15 kV ESD Protected, 2.7 V to 3.6 V Serial
Port Transceivers with Green Idle
ADM3307E/ADM3310E/ADM3311E/ADM3312E/ADM3315E1
Data Sheet
FEATURES
FUNCTIONAL BLOCK DIAGRAMS
Green Idle power-saving mode
Single 2.7 V to 3.6 V power supply
Operates with 3 V logic
0.1 µF to 1 µF charge pump capacitors
Low EMI
Low power shutdown: 20 nA
Full RS-232 compliance
460 kb/s data rate
One receiver active in shutdown
(ADM3307E/ADM3311E/ADM3312E/ADM3315E)
Two receivers active in shutdown (ADM3310E)
ESD >15 kV IEC 1000-4-2 on RS-232 I/Os
ESD >15 kV IEC 1000-4-2 on CMOS and RS-232 I/Os
(ADM3307E)
Qualified for automotive applications
C1
0.1µF
VCC
0.1µF
CERAMIC
C4
0.1µF
+
10µF
TANTALUM
VOLTAGE C2+
TRIPLER/
VCC INVERTER C3+
+3V TO ±9V
C1+
C2–
V+
ENABLE
INPUT
EN
V–
SD
GND
T1IN
CMOS
INPUTS1
T2
T3IN
T4IN
T4
R1
R3
R3OUT
V–
EN
C1–
SD
T1
T1IN
T2IN
T3
400kΩ PULL-UP RESISTOR ON EACH CMOS INPUT.
5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
Figure 1. ADM3307E Functional Block Diagram
R2
R2OUT
R3
R3OUT
R5OUT
C4
0.1µF
C3
0.1µF
VCC
10µF
TANTALUM
C2
0.1µF
R4
R5
V–
C2–
ENABLE
INPUT
EN
C1–
C1+
SHUTDOWN
INPUT
SD
T1
T1IN
CMOS
INPUTS1
EIA/TIA-232
OUTPUTS
T2IN
T3IN
R1IN
CMOS
OUTPUTS
EIA/TIA-232
INPUTS2
T3
R4IN
C5
0.1µF
SHUTDOWN
INPUT
T1OUT
EIA/TIA-232
OUTPUTS
T3OUT
R1
R2
R2OUT
R3OUT
C3
0.1µF
T2OUT
T2
R1OUT
R2IN
R3IN
VOLTAGE C3+
TRIPLER/
C2+ INVERTER GND
+3V TO ±9V
C3–
VCC
V+
+
C5
0.1µF
R3
R1IN
R2IN
EIA/TIA-232
INPUTS2
R3IN
ADM3312E/
ADM3315E
R5IN
ADM3310E/
ADM3311E
1INTERNAL 400kΩ PULL-UP RESISTOR ON EACH CMOS INPUT.
2INTERNAL 5kΩ (22kΩ FOR ADM3315E) PULL-DOWN RESISTOR ON
400kΩ PULL-UP RESISTOR ON EACH CMOS INPUT.
5kΩ PULL-DOWN RESISTOR ON EACH RS-232 INPUT.
02915-002
1INTERNAL
2INTERNAL
0.1µF
CERAMIC
T3OUT
R1
R4OUT
02915-001
1INTERNAL
2INTERNAL
T2OUT
R1OUT
CMOS
OUTPUTS
R3IN
ADM3307E
T1OUT
T2
T3IN
EIA/TIA-232
INPUTS2
R2IN
Figure 2. ADM3310E/ADM3311E Functional Block Diagram
EACH RS-232 INPUT.
02915-003
VOLTAGE C3+
TRIPLER/
C2+ INVERTER GND
+3V TO ±9V
C3–
VCC
C1+
CMOS
INPUTS1
R1IN
R2
R2OUT
0.1µF
C2–
ENABLE
INPUT
T5OUT
C1
V+
+
T4OUT
T5
R1OUT
EIA/TIA-232
OUTPUTS
T3OUT
T5IN
0.1µF
10µF
TANTALUM
T2OUT
T3
C1
C2
0.1µF
T1OUT
T1
T2IN
Mobile phone handsets/data cables
Laptop and notebook computers
Printers
Peripherals
Modems
PDAs/Hand-Held Devices/Palmtop Computers
0.1µF
CERAMIC
C5
0.1µF
SHUTDOWN
INPUT
APPLICATIONS
VCC
C3
0.1µF
C3–
C1–
CMOS
OUTPUTS
C4
0.1µF
C2
0.1µF
Figure 3. ADM3312E/ADM3315E Functional Block Diagram
1
Protected by U.S. Patent No. 5,606,491.
Rev. J
Document Feedback
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 ©2002–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
Data Sheet
ADM3307E/ADM3310E/ADM3311E/ADM3312E/ADM3315E
GENERAL DESCRIPTION
The ADM3307E/ADM3310E/ADM3311E/ADM3312E/
ADM3315E 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 ADM3307E/ADM3310E/ADM3311E/ADM3312E/
ADM3315E devices are suitable for operation in harsh electrical
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.
The active receiver can alert the processor, which can then take
the ADM3307E/ADM3310E/ADM3311E/ADM3312E/
ADM3315E 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
computing 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 kΩ 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 ADM3307E/ADM3310E/ADM3311E/ADM3312E/
ADM3315E devices are fabricated using CMOS technology for
minimal power consumption. All parts feature a high level of
overvoltage protection and latch-up immunity.
All ADM3307E/ADM3310E/ADM3311E/ADM3312E/
ADM3315E devices are available in a 32-lead 5 mm × 5 mm
LFCSP_WQ and in a TSSOP (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.
The ADM3307E/ADM3310E/ADM3311E/ADM3312E/
ADM3315E 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.
Rev. J | Page 3 of 20
