0.1 µF, 5 V Powered CMOS
RS-232 Drivers/Receivers
ADM206–ADM211/ADM213
FEATURES
TYPICAL OPERATING CIRCUIT
0.1 µF to 10 µF capacitors
120 kB/s data rate
Two receivers active in shutdown (ADM213)
On-board dc-to-dc converters
9 ꢀ output swing with 5 ꢀ supply
Low power (15 mW)
5V INPUT
12
14
V
CC
C1+
C1–
+5VTO +10V
VOLTAGE
DOUBLER
11
13
+
+
+
0.1
16V
µF
0.1µF
6.3V
0.1µF
+
+
V+
V–
+10VTO –10V
VOLTAGE
INVERTER
15 C2+
17
0.1µF
16V
0.1
16V
µF
16
C2–
Low power shutdown ≤ 5 µW
30 ꢀ receiver input levels
Latch-up free
T1
T1
T2
T3
T4
R1
R2
R3
R4
R5
2
3
T1
7
6
IN
IN
IN
IN
OUT
OUT
OUT
OUT
IN
T2
T3
T4
T2
T3
T4
R1
R2
R3
R4
R5
TTL/CMOS
INPUTS
RS-232
OUTPUTS
1
Plug-in upgrade for MAX205-211/213
20
21
8
1
28
9
APPLICATIONS
Computers
Peripherals
Modems
Printers
Instruments
R1
R2
R3
R4
R5
OUT
OUT
4
5
IN
IN
IN
IN
TTL/CMOS
OUTPUTS
RS-232
INPUTS
27
23
26
22
19
24
OUT
OUT
OUT
EN
2
18
25
SD
ADM211
GND
10
NOTES
1
INTERNAL 400k
Ω PULL-UP RESISTOR ON EACH TTL/CMOS INPUT.
GENERAL DESCRIPTION
2
INTERNAL 5k
Ω
PULL-DOWN RESIST OR ON EACH RS-232 INPUT.
The ADM2xx family of line drivers/receivers is intended for all
EIA-232-E and V.28 communications interfaces, especially in
applications where ±±2 V is not available. The ADM206,
ADM2±±, and ADM2±3 feature a low power shutdown mode
that reduces power dissipation to less than 5 µW, making them
ideally suited for battery-powered equipment. The ADM2±3
has an active low shutdown and an active high receiver-enable
control. Two receivers of the ADM2±3 remain active during
shutdown. This feature is useful for ring indicator monitoring.
Figure 1.
All members of the ADM2xx family, except the ADM209,
include two internal charge pump voltage converters that allow
operation from a single 5 V supply. These parts convert the 5 V
input power to the ±±0 V required for ꢀR-232 output levels.
The ADM209 is designed to operate from 5 V and ±2 V supplies.
An internal +±2 V to –±2 V charge pump voltage converter
generates the –±2 V supply.
Table 1. Selection Table
TTL Three-
Part
Power Supply Number of RS-
Number of
RS-232 Receivers
External
Capacitors
Low Power
Shutdown (SD)
Number of Receivers
Active in Shutdown
EN
State
Yes
No
Number
ꢀoltage
232 Drivers
ADM206
ADM207
ADM208
ADM209
5 V
4
5
4
3
3
3
4
5
4
4
4
2
Yes
No
No
No
0
0
0
0
5 V
5 V
No
5 V and 9 V to
13.2 V
Yes
ADM211
ADM213
5 V
5 V
4
4
5
5
4
4
Yes
Yes
0
2
SD
Yes (EN)
Yes (
)
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
Fax: 781.326.8703
www.analog.com
© 2005 Analog Devices, Inc. All rights reserved.
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