Introduction
to be added
Chip carrier test
VA-RICH Power consumption
-2V current draws 34 mA, +2V current draws 5 mA. Total power comsumption is 68 mW.
Spark protection
Spark protection works, but the spark current burns the trace from pad to input transistor, which makes the channel float. In a few cases, spark burns a channel and one of its neighboring channel also. However this is acceptable.
Noise rejection
Prelimenary study shows that noises on power supply (both +2V and -2V) are amplified. The amplification peaks at 100K Hz. The maximum amplification is around 20 to 30. 🙁
VA-RICH noise
With 3pf input capacitance, the noise is about 170 electrons.
VA-RICH dynamic range
Within good linearity, the dynamic range goes from -500000 electrons to 500000 electrons.
Circuit diagram
Power supply specification
to be added