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user5983069
11 days ago
Clock & timing
Clock & timing forum
LMK04828: about Direct SYSREF distribution
TI Thinks Resolved
Part Number:
LMK04828
Hello Now I try to "direct sysref mode" but It doesnt work (no output and signal fixed to LOW . input SYNC signal is High.) My Configuration is as below. (SYSREF signal is conected to Clkin0 ) 0x143 0x10 SYNC_MODE...
JH Shin
3 days ago
Clock & timing
Clock & timing forum
LMK04828: If 560 ohm is missing
TI Thinks Resolved
Part Number:
LMK04828
Hello, Please let us know what happens if 560ohm is missing from the Figure 31 below. If external 100 ohm termination is placed on the
LMK04828
side of the AC-coupling capacitors, is it not necessary to use 560 ohm as shown...
KGY
8 days ago
Clock & timing
Clock & timing forum
LMK04828: Forwarding CLKin0 to SDCLKoutY
TI Thinks Resolved
Part Number:
LMK04828
Hi, i am planning to set the
LMK04828
in nested ZDM mode + reclock clkin0 for sysref. Below in my frequency plans: Dclk = 250MHz SDclk = 6.25MHz Clkin1 = 250MHz clkin0 = 6.25MHz i set the internal SYSREF divider to...
user5856712
3 months ago
Clock & timing
Clock & timing forum
LMK04828
TI Thinks Resolved
Dear TIers, Hello! I use
lmk04828
to generate a pair of differential clocks as a differential input clock of FPGA, but the output clock amplitude is not enough to reach the trigger level. If the amplifier is used, the phase of the clock will be changed...
Venu Reddy
12 days ago
Clock & timing
Clock & timing forum
LMK04828: LMK SPI not working or not responding
Resolved
Part Number:
LMK04828
HI I am working on testing
LMK04828
B based custom board. I am not able
Keerthana U R
15 days ago
Clock & timing
Clock & timing forum
LMK04828: Loop filter calculation for LMK04828
TI Thinks Resolved
Part Number:
LMK04828
Hi Team, We are working on a new design that has
LMK04828
B in it. We understand that Ti's "Clock design tool" would help us to calculate the Loop filter values. As we are new to the TI's clock devices, we request...
Kia Rahbar
1 day ago
Clock & timing
Clock & timing forum
RE: LMK04828: Distribution mode phase noise
Hello Piet, In distribution mode, the input frequency is feed into a clock divider and then outputted from the device. Since we are only dividing the frequency in distribution mode, a much higher input frequency can be used. This is why we can use the...
Derek Payne
1 day ago
Clock & timing
Clock & timing forum
RE: LMK04828: Why the 560ohm resistor was added to the latest datasheet
Hi JH, We discovered an implementation detail of the LVDS/HSDS driver that causes difficulty when the LVDS/HSDS format is first powered up after format selection. In cases where there is no DC path for current flow between the P/N terminals of the output...
user5856712
5 months ago
Data converters
Data converters forum
LMK04828
TI Thinks Resolved
Hello, TIers! For each port of
lmk04828
, the default frequency division number is not the same, and we found that the normal frequency division range of different ports is also different. For example, when the frequency division number of dclkout10...
user5856712
5 months ago
Data converters
Data converters forum
LMK04828
TI Thinks Resolved
Hello, Tiers! We want to use
lmk04828
to generate two 2949.12MHz signals with the same frequency and phase. How should we set it? Now we use dclkout0 and sdclkout1 for output, and find that the frequency generated is different from phase. How should...
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