SPACIROC 3 is a 64-channel chip reading out negative fast input current pulses such as those provided by Multi Anode Photo Multipliers for space-borne and low-power applications. SPACIROC 3 counts photon individually within a Gate Time Unit (GTU).
The 64 inputs from MA-PMT Anodes are read-out by a current amplifier followed by a discriminator. Threshold of that discriminator is set by a 10b DAC and an individual 7b DAC to compensate for the non-uniformity between detector channels. Each channel provides a 100% trigger rate for signal greater than 1/3 photoelectron. The digital part operates continuously and handles data conversion of each Photon Counting channel. The digital data are transmitted through a dedicated parallel communication links within the defined Gate Time Unit (GTU). The ASIC data output rate is 40 MHz. Spaciroc is radiation tolerant and its power consumption is lower than 1 mW/channel.
- Detector Read-Out
- Number of Channels
- Signal Polarity
Trigger on 1/3 photo-electron or 50 fC with a 106 PM gain
- Timing Resolution
- Dynamic Range
Min Gate Time Unit 1.6us, max count 255 per GTU – Photon counting rate > 100MHz
- Packaging & Dimension
- Power Consumption
< 1 mW /ch, power supply: 3V
64 current inputs
8 serial data outputs (8b) for photon counting
- Internal Programmable Features
Trigger threshold adjustment (10b), Individual threshold (7b)
Compare with Weeroc chip.
|WWSPACIROC3Q||SPACIROC 3 - Photomultiplier tubes photon counting read out chip - QFP (Quad Flat Pack)|