DC1384A-A Analog Devices

QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1384 16-BIT, DIFFERENTIAL, DELTA SIGMA ADC WITH SPI INTERFACE LTC2452 DESCRIPTION Demonstration circuit 1384 features the LTC2452, a analog signals while using the DC590 USB Serial 16 bit high performance differential DS analog-to- Controller board and supplied software to measure digital converter (ADC) with an SPI interface. The in- performance. The exposed ground planes allow put is bipolar with a range of Ref-to Ref+. The modu- proper grounding to prototype circuitry. After evaluat- lators proprietary sampling technique reduces the ing with Linear Technologys software, the digital sig- average input current to less than 50nA orders of nals can be connected to the end applications proc- magnitude lower than typical delta sigma ADCs. The essor / controller for development of the serial inter- LTC2452 is available in an 8 pin, 3x2mm DFN pack- face. age and has an easy to use SPI interface. DC1384 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 LTC2452 and LTC is a trademark of Linear Technology Corporation may be connected directly to the target applications Figure 1. Proper Measurement Equipment Setup 1 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1384 16-BIT, DIFFERENTIAL, DELTA SIGMA ADC WITH SPI INTERFACE QUICK START PROCEDURE Connect to a DC590 USB Serial Controller using the voltage. Details on software features are documented supplied 14 conductor ribbon cable. Connect DC590 in the control panels help menu. to host PC with a standard USB A/B cable. Run the Tools are available for logging data, changing refer- evaluation software supplied with DC590 or ence voltage, changing the number of points in the downloaded from