Datasheet

REV. A
ADM202/ADM203
–3–
PIN FUNCTION DESCRIPTION
Mnemonic Function
V
CC
Power Supply Input 5 V ± 10%.
V+ Internally Generated Positive Supply (+10 V nominal).
V– Internally Generated Negative Supply (–10 V nominal).
GND Ground Pin. Must be connected to 0 V.
C1+ ADM202 External Capacitor, (+ terminal) is connected to this pin.
ADM203: The capacitor is connected internally and no external capacitor is required.
C1– ADM202 External Capacitor, (– terminal) is connected to this pin.
ADM203: The capacitor is connected internally and no external capacitor is required.
C2+ ADM202 External Capacitor, (+ terminal) is connected to this pin.
ADM203: The capacitor is connected internally and no external capacitor is required.
C2– ADM202 External Capacitor, (– terminal) is connected to this pin.
ADM203: The capacitor is connected internally and no external capacitor is required.
T
IN
Transmitter (Driver) Inputs. These inputs accept TTL/CMOS levels. An internal 400 kΩ pull-up resistor to V
CC
is
connected on each input.
T
OUT
Transmitter (Driver) Outputs. These are RS-232 levels (typically ± 10 V).
R
IN
Receiver Inputs. These inputs accept RS-232 signal levels. An internal 5 kΩ pull-down resistor to GND is
connected on each of these inputs.
R
OUT
Receiver Outputs. These are TTL/CMOS levels.
ADM202
0.1␮F
6.3V
0.1␮F
16V
C1+
C1–
C2–
C2+
T1
IN
T1
T1
OUT
T2
IN
T2
T2
OUT
TTL/CMOS
INPUTS*
RS-232
OUTPUTS
R1
OUT
R1
R1
IN
R2
OUT
R2
IN
TTL/CMOS
OUTPUTS
RS-232
INPUTS**
R2
V–
0.1␮F
16V
+10V TO –10V
VOLTAGE
INVERTER
0.1␮F
6.3V
0.1␮F
6.3V
5V INPUT
V+
V
CC
+5V TO +10V
VOLTAGE
DOUBLER
GND
T1
IN
T1
T1
OUT
T2
IN
T2
T2
OUT
TTL/CMOS
INPUTS*
RS-232
OUTPUTS
R1
OUT
R1
R1
IN
R2
OUT
R2
IN
TTL/CMOS
OUTPUTS
RS-232
INPUTS**
R2
5V INPUT
V
CC
DO NOT MAKE
CONNECTIONS
TO THESE PINS
C1+
C1–
INTERNAL
–10V POWER
SUPPLY
V–
V–
V+
INTERNAL
+10V POWER
SUPPLY
C2+
C2+
C2–
C2–
GND GND
ADM203
*INTERNAL 400k⍀ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
**INTERNAL 5k⍀ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
*INTERNAL 400k⍀ PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
**INTERNAL 5k⍀ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
Figure 1. Typical Operating Circuits
DIP/SOIC
TOP VIEW
(Not to Scale)
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
C1+
V+
C1–
C2+
C2–
V–
GND
ADM202
T2
OUT
R2
IN
V
CC
T1
OUT
R1
IN
R1
OUT
T1
IN
T2
IN
R2
OUT
DIP
TOP VIEW
(Not to Scale)
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
9
10
ADM203
T2
IN
T1
IN
R1
OUT
R1
IN
T1
OUT
GND
V
CC
C1+
GND
C2–
R2
OUT
R2
IN
T2
OUT
V–
C2–
C2+
V+
C1–
V–
C2+
PIN CONFIGURATIONS