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ADM202 Datasheet(PDF) 1 Page - Analog Devices

Part No. ADM202
Description  High-Speed, 5 V, 0.1 F CMOS RS-232 Driver/Receivers
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADM202 Datasheet(HTML) 1 Page - Analog Devices

   
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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.
a
ADM202/ADM203
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2001
FUNCTIONAL BLOCK DIAGRAMS
ADM202
0.1 F
6.3V
0.1 F
16V
C1+
C1–
C2–
C2+
T1IN
T1
T1OUT
T2IN
T2
T2OUT
TTL/CMOS
INPUTS*
RS-232
OUTPUTS
R1OUT
R1
R1IN
R2OUT
R2IN
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+
VCC
+5V TO +10V
VOLTAGE
DOUBLER
GND
T1IN
T1
T1OUT
T2IN
T2
T2OUT
TTL/CMOS
INPUTS*
RS-232
OUTPUTS
R1OUT
R1
R1IN
R2OUT
R2IN
TTL/CMOS
OUTPUTS
RS-232
INPUTS**
R2
5V INPUT
VCC
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.
GENERAL DESCRIPTION
The ADM202/ADM203 is a two-channel RS-232 line driver/
receiver pair designed to operate from a single 5 V power sup-
ply. 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 consump-
tion 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.
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
9 V Output Swing with 5 V Supply
Low Power BiCMOS: 2.0 mA ICC
30 V Receiver Input Levels
APPLICATIONS
Computers
Peripherals
Modems
Printers
Instruments
High-Speed, 5 V, 0.1 F
CMOS RS-232 Driver/Receivers


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