There is a supply sequencing issue if we try to use 1.8 V for the external PNP while IOVDD = 3.3 V.
For either start-up or power-down, if the 1.8 V supply is up while the 3.3 V supply is down at ground, then the external PNP acts as a switch, passing…
Is it possible to have a single circuit with the LT1618 that outputs 3.3V with an input range of 1.8-18V?
I'm looking for a device that is capable of translating 1.8/3.3v to 3.3v.
The problem is, the circuit should be able to determine the i/o level and choose the supply voltage for translation.
I design a 1.8V power supply module with LT1764-1.8, and the input voltage is 12V.
The VIN pin and SHDN pin are connected together and they share a 10uF Capacitance.
The OUT and SENSE are connected together and they share a 10uF Capacitance.
Using several of these parts on a board. 6 out of 10 are producing 2.8V instead of 1.8V.
Yes I have verified the correct part is installed. Each of the circuits are identical except for the load.
Need help ASAP!
I ended up using an LVDS clock (IDT ICS844021-01 at 166.66 MHz) and powering the AD9106 at 1.8 V. This seems to work well.
When I was powering the AD9106 at 3.3 V, CLDO was ~1.4 V, which seemed bad. Now, when powering the chip at 1.8 V, CLDO correctly…
Here is the input specs
For 1.8v supllies DVDDIO=1.8and CVDD=1.8
ViL 0.5v max
ViH 1.2v min
For both data and the DCLKIO and CLKIN
1.8 V Q Channel or DCLKIO Falling Edge
Setup 0.25 ns
I was able to find Datasheet Page 8, DIGITAL INPUT/OUTPUT SPECIFICATIONS—1.8 V
"When VDD_IO is set to 1.8 V, all the digital video inputs and control inputs,such as I2C, HS, and VS, should use 1.8 V levels."
I am assuming this means when VDD_IO…
Could please you clarify following?
AD9520-3 contains a table below.
So provided earlier mode is not valid for the AD9520-3.
Only way to generate 1.8 GHz and 0.9 GHz is using VCO direct to output for 1.8 GHz and one of dividers for 0.9…
Thank you for your response.
for 40 MHz TCXO, from bank 34 , rakon TCXO enabled through IO_00_34_AD9361_CLKSEL( this bank voltage range is 1.2-1.8 V), one option is to remove LDO (which is used for rakon TCXO ADM7160) , and provide direct 3…