Part Number: ADC3644 Tool/software: I am using the ADC3644 in my design, paired with a low-pass filter and glitch filter as per the datasheet recommendations. However, I am observing beat frequencies in the ADC output that seem to correspond to the ADC…
Part Number: ADC3644 Tool/software: Hello, I am attempting to synchronize multiple ADC3644 and would like to know how and what signal to feed into the PDN/SYNC pins for complex decimation. I assume I must first configure it using SPI, then generate a…
Part Number: ADC3644 Tool/software: Hello, I have designed a fully differential amplifier that has an output termination equivalent to that as seen in section 8.3.1.2.3.1 (AC-coupled) of the datasheet. Disconnected, Vcm is ~900mV, however, once connected…
Part Number: ADC3644 Tool/software: Hello, I am attempting to use the RAMP test pattern function on the ADC3644 but cannot figure out what to write to each register, nor what the output pattern is supposed to look like. Currently I am writing the following…
Part Number: ADC3644 Tool/software: Hello, I am essentially attempting to design a ~1 MHz Bandwidth SDR (with I and Q outputs) and have not been able to develop a scheme to acquire the 16-bits x 2 (IQ) x 2 (Nyquist) x 1MHz = 64MHz of serial data. Currently…
Part Number: ADC3644 Other Parts Discussed in Thread: ADC3643 , I'm wondering if the ADC3644 (and the ADC3643 if it different) is monotonic. The datasheets do not mention monotonic explicitly, but it puts the DNL at 0.5 typical and max of 0.97, which…
Part Number: ADC3644 Hi team,
I use the ADC3644 with an external 1.6V reference. I attach the waveforms of each power supply and VREF. It will take some time for VREF to stabilize, but is there any problem as long as each power supply and VREF are stabilized…
Part Number: ADC3644 Other Parts Discussed in Thread: OPA837 , , REF3318 Hi team,
In the EVM of ADC3644, 1.6V of VREF is divided and supplied by REF3318 and OPA837. Is this because there was no 1.6V reference? If I use the ADC3644 with an external reference…
Part Number: ADC3644 Other Parts Discussed in Thread: ADC3664 , Dear Technical Support Team,
Do you have Comparison chart(pdf or ppt) for ADC3644(DDR CMOS or Serial CMOS) vs ADC3664(Serial LVDS).
I thought it was just the difference between DDR CMOS…
Part Number: ADC3644 I'm having trouble understanding how the output bit mapper works. On page 38 of the ADC3644 data sheet, figure 8-37, gives you an example of the output mapping. The output on the right has an example cell of D0A (0x63, 0x54). I understand…
