DC939A Analog Devices

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 939 24-BIT DELTA SIGMA ADC LTC2484 DESCRIPTION Demonstration circuit 939 features the LTC2484, a Controller board and supplied software to measure 24-bit high performance DS analog-to-digital con- performance. The exposed ground planes allow verter (ADC). The LTC2484 features 2ppm linearity, proper grounding to prototype circuitry. After evaluat- 0.5mV offset, and 600nV RMS noise. The input is fully ing with Linear Technologys software, the digital sig- differential, with input common mode rejection of 140 nals can be connected to the end applications proc- dB. The LTC2484 is available in a 10 pin DFN package essor / controller for development of the serial inter- and has an easy to use SPI interface. face. DC939 is a member of Linear Technologys Design files for this circuit board are available. Call QuickEval family of demonstration boards. It is de- the LTC factory. signed to allow easy evaluation of the LTC2484 and LTC is a trademark of Linear Technology Corporation may be connected directly to the target applications analog signals while using the DC590 USB Serial Figure 1. Proper Measurement Equipment Setup Monitor reference or external reference source (See Hardware Set-up) Ribbon cable To DC590 Differential Controller Input 1 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 939 24-BIT DELTA SIGMA ADC QUICK START PROCEDURE Connect DC939 to a DC590 USB Serial Controller us- voltage. Details on software features are documented ing the supplied 14-conductor ribbon cable. Connect in the control panels help menu. DC590 to host PC with a standard USB A/B cable. Tools are available for logging data, changing refer- Run the evaluation software supplied with DC590 or ence voltage, changing the number of points in the downloaded from