QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 816 10/12/14 BIT 10 TO 65 MSPS DUAL ADC LTC2286, LTC2287, LTC2288, LTC2290, LTC2291, LTC2292, LTC2293, LTC2294, LTC2295, LTC2296, LTC2297, LTC2298 or LTC2299 DESCRIPTION Demonstration circuit 816 supports a family of the analog inputs is optimized for analog input fre- 10/12/14 BIT 10 TO 65 MSPS DUAL ADCs. Each quencies below 70 MHz or from 70 MHz to 140MHz assembly features one of the following devices: for 12 and 14 bit versions. The 10 bit versions are LTC2286 thru LTC2298 high speed, high dynamic configured with a wider 1MHz to 200MHz front end range ADCs. as the lower resolution 10 bit converters are not as Several versions of the 816A demo board support- sensitive to noise. For higher input frequencies, ing the LTC2286-2288 10 BIT, LTC2290-2293 12 contact the factory for support. BIT and LTC2295-2298 14 BIT series of A/D con- Design files for this circuit board are available. Call the LTC factory. verters are listed in Table 1. Depending on the re- quired resolution, sample rate and input frequency, LTC is a trademark of Linear Technology Corpora- the DC816 is supplied with the appropriate A/D and tion with an optimized input circuit. The circuitry on Table 1. DC816A Variants DC816 VARIANTS ADC PART NUMBER RESOLUTION* MAXIMUM SAMPLE RATE INPUT FREQUENCY 816A-B LTC2298 14-Bit 65Msps 1MHz - 70MHz 816A-C LTC2297 14-Bit 40Msps 1MHz -70MHz 816A-D LTC2296 14-Bit 25Msps 1MHz - 70MHz 816A-E LTC2295 14-bit 10Msps 1MHz - 70MHz 816A-G LTC2298 14-Bit 65Msps 70MHz -170MHz 816A-I LTC2293 12-Bit 65Msps 1MHz - 70MHz 816A-J LTC2292 12-Bit 40Msps 1MHz - 70MHz 816A-K LTC2291 12-Bit 25Msps 1MHz - 70MHz 816A-L LTC2290 12-Bit 10Msps 1MHz - 70MHz 816A-N LTC2293 12-Bit 65Msps 70MHz -170MHz 816A-P LTC2288 10-Bit 65Msps 1MHz - 70MHz 816A-Q LTC2287 10-Bit 40Msps 1MHz - 70MHz 816A-R 25Msps LTC2286 10-Bit 1MHz - 70MHz 1 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 816 10/12/14 BIT 10 TO 65 MSPS DUAL ADC Table 2. Performance Summary (T = 25C) A PARAMETER CONDITION VALUE Optimized for 3.0V Depending on sampling rate and the A/D converter provided, Supply Voltage this supply must provide up to 150mA. 2.7V 3.6V min/max Analog input range Depending on Sense Pin Voltage 1V to 2V PP PP Minimum Logic High 2.4V Logic Input Voltages Maximum Logic Low 0.8V Logic Output Voltage Minimum Logic High -1.6mA 2.3V (33Series terminations) (74VCX245 output buffer, V = 2.5V) Maximum Logic Low 1.6mA 0.7V (33Series terminations) cc Sampling Frequency (Convert Clock Frequency) See Table 1 Convert Clock Level 50 Source Impedance, AC coupled or ground referenced 2V 2.5V Sine Wave P-P P-P (Convert Clock input is capacitor coupled on board and ter- or Square wave minated with 50.) Resolution See Table 1 Input frequency range See Table 1 SFDR See Applicable Data Sheet SNR See Applicable Data Sheet QUICK START PROCEDURE Demonstration circuit 816 is easy to set up to evalu- The 80 Msps (LTC2299, LTC2294 and LTC2289) and ate the performance of most members of the follow-on higher sample rate versions will not be LTC229X family of Dual A/D converters LTC2286, supported by the DC718, and have a different demo LTC2287, LTC2288, LTC2290, LTC2291, LTC2292, board and higher speed data collection board. Refer LTC2293, LTC2295, LTC2296, LTC2297, or LTC2298. to Figure 1 for proper measurement equipment setup and follow the procedure below: SETUP If a DC718 QuickDATS Data Acquisition and Test Sys- required software and for connecting the DC718 to the tem was supplied with the DC816 demonstration cir- DC816 and to a PC running Windows98, 2000 or XP. cuit, follow the DC718 Quick Start Guide to install the 2