1
Rev B
DESCRIPTION
DC1842B and DC1680B
LTC4290B/LTC4271
8-Port PSE with Digital Isolation
Demonstration kit DC1843B is an 8-port Ethernet Alliance™
certified IEEE 802.3at Type 2 power sourcing equipment
(PSE) composed of a DC1842B daughter card and DC1680B
motherboard. The kit is used for evaluation of the
PSE chipset. Up to 8 powered devices (PDs)
can be connected and powered from this system using a
single power supply. A DC590 is connected to the DC1843
for I
2
C interfacing with QuikEval™. This demonstration
manual provides a Quick Start Procedure, a DC1842B
overview, a DC1680B overview, schematics, and layout
BOARD PHOTO
printouts. Refer to the Layout Guide for Demonstration
Circuit 1842B when laying out the LTC4290B/LTC4271
circuit. Contact Analog Devices for this document.
The DC1842B has increased surge protection over the
DC1842A. The DC1680B uses discrete Ethernet transform-
ers while the DC1680A has an integrated 12-port RJ45 jack.
Design files for this circuit board are available.
All registered trademarks and trademarks are the property of their respective owners.
Summary of Contents for Analog Devices DC1680B
Page 16: ...16 Rev B DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 1 Top Layer...
Page 17: ...17 Rev B DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 2 AGND CGND Plane 1...
Page 18: ...18 Rev B DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 3 SIG AGND CGND Plane 2...
Page 19: ...19 Rev B DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 4 SIG AGND CGND Plane 3...
Page 20: ...20 Rev B DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 5 SIG AGND CGND Plane 4...
Page 21: ...21 Rev B DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Layer 6 Bottom Layer...
Page 22: ...22 Rev B DEMO MANUAL DC1843B DEMONSTRATION CIRCUIT 1680B LAYOUT Bottom Assembly ADI...