1. AIDA: test plots Davide Braga Steve Thomas ASIC Design Group 22 September 2009

2. 2 1: Medium Energy (ME) + ME Input signals (voltage step capacitive-coupled) Preamp buffered output (Low-Medium Energy Channel) Trigger output “Data Ready” signal Variable medium-energy (ME) event followed after 5us by a second fixed ME event: the energy of the first event (11.75pC, 23.5pC, 35.25pC) does not affect the response to the second (11.75pC).

3. 22 September 20093 1: Medium Energy (ME) + ME Input signals (voltage step capacitive-coupled) Analog output (peak-hold multiplexed output) Trigger output “Data Ready” signal When the data ready signal is active, the correct value is present at the analogue output (after the hit has been detected and the correct address been fed into the output multiplexer). NB: the test environment is very noisy and that affects the measurements.

4. 22 September 20094 2: High Energy (HE) + ME Three high-energy (HE) events (610pC, 430pC, 250pC) followed by a ME event (28.8pC): the initial HE event does not affect the response to the second. [The roll-of of the L-ME channel preamplifier is due to the HE channel amplifier becoming active: the two are effectively in parallel. Note the Range signal changing status after the HE event] Input signals (voltage step capacitive-coupled) Preamp buffered output (Low-Medium Energy Channel) “Range” signal High = high-energy channel active “Data Ready” signal

5. 22 September 20095 2: High Energy (HE) + ME Analog output (peak-hold multiplexed output) “Data Ready” signal Although the low-medium energy channel preamp saturates, the correct value is stored and multiplexed to the Analog Output when the “Data Ready” signal is active. Preamp buffered output (Low-Medium Energy Channel)

6. 22 September 20096 3: High Energy (HE) + ME Fixed high-energy (HE) event (610pC) followed by three ME events (15pC, 30pC, 45pC): the ASIC recovers autonomously from the overload of the L-ME channel and the second event is read correctly. Input signals (voltage step capacitive-coupled) Preamp buffered output (Low-Medium Energy Channel) “Range” signal High = high-energy channel active “Data Ready” signal

7. 22 September 20097 3: High Energy (HE) + ME First value (constant) given by the High-Energy channel, second by the Medium-Energy channel. Input signals (voltage step capacitive-coupled) “Range” signal High = high-energy channel active “Data Ready” signal Analog output (peak-hold multiplexed output)