Our customer will start to evaluate the EV-ADF5902SD1Z.
They have following questions.
Please advice to us.
1.Power control detector
In the datasheet,here it is.
"Each transmitter channel contains a power control circuit. There is also an on-chip temperature sensor."
We know an on-chip temperature sensor can be accessed on the ATEST pin or as a digital word on DOUT following an ADC conversion.
In the Figure 1 each TX OUT , the diode conect from each TX OUT to ADC.
We understand the diode detector can not be accessed, on-chip internal use only for setting the transmitter amplitude level and calibrating.
Is it correct ?
"Chip Enable. A logic low on this pin powers down the device. Taking the pin high powers up the device."
Hardware Power-Down Mode:
When CE is high to low power down, what function is power down on-chip ?
When CE is low to high power up, Initialization Sequence and Recalibration Sequence must be need ? Register setting must be re-writed ?
Software Power-Down Mode:
In the Register R0, after all functions are power-up, Initialization Sequence and Recalibration Sequence must be need ?
3.CE function @ ADF5902 GUI
Following the GUI red marking, Chip Enable is two tabs, "High/Low" and "Send".
We can not find the information for this "Send" function to use CE pin (Hardware Power-Down Mode).
What is the "Send" function ?
When is the timming to "Send" ?
"High" to "Low" and "Send" ? and "Low" to "High" and "Send" ? Each every time must be need ?
Hello, Please see following replies.
1, Yes that is correct , the detector is only accessed internally
2. A power down using CE is a hardware power down of all blocks, where you need to write the init sequence after bringing CE high
3. the "send " function writes to the ADF5902 eval board to change the logic status of CE, the CE reponds to the logic levels, after evey change you use the " send" button to change the CE logic levels, regards Brigid.
Hi Brigid - san,
Thank you for useful informations.
Sorry, one more question !
When our customer control CE pin to Hi / Lo, contacting to TP12 (CE_TX) with probe to check the status, the status of CE pin is unstable .It is keeping Hi or Lo status, no changing.Without the probe, it is able to nomal operation.
In the UG-1432 "Figure 8. EV-ADF5902SD1Z Evaluation Board Schematic (Page 3)" , it is only series R (330ohm) simple circuit.This is a behavior that we would not normally experience for other EVB.Would you advise to us what is happened ?