DC956A Analog Devices

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 956 24-BIT DIFFERENTIAL ADC WITH I2C LTC2485 DESCRIPTION Demonstration circuit 956 features the LTC2485, 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 LTC2485 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 nals can be connected to the end applications proc- 140dB. The LTC2485 is available in a 10-pin DFN essor / controller for development of the serial inter- package and has an easy to use I2C interface. face. DC956 is a member of Linear Technologys QuickEval family of demonstration boards. It is de- Design files for this circuit board are available. Call signed to allow easy evaluation of the LTC2485 and the LTC factory. may be connected directly to the target applications LTC is a trademark of Linear Technology Corporation 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 956 24-BIT DIFFERENTIAL ADC WITH I2C QUICK START PROCEDURE Connect DC956 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