ZHCSHO6 February 2018 XTR305
PRODUCTION DATA.
The XTR305 offers voltage output mode, current output mode, external configuration, and instrumentation mode (voltage input). In addition, the internal feedback mode can be disconnected and external loop connections can be made. These modes are controlled by M1 and M2 (see Table 1). The OD input pin controls enable or disable of the output stage (OD is active low).
The digital I/O is referenced to DGND and signals on this pin must remain within 5 V of the DGND potential. This DGND pin carries the output low-current (sink current) of the logic outputs. DGND can be connected to a potential within the supply voltage but needs to be 8 V below the positive supply. Proper connection avoids current from the digital outputs flowing into the analog ground.
CAUTION
The DGND has normally reverse-biased diodes connected to the supply. Therefore, high and destructive currents could flow if DGND is driven beyond the supply rails by more than a diode forward voltage. Avoid this condition during power on and power off.