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Hello
Background
Customer use LMX2485E for FY18 2Q Mass Production in place of Fujitsu MB15E03SL. Customer had made their ES PCB on last week and
register setting from MCU( uWire ) works well. ( Thank you for your support)
Their usage is FinRF( 450MHz)– RF N divider(1/384)— output from Ftest/LD =1.17MHz. They do not use charge pump.
Question
Customer want to have better sensitivity by selecting Vcc as lower. ( For their experience, lower Vcc is good sensitivity as shown on Fig2)
That is to say, customer will use LMX2485E at Vcc=2.0V by their own risk, using digital interface spec.;VIH=1.6V(min).
How do you think? Customer want to have your opinion.
Best Regards
Dear Noel-san
Thank you for your reply so quickly.
Here is customer's answer.
As the result of the Customer's PCB using LMX2485E ,RF_Fin sensitivity was following.
3.3V -18dBm
3.0V -20dBm
2.6V -22dBm
2.0V -26dBm
Customer think it is obviously that to lower Vcc improve the sensitivity.
Also, customer says they had been used Fujitsu MB15E03SL( now EOL) as Vcc= 2.0 by their risk.
So customer want to have your approval ( or confirm ) about LMX2485E .
He will release their next design (CS) soon.
Would you please have your opinion?
Best Regards