Limitations; Operating Voltage; Table 10. Analog Input Related Jumper Jp2 Settings; Figure 9. Provision For Filter Implementation - ST STM32L073Z-EVAL User Manual

UM1878
Jumpers and resistors
2 and 3 connected
(default setting)
JP2
1 and 2 connected
A low pass filter can be implemented for the DAC output by replacing R29 and C15 by
appropriate values depending on the application.
As the port PA4 can be used also as ADC input IN4, the STM32L073Z-EVAL evaluation
board gives also provision to build an input filter structure by replacing R28 and C15 by
appropriate values.
Please note that V
conversion by the ADC and the DAC. In general case, V
jumper JP5 should be closed.
7.14.1

Limitations

DAC Output is exclusive with LC sensor metering.
7.14.2

Operating voltage

DAC output is operational with V

Table 10. Analog input related jumper JP2 settings

LC sensor metering use:
PA4 is connected to the capacitor C59 to filter the DAC_OUT1 voltage for
LC sensor metering. DAC_OUT1 is connected internally to the inverting
input of the internal comparator Comp2 (refer to
metering principle
DAC output DAC_OUT1 use:
PA4 is connected to CN3 connector to be used as a DAC Output.

Figure 9. Provision for filter implementation

pin must be connected to a reference voltage to allow a proper
REF+
DD
UM1878 Rev 2
Hardware layout and configuration
Description
for more details).
REF+
>1.8 V.
Section 7.20.1: LC sensor
is connected to V
DD_MCU
, then
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