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ADM202EARUZ-REEL7

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
EMI/EMC-Compliant, ±15 kV, ESD-Protected
RS-232 Line Drivers/Receivers
ADM202E/ADM1181A
Rev. C
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 that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.326.8703 © 2005 Analog Devices, Inc. All rights reserved.
FEATURES
Complies with 89/336/EEC EMC directive
ESD protection to IEC1000-4-2 (801.2)
±8 kV: contact discharge
±15 kV: air-gap discharge
±15 kV: human body model
EFT fast transient/burst immunity (IEC1000-4-4)
Low EMI emissions (EN55022)
230 kbits/s data rate guaranteed
TSSOP package option
Upgrade for MAX202E, 232E, LT1181A
APPLICATIONS
General-purpose RS-232 data link
Portable instruments
PDAs
GENERAL DESCRIPTION
The ADM202E and ADM1181A are robust, high speed,
2-channel RS-232/V.28 interface devices that operate from a
single 5 V power supply. Both products are suitable for operation
in harsh electrical environments and are compliant with the EU
directive on EMC (89/336/EEC). Both the level of electromagnetic
emissions and immunity are in compliance. EM immunity
includes ESD protection in excess of ±15 kV on all I/O lines,
fast transient/burst protection (1000-4-4), and radiated
immunity (1000-4-3). EM emissions include radiated and
conducted emissions as required by Information Technology
Equipment EN55022, CISPR22.
The ADM202E and ADM1181A conform to the EIA-232E
and CCITT V.28 specifications and operate at data rates up
to 230 kbps.
Four external 0.1 µF charge-pump capacitors are used for the
voltage doubler/inverter, permitting operation from a single
5 V supply.
FUNCTIONAL BLOCK DIAGRAMS
*
INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
C1+
C1–
C2+
C2–
V
CC
10V
10V
V+
V–
+5V TO +10V
VOLTAGE
DOUBLER
5V INPUT
C3
6.3V
+10V TO –10V
VOLTAGE
INVERTER
C4
10V
T1
OUT
T1
IN
C5
T2
OUT
T2
IN
ADM202E
R1
OUT
R2
OUT
R1
IN
R2
IN
CMOS
INPUTS
CMOS
O
UTPUTS
EIA/TIA-232
OUTPUTS
EIA/TIA-232
INPUTS
*
GND
T1
T2
R1
R2
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
00066-001
Figure 1.
*
INTERNAL 5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT
C1+
C1–
C2+
C2–
V
CC
0.1µF
10V
10V
V+
V–
+5V TO +10V
VOLTAGE
DOUBLER
5V INPUT
C3
10V
+10V TO –10V
VOLTAGE
INVERTER
C4
0.1µF
10V
T1
OUT
T1
IN
C5
0.1µF
10V
T2
OUT
T2
IN
ADM1181A
R1
OUT
R2
OUT
R1
IN
R2
IN
CMOS
INPUTS
CMOS
O
UTPUTS
EIA/TIA-232
OUTPUTS
EIA/TIA-232
INPUTS
*
GND
T1
T2
R1
R2
0.1µF
0.1µF
00066-002
Figure 2.
The ADM202E provides a robust pin-compatible upgrade for
existing ADM202, ADM232L, or MAX202E/MAX232E sockets.
It is available in a 16-lead PDIP, a wide SOIC, a narrow SOIC,
and a space-saving TSSOP package that is 44% smaller than the
SOIC package.
The ADM1181A provides a robust pin-compatible upgrade for
the LTC1181A, and it is available in a 16-lead PDIP package
and a wide 16-lead SOIC package.
ADM202E/ADM1181A
Rev. C | Page 2 of 16
TABLE OF CONTENTS
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 4
ESD Caution.................................................................................. 4
Pin Configuration and Function Descriptions............................. 5
General Description ......................................................................... 6
Circuit Description....................................................................... 6
Charge-Pump DC-to-DC Voltage Converter....................... 6
Transmitter (Driver) Section .................................................. 6
Receiver Section ....................................................................... 6
High Baud Rate............................................................................. 6
ESD/EFT Transient Protection Scheme .................................... 7
Typical Performance Characteristics ..............................................8
ESD Testing (IEC1000-4-2) ...................................................... 10
Fast Transient/Burst Testing (IEC1000-4-4)........................... 11
IEC1000-4-3 Radiated Immunity ............................................ 12
Emissions/Interference.............................................................. 12
Conducted Emissions ................................................................ 12
Radiated Emissions.................................................................... 13
Outline Dimensions....................................................................... 14
Ordering Guide .......................................................................... 15
REVISION HISTORY
2/05—Rev. B to Rev. C.
Updated Format..................................................................Universal
Changed Hysteresis Level..................................................Universal
Change to Specifications.................................................................. 3
Added ESD Caution ......................................................................... 4
Change to Receiver Section............................................................. 6
Updated Outline Dimensions ....................................................... 14
Changes to Ordering Guide .......................................................... 15
2/01—Rev. A to Rev. B.
Deletion of one ESD Rating in
ABSOLUTE MAXIMUM RATINGS............................................. 4
Removal of one column in Table II................................................ 8
ADM202E/ADM1181A
Rev. C | Page 3 of 16
SPECIFICATIONS
V
CC
= 5.0 V ± 10%, C1 to C4 = 0.1 µF. All specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 1.
Parameter Min Typ Max Unit Test Conditions/Comments
DC CHARACTERISTICS
Operating Voltage Range 4.5 5.0 5.5 V
V
CC
Power Supply Current 2.5 6.0 mA No load
13 18 mA R
L
= 3 kΩ to GND
LOGIC
Input Logic Threshold Low, V
INL
0.8 V T
IN
Input Logic Threshold High, V
INH
2.4 V T
IN
CMOS Output Voltage Low, V
OL
0.4 V I
OUT
= 3.2 mA
CMOS Output Voltage High, V
OH
3.5 V I
OUT
= −1 mA
Logic Pull-Up Current +12 ±25 µA T
IN
= 0 V
RS-232 RECEIVER
EIA-232 Input Voltage Range −30 +30 V
EIA-232 Input Threshold Low 0.4 1.2 V
EIA-232 Input Threshold High 1.6 2.4 V
EIA-232 Input Hysteresis 0.65 V
EIA-232 Input Resistance 3 5 7 kΩ T
A
= 0°C to 85°C
RS-232 TRANSMITTER
Output Voltage Swing ±5.0 ±9.0 V
All transmitter outputs loaded with 3 kΩ to
ground
Transmitter Output Resistance 300 Ω V
CC
= 0 V, V
OUT
= ±2 V
RS-232 Output Short-Circuit Current ±10 ±60 mA
TIMING CHARACTERISTICS
Maximum Data Rate 230
kbps R
L
= 3 kΩ to 7 kΩ, C
L
= 50 pF to 1000 pF
Receiver Propagation Delay
T
PHL
0.1 1 µs
T
PLH
0.3 1 µs
Transmitter Propagation Delay 1.0 1.5 µs R
L
= 3 kΩ, C
L
= 1000 pF
Transition Region Slew Rate 3 8 30 V/µs R
L
= 3 kΩ, C
L
= 1000 pF
Measured from +3 V to −3 V, or −3 V to +3 V
EM IMMUNITY
ESD Protection (I/O Pins) ±15 kV Human body model
±15 kV IEC1000-4-2 air discharge
±8 kV kV IEC1000-4-2 contact discharge
EFT Protection (I/O Pins) ±2 kV IEC1000-4-4
EMI Immunity 10 V/m IEC1000-4-3
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

ADM202EARUZ-REEL7

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Manufacturer:
Analog Devices Inc.
Description:
RS-232 Interface IC 2 CH 15KV ESD Protected IC
Lifecycle:
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