| VA64TAP:
backup read-out electronics |
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| VA64TAP
is a low-power, low-noise |
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| ASIC
with 64 channels, each with: |
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| • | preamplifier (ENC ~ 500 @ 10 pF) |
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| • | amplifier (can be switched off) |
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| • | fast CR-RC shaper (75 ns) |
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| • | discriminator with 4-bit trim-DAC |
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| • | threshold uniformity: +-200e- |
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| • | threshold nominal value: 3000e- |
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| • | power: 2.3 mW/ch. |
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| • | parallel output |
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| • | die size: 5.5mm x 5.4mm |
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| Auxiliary
chip LS64: logic level adapter, converts current logic (from |
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| VA64TAP) into
CMOS logic (0V, 2.5V - 5V). |
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| Same
lateral dimensions, direct channel to channel bonding to VA64TAP |
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