基于ATA6663的全集成LIN收發設計方案

Atmel 公司的ATA6663是全集成LIN收發器,滿足LIN規范2.0,2.1和SAEJ2602-2, 工作電壓5V-27V,完全兼容3.3V和5V器件,波特率高達20 Kbaud,并具有先進的EMI和ESD性能.本文介紹了ATA6663主要特性,方框圖以及應用電路.

The ATA6663 is a fully integrated LIN transceiver complying with the LIN specification 2.0, 2.1 and SAEJ2602-2. The ATA6664 is an identical version, the only difference is that the TXD-dominant Time-out function is disabled so the device is able to send a static low signal to the LIN bus. It interfaces the LIN protocol handler and the physical layer. The device is designed to handle the low-speed data communication in vehicles, for example, in convenience electronics. Improved slope control at the LIN bus ensures secure data communication at up to 20 Kbaud with an RC oscillator for protocol handling. Sleep Mode guarantees minimal current consumption even in the case of a floating bus line or a short circuit on the LIN bus to GND. The ATA6663/ATA6664 feature advanced EMI and ESD performance.

ATA6663主要特性:

? Operating Range from 5V to 27V

? Baud Rate up to 20 Kbaud

? Improved Slew Rate Control According to LIN Specification 2.0, 2.1 and AEJ2602-2

? Fully Compatible with 3.3V and 5V Devices

? ATA6663: TXD Time-out Timer, ATA6664: No TXD Time-out Timer

? Normal and Sleep Mode

? Wake-up Capability via LIN Bus (90 μs Dominant)

? External Wake-up via WAKE Pin (35 μs Low Level)

? INH Output to Control an External Voltage Regulator or to Switch the Master ull-up

? Very Low Standby Current During Sleep Mode (10 μA)

? Wake-up Source Recognition

? Bus Pin Short-circuit Protected versus GND and Battery

? LIN Input Current Typically 5 μA if VBAT Is Disconnected

? Overtemperature Protection

? High EMC Level

? Interference and Damage Protection According to ISO/CD 7637

? ESD HBM 8 kV at LIN Bus Pin, Supply Pin VS and WAKE Pin According to STM5.1

圖1.ATA6663方框圖

圖2.ATA6663應用電路圖