LTC2862A
1
2862af
For more information www.linear.com/LTC2862A
Typical applicaTion
DescripTion
±60V Fault Protected 3V to 5.5V
RS485/RS422 Transceiver
with Level 4 IEC ESD
RS485 Link With Large Ground Loop Voltage
FeaTures
applicaTions
n
Protected from Overvoltage Line Faults to ±60V
n
3V to 5.5V Supply Voltage
n
20Mbps or Low EMI 250kbps Data Rate
n
±40kV HBM ESD Interface Pins, ±15kV Other Pins
n
Enhanced Receiver and Failsafe Noise Immunity
n
IEC Level 4 ESD and EFT on Interface Pins
n
Extended Common Mode Range: ±25V
n
Guaranteed Failsafe Receiver Operation
n
High Input Impedance Supports 224 Nodes
n
MP-Grade Option Available (–55°C to 125°C)
n
Fully Balanced Differential Receiver Thresholds for
Low Duty Cycle Distortion
n
Current Limited Drivers and Thermal Shutdown
n
Compliant with TIA/EIA-485-A
n
Pin Compatible with LTC2862 and LT
®
1785
n
Available in DFN and Leaded Packages
n
Supervisory Control and Data Acquisition (SCADA)
n
Industrial Control and Instrumentation Networks
n
Automotive and Transportation Electronics
n
Building Automation, Security Systems and HVAC
n
Medical Equipment
n
Lighting and Sound System Control
LTC2862A-1 Receiving 10Mbps ±200mV Differential
Signal with 1MHz ±25V Common Mode Sweep
PART NUMBER DUPLEX ENABLES
MAX DATA
RATE (bps)
LTC2862A-1 HALF YES 20M
LTC2862A-2 HALF YES 250k
The LT C
®
2862A is a low power, 20Mbps or 250kbps RS485/
RS422 transceiver operating on 3V to 5.5V supplies with
±60V overvoltage fault protection on the interface pins
during all modes of operation, including power-down.
Improvements were made to the LTC2862 for greater ro
-
bustness and signal integrity: ±
40kV
HBM and Level 4 IEC
ESD protection on the interface pins; increased resistance
to electrical overstress; increased receiver noise immunity;
additional receiver noise filtering on the LTC2862A-2; and
an improved failsafe function optimized for high speed in
the LTC2862A-1 and noise rejection in the LTC2862A-2.
Low EMI slew rate limited data transmission is available
in the 250kbps LTC2862A-2 option, while the LTC2862A-1
operates to 20Mbps.
Extended ±25V input common mode range and full fail
-
safe operation improve data communication reliability in
electrically noisy environments
and in the presence of
large ground loop voltages.
L, LT, LTC, LTM, Linear Technology the Linear logo and µModule are registered trademarks of
Analog Devices, Inc.. All other trademarks are the property of their respective owners.
proDucT selecTion GuiDe
GND1
GND2
2862A TA01a
RO1
RE1
DE1
DI1
V
CC1
LTC2862A LTC2862A
V
CC2
RO2
RE2
DE2
DI2
D D
R R
V GROUND LOOP
≤25V PEAK
A,B
50V/DIV
A–B
0.5V/DIV
100ns/DIV
2862A TA01b
RO
5V/DIV
RO
A,B
A–B