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ADI公司的ADM3065E是3.0V-5.5V IEC ESD保護的RS-485 收發(fā)器，其總線引腳上能經受住±12 kV接觸放電，IEC 61000-4-2≥±12 kV 空氣放電，HBM ≥ ±30 kV，數據速率50Mbps，完全符合Profibus?標準，擴展溫度到125℃ ，半雙工作，可連接多達128個節(jié)點到總線，主要用在工業(yè)現場總線，過程控制，建筑物自動化，Profibus網絡以及馬達控制伺服驅動和編碼器。本文介紹了ADM3065E主要特性，框圖和應用電路，以及評估板EVAL-ADM3061EEBZ和EVAL-ADM3061EEB1Z主要特性，電路圖，材料清單和PCB設計圖。

The ADM3065E is a 3.0 V to 5.5 V， IEC electrostatic discharge （ESD） protected RS-485 transceiver， allowing the device to withstand ±12 kV contact discharges on the transceiver bus pins without latch-up or damage. The ADM3066E features a VIO logic supply pin allowing a flexible digital interface capable of operating as low as 1.62 V.

The ADM3065E/ADM3066E are suitable for high speed， 50 Mbps， bidirectional data communication on multipoint bus transmission lines.

The ADM3061E/ADM3065E/ADM3066E feature a ? unit load input impedance， which allows up to 128 transceivers on a bus. The ADM3061E models offer all of the same features as the ADM3065E models， but at a low 500 kbps data rate suitable for operation over long cable runs.

The ADM3061E/ADM3065E/ADM3066E are half-duplex RS-485 transceivers， fully compliant to the Profibus? standard with increased 2.1 V bus differential voltage at VCC ≥ 4.5 V.

The RS-485 transceivers are available in a number of space-saving packages， such as a 10-lead， 3 mm × 3 mm LFCSP， an 8-lead， 3 mm × 3 mm MSOP， a 10-lead， 3 mm×3 mm MSOP，and an 8-lead， narrow body SOIC package. Models with operating temperature ranges of ?40℃ to +125℃ and ?40℃ to +85℃ are available.

Excessive power dissipation caused by bus contention or by output shorting is prevented by a thermal shutdown circuit. If， during fault conditions，a significant temperature increase is detected in the internal driver circuitry， this feature forces the driver output into a high impedance state.

The ADM3061E/ADM3065E/ADM3066E guarantee a logic high receiver output when the receiver inputs are shorted， open， or connected to a terminated transmission line with all drivers disabled.

ADM3065E主要特性：

TIA/EIA RS-485 compliant over full supply range

3.0 V to 5.5 V operating voltage range on VCC

1.62 V to 5.5 V VIO logic supply

ESD protection on the bus pins

IEC 61000-4-2 ≥ ±12 kV contact discharge

IEC 61000-4-2 ≥ ±12 kV air discharge

HBM ≥ ±30 kV

Full hot swap support （glitch free power-up/power-down）

High speed 50 Mbps data rate （ADM3065E/ADM3066E）

Low speed 500 kbps data rate for long cables （ADM3061E）

Full receiver short-circuit， open circuit， and bus idle fail-safe

Extended temperature range up to 125℃

Profibus compliant at VCC ≥ 4.5 V

Half duplex

Allows connection of up to 128 nodes onto the bus

Space-saving package options

10-lead， 3 mm × 3 mm LFCSP

8-lead and 10-lead MSOP

8-lead， narrow body SOIC package

ADM3065E應用：

Industrial fieldbuses

Process control

Building automation

Profibus networks

Motor control servo drives and encoders