MAXREFDES67 Datasheet, PDF (1/15 Pages) Maxim Integrated Products – Isolated power and data

System Board 6185
MAXREFDES67#: UNIVERSAL INPUT MICRO PLC
Overview
The MAXREFDES67# reference design is a complete universal analog input for industrial
applications. This unique 24-bit front-end accepts bipolar voltage and current, resistance
temperature detector (RTD) and thermocouple (TC) inputs. Built in Maxim Integrated’s
ultra-small Micro PLC form factor, the MAXREFDES67# performs with a effective
resolution up to 22.3 bits with temperature error as low as ±0.1% across a range of -40°C
to 150°C.
To enhance ease of use, the innovative system architecture switches all signals on board,
meaning that the connector requires no jumpers or additional connections, regardless of
the type of connection. In addition, the system features Maxim Integrated’s Beyond-the-
Rails feature in all signal-chain elements. Beyond the Rails reduces the need for large
power supplies, allowing each element to accept large input voltages while running from a
low-voltage power rail.
The board features a micro USB connector for quick connection to a PC for evaluation. In
addition, the board requires a 24V power supply, from a power supply or from the included
AC/DC wall adapter. Refer to the Details tab for more information and performance data.
Design files and firmware can be downloaded from the Design Resources tab.
Features
• High accuracy
• -10V to +10V ±20% voltage inputs
• -20mA to +20mA ±20% current inputs
• RTD and TC tested temperature range (-40°C to +150°C)
• Software-controlled input type
• 24V input protection
• Isolated power and data