ADM231L–ADM234L/ADM236L–ADM241L
+5V INPUT
1µF
+5V INPUT
+5V TO +10V
VOLTAGE
DOUBLER
V
C1+
C1–
C2+
C2–
CC
1µF
1µF
+6.3V
1µF
+6.3V
+16V
V
CC
V+
V–
+12V TO –12V
VOLTAGE
INVERTER
C1+
C1–
1µF
+16V
+7.5V TO +13.2V
INPUT
+10V TO –10V
VOLTAGE
INVERTER
V+
V–
1µF
+16V
1µF
+16V
1µF
+16V
T1
IN
T1
T1
T2
T3
OUT
T1
IN
T1
T1
T2
OUT
T2
IN
T2
OUT
TTL/CMOS
INPUTS
RS-232
OUTPUTS
1
TTL/CMOS
INPUTS
RS-232
OUTPUTS
T2
IN
T2
1
OUT
T3
IN
T3
OUT
T3
IN
T3
OUT
T3
R1
R2
T4
IN
T4
R1
T4
OUT
R1
R1
R2
R3
R4
R5
OUT
OUT
OUT
OUT
IN
IN
IN
IN
IN
R1
R1
IN
OUT
OUT
OUT
OUT
R2
R3
R4
R5
R2
R3
R4
R5
R2
IN
R2
TTL/CMOS
OUTPUTS
RS-232
INPUTS
TTL/CMOS
OUTPUTS
RS-232
INPUTS
R3
R4
2
R3
IN
R3
R4
R5
2
R4
IN
R5
OUT
EN
R5
IN
OUT
EN
NC
ADM241L
GND
SD
GND
ADM239L
1
2
INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
1
INTERNAL 400kΩ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
2
Figure 24. ADM239L Typical Operating Circuit
Figure 25. ADM241L Typical Operating Circuit
Rev. C | Page 11 of 20
ADI [ ADI ]
