Analog Devices ADM203JN, ADM202JRW, ADM202JRN Datasheet

High-Speed, 5 V, 0.1 ␮F

a

FEATURES
120 kB Transmission Rate
ADM202: Small (0.1 ␮F) Charge Pump Capacitors
ADM203: No External Capacitors Required
Single 5 V Power Supply
Meets EIA-232-E and V.28 Specifications
Two Drivers and Two Receivers
On-Board DC-DC Converters
ⴞ9 V Output Swing with 5 V Supply
Low Power BiCMOS: 2.0 mA I
ⴞ30 V Receiver Input Levels

APPLICATIONS
Computers
Peripherals
Modems
Printers
Instruments

GENERAL DESCRIPTION

The ADM202/ADM203 is a two-channel RS-232 line driver/
receiver pair designed to operate from a single 5 V power sup­ply. A highly efficient on-chip charge pump design permits
RS-232 levels to be developed using charge pump capacitors as
small as 0.1 µF. The capacitors are internal to the package on
the ADM203 so no external capacitors are required. These
converters generate ±10 V RS-232 output levels.

The ADM202/ADM203 meets or exceeds the EIA-232-E and
V.28 specifications. Fast driver slew rates permit operation up to
120 kB while high-drive currents allow for extended cable lengths.

An epitaxial BiCMOS construction minimizes power consump­tion to 10 mW and also guards against latch-up. Overvoltage
protection is provided allowing the receiver inputs to withstand
continuous voltages in excess of ± 30 V. In addition, all pins
contain ESD protection to levels greater than 2 kV.

The ADM202 is available in 16-lead DIP and both narrow and
wide SOIC packages. The ADM203 is available in a 20-lead
DIP package.

CC

CMOS RS-232 Driver/Receivers

ADM202/ADM203

FUNCTIONAL BLOCK DIAGRAMS

5V INPUT

OUT

OUT

IN

IN

OUT

OUT

IN

IN

0.1␮F

6.3V

RS-232
OUTPUTS

RS-232
INPUTS**

RS-232
OUTPUTS

RS-232
INPUTS**

R1

R2

ADM202

CC

R1

R2

V

C2+

C2+

C2–

C2–

CC

V+

V–

C1+

C1–

C2+

C2–

GND

C1+

C1–

V–

V–

V+

+5V TO +10V

VOLTAGE
DOUBLER

+10V TO –10V

VOLTAGE
INVERTER

T1

T2

5V INPUT

V

T1

T2

ADM203

GND GND

0.1␮F

6.3V

0.1␮F
16V

T1

TTL/CMOS

INPUTS*

TTL/CMOS

OUTPUTS

TTL/CMOS

INPUTS*

TTL/CMOS

OUTPUTS

DO NOT MAKE

CONNECTIONS

TO THESE PINS

INTERNAL

–10V POWER

+10V POWER

IN

T2

IN

R1

OUT

R2

OUT

*INTERNAL 400k⍀ PULL-UP RESISTOR ON EACH TTL/ CMOS INPUT.
**INTERNAL 5k⍀ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.

T1

IN

T2

IN

R1

OUT

R2

OUT

SUPPLY

INTERNAL

SUPPLY

0.1␮F

6.3V

0.1␮F
16V

T1

T2

R1

R2

T1

T2

R1

R2

REV. A

Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.

*INTERNAL 400k⍀ PULL-UP RESISTOR ON EACH TTL/ CMOS INPUT.
**INTERNAL 5k⍀ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] World Wide Web Site: http://www.analog.com
Fax: [phone] © Analog Devices, Inc., 2001

(VCC = 5 V ⴞ 10%, (ADM202 C1–C4 = 0.1 ␮F). All Specifications
T

to T

ADM202/ADM203–SPECIFICATIONS

MIN

, unless otherwise noted)

MAX

Parameter Min Typ Max Unit Conditions/Comments

Output Voltage Swing ± 5 ± 9VV

= 5 V ± 5%, T1

CC

OUT

3 kΩ to GND

Output Voltage Swing ± 5 ± 9VV

= 5 V ± 10%, TA = 25°C, T1

CC

Loaded with 3 kΩ to GND

Power Supply Current 2.5 6.0 mA No Load, T1IN, T2IN = V

V

CC

Input Logic Threshold Low, V
Input Logic Threshold High, V

INL

INH

2.4 V T

0.8 V T

Logic Pull-Up Current 12 25 µAT

T2

IN

IN

IN

= GND

IN

= 0 V
RS-232 Input Voltage Range –30 +30 V
RS-232 Input Threshold Low 0.8 1.2 V
RS-232 Input Threshold High 1.6 2.4 V
RS-232 Input Hysteresis 0.2 0.4 1.0 V
RS-232 Input Resistance 3 5 7 kΩ T
TTL/CMOS Output Voltage Low, V
TTL/CMOS Output Voltage High, V

OL

OH

3.5 V I

0.4 V I

= 0°C to 85°C

A

= 1.6 mA

OUT

= –1.0 mA

OUT

Propagation Delay 0.3 5 µs RS-232 to TTL
Transition Region Slew Rate 8 V/µsR

= 3 kΩ, CL= 1000 pF

L

Measured from +3 V to –3 V or –3 V to +3 V
Baud Rate 120 kB R
Output Resistance 300 Ω V

= 3 kΩ, CL = 1 nF

L

= V+ = V– = 0 V, V

CC

RS-232 Output Short Circuit Current ± 10 ± 60 mA

Specifications subject to change without notice.

, T2

CC

OUT

Loaded with

OUT

OUT

or T1IN,

= ± 2 V

, T2

OUT

ABSOLUTE MAXIMUM RATINGS*

(TA = 25°C unless otherwise noted)

VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V

V+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . (V

– 0.3 V) to +14 V

CC

V– . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3 V to –14 V

Input Voltages

. . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to (VCC + 0.3 V)

T

IN

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 30 V

R

IN

Output Voltages

. . . . . . . . . . . . . . . . . . . (V+, +0.3 V) to (V–, – 0.3 V)

T

OUT

. . . . . . . . . . . . . . . . . . . . . . . –0.3 V to (VCC + 0.3 V)

R

OUT

Short Circuit Duration

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous

T

OUT

Power Dissipation

N-16 DIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 470 mW

R-16N SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600 mW

R-16W SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 mW

N-20 DIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 890 mW

Thermal Impedance

N-16 DIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135°C/W

R-16N SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105°C/W

R-16W SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105°C/W

N-20 DIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125°C/W

Operating Temperature Range

Commercial (J Version) . . . . . . . . . . . . . . . . . . 0°C to 70°C

Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C

Lead Temperature Soldering

Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . . 215°C

Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220° C

ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >2000 V

*This is a stress rating only and functional operation of the device at these or any

other conditions above those indicated in the operation sections of this specifica­tion is not implied. Exposure to absolute maximum rating conditions for extended
periods of time may affect reliability.

ORDERING GUIDE

Model Temperature Range Package Option

ADM202JN 0°C to 70°C N-16
ADM202JRN 0°C to 70°C R-16N
ADM202JRW 0°C to 70°C R-16W
ADM203JN 0°C to 70°C N-20

–2–

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