2

dc2551af

DEMO MANUAL DC2551A

Quick start proceDure

Demonstration circuit 2551A is easy to set up to evaluate

the performance of the LT1997. Refer to Figure 1 for a

suitable equipment setup and follow the procedure below:

1. Place jumpers in the following positions:

JP1, JP2 to the ENable position

JP6 to the –IN position

JP7 to the +IN position

JP11-JP13 to the SPLIT position as shown (JP11

and JP12 should generally be positioned as a set).

JP3-JP5, JP8-JP10 should be removed or connected

to just one of their posts.

2. With power off, connect the power supply positive to

+V, the supply negative to –V, and the common to GND.

The supplies should be preset in the range of ±1.7V to

±25V.

3. Connect a voltmeter or oscilloscope probe to the OUT

terminal, with the common connection or ground clip

tied to GND.

4. Connect a signal source to the +IN and –IN.

NOTE: Generators will typically be referenced to earth

ground. An AC ‘cheater’ plug may be needed if a de-

liberate offset is to be introduced with another power

supply.

5. Turn on the power supplies.

6. Check for an output voltage that is a replica of the input

signal processed with the appropriate gain.