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IDE1162

32 CSAs with Pre‐amplifier Outputs, Sample‐and‐Hold and Multiplexer Output

The IDE1162 is an application specific integrated circuit (ASIC), which has been designed for the front-end readout of ionizing radiation detectors, e.g., silicon strip sensors and wire-chambers. The chip has 32 inputs of charge sensitive pre-amplifiers (CSA) and 32 pre-amplifier outputs, which can be connected directly to a triggering chip, e.g., TA32cg3. Each pre-amplifier output is connected to a shaper with 2-μs to 2.5-μs shaping time. All shaper outputs can be sampled simultaneously and the pulse heights can be multiplexed sequentially to the analogue output buffer. The chip can be used with negative and positive charges in the range from -1.5pC to +1.5pC. The equivalent noise charge is 1900e without load, and 2000e at 50pF input load. The integral linearity is 1% and 3% for positive and negative charge, respectively.
The chip requires positive and negative supply voltages (-2V, +1.5V) and generates all bias currents internally. However, one can also apply bias currents externally, if needed. The total power is 57mW in steady state and 66mW maximum, depending on the readout rate. The chip allows one to test and measure its gain by injection of an external calibrated charge. All amplifier inputs are protected by diodes against over-voltage and electro-static discharge (ESD).

Keywords: Ionizing radition detectors, silicon strip sensor, wire chambers

Product Features

DetectorsSilicon (Si)
ApplicationCalorimetry, Spectroscopy
Number of inputs32
Input charge range±1.5 pC
Shaping time2 µs to 2.5 μs
Nominal capacitive load50 pF
Equivalent Noise Charge (ENC)1900e + 2e/pF
OutputsMultiplexed pulse height
Test and calibrationCalibration circuit and internal reference channel

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