QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1133 10/12 BIT 250, 210 AND 170 MSPS ADC LTC2242-12/10, LTC2241-12/10 OR LTC2240-12/10 DESCRIPTION Demonstration circuit 1133 supports a family of 10/12 The versions of the 1133A demo board that support the BIT 250, 210 and 170 MSPS ADCs. Each assembly fea- LTC2242 family of 10 and 12-Bit A/D converters are tures one of the following devices: LTC2242-12, listed in Table 1. Depending on the required resolution LTC2241-12, LTC2240-12, LTC2242-10, LTC2241-10 or and sample rate the DC1133 is supplied with the appro- LTC2240-10 high speed, high dynamic range ADCs. priate ADC. The circuitry on the analog inputs is opti- mized for analog input frequencies from 10 MHz to 250 MHz. Design files for this circuit board are available. Call the LTC factory. LTC is a trademark of Linear Technology Corporation Table 1. DC1133A Variants DC1133 VARIANTS ADC PART NUMBER RESOLUTION MAXIMUM SAMPLE INPUT FREQUENCY RATE 1133A-A LTC2242-12 12-Bit 250Msps 10MHz < A < 250MHz IN 1133A-B LTC2241-12 12-Bit 210Msps 10MHz < A < 250MHz IN 1133A-C LTC2240-12 12-Bit 170Msps 10MHz < A < 250MHz IN 1133A-D LTC2242-10 10-Bit 250Msps 10MHz < A < 250MHz IN 1133A-E LTC2241-10 10-Bit 210Msps 10MHz < A < 250MHz IN 1133A-F LTC2240-10 10-Bit 170Msps 10MHz < A < 250MHz IN 1 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1133 10/12 BIT 250, 210 AND 170 MSPS ADC Table 2. Performance Summary (T = 25C) A PARAMETER CONDITION VALUE Depending on sampling rate and the A/D converter provided, Supply Voltage 2.5V 0.25V (10%) this supply must provide up to 500mA. Analog input range Depending on Sense Pin Voltage (at converter inputs) 1V to 2V PP PP Logic Input Voltages: OE, SHDN Minimum Logic High 1.7V Maximum Logic Low 0.7V Logic Output Voltage Minimum Logic High -3.4mA w/100W Termination 1.7V Maximum Logic Low +3.4mA w/100W Termination 0.7V Sampling Frequency (Convert Clock Frequency) See Table 1 Encode Clock Level 50 W Source Impedance. (Convert Clock input is capacitor cou- 0.2V 2.5V Sine Wave P-P P-P pled on board and terminated with 50W.) or Square wave 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 1133 is easy to set up to 10, LTC2241-10 or LTC2240-10. Refer to Figure 1 evaluate the performance of any of the LTC2242 for proper measurement equipment setup and follow family of High Speed CMOS output A/D converters - the procedure below: LTC2242-12, LTC2241-12, LTC2240-12, LTC2242- 2