DC2425A-C Analog Devices

DEMO MANUAL DC2425A LTC2311/LTC2310 Single 16-Bit/14-Bit/12-Bit, 5Msps/2Msps, Serial, High Speed SAR ADCs Description Demonstration circuit 2425A features the LTC 2311 family. number of bits. The DC2425A demonstrates the DC and With up to 5Msps, these differential, single channel, 16-bit, AC performance of the LTC2311 in conjunction with the serial, high speed successive approximation register DC890 PScope data collection board. Alternatively, by (SAR) ADCs are available in a 16-lead MSOP package. connecting the DC2425A into a customer application, the The LTC2311 family has an internal 20ppm/C maximum performance of the LTC2311 can be evaluated directly in drift reference and an SPI-compatible serial interface that that circuit. supports CMOS and LVDS logic. Note the demo board is Design files for this circuit board are available at configured for CMOS operation by default see the note DEMO MANUAL DC2425A a Bly o Table 1. DC2425A Assembly Options VERSION U1 PART NUMBER MAX CONVERSION RATE OF BITS MAX CLOCK FREQUENCY DC2425A-A LTC2311CMSE-16 PBF 5Msps 16 105MHz DC2425A-B LTC2310CMSE-16 PBF 2Msps 16 42MHz DC2425A-C LTC2311CMSE-14 PBF 5Msps 14 105MHz DC2425A-D LTC2310CMSE-14 PBF 2Msps 14 42MHz DC2425A-E LTC2311CMSE-12 PBF 5Msps 12 105MHz DC2425A-F LTC2310CMSE-12 PBF 2Msps 12 42MHz Quick s tart p D n Click the Collect button (Figure 2) to begin acquiring Demonstration circuit 2425A is easy to set up and evaluate data. The Collect button then changes to Pause, which for performance. Refer to Figure 1 and follow the proce- can be used to stop data acquisition. dure below. n Connect the DC2425A to a DC890 USB high speed data collection board using edge connector P1. n Connect the DC890 to a host PC with a standard USB A/B cable. n Apply a low jitter signal source to J3 to test channel1. Note that the DC2425A is capable of accepting a differential input signal as well as a single-ended signal. See the Hardware Setup section for the jumper positions that correspond to these configurations. n As a clock source, apply a low jitter 10dBm sine wave or square wave to connector J5. See Table 1 for maximum clock frequencies. Note that J5 has a 50 termination resistor to ground. n Run the PScope software (Pscope.exe version K73, or later) supplied with the DC890 or download it from www.linear.com/software. Complete software doc- umentation is available from the Help menu. Updates can be downloaded from the Tools menu. Check for Figure 2. DC2425A PScope Screenshot updates periodically, as new features may be added. The PScope software should recognize the DC2425A and configure itself automatically. dc2425af 2 ure roce ptions ssem