TS3005 Demo Board
To evaluate the TS3005 silicon timer, the following
steps are to be performed:
1) Before connecting the DC power supply to the
demo board, turn on the power supply, set the
DC voltage to 5V, and then turn it off.
2) Connect the DC power supply positive terminal to
the test point labeled VDD. Connect the negative
terminal of the DC power supply to the test point
labeled GND.
3) To monitor the FOUT output signal, connect the
signal terminal of an oscilloscope probe to the
test point labeled FOUT and the ground terminal
to the test point labeled GND.
4) To monitor the PWMOUT output signal, connect
the signal terminal of a second oscilloscope
probe to the test point labeled PWM_OUT and
the ground terminal to the test point labeled GND.
5) Select two channels on the oscilloscope and set
the vertical voltage scale and the vertical position
on each channel to 2V/DIV and 0V, respectively.
Set the horizontal time scale to 10ms/DIV. The
coupling should be DC coupling. Turn on the
power supply.
The supply current will vary depending on the
load on the output. Given the default set-up on
the board, the FOUT/PWMOUT output period is
approximately 47.4ms. The PWMOUT duty cycle
is set to approximately 63%. With an output load
of 15pF on both FOUT and PWMOUT outputs
due to the oscilloscope probes, the supply current
should be less than 3µA.
6) To change the period, change the combination of
FDIV2:0 via jumpers FDIV2, FDIV1, and FDIV0.
Refer to Table 2.
7) If further reduction of the duty cycle of the
PWMOUT output is desired, turn the
potentiometer clockwise. If jumper J1 is removed,
the PWM_CNTRL pin is tied to VDD and the
potentiometer will not change the PWMOUT
output duty cycle.
TS3005DB r1p0
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