adm101e Analog Devices, Inc., adm101e Datasheet

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adm101e

Manufacturer Part Number
adm101e
Description
Craft Porttm Tiny Rs-232 Transceiver For Portable Applications
Manufacturer
Analog Devices, Inc.
Datasheet

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a
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.
Craft Port
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.
TM
Tiny RS-232 Transceiver for
0.1 F
FUNCTIONAL BLOCK DIAGRAM
+
R
Portable Applications
GND
C1–
OUT
T
V–
IN
1
2
3
4
5
ADM101E
+5V TO –5V
INVERTER
VOLTAGE
0.1 F
0.1 F
T1
+
+
R1
10
9
8
7
6
ADM101E
C1+
V
SD
T
R
CC
OUT
IN
5V

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adm101e Summary of contents

Page 1

... 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 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 µ ...

Page 2

... V 3.5 V µs 0.25 25 V/µs 11 V/µs 460 kB Ω 300 ± 25 ± Model ADM101EARM , +0 +0 (V–, –0 unless MIN MAX Test Conditions/Comments = 5 V ± 5 Loaded with 3 kΩ to GND CC OUT = 5 V ± 10 Loaded with 3 kΩ to ...

Page 3

... Receiver Input (EIA-232 Signal Levels Driver Output (EIA-232 Signal Levels). OUT 8 SD Shutdown Input. Logic 1 on this input puts the ADM101E into low power shutdown mode. 9 C1+ Positive Terminal of Charge Pump Capacitor ( Polarized Capacitor Positive Power Supply, Nominally ...

Page 4

... ADM101E –1 –2 –3 –4 –5 0 500 1000 1500 LOAD CAPACITANCE – –2 –4 – – Volts –10 – –30 –40 2000 2500 –1 – ...

Page 5

... The shutdown input allows the ADM101E to be put into an ultralow power mode where the dc-dc converter is switched off and the transmitter is disabled. The receiver remains active during shutdown. Logic 0 at this input enables the ADM101E, while a Logic 1 at this input shuts down the ADM101E. , but will CC ADM101E ...

Page 6

... ADM101E 0.037 (0.94) 0.031 (0.78) ADM101E–Revision History Location Data sheet changed from REV REV. A. Changes made to Outline Dimensions (RM-10 OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 10-Lead SOIC (RM-10) 0.122 (3.10) 0.114 (2.90 0.122 (3.10) 0.199 (5.05) 0.187 (4.75) 0.114 (2.90 PIN 1 0.0197 (0.50) BSC 0.120 (3.05) 0.120 (3.05) 0.112 (2.85) 0.112 (2.85) ...

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