Application Note Typical Application of Isolated Output DC/DC Converters for RS-485 Communications MAXIM to Analog Devices Inc. Equivalent Models Maxim Analog Devices Inc MAX481 ADM4852 MAX483 ADM483 MAX485 ADM485 MAX487 ADM4851 See Table 1 for Aimtec DC-DC converter Selection Utilizing Isolated DC-DC converters will improve EMI performance, prevent ground loops, and provide immunity from external noise. Table 1 System Input Voltage InputOutput Isolation 1000 VDC 5VDC 3000 VDC 6000 VDC 1000 VDC 12VDC 3000 VDC 6000 VDC 1000 VDC 24VDC 3000 VDC 6000 VDC SMD Standard Power, 1 Watt Unregulated Output Regulated Output Model Case Model Case AM1S-0505SZ AM1D-0505SZ AM1P-0505SZ AM1L-0505S-NZ AM1S-0505SH30Z AM1D-0505SH30Z AM1P-0505SH30Z AM1L-0505SH30-NZ AM1D-0505SH60Z SIP4 SIP7 DIP8 SMD SIP4 SIP7 DIP8 SMD SIP7 AM1N-0505SH60-NZ AM1S-1205SZ AM1D-1205SZ AM1P-1205SZ AM1L-1205S-NZ AM1S-1205SH30Z AM1D-1205SH30Z AM1P-1205SH30Z AM1L-1205SH30-NZ AM1D-1205SH60Z AM1N-1205SH60-NZ AM1S-2405SZ AM1D-2405SZ AM1P-2405SZ AM1L-2405S-NZ AM1S-2405SH30Z AM1D-2405SH30Z AM1P-2405SH30Z DIP24 SIP4 SIP7 DIP8 SMD SIP4 SIP7 DIP8 SMD SIP7 DIP24 SIP4 SIP7 DIP8 SMD SIP4 SIP7 DIP8 AM1D-2405SH60Z SIP7 SMD SIP4 AM1DR-0505SZ AM1G-0505SZ SIP7 SIP8 AM1DR-0505SH30Z AM1G-0505SH30Z SIP7 SIP8 AM1DR-1205SZ AM1G-1205SZ SIP7 SIP8 AM1DR-1205SH30Z AM1G-1205SH30Z SIP7 SIP8 AM1DR-2405SZ AM1G-2405SZ SIP7 SIP8 AM1DR-2405SH30Z AM1G-2405SH30Z SIP7 SIP8 Case Types DIP8 Low Power, 0.25 Watt Unregulated Output Model Case AM1/4L-0505S-NZ AM1/4S-0505SZ SMD SIP4 AM1/4L-0505SH30-NZ AM1/4S-0505SH30Z SMD SIP4 AM1/4L-1205S-NZ AM1/4S-1205SZ SMD SIP4 AM1/4L-1205SH30-NZ AM1/4S-1205SH30Z SMD SIP4 AM1/4L-2405S-NZ AM1/4S-2405SZ SMD SIP4 AM1/4L-2405SH30-NZ AM1/4S-2405SH30Z SMD SIP4 SIP8 SIP7 Notes: Information furnished is believed to be accurate and reliable. However, Aimtec Inc. assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Aimtec Inc. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. Aimtec Inc. Products are not authorized for use as critical components in life support devices or systems without express written approval of Aimtec Inc. © 2006 Aimtec Inc. – All Rights Reserved A019e RS-485_K www.aimtec.com Page 1 of 1 (2008-04-01) Revision0