Hardware Setup - Linear Technology DC1678A Demo Manual

QUICK START PROCEDURE
HARDWARE SET-UP
Jumpers
REF – V Select. This jumper selects which mode the
REF
LTC2654 powers up in: External reference (EXT) or Internal
reference (INT).
PORSEL – Power Up Mode. The LTC2654 can be set to
either power up in Mid Scale or Zero Scale.
Analog Connections
DAC outputs – The 4 DAC outputs from the LTC2654 are
brought out to turrets labeled VOUTA through VOUTD.
These may be connected to external instruments or other
circuitry.
NOTE: DAC outputs are not in alphabetical order on the
circuit board.
V – The V turret is connected directly to the refer-
REF REF
ence terminals of the LTC2654. The on-chip reference may
be turned off, allowing the DAC reference pin to be driven
from this turret. Alternatively, when the on-chip reference
is on and active, the voltage can be monitored at this turret.
+
V – Unregulated 10V is present here when a DC590 is
connected. This turret is provided for monitoring purposes
only and should not be connected to any other turrets on
the board.
DEMO MANUAL DC1678A
Grounding and Power Connections
Power (V ) – Normally the DC1678A is powered by
CC
the DC590 controller. V
CC
however the power supply on DC590 must be disabled.
Refer to DC590 Quick Start Guide for more details on this
mode of operation.
Grounding – There are 3 ground turrets provided (labeled
GND), as well as ground strips on the top and the bottom
of the board.
can be supplied to this turret,
dc1678af
3