Quick Start Procedure - Linear Technology DC1789A Demo Manual

Quick start proceDure

Demonstration circuit 1789A makes it easy to set up and
evaluate the performance of the LTM2884. Refer to Figure
2 for proper measurement equipment setup and follow
the procedure below.
NOTE: When measuring the input or output voltage ripple
or high speed signals, care must be taken to avoid a long
ground lead on the oscilloscope probe.
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DEMO MANUAL DC1789A
1. Place jumpers in their default positions:
JP1 V supply in the V
CC
JP2 V
BUS
JP3 SUSPEND POWER in the OFF position
JP4 C2 in the OUT position
NOTE: To simulate a hub/splitter output, C2 can be
jumpered IN. The additional capacitance reduces V
droop on downstream device plug-in.
2. Connect USB cable from computer to input side (J1)
of the demo board.
3. Connect computer mouse, low speed device, or USB
memory stick, typically high speed device, to output
side (J2) of demo board.
4. Verify proper operation of mouse or memory stick.
Figure 2. Demo Board Setup
position
BUS
supply in the V position
BUS
MEMORY STICK
BUS
MOUSE
dc1789afa
3