1 Overview
1.1 ADS61xx/ADS61B23 EVM Quick-Start Procedure
User's GuideSLAU206B – September 2007 – Revised April 2008
This user's guide gives a general overview of the evaluation module (EVM) and provides a generaldescription of the features and functions to be considered while using this module. This manual isapplicable to the ADS6122, ADS6123, ADS6124, ADS6125, ADS6142, ADS6143, ADS6144, ADS6145,and ADS61B23, which collectively are referred to as ADS61xx and ADS61B23. The ADS61xx/ADS61B23EVM provides a platform for evaluating the low-power, single-channel ADS61xx/ADS61B23 12- and 14-bitanalog-to-digital converters (ADC), and the ADS61B23 12-bit ADC with buffered analog input undervarious signal, reference, and supply conditions.
This document should be used in combination with the respective ADC data sheet.
Using the quick-start procedure, many users can begin evaluating the ADC in a short time. The quick-startprocedure uses the default conditions of the EVM as shipped from the factory. In addition, the quick-startguide configures the ADC in a CMOS offset binary data format. Users who have modified the board mayfind the quick-start procedure to be ineffective.
1. Supply 3.3 V to J11 while connecting the return to a shorted J11 and J14. Power on the device.
2. Confirm jumper J6 is shorted 1–2 and jumpers J2, J3, and J7 have positions 2–3 shorted.
3. Use the silkscreen to confirm jumper J1 is set to Offset Binary, CMOS output.
4. Use the silkscreen to confirm jumper J4 is set to 0dB Gain, Int Ref.
5. Supply a –1-dBFS filtered, low-phase-noise, 10-MHz CW tone into J8.
6. Supply a filtered, low-phase-noise clock to J9.
7. Use the accompanying breakout board and monitor the digital output (see Table 1 ).
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