EZLINX-IIIDE-EBZ Datasheet, PDF (6/15 Pages) Analog Devices – ezLINX™Hardware User Guide

iCoupler® Isolated Interface
Development Environment
ISOLATED RS-232
The Isolated RS-232 port is implemented using the ADM3252E
Signal and Power isolated RS-232 transceiver. The ADM3252E
connects to UART3 of the ADSP-BF548 and is capable of
functioning at data rates of up to 460kbit/s. Figure 6 shows a
circuit diagram of the implementation of the ADM3252E on the
ezLINX hardware.
The Isolated RS-232 JP2 jumper when fitted will implement a
loopback of the transmitter output(TOUT1) to the receiver
input(RIN1).
ezLINX™Hardware User Guide
The VCC of the ADM3252E is powered with 3.3V and will
generate an isolated 3.3V on VISO using ADI’s isoPower
technology.
A three pin screw terminal connector, J6 is used for easy access
to the TOUT1(pin 2), RIN1(pin 3) and RS232_ISO_GND(Pin
1) connections.
Figure 6. ADM3252E Isolated RS-232 Implementation
ISOLATED I²C
The Isolated I²C port is implemented using the ADuM1250 I2C
Isolator and ADuM5000 isoPower Isolated DC to DC converter.
The ADuM1250 connects to TW1 of the ADSP-BF548 and is
capable of functioning at a maximum frequency of 1MHz.
Figure 7 shows a circuit diagram of the implementation of the
ADuM1250 and ADuM5000 on the ezLINX hardware.
VDD1 of the ADuM1250 and VDD1 of the ADuM5000 is powered
by 3.3V. The ADuM5000 will generate an isolated 3.3V and is
used to supply power to VDD2 of the ADuM1250.
A three pin screw terminal connector, J22 is used for easy access
to the SDA(Pin 1), SCL(Pin 2) and I2C_ISO_GND(Pin 3)
connections.
Rev. PrA | Page 6 of 15