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dc2151af
DEMO MANUAL DC2151A
connection to a Dust mote (Dc9003a-B)
Figure 5. DC2151A with Dust Mote
Attach a Dust
®
Mote to J1 of the DC2151A, refer to Figure 5
for the proper setup. J1 is a keyed connector and is
connected to the left side of the P1 connector on the DUST
Mote. Figure 13 is a schematic of the Dust Mote and the
DC2151A interconnections plus three extra connections
which 1) connect the SCAP to V
OUT
, 2) connect BAL to
the middle of the supercapacitors and 3) connect EH_ON
to OUT2. The DC2151A contains NC7SZ58P6X Universal
Configurable 2-Input logic gates that are input voltage
tolerant and allow level shifting between the LTC3331
and the Dust Mote.
Remove the battery from the BH1 holder on the bottom
side of the DC2151A. On the DC2151A, set JP1 to 1, JP2
to 0, JP3 to 1, JP4 to 0, JP5 to1, JP6 to 0, JP7 to 0, JP8,
JP9 and JP10 to 0, JP11 to RUN.
Piezoelectric Transducer Evaluation
Mount a series connected MIDE V25W to a vibration
source and connect the electrical connections to the
AC1 and AC2 turrets. Activate the vibration source to
an acceleration of 1g and a frequency of 60Hz. Figure 6
shows an open-circuit voltage of 10.6V for the MIDE V25W
piezoelectric device that was tuned to 60Hz. In order to
set the VIN_UVLO_RISING and VIN_UVLO_FALLING
thresholds, the open-circuit voltage of the piezoelectric
device must be measured. The internal bridge network of
the LTC3331 will have approximately 800mV drop at an
input current of 300µA.