adm203 Analog Devices, Inc., adm203 Datasheet

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adm203

Manufacturer Part Number
adm203
Description
High Speed, +5 V, 0.1 Uf Cmos Rs-232 Driver/receivers
Manufacturer
Analog Devices, Inc.
Datasheet

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a
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.
TTL/CMOS
TTL/CMOS
TTL/CMOS
TTL/CMOS
OUTPUTS
OUTPUTS
TO THESE PINS
CMOS RS-232 Driver/Receivers
INPUTS
INPUTS
CONNECTIONS
DO NOT MAKE
–10V POWER
+10V POWER
INTERNAL
INTERNAL
SUPPLY
INTERNAL 400k
INTERNAL 400k
SUPPLY
INTERNAL 5k
INTERNAL 5k
R1
R2
R1
R2
0.1 F
0.1 F
6.3V
T1
T2
T1
T2
16V
OUT
OUT
OUT
OUT
FUNCTIONAL BLOCK DIAGRAMS
IN
IN
IN
IN
High-Speed, 5 V, 0.1 F
PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
C1+
C1–
C2+
C2–
C1+
C1–
V–
V–
V+
GND
ADM202/ADM203
+10V TO –10V
+5V TO +10V
GND
INVERTER
ADM203
DOUBLER
VOLTAGE
VOLTAGE
T1
T2
5V INPUT
T1
T2
V
CC
R1
R2
R1
R2
GND
ADM202
V
C2+
C2+
C2–
C2–
5V INPUT
V+
CC
V–
0.1 F
6.3V
0.1 F
16V
T1
T2
R1
R2
T1
T2
R1
R2
OUT
OUT
IN
IN
OUT
OUT
IN
IN
RS-232
OUTPUTS
RS-232
OUTPUTS
RS-232
INPUTS
RS-232
INPUTS
0.1 F
6.3V

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adm203 Summary of contents

Page 1

... 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. High-Speed 0.1 F CMOS RS-232 Driver/Receivers ...

Page 2

... V) CC tion is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Model ADM202JN ADM202JRN ADM202JRW ADM203JN 10%, (ADM202 C1–C4 = 0.1 F). All Specifications Conditions/Comments = 5 V ± 5 Loaded with CC OUT OUT 3 kΩ ...

Page 3

... GND Ground Pin. Must be connected 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. ...

Page 4

... ADM202/ADM203 –Typical Performance Characteristics –5 –10 – LOAD CURRENT – LOW-TO-HIGH SLEW RATE 10 HIGH-TO-LOW SLEW RATE 500 1k 1.5k CAPACITIVE LOAD – CH1 10.0V CH2 5.00V M 1.00 s CH2 LOADED SLEW RATE – 1nF ...

Page 5

... Their values are not critical and can be reduced if higher levels of ripple are acceptable. The charge pump capacitors C1 and C2 may also be reduced at the expense of higher output imped- ance on the V+ and V– supplies. On the ADM203, all capacitors are molded into the package. The V+ and V– supplies may also be used to power external circuitry if the current requirements are small ...

Page 6

... ADM202/ADM203 0.210 (5.33) 0.1574 (4.00) 0.1497 (3.80) 16-Lead Wide SOIC (R-16W) 0.413 (10.50) 0.348 (10.10 0.2992 (7.60) 0.2914 (7.40) 0.419 (10.65 0.404 (10.26) PIN 1 0.107 (2.72) 0.050 (1.27) 0.089 (2.26) BSC 0.018 (0.46) 0.010 (0.25) SEATING 0.015 (0.38) PLANE 0.004 (0.10) 0.014 (0.36) 0.007 (1.18) OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 16-Lead Plastic DIP (N-16) 0.840 (21.34) 0.745 (18.92 0.280 (7.11) ...

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