I am wondering if the input to the reference input pin needs to be AC coupled? The drawing for the input sensitivity test seems to indicate it should be, but in the data sheet says to just connect it to a tcxo. Also what should the output of the tcxo…
Other Parts Discussed in Thread: LMX2487 Hallo, Our customer is now evaluating the RF Digital Lock Detect Operation of the LMX2487. RF PLL comparison frequency is 25MHz. The LMX2487 datasheet mentions “ It is recommended that this bit (DIV4) be enabled whenever…
Other Parts Discussed in Thread: LMX2487 I am using the LMX2487 as a programmable divider. I only use the RF PLL and turn off the IF PLL. I also don't use the fractional mode and always set the RF_FN to 0 and RF_FD to 0xFFF. I set the mux out to be…
Darren,
1) Yes, this is a typo in the datasheet, max frequency should be 7500 MHz;
2) for the N divider value, this is a mathematically abstracted value that is the combination of RF_N, RF_FN, and RF_FD. RF_A, RF_B, and RF_C are further sub-dividers…
Danilo,
We can consult the chart used to design the USB2ANY-uWIRE to confirm the connections:
USB2ANY-uWIRE Chart.xls
I generated the simplified table below for jumper wiring:
FUNCTION
EVM pin
USB2ANY pin
Readback
1
3
CLK
2
8
DATA
4
4
LE
6
…
Part Number: LMX2485 Other Parts Discussed in Thread: , LMX2487E , LMX2487 , LMX2486
Hello
My customer had been using MB15E03SL(Cypress(Fujitusu)) fro their portable radio, but MB15 became EOL.
They are considering to replace FY2018 model now.
I had suggested…
Hi Kanji-san,
If you just want to check programming, OSCin is not needed. However, if you want the PLL locks to the VCO, OSCin must be there.
Right now, your problem is programming never succeed. I assume the EVM comes with a USB2ANY and a USB2ANY-uWIRE…
