DC1813A-C Analog Devices

DEMO MANUAL DC1813A LTC2370/LTC2369/LTC2368/ LTC2367/LTC2364: 18-Bit/16-Bit, 2Msps/1.6Msps/1Msps/ 500ksps/250ksps Low Power, Low Noise ADCs Description The LTC 2370/LTC2369/LTC2368/LTC2367/LTC2364 are such as peak-to-peak noise and DC linearity. Use the DC718 low power, low noise ADCs with serial outputs that can if precise sampling rates are required or to demonstrate operate from a single 2.5V supply. The following text refers AC performance such as SNR, THD, SINAD and SFDR. to the LTC2369-18 but applies to all parts in the family, The DC1813A is intended to demonstrate recommended the only difference being the maximum sample rates and grounding, component placement and selection, routing the number of bits. The LTC2369-18 supports a 0V to 5V and bypassing for this ADC. Several suggested driver pseudo-differential input range with a 96dB SNR, consumes circuits for the analog inputs will be presented. only 18mW and achieves 2LSB INL max with no missing Design files for this circuit board are available at codes at 18-bits. The DC1813A demonstrates the DC and DEMO MANUAL DC1813A Quick s tart p D Check to make sure that all switches and jumpers are Run the QuickEval II software (PScope.exe version K72 set as shown in the connection diagram of Figure 1. The or later) supplied with the DC718 or download it from default connections configure the ADC to use the onboard www.linear.com. reference and regulators to generate the required common Complete software documentation is available from the mode voltages. The analog input is DC-coupled. Connect Help menu. Updates can be downloaded from the Tools the DC1813A to a DC718 USB high speed data collection menu. Check for updates periodically as new features board using connector J2. Then, connect the DC718 to a may be added. host PC with a standard USB A/B cable. Apply 9V to the The PScope software should recognize the DC1813A indicated terminals. Then apply a low jitter signal source and configure itself automatically. to J4. Connect a low jitter 99.2MHz 3.3V sine wave P-P or square wave to connector J1. Note that J1 has a 50 Click the Collect button (See Figure 6) to begin acquiring termination resistor to ground. data. The Collect button then changes to Pause, which can be clicked to stop data acquisition. Table 1. Assembly Options ASSEMBLY VERSION U1 PART NUMBER MAX CONVERSION RATE NUMBER OF BITS MAX CLK IN FREQUENCY DC1813A-A LTC2370CMS-16 2Msps 16 100MHz DC1813A-B LTC2368CMS-16 1Msps 16 50MHz DC1813A-C LTC2367CMS-16 500ksps 16 25MHz DC1813A-D LTC2364CMS-16 250ksps 16 12.5MHz DC1813A-E LTC2369CMS-18 1.6Msps 18 99.2MHz DC1813A-F LTC2368CMS-18 1Msps 18 62MHz DC1813A-G LTC2367CMS-18 500ksps 18 31MHz DC1813A-H LTC2364CMS-18 250ksps 18 15.5MHz dc1813af 2 ure roce