米6体育平台手机版

SBAU361 December 2020 ADC3664

4.1.1 ADC35XX GUI: Bypass Mode Configuration

After power up, the ADC3664EVM is preconfigured for 14 bit, 2W Bypass Mode (No Decimation). There are other modes and sample rates that can be used in Bypass Mode, and Table 4-1 shows examples of required clocks for different serialization options (1W and 1/2W). To calculate the correct DCLKIN frequency for the desired sampling rate and mode, multiply the sampling rate by the DCLKIN multiplier (Serialization factor).

Table 4-1 14-Bit, Bypass Sample Rate and DCLKIN Examples (ADC3664EVM)

Interface Mode	DCLKIN Multiplier (Serialization factor)	Example Sample Clock	Required DCLKIN Frequency
2 Wire	3.5	125 MSPS	437.5 MHz
1 Wire	7	65 MSPS	455 MHz
1/2 Wire	14	35 MSPS	490 MHz

For this 14 bit, 2-Wire example, ensure that the sampling clock (J9) and DCLKIN (J7) are connected before launching the ADC35XX EVM GUI. In this example, the sampling clock is 125 MHz, and the DCLKIN is 437.5 MHz.

Attention: External ADC sampling clock source and DCLKIN source must be frequency locked. If this is not performed, the captured data will appear scrambled. If using the onboard clocking option, the sampling clock and DCLKIN are frequency locked.

After launching the ADC35xx GUI, the below items should already be populated. If not, perform the following steps for 14 bit, 2W Bypass mode:

Under Resolution, select "14 bit".
Under Mode, select "2 Wire".
Under DDC, select "Bypass".
Enter "125M" for "Fs (MHz)".
Ensure that "CDC Enable" is red (disabled).
Click "Configure" button.

Figure 4-1 ADC35XXEVM GUI: ADC3664EVM Bypass Mode