Part Number: LMK04821 Tool/software: I need an external input of 10M (OSCin) and an output of 1536M clock to the ADC chip, but there is a out of lock issue.
Testing has found that when an external input clock of 100M is used, LMK04821 can lock normally…
Part Number: LMK04821 Tool/software: Dear e2e,
The LMK04821 can be powered by two external LDO on Vcc1_VCO and Vcc9_CP2.
In that case, is there a power up sequence to follow, between these power inputs and also vs the other rails?
Regards,
Part Number: LMK04821
Tool/software:
Dear Technical Support Team,
Regarding “OSCin_FREQ” in register 0x162 of LMK04821, which of the following settings (1) or (2) is correct?
(1) Set the frequency of the OSCin/OSCin* port. (2) Set the frequency…
Takayuki,
Takayuki, I apologize for the long delay, it took me a while to track down some of these answers.
2)
We do not have any official data on setup and hold times. Setup and hold times can also vary a lot based on voltage and ambient temperature…
Part Number: LMK04821 The chip is powered normally at 3.3V.SPI communication fail. There are only resistors between the FPGA and LMK04821, without any other components. The LMK04821 is controlled by the FPGA, CSn cannot be pulled high. Changing the terminating resistor on CSn to 1K and reduci…
Hi Andrea,
Thanks for your reply.
Andrea Vallenilla said: 1. On XTAL4, even though all components are NC for pin 5 which should not cause any problems, why do you even have those spaces to potentially place components there since pin 5 is a NC pin? Why…
Part Number: LMK04832 Other Parts Discussed in Thread: LMK04821 , , LMK04828 , LMK04826 Hi,
LMK04832 is out of stock. thus we looked into LMK04821, 4826, 4828. We were recommended to 4828/26 due to pin compability.
While TI clock design tool doesn't gave…
Part Number: LMK04821 Not clear from data sheet if the clock group supplies, VCC12_CG0, VCC2_CG1, VCC4_CG2 and VCC_CG3 can be different to other supplies, i.e. can you set a clock group supply to 1.8V to match supply to device providing clock sink?
