DC590A-1 Datasheet, PDF (1/9 Pages) Linear Integrated Systems – QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 590 USB SERIAL CONTROLLER FOR LINEAR TECHNOLOGY QUICKEVAL-TM DEMO BOARDS

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 590
USB SERIAL CONTROLLER FOR LINEAR TECHNOLOGY QUICKEVAL™ DEMO BOARDS
DESCRIPTION
Demonstration circuit 590 is a USB-based digital con-
troller with generic Serial Peripheral Interface (SPI) and
Inter Integrated Circuit (I²C™) ports. It is designed to
mate with Linear Technology’s family of QuickEval™
demonstration boards. The demo board is fully isolated
from the host PC’s ground, and in many cases no exter-
nal power source is required. The evaluation software
automatically detects which demo board is connected
and loads the appropriate control screen.
This system facilitates quick performance evaluation of a
variety of products, including ADCs, DACs, SMBus
power control products, and others.
Figure 1 shows a block diagram of DC590. Power and
digital signal connections are made via a 14-conductor
ribbon cable. In many cases the controller can provide
power for the demonstration circuit as well as digital
signals. The demonstration circuit connections are fully
isolated from the host PC’s ground (earth ground.) Four
of the fourteen ribbon-cable conductors are referred to
earth ground. Thus the isolation barrier is not designed
to withstand large potential differences.
QuickEval is a trademark of Linear Technology Corporation; I²C is a trademark of
Philips Electronics N.V.; Adobe is a trademark of Adobe Systems, Inc.
USB
PORT _DATA
I/O
DATA ISOLATION
(AGILENT HCPL-2300)
USB TO
I2C/SPI
CONTROLLER
EXTERNAL
POWER
POWER
MANAGEMENT
SWITCHER
SHUTDOWN
(JP1)
AUXILIARY
4 _{BOARD ID LINES}
v⁺
LT1761
v_cc
5V
GND
Figure 1. Block Diagram of Demonstration Circuit 590
1