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A1422H

Low Noise Fast Rise Time Charge Sensitive Preamplifiers

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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
More info
3 Years Warranty
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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/MeV
0 pF
< 10 ns
< 10 ns
< 10 ns
< 35 ns
200 pF
< 20 ns
< 35 ns
< 75 ns
< 110 ns
Model
F3 – 5 mV/MeV
F3 – 45 mV/MeV
F3 – 90 mV/MeV
390 pF
< 20 ns
< 45 ns
< 100 ns
1000 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/MeV
0 pF
< 5 ns
< 5 ns
< 10 ns
< 70 ns
< 70 ns
200 pF
< 15 ns
< 15 ns
< 25 ns
< 110 ns
< 110 ns
Model
F3 – 5 mV/MeV
F3 – 45 mV/MeV
F3 – 90 mV/MeV
390 pF
< 20 ns
< 25 ns
< 45 ns
1000 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/MeV
0 pF
< 6.6 keV
< 1.9 keV
< 1.8 keV
< 2.0 keV
200 pF
< 9,7 keV
< 4.3 keV
< 4.3 keV
< 3.6 keV
Model
F3 – 5 mV/MeV
F3 – 45 mV/MeV
F3 – 90 mV/MeV
390 pF
< 10.6 keV
< 6.5 keV
< 5.9 keV
1000 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/MeV
0 pF
< 4.7 keV
< 2.2 keV
< 2.2 keV
< 2.2 keV
< 2.2 keV
200 pF
< 7.6 keV
< 4.3 keV
< 4.2 keV
< 4.1 keV
< 4.1 keV
Model
F3 – 5 mV/MeV
F3 – 45 mV/MeV
F3 – 90 mV/MeV
390 pF
< 10.5 keV
< 5.8 keV
< 5.5 keV
1000 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

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