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dc1785bfa
DEMO MANUAL DC1785B
quick start proceDure
To zoom the graph, left click and drag. To undo any zoom
and re-initiate auto-scroll, double left click anywhere on
the graph.
tools
There are two tools included in the software package;
both are accessible under the tools menu in the software.
Statistics: The statistics window lists some basic informa-
tion about the gathered values. It gives mean, standard
deviation, min, max and crest factor. The statistics can be
reset with the reset button.
PWM: The PWM window allows the user to configure the
PWM functionality of the LTC2991. The DC1785B includes
a red LED next to the PWM turret which reflects the duty
cycle of the PWM pin. The pin needs to be enabled in this
window in order for proper functionality to be achieved.
This window also allows the user to set the PWM threshold.
Please see the LTC2991 data sheet for an explanation of
the PWM pin functionality.
HarDwarE SEt-UP
Connection to DC590 Serial Controller
J1 is the power and digital interface connector. Connect
to DC590 serial controller with supplied 14-conductor
ribbon cable.
Jumper Settings
V1, V2, V7, V8 – (Default VOLT, VOLT, VOLT, VOLT). These
jumpers can be toggled between VOLT and TEMP. VOLT
connects the corresponding input on the LTC2991 with the
corresponding turret for an external input. TEMP connects
the corresponding input to MMBT (V1 and V2). Please
note that the jumpers should be moved in pairs, V1 and
V2 should both be connected either to VOLT or TEMP and
V7 and V8 should also be both connected to either VOLT
or TEMP. Once set the proper selection should also be
made inside the QuikEval software in the mode selection
box, to reflect any changes made.
Power – (Default DC590) EXTV
CC
allows the user to
provide the V
CC
voltage (2.9V to 5V) to the LTC2991 at
turret EXTV
CC
while DC590(5V) powers the LTC2991 with
5V from the DC590. State of V
CC
can be seen through
red LED D1.
ADR0, ADR1, ADR2 – (Default LOW, LOW, LOW) These
jumpers are used to select the I
2
C address for the LTC2991.
When used with QuikEval, the correct address should also
be selected from within the software.
