DC2443A Analog Devices

DEMO MANUAL DC2443 LT6375 Configurable High Voltage Amplifier DESCRIPTION Demonstration Circuit 2443 is a Configurable High Voltage that it can operate with high supply voltages (up to 50V). Amplifier featuring the LT 6375. Connection points are provided to wire the amplifier in other configurations besides the simple translator. This demo board translates a high common mode signal to an output related to a low voltage reference level. The The key performance characteristics of the LT6375 and demo circuit is equipped with jumpers to facilitate set- DC2443 are shown in the Performance Summary table. ting the pin-strapped internal divider ratio configuration. Design files for this circuit board are available at The LT6375 is unique in that it may be powered from a DEMO MANUAL DC2443 OPERATING PRINCIPLES The LT6375 is an op amp that includes integrated preci- some spare pads are also provided so that other more sion resistors for providing many useful high accuracy specialized configurations can be evaluated, such as preci- functions with minimal external components. As a default sion gain blocks or summing amplifiers. The demo circuit on the demo circuit, the gain is 1.000 and includes pin- also includes connector footprints for user-furnished BNC strappable common mode attenuations. Large vias and connectors if cable connectivity is desired. QUICK START PROCEDURE Demonstration Circuit 2443 is easy to set up to evalu- 3. Connect a voltmeter or oscilloscope probe to the OUT ate the performance of the LT6375. Refer to Figure1 terminal, with the common connection or ground clip for proper evaluation equipment setup and follow the tied to GND. procedure below: + 4. Connect a signal source to the IN and IN . 1. Place jumpers in the following positions: Note: Generators will typically be referenced to earth JP1 JP4, JP6 JP8 to the GND position ground. An AC cheater plug may be needed so that a deliberate offset can be introduced with another JP5 to the SPLIT position powersupply. + 2. With power off, connect the power supply positive to V , 5. Turn on the power supplies. the supply negative to V and the common to GND. The supply should be preset in the range of 1.7V to25V. 6. Check for an output voltage that is a replica of the inputsource. dc2443f 2