QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1190 3MSPS, 12-BIT, SERIAL ADC LTC2360/61/62/65/66 DESCRIPTION Demonstration circuit 1190 features the LTC2360 the DC590B Quick Eval and DC890B Fast DAACS family. With up to 3MSPS these unipolar, single data collection boards. Alternatively, by connecting channel, 12-Bit, SPI compatible serial ADCs are the DC1190 into a customer application the available in 6- or 8-Lead TSOT packages. The 8- performance of the LTC2366 can be evaluated Lead package has external V and OV pins while directly in that circuit. REF DD the 6-pin version has Vref and OV internally DD Design files for this circuit board are available. connected to the V supply pin. The following text DD refers to the LTC2366 but applies to all members Call the LTC factory. LTC is a trademark of Linear Technology Corporation of the family. DC1190 demonstrates the DC and AC performance of the LTC2366 in conjunction with Figure 1. DC1190A Connection Diagram Demo Board IC Max Clk Frequency DC1190A-A LTC2366ITS8 48MHz DC1190A-B LTC2365ITS8 16MHz DC1190A-C LTC2362ITS8 50MHz DC1190A-D LTC2361ITS8 25MHz DC1190A-E LTC2360ITS8 10MHz 1 QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1190 3MSPS, 12-BIT, SERIAL ADC DC890B QUICK START PROCEDURE Connect DC1190 to a DC890B USB High Speed Data www.linear.com. Complete software documentation Collection Board using connector J4. Connect is available from the Help menu. Updates can be DC890B to a host PC with a standard USB A/B downloaded from the Tools menu. Check for cable. Apply 5V-7V DC to the 5-7VDC and GND updates periodically as new features may be added. terminals. Apply a low jitter signal source to J1. As The Pscope software should recognize DC1190 and a clock source, apply a low jitter 10dBm sine wave configure itself automatically. or square wave to connector J2. See table on page Click the Collect button (See Figure 2) to begin 1 for maximum frequencies. Note that J2 has a 50- acquiring data. The Collect button then changes to ohm termination resistor to ground. Run the Pause, which can be used to pause data acquisition. QuickEval-II software (Pscope.exe version K51 or later) supplied with DC890B or download it from DC590B QUICK START PROCEDURE Connect DC1190 to a DC590B USB serial controller evaluation software supplied with DC590B or using the supplied 14-conductor ribbon cable. download it from www.linear.com. The correct Make sure that VCCIO of DC590B is set to 3.3V. control panel will be loaded automatically. Click the Connect DC590B to a host PC with a standard USB COLLECT (Figure 3) button to begin reading the A/B cable. Apply a signal source to J1. Run the ADC. HARDWARE SET UP SIGNAL CONNECTIONS J4 FastDAACS interface. Connect to DC890B. Do J1 SMA connector for AIN. Limit input voltage not connect to both DC590 and DC890 at the same swings to GND-V . For optimum performance, time. REF the input should be bandlimited to the VREF External V connection or it can also be REF frequencies of interest. used to monitor the internal Vref voltage. To use this pin as an external V input remove jumper REF J2 Conversion Clock Input. This input has a 50-ohm JP1. termination resistor, and is intended to be driven by EXT OVDD External OV connection. This can be a low jitter, 10dBm sine or square wave. To achieve DD used to drive the SDO output to logic levels other full AC performance of this part, the clock jitter than 3.3V. To use this pin put jumper JP2 in the should be kept under 20ps. This input is EXT position and apply desired OV voltage. capacitively coupled so that the input clock can be DD either 0V-3.3V or 1.65V so that level shifting is not JP1 Reference voltage select. Use this jumper to required. To run at the maximum conversion rate, select the ADC reference voltage. Options include apply the frequency specified in the table on page 1. 2.5V, 3.3V or an external reference voltage can be applied by removing the jumper and applying a J3 Quick Eval interface. Connect to DC590B. Make voltage to VREF. sure that VCCIO of DC590B is set to 3.3V. JP2 OV select. Set OV to 3.3V or an external DD DD voltage. 2