle DC = R
B
/ ( R
A
+ 2R
B
)
Timer 4 oscillates in free running mode
( 50 % Duty Cycle ) and drives the trigger
inputs of timers 1,2,3, each with indepen-
dently set time delays.
Pulse Delay td = 1.1R
C
QUAD ASTABLE MODE OPERATION
( FREE RUNNING OSCILLATOR )
QUAD MONOSTABLE MODE OPERATION
( ONE SHOT PULSE )
SYNCHRONIZED TIMING GENERATORS
V
+
INPUT 1
INPUT 2
INPUT 3
INPUT 4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
DELAY 1
DELAY 4
DELAY 3
DELAY 2
R
1
R
2
R
3
R
4
C
1
C
2
C
3
C
4
V
-
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
C
2
C
1
C
3
C
4
OUT
1
OUT
2
OUT
3
OUT
4
V
+
V
+
RA
1
RB
1
RA
2
RB
2
RA3
RB
3
RA
4
RB
4
V
-
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
17
18
19
20
R
OUT 3
OUT 2
OUT 1
C
C
C
C
R
R
R
V
+
TIMER 1
TIMER 2
TIMER 3
TIMER 4
OUTPUT SINK CURRENT (mA)
OUTPUT SINK CURRENT AS A FUNCTION
OF OUTPUT VOLTAGE
OUTPUT VOLTAGE (V)
0.01 0.02
0.05 0.1
1.00.50.2
100
50
20
5.0
2.0
1.0
0.5
0.2
0.1
10
T
A
= 25°C
V
+
= 2V
V
+
= 5V
V
+
= 12V
OUTPUT SOURCE CURRENT AS A
FUNCTION OF OUTPUT VOLTAGE
-1.0
-2.0
-5.0
-10
-20
-50
-100
-0.5
-0.5 -0.2 -0.1 -0.05 -0.02 -0.01
-0.2
-0.1
-1.0
OUTPUT VOLTAGE (V)
(REFERENCED TO V
+
)
OUTPUT SOURCE CURRENT (mA)
V
+
= 2V
V
+
= 12V
V
+
= 5V
