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dc571af
DEMO MANUAL DC571A
DESCRIPTION
LTC2418
8-/16-Channel Differential
24-Bit
∆Σ
ADC
The LTC
®
2418 is a high resolution, 24-bit Δ
Σ
ADC with
5ppm INL and 5μV offset. Channel selection is programmed
through a simple serial interface. Since there is no latency,
each conversion is valid, even after a change in input
channel.
DC571A is a member of Linear Technology‘s QuikEval™
family of demonstration boards.
It is designed to allow easy evaluation of the LTC2418 and
may be connected directly to the target application’s analog
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
QuikEval is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
signals while using the DC590 USB serial controller board
and supplied software to measure performance.
After evaluating with LTC’s software, the digital signals can
be connected to the application’s processor/controller for
development of the serial interface.
Design files for this circuit board are available at
http://
www.linear.com/demo
QUICK START PROCEDURE
Connect DC571 to DC590 USB serial controller using the
supplied 14-conductor ribbon cable. Connect DC590 to
host PC with a standard USB A/B cable. Run the evalua-
tion software supplied with DC590 or downloaded from
www.linear.com/software
. The correct program will be
loaded automatically.
Click the COLLECT button to start reading the input voltage.
Click the slider at the bottom of the strip-chart display to
change the input channel being displayed. For differential
measurements, Even channel pos and odd channel pos
correspond to even channels being positive inputs or
odd channels being positive inputs, respectively. See the
LTC2418 data sheet for details of channel selection.
Tools are available for logging data, changing reference
voltage, changing the number of points in the strip-chart
and histogram, and changing the number of points aver-
aged for the DVM display.
Figure 1. DC590 Program
