QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 851 10/12/14 BIT 10 TO 105 MSPS ADC LTC2280, LTC2282, LTC2284, LTC2286, LTC2287, LTC2288 LTC2289, LTC2290, LTC2291, LTC2292, LTC2293, LTC2294, LTC2295, LTC2296, LTC2297, LTC2298 or LTC2299 DESCRIPTION Demonstration circuit 851 supports a family of put circuit. The circuitry on the analog inputs is 10/12/14 BIT 10 to 105 MSPS ADCs. Each assem- optimized for analog input frequencies below bly features one of the following devices: LTC2280 70 MHz or from 70 MHz to 140MHz. For higher thru LTC2299 high speed, high dynamic range input frequencies, contact the factory for support. ADCs. Design files for this circuit board are available. The versions of 851 demo board are listed in Table Call the LTC factory. 1. Depending on the required resolution, sample LTC is a trademark of Linear Technology Corporation rate and input frequency, the DC851 is supplied with the appropriate A/D and with an optimized in- 1 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 851 10/12/14 BIT 10 TO 105 MSPS ADC INPUT A To DC890 data ENCODE acquisition board CLOCK INPUT B Requires 3V Power Supply Figure 1. DC851 Setup DC851 DEMONSTRATION CIRCUIT BOARD JUMPERS The DC851 demonstration circuit board should have the following jumper settings as default: (as per figure 1) JP1: Mode: Vdd. 2s complement, Clock duty stabi- JP2: Sense A: Vdd, (2V P-P input range) lizer off (see data sheet for function of Mode pin.) JP3: Sense B: Vdd, (2V P-P input range) 4