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ADM101EARMZ Datasheet(PDF) 1 Page - Analog Devices

Part No. ADM101EARMZ
Description  Craft PortTM Tiny RS-232 Transceiver for Portable Applications
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADM101EARMZ Datasheet(HTML) 1 Page - Analog Devices

   
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REV. A
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.
a
ADM101E
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
© Analog Devices, Inc., 2001
Craft PortTM Tiny RS-232 Transceiver for
Portable Applications
FUNCTIONAL BLOCK DIAGRAM
VCC
GND
V–
SD
TIN
1
2
3
4
10
9
8
7
C1–
C1+
TOUT
5
6
ROUT
RIN
R1
T1
+5V TO –5V
VOLTAGE
INVERTER
0.1 F
0.1 F
5V
0.1 F
+
+
+
ADM101E
FEATURES
460 kbit/s Transmission Rate
Single 5 V Power Supply
Compatible with RS-232 Input/Output Levels
0.1
F Charge Pump Capacitors
One Driver and One Receiver
On-Board DC-DC Converter
4.2 V Output Swing with 5 V Supply
Low Power BiCMOS: 500
A ICC
Ultralow Power (1
A) Shutdown Mode
10-Lead
SOIC Package
APPLICATIONS
Mobile Telephones
Palmtop Computers
PDAs
Portable Instrumentation
GPS Receivers
GENERAL DESCRIPTION
The ADM101E is a single channel RS-232 driver and receiver in
the Analog Devices Craft Port series, designed to operate from a
single, 5 V supply. A highly efficient charge-pump voltage inverter
generates an on-chip –5 V supply, which eliminates the need
for a negative power supply for the driver and permits RS-232
compatible output levels to be developed using charge pump
capacitors as small as 0.1
µF.
A shutdown input disables the charge pump and puts the device
into a low power shutdown mode, in which the current con-
sumption is typically less than 1
µA. The transmitter is disabled
during shutdown but the receiver remains functional.
Craft Port is a trademark of Analog Devices, Inc.
An epitaxial BiCMOS construction minimizes power consump-
tion to 3 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 I-O pins
have ESD protection to levels greater than 15 kV.
The ADM101E is available in a 10-lead
µSOIC package, which
makes it ideal for serial communications in small, portable
applications such as palmtop computers and mobile telephones,
where a full, RS-232 serial interface is not required, but com-
pact size and low power drain are paramount.


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