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ADM205AN PDF预览

ADM205AN

更新时间: 2024-11-19 22:39:03
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亚德诺 - ADI 驱动器
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12页 488K
描述
0.1 uF, +5 V Powered CMOS RS-232 Drivers/Receivers

ADM205AN 数据手册

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0.1 F, +5 V Powered  
CMOS RS-232 Drivers/Receivers  
a
ADM205–ADM211/ADM213  
TYPICAL OPERATING CIRCUIT  
FEATURES  
0.1 F to 10 F Capacitors  
120 kB/s Data Rate  
+5V INPUT  
12 C1+  
14 C1–  
VCC 11  
2 Receivers Active in Shutdown (ADM213)  
On-Board DC-DC Converters  
؎9 V Output Swing with +5 V Supply  
Low Power (15 mW)  
+5V TO +10V  
VOLTAGE  
DOUBLER  
0.1µF  
0.1µF  
0.1µF  
6.3V  
16V  
13  
17  
V+  
V–  
15 C2+  
16 C2–  
+10V TO –10V  
VOLTAGE  
INVERTER  
0.1µF  
16V  
0.1µF  
16V  
Low Power Shutdown 5 W  
؎30 V Receiver Input Levels  
Latch-Up FREE  
T1IN  
T2  
T1 OUT  
T2 OUT  
T3 OUT  
T1  
2
3
7
6
T2  
N
I
TTL/CMOS  
INPUTS*  
RS-232  
OUTPUTS  
Plug-In Upgrade for MAX205-211/213  
T3IN  
T4  
20  
21  
8
T3  
1
28  
9
T4  
T4 OUT  
R1 IN  
N
I
APPLICATIONS  
Computers  
Peripherals  
Modems  
Printers  
Instruments  
R1  
R1 OUT  
5
4
R2 IN  
R2  
R2 OUT  
R3 OUT  
R4 OUT  
R5 OUT  
EN  
RS-232  
INPUTS**  
TTL/CMOS  
OUTPUTS  
26  
R3  
27  
23  
18  
25  
R3 IN  
R4 IN  
22  
19  
24  
R4  
R5  
R5 IN  
SD  
GND  
10  
ADM211  
*INTERNAL 400kPULL-UP RESISTOR ON EACH TTL/CMOS INPUT  
**INTERNAL 5kPULL-DOWN RESISTOR ON EACH RS-232 INPUT  
GENERAL DESCRIPTION  
active-high receiver enable control. Two receivers of the  
ADM213 remain active during shutdown. This feature is useful  
for ring indicator monitoring.  
The ADM2xx family of line drivers/receivers is intended for all  
EIA-232-E and V.28 communications interfaces, especially in  
applications where ±12 V is not available. The ADM205,  
ADM206, ADM211 and ADM213 feature a low power shut-  
down mode which reduces power dissipation to less than 5 µW  
making them ideally suited for battery powered equipment. The  
ADM205 does not require any external components and is par-  
ticularly useful in applications where printed circuit board space  
is critical. The ADM213 has an active-low shutdown and an  
All members of the ADM2xx family, except the ADM209, in-  
clude two internal charge pump voltage converters which allow  
operation from a single +5 V supply. These converters convert  
the +5 V input power to the ±10 V required for RS-232 output  
levels. The ADM209 is designed to operate from +5 V and  
+12 V supplies. An internal +12 V to –12 V charge pump volt-  
age converter generates the –12 V supply.  
Table I. Selection Table  
No. of  
RS-232  
No. of  
RS-232  
Low Power  
Shutdown  
(SD)  
TTL  
Three-State  
EN  
No. of Receivers  
Active in  
Shutdown  
Part  
Power  
External  
Number Supply Voltage  
Drivers Receivers Capacitors  
ADM205 +5 V  
ADM206 +5 V  
ADM207 +5 V  
ADM208 +5 V  
ADM209 +5 V & +9 V to +13.2 V  
ADM211 +5 V  
ADM213 +5 V  
5
4
5
4
3
4
4
5
3
3
4
5
5
5
None  
Yes  
Yes  
No  
No  
No  
Yes  
Yes (SD)  
Yes  
Yes  
No  
No  
Yes  
Yes  
Yes (EN)  
0
0
0
0
0
0
2
4
4
4
2
4
4
REV. 0  
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.  
© Analog Devices, Inc., 1994  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 617/329-4700 Fax: 617/326-8703  

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