A. Mekkaoui, G. Cancelo, D. Christian, J. Hoff,  S. Zimmerman, R. Yarema 

Fermilab 
!!
In the last workshop we presented two papers. One about our first protoype pixel RO chip (FPIX0) and one about a proposed high speed RO chip (FPIX1). FPIX1 has been designed and fabricated in the Hp 0.5u process. In this workshop we follow up by presenting our recent results.
FPIX1 is a 160X18 RO chip capable of both triggered and non-triggered operations with a set of programmable features. The high speed non-triggered operation is for the mode where the pixels are used for the level 1 trigger operation. The analog front-end integrates a true two bit flash ADC on the cell. The readout architecture, while similar in some aspects to others, is novel to the best of our knowledge. 
The chip has been tested and found to perform as expected with minor exceptions. The main results are as follows:

Noise: 50e- (mean) 60e- (Maximum). 
Minimum threshold: 1500e- (for the entire array with the RO working) 
Threshold control: 0-infinity. 
Threshold dispersion: 350e- rms, without correction. Include some systematic effects.
Dynamic range: 32000e-.
Timewalk: < 80ns (250e- above threshold).
Xtlak: not detectable (without a detector).
Maximum RO speed: 31 ns/pixel
Pixel skip rate: 190ps/pixel (5.2GHz !)


Efforts are under way to bump bond FPIX1 to an ATLAS single chip detector and also to fabricate a 5X1 demonstrator module. Results will be availabe at the time of the workshop. Some beam tests for both FPIX0 and FPIX1 are expected to be available at that time. 

!!
In the last workshop we presented two papers. One about our first protoype pixel RO chip (FPIX0) and one about a proposed high speed RO chip (FPIX1). FPIX1 has been designed and fabricated in the Hp 0.5u process. In this workshop we follow up by presenting our recent results.
FPIX1 is a 160X18 RO chip capable of both triggered and non-triggered operations with a set of programmable features. The high speed non-triggered operation is for the mode where the pixels are used for the level 1 trigger operation.
The main results are as follows:

Noise: 50e- (mean) 60e- (Maximum). 
Minimum threshold: 1500e- (for the entire array with the RO working) 
Threshold control: 0-infinity. 
Threshold dispersion: 350e- rms, without correction. Include some systematic effects.
Dynamic range: 32000e-.
Timewalk: < 80ns (250e- above threshold).
Xtlak: not detectable (without a detector).
Maximum RO speed: 31 ns/pixel
Pixel skip rate: 190ps/pixel (5.2GHz !)

!!