SKIROC 2A
PIN diode and Low Gain Silicon Detector Read-Out Chip
Features
Overview
SKIROC2A IS DEPRECATED – NOT RECOMMENDED FOR NEW DESIGN Please consider Psiroc for new design
SKIROC is a 64-channel front-end ASIC designed to readout silicon PIN diodes. Each channel is made of a variable-gain and low-noise charge preamplifier followed by two shapers – one with a gain of 1 and the other with a gain of 10 – to provide a charge measurement from 0.2 fC up to 10 pC. A time tagging is performed by a 12-bit TDC ramp. The charges and times are stored in a 15-depth Switched Capacitor Arrays (SCA), the values of which are converted by a multi-channel 12-bit Wilkinson ADC and sent to an integrated 4 Kbytes memory. The analog value of the charge is also available on an output pin. The trigger chain is composed of a high gain fast shaper and a discriminator and allows each channel to auto trigger down to 0.2 fC. Thresholds of the 64 discriminators are set by a common 10-bit DAC and an individual 4-bit DAC per channel. Each discriminator output is sent to an 8-bit delay cell (delay time tunable between 100 ns and 300 ns) to provide the Hold signal for the SCA cells of the slow channel. The power consumption is around 6.2 mW/channel and each stage can be individually shut down when not used. 616 slow control parameters are available to set various configurations and ensure the versatility of the chip.
Technical Specifications
- Detector Read-Out
Si PIN Diodes
- Number of Channels
64
- Signal Polarity
positive
- Sensitivity
Trigger on 0.2 fC
- Timing Resolution
Not relevant
- Dynamic Range
10pC
- Packaging & Dimension
BGA 400 (17x17mm)
- Power Consumption
400mW
- Inputs
64 charge inputs
- Outputs
- 1 multiplexed analog charge output that can be daisy chained
- 12-bit charge and time measurement
- Wired OR of the 64 discriminators
- Multiplexed trigger output
- Internal Programmable Features
- Common gain adjustment for the input preamps from 400fF up to 6pF (4 bits)
- common trigger threshold adjustment (10 bits) and individual threshold (4 bits)
- 12-bit charge and time measurement
- 64 trigger masks, multiplexed analog output, multiplexed trigger output
Compare
Compare with Weeroc chip.
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Ordering Options
Code | Description |
---|---|
WWSKIROC2ABA | SKIROC 2A - PIN diode and low gain silicium detector read out chip - BGA (Ball Grid Array) |