David Hawkins just reminded me that my numbers are for an iADC v1.1 Board
which is powered up.
The powered off case is different.
The analog inputs have ESD protection diodes which will protect,
with the 50 ohm load to ground, the functional input circuitry.
I don't know the actual limits so I'll guess using the specified
GND -0.4V limit which maps to
about +2 dBm CW or about -11 dBm gaussian noise (CF = 6).
On Wed, 24 Mar 2010, Matt Dexter wrote:
For iADC v1.1 I've measured full scale -2 dBm 630 MHz CW or
-14 dBm for 530-730 MHz wide band gaussian noise.
Sample clock of 838.8608 MHz for both.
Your milage may vary.
Absolute maximum input voltage is +/- 1V according to the datasheet.
This is about +10 dBm CW or about -3 dBm gaussian noise (CF = 6).
Matt Dexter
On Wed, 24 Mar 2010, Jason Manley wrote:
~0dBm full scale input. Burn-out ~4dBm.
Jason
On 24 Mar 2010, at 12:34, dana whitlow wrote:
Hello,
Can someone please tell me the following:
FS input drive referred to the RF input connector, at perhaps about 500
MHz
Burnout threshold, same location and similar frequency.
Thanks much,
Dana Whitlow
Microwave Receiver Specialist
Arecibo Observatory
(787) 878-2612 ext 328
