ADM223/ADM230L–ADM241L
+5V INPUT
1µF
6.3V
7 C1+
9 C1–
10 C2+
11 C2–
4
3
+5V TO +10V
VOLTAGE
DOUBLER
+10V TO –10V
VOLTAGE
INVERTER
V
CC
V+
6
8
1µF
6.3V
1µF
T1
OUT
T2
OUT
T2
IN
T1
IN
GND
V
CC
C1+
V+
1
2
3
4
5
6
7
8
16
15
14
T3
OUT
T4
OUT
T4
IN
T3
IN
V–
C2–
C2+
C1–
T4
IN
TTL/CMOS
INPUTS
*
T2
IN
1µF
16V
V– 12
1µF
16V
ADM234L
TOP VIEW
(Not to Scale)
13
12
11
10
9
T1
IN
T1
1
T1
OUT
T2
OUT
RS-232
OUTPUTS
T3
OUT
T4
OUT
T2
T3
2
T3
IN
13
16
15
14
GND
5
T4
ADM234L
*
INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT
Figure 9. ADM234L DIP/SOIC Pin Configuration
Figure 10. ADM234L Typical Operating Circuit
+5V INPUT
1µF
12
V
CC
T1
IN
8
T1
T2
3
T1
OUT
T2
OUT
T3
OUT
T4
OUT
RS-232
OUTPUTS
T4
OUT
T3
OUT
T1
OUT
T2
OUT
R2
IN
R2
OUT
T2
IN
T1
IN
R1
OUT
1
2
3
4
5
6
7
8
9
24
23
22
R3
IN
R3
OUT
T5
IN
TTL/CMOS
INPUTS
*
T2
IN
T3
IN
T4
IN
7
4
2
1
15
16
T3
21 SD
20
EN
T4
ADM235L
TOP VIEW
(Not to Scale)
T5
IN
22
9
T5
R1
19
10
T5
OUT
R1
IN
R2
IN
R3
IN
R4
IN
RS-232
INPUTS
**
19
18
17
16
15
14
13
T5
OUT
R4
IN
R4
OUT
T4
IN
T3
IN
R5
OUT
R5
IN
TTL/CMOS
OUTPUTS
R1
OUT
R2
OUT
R3
OUT
R4
OUT
6
R2
5
R1
IN
10
GND 11
V
CC
12
23
17
R3
R4
24
18
R5
OUT
14
R5
13
21
R5
IN
EN
20
GND
11
ADM235L
SD
Figure 11. ADM235L DIP Pin Configuration
*
INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT
**INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
Figure 12. ADM235L Typical Operating Circuit
–6–
REV. 0
AD [ ANALOG DEVICES ]
