a
15 kV ESD Protected, 2.7 V to 3.6 V
Serial Port Transceivers with Green Idle
™
ADM3307E/ADM3310E/ADM3311E/ADM3312E/ADM3315E
*
The active receiver can alert the processor, which can then take
the ADM33xxE device out of the shutdown mode.
The ADM3307E contains five drivers and three receivers and is
intended for mobile phone data lump cables and portable com-
puting applications.
The ADM3311E contains three drivers and five receivers and is
intended for serial port applications on notebook/laptop computers.
The ADM3310E is a low current version of the ADM3311E. This
device also allows two receivers to be active in shutdown mode.
The ADM3312E contains three drivers and three receivers and is
intended for serial port applications, PDAs, mobile phone data
lump cables, and other hand-held devices.
The ADM3315E is a low current version of the ADM3312E,
with a 22 kW receiver input resistance that reduces the drive
requirements of the DTE. Its main applications are PDAs,
palmtop computers, and mobile phone data lump cables.
The ADM33xxE devices are fabricated using CMOS technology
for minimal power consumption. All parts feature a high level
of overvoltage protection and latch-up immunity.
All ADM33xxE devices are available in a 32-lead 5 mm
¥
5 mm
LFCSP package and in a TSSOP package (ADM3307E,
ADM3310E, and ADM3311E in a 28-lead TSSOP; ADM3312E
and ADM3315E in a 24-lead TSSOP). The ADM3311E also
comes in a 28-lead SSOP package.
The ADM33xxE devices are ruggedized RS-232 line drivers/
receivers that operate from a single supply of 2.7 V to 3.6 V.
Step-up voltage converters coupled with level shifting transmitters
and receivers allow RS-232 levels to be developed while operating
from a single supply. Features include low power consumption,
Green Idle operation, high transmission rates, and compatibility
with the EU directive on electromagnetic compatibility. This EM
compatibility directive includes protection against radiated and
conducted interference, including high levels of electrostatic
discharge.
All RS-232 (and CMOS, SD, and
EN
for ADM3307E) inputs and
outputs are protected against electrostatic discharges (up to
±
15 kV).
This ensures compliance with IEC 1000-4-2 requirements.
These devices are ideally suited for operation in electrically harsh
environments or where RS-232 cables are frequently being
plugged/unplugged. They are also immune to high RF field
strengths without special shielding precautions.
Emissions are also controlled to within very strict limits. CMOS
technology is used to keep the power dissipation to an absolute
minimum, allowing maximum battery life in portable applications.
FEATURES
Green Idle Power-Saving Mode
Single 2.7 V to 3.6 V Power Supply
Operates with 3 V Logic
0.1 F to 1 F Charge Pump Capacitors
Low EMI
Low Power Shutdown: 20 nA
Full RS-232 Compliance
460 kbits/s Data Rate
1 Receiver Active in Shutdown (2 for ADM3310E)
ESD >15 kV IEC 1000-4-2 on RS-232 I/Os (ADM33xxE)
ESD >15 kV IEC 1000-4-2 on CMOS and RS-232 I/Os
(ADM3307E)
APPLICATIONS
Mobile Phone Handsets/Data Cables
Laptop and Notebook Computers
Printers
Peripherals
Modems
PDAs/Hand-Held Devices/Palmtop Computers
GENERAL DESCRIPTION
The ADM33xxE line of driver/receiver products is designed to
fully meet the EIA-232 standard while operating with a single
2.7 V to 3.6 V power supply. The devices feature an on-board
charge pump dc-to-dc converter, eliminating the need for dual
power supplies. This dc-to-dc converter contains a voltage
tripler and a voltage inverter that internally generates positive
and negative supplies from the input 3 V power supply. The dc-
to-dc converter operates in Green Idle mode, whereby the charge
pump oscillator is gated ON and OFF to maintain the output
voltage at
±7.25
V under varying load conditions. This minimizes
the power consumption and makes these products ideal for
battery-powered portable devices.
The ADM33xxE devices are suitable for operation in harsh elec-
trical environments and contain ESD protection up to
±
15 kV
on their RS-232 lines (ADM3310E, ADM3311E, ADM3312E,
and ADM3315E). The ADM3307E contains ESD protection
up to
±
15 kV on all I/O lines (CMOS, RS-232,
EN,
and SD).
A shutdown facility that reduces the power consumption to
66 nW is also provided. While in shutdown, one receiver remains
active (two receivers active with ADM3310E), thereby allowing
monitoring of peripheral devices. This feature allows the device
to be shut down until a peripheral device begins communication.
*Protected
by U.S.Patent No. 5,606,491.
REV. G
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. 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
© 2004 Analog Devices, Inc. All rights reserved.
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