DC1492A Analog Devices

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1492 16 BIT, DIFFERENTIAL, DELTA SIGMA ADC WITH SPI INTERFACE LTC2462 DESCRIPTION Demonstration circuit 1492 features the the DC590 USB Serial Controller board and LTC2462, a 16 bit high performance analog- supplied software to measure performance. The to-digital converter (ADC) with an SPI interface. exposed ground planes allow proper grounding The input is bipolar with a range of REF/2. to prototype circuitry. After evaluating with Lin- The modulators proprietary sampling technique ear Technologys software, the digital signals reduces the average input current to less than can be connected to the end applications proc- 50nA orders of magnitude lower than typical essor / controller for development of the serial delta sigma ADCs. interface. DC1492 is a member of Linear Technologys QuickEval family of demonstration boards. It Design files for this circuit board are avail- is designed to allow easy evaluation of the able. Call the LTC factory. LTC2462 and may be connected directly to the LTC is a trademark of Linear Technology Corporation target applications analog signals while using Figure 1. Proper Measurement Equipment Setup Ribbon ca- ble To DC590 Controller Bipolar Input 1 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1492 16 BIT, DIFFERENTIAL, DELTA SIGMA ADC WITH SPI INTERFACE QUICK START PROCEDURE Connect DC1492 to a DC590 USB Serial Con- age. Details on software features are docu- troller using the supplied 14 conductor ribbon mented in the control panels help menu. cable. Connect DC590 to host PC with a stan- Tools are available for logging data, changing dard USB A/B cable. Run the evaluation soft- reference voltage, changing the number of ware supplied with DC590 or downloaded from points in the strip chart and histogram, and