QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1010 2/4 CHANNEL 24,16,16/PGA-BIT ADC WITH I2C LTC2493, LTC2489, LTC2487 DESCRIPTION Demonstration circuit 1010A-A features the LTC2493 256 and the same temperature sensor as the 2 2/4 Channel, 24-Bit ADC with I C. Key DC specifica- LTC2493. tions include 2ppm INL, 1ppm offset, 25ppm full- The DC1010 is a member of Linear Technologys scale error and 10nV/C offset drift. In the QuickEval family of Demonstration Boards. It is de- 6.8Hz/600nV mode, input normal mode rejection of RMS signed to allow easy evaluation of the LTC2493, 50Hz and 60Hz noise is better than 87dB. The LTC2489 or LTC2487. DC1010 may be connected di- LTC2493 also includes an internal temperature sensor rectly to the target applications analog signals while that is accurate to 2 degrees C over the operating using the DC590 USB Serial Controller board and temperature range. supplied software to measure performance. After The DC1010A-B features the LTC2489 16-Bit ADC evaluating with LTCs software, the digital signals can that is pin out and software compatible with the be connected to the applications processor / control- LTC2493. ler for development of the serial interface. The DC1010A-C features the LTC2487 16-Bit ADC Design files for this circuit board are available. Call that also includes a PGA with a gain range from 1 to the LTC factory. LTC is a trademark of Linear Technology Corporation Figure 1. Proper Measurement Equipment Setup 1 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1010 2/4 CHANNEL 24,16,16/PGA-BIT ADC WITH I2C QUICK START PROCEDURE Connect the DC1010 to a DC590 USB Serial Con- ferential mode and 50/60 Hz rejection settings. Se- troller using the supplied 14 conductor ribbon ca- lecting 2x Speed located at the bottom of the strip- ble. Connect DC590 to the host PC with a standard chart display will double the data output rate at the USB A/B cable. Run the evaluation software sup- expense of offset accuracy (LTC2493 and LTC2487 plied with DC590 or downloaded from only). www.linear.com. The correct program will be Tools are available for logging data, changing refer- loaded automatically. Click the COLLECT button to ence voltage, changing the number of points in the start reading the input voltage. The software allows strip chart and histogram, and changing the num- for selecting the input channel, single ended or dif- ber of points averaged for the DVM display. 2