ADM202/ADM203

REV. 0

–3–

PIN CONFIGURATIONS

DIP/SOIC

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

Top View

(Not to Scale)

ADM202

V+

GND

V–

C1+

C1–

C2–

C2+

DIP

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

Top View

(Not to Scale)

ADM203

V+

V–

C1+

C2–

C2+

C1–

GND

GND

C2+

C2–

V–

0.1µF

6.3V

0.1µF

6.3V

0.1µF

16V

0.1µF

6.3V

+5V TO +10V

VOLTAGE

DOUBLER

+10V TO –10V

VOLTAGE

INVERTER

0.1µF

16V

+5V INPUT

V+

V–

C1+

C1–

C2+

C2–

ADM202

6

GND

15

4

5

3

1

2

RS-232

OUTPUTS

TTL/CMOS

INPUTS

*

R1

R2

T2

T1

TTL/CMOS

OUTPUTS

RS-232

INPUTS

**

13

10

7

11

8

14

9

12

16

**INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT

+5V INPUT

V+

V–

C1+

C1–

C2+

C2–

GND

ADM203

7

RS-232

OUTPUTS

TTL/CMOS

INPUTS

*

R1

R2

T2

T1

TTL/CMOS

OUTPUTS

RS-232

INPUTS

**

4

1

18

2

19

5

20

3

8

13

12

17

14

11

15

10

16

V–

C2–

C2+

9

6

GND

DO NOT MAKE

CONNECTIONS TO

THESE PINS

INTERNAL

–10V POWER

SUPPLY

INTERNAL

+10V POWER

SUPPLY

Figure 1. Typical Operating Circuits

PIN FUNCTION DESCRIPTION

Mnemonic

Function

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.

Transmitter (Driver) Inputs. These inputs accept TTL/CMOS levels. An internal 400 k

Ω pull-up resistor to V

connected on each input.

Transmitter (Driver) Outputs. These are RS-232 levels (typically

±10 V).