Alkeria NECTA Series - Output Module Structure

4. Interfacing to the world 52
LTC2855
Output Port +
Output Port -
Camera GND
Output
Enable
FPGA
Data Out
NECTA camera
Figure 4.11: NECTA with 5 V tolerant output port internal structure
LTC2865
Output Port +
Output Port -
Camera GND
Output
Enable
FPGA
Data Out
NECTA camera
Figure 4.12: NECTA with 24 V tolerant output port internal structure
4.3.2 Output module structure
NECTA output ports natively support differential signaling according to the RS-422 standard and may
be used even in RS-644 and LV-TTL mode. Figure 4.11 - 4.12 shows the internal structure of an output
port. The NECTA family employs differential transceivers (p/n LTC2855-LTC2865, manufactured by
Linear Technology); to access any data not shown below, refer to the manufacturer’s datasheet.
Warning
To ensure proper operation of the output circuit, the camera reference ground
must be connected to the slave device as well.