Hardware Setup - Linear Technology DC1529A Manual

HarDware setup

Jumpers
JP1: VREF Select. Either an Internal or External reference
can be selected. To drive through the VREF pin, set to Ex-
ternal and connect a clean reference voltage to the VREF
turret. Default is the internal reference.
JP2: Power-Up Mode. The LTC2657 can be set to either
power-up in mid-scale or zero-scale. Default is zero-scale.
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JP3, JP4, JP5: I C Address Selection Jumpers. Set ad-
dress here and double check that the address selected in
software matches. By default all jumpers are tied to GND.
Analog Connections
DAC Outputs: The eight DAC outputs from the LTC2657
are brought out to turrets labeled VOUTA through VOUTH.
These may be connected to external instruments or other
circuitry.
Note: DAC outputs are not in alphabetical order on the
circuit board.
VREF: The VREF turret is connected directly to the reference
DEMO MANUAL DC1529A
terminals of the LTC2657. When the onboard reference
is being used, the reference voltage may be monitored at
this point. An external reference may also be applied to
this turret after setting JP1 to External.
Grounding and Power Connections
Power (V ): Normally DC1529A is powered by the DC590
CC
controller. V can be supplied to this turret, however
CC
the power supply on DC590 must be disabled! Refer to
DC590 Quick Start Guide for more details on this mode
of operation.
Grounding: There is one common ground plane on the
board. All GND pins on the LTC2657 are tied to this ground
plane through low impedance paths. Use the GND turrets
as a reference point for measurements and connections
to external circuits.Two bare ground strips are provided
on the top and the bottom of the demo board.
dc1529afa
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