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A1422

Low Noise Fast Rise Time Charge Sensitive Preamplifiers (Boxed)

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Features

  • Fast, low noise inverting preamplifier
  • 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
  • 1, 4 and 8 channel model available
  • Up to 2 kV (positive or negative) detector bias voltage
More info
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Overview

The CAEN A1422 series are charge sensitive preamplifiers packaged in a 1/4/8 channels box. 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

The Preamplifiers are available also as 15 pin single-in-line packaged module (see Mod. A1422H).

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.

The 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.

A customization is available to improve amplifier protection from transients at detector input connection.

A1422 models can be powered using the following devices:

  • Amplifier N968 (via a D-type female connector on the rear panel)
  • DT5423 – Quad Linear Desktop Power Distributor for Preamplifiers and Digitizer
  • N5424 – Quad NIM Power Distributor for Preamplifiers
  • V5425 – Quad VME Power Distributor for Preamplifiers

Here you can find the link at the “MIRACLES detector prototypes and front-end electronics: integration, tests and some lessons learned” presented in DENIM (Design and Engineering of Neutron Instruments Meeting) on September 2023 at Forschungszentrum Jülich in Germany.

Technical Specifications

No. Of Channels

1 / 4 / 8

Packaging

Alloy Box; Dimensions (WxHxD connector included):

  • A1422Axxxx (1 ch): 40.0 x 30.0 x 124 mm3
  • A1422Bxxxx (4 ch): 100.0 x 50.0 x 162 mm3
  • A1422Cxxxx (8 ch): 100.0 x 50.0 x 162 mm3
Detector In

Accepts positive and negative input charge pulses from semiconductor detectors and supplies the HV bias to the detector itself;
SHV connector

HV Input

Up to 2 kV (positive or negative); 100 MΩ resistance in series;
SHV connector (BNC on request)

Test Input

Positive or negative input for the energy calibration via Ctest= 1 pF or 10 pF (on 5 mV/MeV versions);
LEMO-00 connector

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)

Energy sensitivity

5/45/90/400/450 mV/MeV

Power requirements - Hybrid version
Model
A1422AxxxF2 (1 ch):
A1422BxxxF2 (4 ch):
A1422CxxxF2 (8 ch):
+12 V
14 mA
55 mA
105 mA
-12 V
6 mA
25 mA
50 mA
Model
A1422AxxxF3 (1 ch):
A1422BxxxF3 (4 ch):
A1422CxxxF3 (8 ch):
+12 V
24 mA
80 mA
160 mA
-12 V
6 mA
25 mA
50 mA
Power requirements - PCB version
Model
A1422AxxxF2 (1 ch):
A1422BxxxF2 (4 ch):
A1422CxxxF2 (8 ch):
+12 V
12 mA
48 mA
96 mA
-12 V
4 mA
16 mA
32 mA
Model
A1422AxxxF3 (1 ch):
A1422BxxxF3 (4 ch):
A1422CxxxF3 (8 ch):
+12 V
20 mA
80 mA
160 mA
-12 V
4 mA
16 mA
32 mA

Compare

Compare with Charge Sensitive Preamplifiers.

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Ordering Options

Code Description
WA1422A005F2 A1422A005F2 - 1 Ch. Charge Preamplifier, 5mV/MeVgain, Cdet<200pF   RoHS
WA1422A005F3 A1422A005F3 - 1 Ch. Charge Preamplifier, 5mV/MeVgain, Cdet<1000pF   RoHS
WA1422A045F2 A1422A045F2 - 1 Ch. Charge Preamplifier, 45mV/MeVgain, Cdet<200pF   RoHS
WA1422A045F3 A1422A045F3 - 1 Ch. Charge Preamplifier, 45mV/MeVgain, Cdet<1000pF   RoHS
WA1422A090F2 A1422A090F2 - 1 Ch. Charge Preamplifier, 90mV/MeVgain, Cdet<200pF   RoHS
WA1422A090F3 A1422A090F3 - 1 Ch. Charge Preamplifier, 90mV/MeVgain, Cdet<1000pF   RoHS
WA1422A400F2 A1422A400F2 - 1 Ch. Charge Preamplifier, 400mV/MeVgain, cdet<200pF   RoHS
WA1422B005F2 A1422B005F2 - 4 Ch. Charge Preamplifier, 5mV/MeVgain, Cdet<200pF   RoHS
WA1422B005F3 A1422B005F3 - 4 Ch. Charge Preamplifier, 5mV/MeVgain, Cdet<1000pF   RoHS
WA1422B045F2 A1422B045F2 - 4 Ch. Charge Preamplifier, 45mV/MeVgain, Cdet<200pF   RoHS
WA1422B045F3 A1422B045F3 - 4 Ch. Charge Preamplifier, 45mV/MeVgain, Cdet<1000pF   RoHS
WA1422B090F2 A1422B090F2 - 4 Ch. Charge Preamplifier, 90mV/MeVgain, Cdet<200pF   RoHS
WA1422B090F3 A1422B090F3 - 4 Ch. Charge Preamplifier, 90mV/MeVgain, Cdet<1000pF   RoHS
WA1422B400F2 A1422B400F2 - 4 Ch. Charge Preamplifier, 400mV/MeVgain, Cdet<200pF   RoHS
WA1422C005F2 A1422C005F2 - 8 Ch. Charge Preamplifier, 5mV/MeVgain, Cdet<200pF   RoHS
WA1422C005F3 A1422C005F3 - 8 Ch. Charge Preamplifier, 5mV/MeVgain, Cdet<1000pF   RoHS
WA1422C045F2 A1422C045F2 - 8 Ch. Charge Preamplifier, 45mV/MeVgain, Cdet<200pF   RoHS
WA1422C045F3 A1422C045F3 - 8 Ch. Charge Preamplifier, 45mV/MeVgain, Cdet<1000pF   RoHS
WA1422C090F2 A1422C090F2 - 8 Ch. Charge Preamplifier, 90mV/MeVgain, Cdet<200pF   RoHS
WA1422C090F3 A1422C090F3 - 8 Ch. Charge Preamplifier, 90mV/MeVgain, Cdet<1000pF   RoHS
WA1422C400F2 A1422C400F2 - 8 Ch. Charge Preamplifier, 400mV/MeVgain, Cdet<200pF   RoHS
WPERS0142201 A1422A 1 Ch Preamplifier Personalization for Improved Input ESD Protection   RoHS
WPERS0142204 A1422B 4 Ch Preamplifier Personalization for Improved Input ESD Protection   RoHS
WPERS0142208 A1422C 8 Ch Preamplifier Personalization for Improved Input ESD Protection   RoHS
WA1422A001F3 A1422A001F3 - 1 Ch. Charge Preamplifier, 1mV/MeVgain, Cdet<1000pF   RoHS
WA1422B001F3 A1422B001F3 - 4 Ch. Charge Preamplifier, 1mV/MeVgain, Cdet<1000pF   RoHS
WA1422C001F3 A1422C001F3 - 8 Ch. Charge Preamplifier, 1mV/MeVgain, Cdet<1000pF   RoHS
WA1422A450F2 A1422A450F2 - 1 Ch. Charge Preamplifier, 450mV/MeVgain, cdet<200pF   RoHS
WA1422B450F2 A1422B450F2 - 4 Ch. Charge Preamplifier, 450mV/MeVgain, cdet<200pF   RoHS
WA1422C450F2 A1422C450F2 - 8 Ch. Charge Preamplifier, 450mV/MeVgain, cdet<200pF   RoHS

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