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±15 kV ESD Protected, 3.3 V Single-Channel
RS-232 Line Driver/Receiver
ADM3101E
FEATURES
460 kbps data rate
1 Tx and 1 Rx
Meets EIA/TIA-232E specifications
0.1 μF charge pump capacitors
Contact discharge: ±8 kV
Air gap discharge: ±15 kV
C1 +
0.1µF
16V
C2 +
0.1µF
16V
CMOS
INPUT
FUNCTIONAL BLOCK DIAGRAM
+3.3V INPUT
C1+
C1–
C2+
C2–
T
IN
V
CC
V+
V–
+
+
+3.3V TO +6.6V
VOLTAGE DOUBLER
C3
0.1µF
6.3V
C4
0.1µF
16V
+ C5
0.1µF
+6.6V TO –6.6V
VOLTAGE INVERTER
APPLICATIONS
General-purpose RS-232 data links
Industrial/telecommunications diagnostics ports
T
T
OUT
EIA/TIA-232E
OUTPUT
ADM3101E
CMOS
OUTPUT
R
OUT
R
GND
R
IN
EIA/TIA-232E
INPUT*
*INTERNAL 5kΩ PULL-DOWN
RESISTOR ON THE RS-232 INPUT.
Figure 1.
GENERAL DESCRIPTION
The ADM3101E is a high speed, single-channel, RS-232/
ITU-T V.28 transceiver interface device that operates from
a single 3.3 V power supply. Low power consumption makes
it ideal for battery-powered portable instruments.
The ADM3101E conforms to the EIA/TIA-232E and ITU-T V.28
specifications and operates at data rates of up to 460 kbps.
All RS-232 (T
OUT
and R
IN
) and CMOS (T
IN
and R
OUT
) inputs
and outputs are protected against electrostatic discharges (up
to ±15 kV ESD protection).
Because of the ±15 kV ESD protection of the ADM3101E
input/output pins, this device is ideally suited for operation
in electrically harsh environments or where RS-232 cables are
frequently plugged and unplugged.
Four external 0.1 μF charge pump capacitors are used for the
voltage doubler/inverter permitting operation from a single
3.3 V supply.
The ADM3101E is available in both a 12-lead LFCSP and 16-lead
QSOP, specified over the −40°C to +85°C temperature range.
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: 781.461.3113 ©2007–2008 Analog Devices, Inc. All rights reserved.
06766-001
ADM3101E
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 4
ESD Caution .................................................................................. 4
Pin Configurations and Function Descriptions ............................5
Typical Performance Characteristics ..............................................6
Theory of Operation .........................................................................8
Circuit Description .......................................................................8
High Baud Rate ..............................................................................8
Outline Dimensions ..........................................................................9
Ordering Guide .............................................................................9
REVISION HISTORY
7/08—Rev. B to Rev. C
Changes to General Description Section ...................................... 1
Reformatted Table 1 ......................................................................... 4
Change to T
IN
Rating, Table 2 ......................................................... 4
Changes to Figure 2 .......................................................................... 5
Moved High Baud Rate Section ...................................................... 8
Added Exposed Pad Notation to Outline Dimensions ............... 9
12/07—Rev. A to Rev. B
Added 16-lead QSOP Package (Universal) ................................... 1
Updated Outline Dimensions ....................................................... 10
Changes to Ordering Guide .......................................................... 10
10/07—Rev. 0 to Rev. A
Changes to Figure 1 ...........................................................................1
Changes to Table 1, RS-232 Receiver Section ................................3
Changes to Table 3.............................................................................5
Changes to Figure 11.........................................................................8
5/07—Revision 0: Initial Version
Rev. C | Page 2 of 12
ADM3101E
SPECIFICATIONS
V
CC
= 3.3 V ± 0.3 V, C1 to C4 = 0.1 μF, −40°C ≤ T
A
≤ +85°C, unless otherwise noted.
Table 1.
Parameter
DC CHARACTERISTICS
Operating Voltage Range
Power Supply Current, V
CC
LOGIC
Input Logic Threshold Low, V
INL
Input Logic Threshold High, V
INH
Input Logic Threshold Low, V
INL
Input Logic Threshold High, V
INH
CMOS Output Voltage Low, V
OL
CMOS Output Voltage High, V
OH
Logic Pull-Up Current
RS-232 RECEIVER
EIA/TIA-232E Input Voltage Range
1
EIA/TIA-232E Input Threshold Low
EIA/TIA-232E Input Threshold High
EIA/TIA-232E Input Hysteresis
EIA/TIA-232E Input Resistance
TRANSMITTER
Output Voltage Swing
RS-232
RS-562
Transmitter Output Resistance
RS-232 Output Short-Circuit Current
TIMING CHARACTERISTICS
Maximum Data Rate
Receiver Propagation Delay
t
PHL
t
PLH
Transmitter Propagation Delay
Transmitter Skew
Receiver Skew
Transition Region Slew Rate
ESD PROTECTION
RS-232 and CMOS I/O Pins
Test Conditions/Comments
Min
3.0
No load
R
L
= 3 kΩ to GND
T
IN
T
IN
T
IN
, V
CC
= 5.0 V ± 0.5 V
T
IN
, V
CC
= 5.0 V ± 0.5 V
I
OUT
= 1.6 mA
I
OUT
=
−1
mA
T
IN
= GND to V
CC
Typ
3.3
1.5
5
Max
5.5
2.6
7
0.6
1.4
0.8
2.0
0.4
V
CC
− 0.6
5
−30
0.6
12
+30
1.3
1.6
0.4
5
2.4
7
Unit
V
mA
mA
V
V
V
V
V
V
μA
V
V
V
V
kΩ
V
CC
= 3.0 V to 5.5 V
3
V
CC
= 3.3 V to 5.5 V; transmitter output loaded
with 3 kΩ to ground
V
CC
= 3.0 V
V
CC
= 0 V, V
OUT
= ±2 V
1
±5.0
±4.5
300
±5.7
V
V
Ω
mA
kbps
±15
V
CC
= 3.3 V, R
L
= 3 kΩ to 7 kΩ, C
L
= 50 pF to 1000 pF
460
0.4
0.4
600
80
70
10
R
L
= 3 kΩ, C
L
= 1000 pF
+3 V to −3 V or
−3
V to +3 V, V
CC
= +3.3 V,
R
L
= 3 kΩ, C
L
= 1000 pF, T
A
= 25°C
1
Human body model air discharge
Human body model contact discharge
5.5
30
μs
μs
ns
ns
ns
V/μs
±15
±8
kV
kV
1
Guaranteed by design.
Rev. C | Page 3 of 12
ADM3101E
ABSOLUTE MAXIMUM RATINGS
T
A
= 25°C, unless otherwise noted.
Table 2.
Parameter
V
CC
V+
V−
Input Voltages
T
IN
R
IN
Output Voltages
T
OUT
R
OUT
Short-Circuit Duration
T
OUT
Package Information
θ
JA
, Thermal Impedance (LFCSP)
θ
JA
, Thermal Impedance (QSOP)
Operating Temperature Range
Industrial (A Version)
Storage Temperature Range
Pb-Free Temperature (Soldering, 10 sec)
Rating
−0.3 V to +6 V
(V
CC
− 0.3 V) to +13 V
+0.3 V to −13 V
−0.3 V to (V
CC
+ 0.3 V)
±30 V
±15 V
−0.3 V to (V
CC
+ 0.3 V)
Continuous
61.1°C/W
149.97°C/W
−40°C to +85°C
−65°C to +150°C
260°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION
Rev. C | Page 4 of 12
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