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Table of Contents
DESCRIPTION
The LTC
®
2418 is a high resolution, 24-bit ΔΣ 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
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.
DEMO MANUAL DC571A
8-/16-Channel Differential
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
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.
Figure 1. DC590 Program
LTC2418
∆Σ
24-Bit
ADC
dc571af
1
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Summary of Contents for Linear Technology LTC2418
- Page 1 It is designed to allow easy evaluation of the LTC2418 and L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and may be connected directly to the target application’s analog QuikEval is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.
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Page 2: Hardware Setup
JP5. EXPERIMENTS Figure 2 shows a number of applications for the LTC2418. Channel 7 measures the output of a resistive attenuator. CH0, CH1, CH2... - Page 3 DEMO MANUAL DC571A EXPERIMENTS Figure 2. LTC2418 Applications dc571af...
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Page 4: Parts List
R4, R3 RES, CHIP 4.99k 1/16W 1%, 0603 AAC, CR16-4991FM RES, CHIP 10k 1/16W 5%, 0603 AAC, CR16-103JM IC, LTC2418CGN, SSOP16GN LINEAR TECHNOLOGY, LTC2418CGN IC, NC7SZ157P6X, SC70-6P FAIRCHILD SEMI, NC7SZ157P6X IC, 24LC025, TSSOP-8 MICROCHIP , 24LC025-I /ST IC, NL17SZ74US, US8... -
Page 5: Schematic Diagram
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. - Page 6 Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods.
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