DC2551A-A Analog Devices

DEMO MANUAL DC2551A LT1997 Configurable Precision Amplifier Description Demonstration Circuit 2551A is a Configurable Precision particularly high supply voltages, up to 50V. Connection Amplifier featuring the LT 1997. points are provided to wire the amplifier in other configu- rations besides those possible with the jumpers alone. The DC2551A-A supports the LT1997-3 version. The key performance characteristics of the LT1997 and This demo board provides a rapid evaluation tool with DC2551A are shown in the Performance Summary below. jumpers providing the typical interconnection options that facilitate setting the pin-strapped internal gain configura- Design files for this circuit board are available at tion. The LT1997 is unusual in that it may be powered DEMO MANUAL DC2551A Quick s tart p D Demonstration circuit 2551A is easy to set up to evaluate 3. Connect a voltmeter or oscilloscope probe to the OUT the performance of the LT1997. Refer to Figure 1 for a terminal, with the common connection or ground clip suitable equipment setup and follow the procedure below: tied to GND. 1. Place jumpers in the following positions: 4. Connect a signal source to the +IN and IN. JP1, JP2 to the ENable position NOTE: Generators will typically be referenced to earth ground. An AC cheater plug may be needed if a de- JP6 to the IN position liberate offset is to be introduced with another power JP7 to the +IN position supply. JP11-JP13 to the SPLIT position as shown (JP11 5. Turn on the power supplies. and JP12 should generally be positioned as a set). 6. Check for an output voltage that is a replica of the input JP3-JP5, JP8-JP10 should be removed or connected signal processed with the appropriate gain. 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. dc2551af 2 ure roce