LTC2862A Provides Higher Robustness and Signal Integrity for RS485/RS422 Applications

Milpitas, CA (MILPITAS, CA) and Norwood, MA   (NORWOOD, MA) Analog Devices   (Analog Devices, Inc., ADI)   (Linear Technology Corporation) Introduces an enhanced version of the LTC2862   LTC2862A, LTC2862 is ±60V   Tolerance   The RS485/RS422 transceiver was introduced a few years ago and has been widely adopted. These two half-duplex transceivers are designed for cross-line faults, ground voltage faults or lightning-induced surge voltages on the actual   The RS485 system provides protection from field failures without the need for costly external protection devices that can cause overvoltage conditions that exceed the absolute maximum ratings of typical transceivers. Both devices are in   3V to   Operates within 5.5V supply voltage range while maintaining compliance   TIA/EIA-485-A standard requirements. However, the LTC2862A   Higher performance specifications, including an unprecedented ±40kV mannequin   (HBM)   And IEC Level 4 ESD ratings, thus improving ESD protection and noise immunity compared to its predecessor, providing greater ruggedness and signal integrity.

The LTC2862A provides very useful protection and reliability for a wide range of RS485/RS422 applications, including industrial control, instrumentation networks and automotive electronics applications. LTC2862A, whether the circuit is transmitting, receiving, in standby or power down   Can withstand ±60V   Any voltage within it will not be damaged. Extended ±25V   The input common-mode range increases operational reliability and extends functional effectiveness to environments with high common-mode voltages. The fully symmetrical receiver threshold ensures good duty cycle symmetry at low signal levels, and additional filtering capability prevents errors due to high frequency noise, providing optimum fail-safe operation. Significantly improved   ESD protection capability allows   The LTC2862A accepts ±40kV HBM (IEC-61000-4-2 ESD Level 4: ±8kV) on the transceiver pins without latch-up or damage; all other pins are protected from ±15kV HBM. The LTC2862A also provides ±5kV protection for electrical fast transients (EFT) with IEC 610004-4 EFT Level 4.

The LTC2862A is available in two data rates: fast 20Mbps LTC2862A-1 and low   EMI 250kbps LTC2862A-2. Both devices are available in commercial, industrial, automotive and military temperature grade versions.   SO-8 and   3mm x 3mm DFN-8 package. 1,000 pieces of the purchase price for each piece   2.35 US dollars. For more information, please log in   LTC2862A

Performance Summary: LTC2862A                           

? To provide   ±60V overvoltage line fault protection

? 3V to 5.5V supply voltage ? 20Mbps or low EMI 250kbps data rate

? Interface pin provides   ±40kV HBM ESD, available on other pins   ±15kV

? Provided at the interface pin   IEC Level 4 ESD and   EFT protection

? Enhanced fail-safe receiver and noise immunity

? Extended common mode range: ± 25V

? The receiver is guaranteed to fail-safe operation

? Providing military (MP   Level) selection (–55°C to 125°C)

? industry standard pin layout

The quotes given in this article are for budgetary purposes only. Quotations around the country may vary depending on local tariffs, taxes, fees and exchange rates.

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