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SKIROC 2A

PIN diode and Low Gain Silicon Detector Read-Out Chip

Features

    • Packages: BGA 400 17x17mm
    • Optimized for PIN diodes
    • Number of channels: 64
    • 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
    • Input Polarity: Positive
3 Years Warranty
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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

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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)  

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