1. 1 G.Pessina, RICH Elec Upg, 11 April 2010 Analog Channels per chip4 to 8 Digital channel per chip4 to 8 Wire-bond pitch (input channels) Input capacitance on channel1 -2 pF Input resistance < 50  AC or DC coupling to sensor?DC Maximum leakage current per channel <1 – 10 nA Noise< 50 Kel RMS (TOF option) < 100 Kel RMS (no TOF) Maximum crosstalk< 1 – 2 % Signal polarity of input signalNegative Signal polarity of output signalPositive (not so stringent) Dynamic range (input charge)< 10 Mel (PMT) < 4 Mel (MCP) Linearity< 5 % Power consumption per channel total < 3 mW (very front-end) < 8 mW (very front-end, shaper and discriminator) Specifications for PMT/MCP readout (I)

2. 2 G.Pessina, RICH Elec Upg, 11 April 2010 Specifications for PMT/MCP readout (II) Pre-amp peaking time< 2 ns Pre-amp rise time< 0.5 ns Pre-amp recovery time< 10 ns Shaper peaking time5 – 10 ns Shaper recovery time25 – 50 ns Pulse spill-over ??? Gain 25 mV/Mel (Selectable with  2 bits) Total ionizing radiation dose Die size Packaging for AnalogDIL Packaging for DigitalPLCC Readout scheme (analog, digital, binary) Digital: ADC bits6 - 8 Input range ADC sampling rate ADC power consumption/channel Binary: Threshold range Threshold Uniformity Timewalk

3. 3 G.Pessina, RICH Elec Upg, 11 April 2010 Specifications for PMT/MCP readout (III) Questions: Which acquisition philosophy: Trigger or trigger-less? Analog or binary? Analog and binary (namely analog just for diagnostic, then digital in running)?

4. 4 G.Pessina, RICH Elec Upg, 11 April 2010 Specifications for HPD with external readout (I) Analog Channels per chip8 to 16 Digital channel per chip8 to 16 Wire-bond pitch (input channels) Input capacitance on channel1 -2 pF AC or DC coupling to sensor?DC Maximum leakage current per channel <1 – 10 pA Noise< 200 el RMS (TOF option) <400 el RMS (no TOF) Maximum crosstalk< 0.5 – 1 % Signal polarity of input signalPositive Signal polarity of output signalPositive (not so stringent) Dynamic range (input charge)< 30 Kel Linearity< 1 % Power consumption per channel total < 3 mW (very front-end) < 8 mW (very front-end, shaper and discriminator)

5. 5 G.Pessina, RICH Elec Upg, 11 April 2010 Specifications for HPD with external readout (II) Pre-amp peaking time< 2 ns Pre-amp rise time< 0.5 ns Pre-amp recovery time< 10 ns Shaper peaking time5 – 10 ns Shaper recovery time25 – 50 ns Pulse spill-over ??? Gain10 mV/Kel Total ionising radiation dose Die size Packaging for AnalogDIL Packaging for DigitalPLCC Readout scheme (analog, digital, binary) Digital: ADC bits8 - 10 Input range ADC sampling rate ADC power consumption/channel Binary: Threshold range Threshold Uniformity Timewalk

6. 6 G.Pessina, RICH Elec Upg, 11 April 2010 Specifications for HPD with external readout (III) Same questions as before: Which acquisition philosophy: Trigger or trigger-less? Analog or binary? Analog and binary (namely analog just for diagnostic, then digital in running)?