A1422H
Low Noise Fast Rise Time Charge Sensitive Preamplifiers
Features
- Fast, low noise inverting preamplifier
- Positive or negative input signals
- Four available sensitivities (Si equivalent):
- 1 mV/MeV – COMING SOON
- 5 mV/MeV
- 45 mV/MeV
- 90 mV/MeV
- 400 mV/MeV
- 450 mV/MeV
- Up to 1000 pF detector capacitance supported
- Up to 800 V (positive or negative) detector bias voltage
Overview
The CAEN Mod.A1422H series are charge sensitive preamplifiers implemented on a single-in-line package. Various sensitivity values are available and various detectors capacitances are supported:
- F2 type: up to 200 pF; sensitivity: 5, 45, 90, 400, 450 mV/MeV(Si)
- F3 type: up to 1000 pF; sensitivity: 5, 45, 90 mV/MeV(Si) – COMING SOON : 1 mV/MeV
Two version of A1422H modules are available:
- Hybrid version (discontinued)
- PCB version (NEW)
All of them can be used in nuclear and subnuclear physics experiments, where very low noise, fast response and high counting rates are required. The modules accept both positive and negative input charge pulses and provide an energy output of ±3.5 V / ±4 V (Hybrid / PCB) range on 50 Ω termination (±8 V / ±10 V on 1 kΩ). Moreover, a test input accepts positive and negative signals for calibration purposes.
The hybrid preamplifiers are realized using a Cold Discharge Mechanism: this allows to have a low decay time value maintaining a very high feed resistance value. This technique provides good performances minimizing the pile-up in presence of moderate high counting rates.
CAEN offers charge sensitive preamplifiers (Mod. A1422) based on A1422H modules and packaged in a 1/4/8 channels boxes. A1422 are implemented into alloy boxes and feature SHV connectors for the IN/DETECTOR and HV BIAS signals, LEMO connectors for the TEST IN and ENERGY OUT and a cable with a D-type 9 pin male connector for the power supply.
Technical Specifications
- Packaging
Single in-line package hybrid (38 mm x 23 mm x 3 mm)
pin pitch: 2.54 mm; weight: 2.63 g
- No. Of Channels
1
- Detector In
Accepts positive and negative charge pulses from semiconductor detectors and supplies the HV bias to the detector itself
- HV Input
Hybrid: Up to 200 V (positive or negative) – 100 MΩ resistance in series
PCB: Up to 800 V (positive or negative) – 10 MΩ resistance in series
- Test Input
Positive or negative inputs for the energy calibration via Ctest= 1 pF (or 10 pF; sensitivity: 5 mV/MeV)
- Output
Hybrid: ± 8V max. (open circuit), 50 Ω back termination.
PCB: ± 10V max. (open circuit), 50 Ω back termination.
- Rise Time - Hybrid version (test input rise time = 1.6 ns)
- Model
F2 – 5 mV/MeV
F2 – 45 mV/MeV
F2 – 90 mV/MeV
F2 – 400 mV/MeV0 pF
< 10 ns
< 10 ns
< 10 ns
< 35 ns200 pF
< 20 ns
< 35 ns
< 75 ns
< 110 nsModel
F3 – 5 mV/MeV
F3 – 45 mV/MeV
F3 – 90 mV/MeV390 pF
< 20 ns
< 45 ns
< 100 ns1000 pF
< 35 ns
< 90 ns
< 220 ns
- Rise Time - PCB version (test input rise time = 1.6 ns)
- Model
F2 – 5 mV/MeV
F2 – 45 mV/MeV
F2 – 90 mV/MeV
F2 – 400 mV/MeV
F2 – 450 mV/MeV0 pF
< 5 ns
< 5 ns
< 10 ns
< 70 ns
< 70 ns200 pF
< 15 ns
< 15 ns
< 25 ns
< 110 ns
< 110 nsModel
F3 – 5 mV/MeV
F3 – 45 mV/MeV
F3 – 90 mV/MeV390 pF
< 20 ns
< 25 ns
< 45 ns1000 pF
< 40 ns
< 50 ns
< 100 ns
- Maximum Noise - Hybrid version
- Model
F2 – 5 mV/MeV
F2 – 45 mV/MeV
F2 – 90 mV/MeV
F2 – 400 mV/MeV0 pF
< 6.6 keV
< 1.9 keV
< 1.8 keV
< 2.0 keV200 pF
< 9,7 keV
< 4.3 keV
< 4.3 keV
< 3.6 keVModel
F3 – 5 mV/MeV
F3 – 45 mV/MeV
F3 – 90 mV/MeV390 pF
< 10.6 keV
< 6.5 keV
< 5.9 keV1000 pF
< 15.2 keV
< 11.5 keV
< 11.3 keV
- Maximum Noise - PCB version
- Model
F2 – 5 mV/MeV
F2 – 45 mV/MeV
F2 – 90 mV/MeV
F2 – 400 mV/MeV
F2 – 450 mV/MeV0 pF
< 4.7 keV
< 2.2 keV
< 2.2 keV
< 2.2 keV
< 2.2 keV200 pF
< 7.6 keV
< 4.3 keV
< 4.2 keV
< 4.1 keV
< 4.1 keVModel
F3 – 5 mV/MeV
F3 – 45 mV/MeV
F3 – 90 mV/MeV390 pF
< 10.5 keV
< 5.8 keV
< 5.5 keV1000 pF
< 21.5 keV
< 13.2 keV
< 13.2 keV
- Integral non linearity
Hybrid: <± 0.05% (0 ÷ ±8 V 1 kΩ termination)
PCB: <± 0.05% (0 ÷ ±10 V 1 kΩ termination)
- Gain drift
< ±100 ppm/°C (0 to 50°C)
- Energy sensitivity (Si equivalent)
5/45/90/400/450 mV/MeV
- Power requirements - Hybrid version
+12 V: F2:14 mA – F3: 24 mA
-12 V: F2: 6 mA – F3: 6 mA
- Power requirements - PCB version
+12 V: F2:12 mA – F3: 20 mA
-12 V: F2: 4 mA – F3: 4 mA
Compare
Compare with Charge Sensitive Preamplifiers.
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Ordering Options
Code | Description |
---|---|
WA1422H005F2 | A1422H005F2 - Charge Preamplifier Module, 5mV/MeV gain, Cdet<200pF RoHS |
WA1422H005F3 | A1422H005F3 - Charge Preamplifier Module, 5mV/MeV gain, Cdet<1000pF RoHS |
WA1422H045F2 | A1422H045F2 - Charge Preamplifier Module, 45mV/MeV gain, Cdet<200pF RoHS |
WA1422H045F3 | A1422H045F3 - Charge Preamplifier Module, 45mV/MeV gain, Cdet<1000pF RoHS |
WA1422H090F2 | A1422H090F2 - Charge Preamplifier Module, 90mV/MeV gain, Cdet<200pF RoHS |
WA1422H090F3 | A1422H090F3 - Charge Preamplifier Module, 90mV/MeV gain, Cdet<1000pF RoHS |
WA1422H400F2 | A1422H400F2 - Charge Preamplifier Module, 400mV/MeV gain, Cdet<200pF RoHS |
WA1422H001F3 | A1422H001F3 - Charge Preamplifier Module, 1mV/MeV gain, Cdet<1000pF RoHS |
WA1422H450F2 | A1422H450F2 - Charge Preamplifier Module, 450mV/MeV gain, Cdet<200pF RoHS |