DEMO MANUAL DC2071A LTC2374/LTC2373/LTC2372 16-Bit/18-Bit, 1.6Msps/1Msps/500ksps 8-Channel, SAR ADCs DESCRIPTION Demonstration circuit 2071A features the LTC 2373 family. performance such as peak-to-peak noise and DC linearity. The LTC2374/LTC2373/LTC2372 are low noise, high speed, Use the DC890 if precise sampling rates are required or to 8-channel, 16-/18-bit successive approximation register demonstrate AC performance such as SNR, THD, SINAD (SAR) ADCs. The following text refers to the LTC2373-18 and SFDR. The demonstration circuit 2071 is intended to but applies to all parts in the family, the only differences demonstrate recommended grounding, component place- being the number of bits and the maximum sample rate. ment and selection, routing and bypassing for this ADC. Operating from a single 5V supply, the LTC2373-18 has a Several suggested driver circuits for the analog inputs highly configurable, low crosstalk, 8-channel input multi- will be presented. plexer, supporting fully differential, pseudo-differential uni- Design files for this circuit board, including the polar and pseudo-differential bipolar analog input ranges. schematic and BOM, are available at The DC2071 demonstrates the DC and AC performance of DEMO MANUAL DC2071A BOARD PHOTO DEFAULT INPUT LEVELS 16V GND +16V 0V TO 4.096V 0V TO 4.096V A 8.192V DC890 0V TO 4.096V 4.096V DC590 OR DC2026 4.096V CLK 100MHz MAX 3.3V PP Figure 1. DC2071A Connection Diagram dc2071afc 2