QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 854 16/14 BIT, 130,105, 80, 65 MSPS ADC LTC2208, LTC2208-14, LTC2217, LTC2216, LTC2215 DDEESSCCRRIIPPTTIIOONN DDEESSCCRRIIPPTTIIOONN Demonstration circuit 854 supports a family of The versions of the DC854C and DC854D demo 16/14-Bit 130Msps ADCs. Each assembly features board that support the LTC2208 16-Bit and one of the following devices: LTC2208, LTC2208- LTC2208-14 14-Bit series of A/D converters are 14, LTC2217, LTC2216, LTC2215 high speed family listed in Table 1. Depending on the required reso- of high dynamic range ADCs. lution, sample rate and input frequency, the DC854 is supplied with the appropriate ADC and with an This Demonstration circuit only supports CMOS optimized input circuit. The circuitry on the analog operation. For demonstration of LVDS output sig- inputs is optimized for analog input frequencies be- naling, please see DC996. low 70MHz or from 70MHz to 140MHz. For higher Other members of this family include the LTC2207, a input frequencies, contact the factory for support. 105Msps 16-Bit CMOS-only version of this device, as DDDDeeeessssiiiiggggnnnn ffffiiiilllleeeessss ffffoooorrrr tttthhhhiiiissss cccciiiirrrrccccuuuuiiiitttt bbbbooooaaaarrrrdddd aaaarrrreeee aaaavvvvaaaaiiiillllaaaabbbblllleeee.... well as lower speed versions and single-ended clock CCCCaaaallllllll tttthhhheeee LLLLTTTTCCCC ffffaaaaccccttttoooorrrryyyy.... versions. These 7x7mm QFN devices are supported by LTC is a trademark of Linear Technology Corporation Demonstration circuits 918 and 919 (for single-ended clock input). 1111.... DDDDCCCC888855554444 VVVVaaaarrrriiiiaaaannnnttttssss DDDDCCCC888855554444 VVVVAAAARRRRIIIIAAAANNNNTTTTSSSS AAAADDDDCCCC PPPPAAAARRRRTTTT NNNNUUUUMMMMBBBBEEEERRRR RRRREEEESSSSOOOOLLLLUUUUTTTTIIIIOOOONNNN**** MMMMAAAAXXXXIIIIMMMMUUUUMMMM SSSSAAAAMMMMPPPPLLLLEEEE RRRRAAAATTTTEEEE IIIINNNNPPPPUUUUTTTT FFFFRRRREEEEQQQQUUUUEEEENNNNCCCCYYYY 854D-A LTC2208 16-Bit 130Msps 1MHz - 70MHz 854D-B LTC2208 16-Bit 130Msps 70MHz -140MHz 854D-C LTC2208-14 14-Bit 130Msps 1MHz - 70MHz 854D-D LTC2208-14 14-Bit 130Msps 70MHz -140MHz 854D-E LTC2217 16-Bit 105Msps 1MHz - 70MHz 854D-F LTC2217 16-Bit 105Msps 70MHz -140MHz 854D-G LTC2216 16-Bit 80Msps 1MHz - 70MHz 854D-H LTC2216 16-Bit 80Msps 70MHz -140MHz 854D-I LTC2215 16-Bit 65Msps 1MHz - 70MHz 854D-J LTC2215 16-Bit 65Msps 70MHz -140MHz 854C-P LTC2208 16-Bit 130Msps >140MHz 854C-Q LTC2208-14 14-Bit 130Msps >140MHz 1 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 854 16/14 BIT, 130,105, 80, 65 MSPS ADC 2222.... PPPPeeeerrrrffffoooorrrrmmmmaaaannnncccceeee SSSSuuuummmmmmmmaaaarrrryyyy ((((TTTT ==== 22225555CCCC)))) AAAA PPAARRAAMMEETTEERR CCOONNDDIITTIIOONN VVAALLUUEE PPAARRAAMMEETTEERR CCOONNDDIITTIIOONN VVAALLUUEE Optimized for 3.3V Depending on sampling rate and the A/D converter provided, Supply Voltage this supply must provide up to 500mA. 3.15V 3.45V min/max Analog input range Depending on PGA Pin Voltage 1.5V to 2.25V 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 (33 Series terminations) (74VCX245 output buffer, V = 2.5V) Maximum Logic Low 1.6mA 0.7V (33 Series 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 QQQQUUUUIIIICCCCKKKK SSSSTTTTAAAARRRRTTTT PPPPRRRROOOOCCCCEEEEDDDDUUUURRRREEEE Demonstration circuit 854 is easy to set up to evalu- for proper measurement equipment setup and follow ate the performance of most members of the the procedure below: LTC2208 family of A/D converters. Refer to Figure 1 SSSSEEEETTTTUUUUPPPP If a DC718 QuickDAACS Data Analysis and Collection the required software and for connecting the DC718 to System was supplied with the DC854 demonstration the DC854 and to a PC running Windows98, 2000 or circuit, follow the DC718 Quick Start Guide to install XP. 2