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

TheLTC®2862Aisalowpower,20Mbpsor250kbpsRS485/

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

toelectricaloverstress;increasedreceivernoiseimmunity;

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

inthe250kbpsLTC2862A-2option,whiletheLTC2862A-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

LTC2862A

LTC2862A

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