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LTC2876IDD#PBF

Description
IC TXRX RS485 60V PROFIBUS 8DFN
Categorysemiconductor    Analog mixed-signal IC   
File Size2MB,32 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric View All

LTC2876IDD#PBF Overview

IC TXRX RS485 60V PROFIBUS 8DFN

LTC2876IDD#PBF Parametric

Parameter NameAttribute value
typetransceiver
protocolRS485
Number of drivers/receivers1/1
duplexHalf
receiver lag240mV
data rate20Mbps
Voltage - Power4.5 V ~ 5.5 V
Operating temperature-40°C ~ 85°C
Installation typesurface mount
Package/casing8-WFDFN Exposed Pad
Supplier device packaging8-DFN(3x3)
LTC2876/LTC2877
±60V Rugged PROFIBUS
RS485 Transceivers
FeaTures
n
n
n
n
n
n
n
DescripTion
The
LTC
®
2876
and LTC2877 are PROFIBUS RS485
transceivers designed to meet the test specifications for
PROFIBUS-DP masters and PROFIBUS-DP slaves, fully
compatible with IEC 61158-2, type 3: medium attachment
unit (MAU). With operation up to 20Mbps, the LTC2876/
LTC2877 supports all PROFIBUS data rates up to 12Mbps.
The LTC2876 and LTC2877 are exceptionally robust, toler-
ating ±60V faults on the bus pins and protected to ±52kV
ESD. These devices are suitable for harsh environments
or where 24V power might be inadvertently connected.
Extended ±25V input common mode range and full fail-
safe operation improve data communication reliability in
noisy systems.
The LTC2876 and LTC2877 meet PROFIBUS and RS485
specifications with a supply voltage of 4.5V to 5.5V but
can operate down to 3V with reduced supply current.
Product Selection Guide
PART NUMBER
LTC2876
LTC2877
LOGIC SUPPLY PIN
NO
YES
PACKAGE
DFN-8, MSOP-8
DFN-10, MSOP-10
n
n
n
n
n
PROFIBUS IEC 61158-2 Compliant
Protected from Overvoltage Line Faults to ±60V
±52kV ESD Interface Pins, ±15kV All Other Pins
±2kV (Level 4) IEC61000-4-4 Fast Transient Burst
±25V Working Common Mode Range
20Mbps Maximum Baud Rate
1.65V to 5.5V Logic Supply Pin for Flexible Digital
Interfacing (LTC2877)
5V Supply Can Operate Down to 3V for Low Power,
Low Swing Applications
Fully Balanced Differential Receiver Thresholds with
240mV Hysteresis for Superior Noise Tolerance and
Low Duty Cycle Distortion
Receiver Failsafe for Open, Shorted and Terminated
Conditions
Wide Operating Temperature Range: –40°C to 125°C
Available in Small DFN and MSOP Packages
applicaTions
n
n
n
n
PROFIBUS-DP
Industrial Communication Networks
RS485 and RS422 Systems
3V Low Voltage Differential Signaling
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Typical applicaTion
1.8V
5V
5V
1µF
390
PB
µC
SENSOR
RE
DI
DE
GND
PA
PA
390
Z
O
= 150Ω
PB
220
390
220
390
B´– A´
2V/DIV
0.1µF
V
L
RO
LTC2877
V
CC
Eye Diagram of 12Mbps Signal at
the Near and Far End of a 100m
PROFIBUS Cable Driven by the
LTC2877 Using 2
8
–1 PRBS Pattern
PB–PA
2V/DIV
PROFIBUS
CABLE
NEAR END
FAR END
28767 TA01a
20ns/DIV
28767 TA01b
28767fa
For more information
www.linear.com/LTC2876
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