3 Years Warranty
A1422H
Low-Noise Fast-Rise-Time Charge-Sensitive Preamplifiers
Features
- Fast, low noise inverting preamplifier
- Positive or negative input signals
- Six available sensitivities (Si equivalent):
- 1 mV/MeV
- 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 A1422H series is a family of charge-sensitive preamplifiers in a single-in-line-package (SIP) format. Various sensitivity values are available, and a wide range of detector capacitances is supported:
- F2 type: up to 200 pF; sensitivities: 5, 45, 90, 400, 450 mV/MeV (Si)
- F3 type: up to 1000 pF; sensitivities: 1, 5, 45, 90 mV/MeV (Si)
Two versions of the A1422H have been produced (the full specifications of both are reported in the Tech. Spec. section):
- Hybrid version — obsolete (no longer in production)
- PCB version — current production
All models can be used in nuclear and sub-nuclear 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 with a ±4.5 V range into a 50 Ω termination (±10 V into 1 kΩ). A test input pin is also provided, accepting positive and negative signals for calibration.
CAEN also offers charge-sensitive preamplifiers based on A1422H modules (Mod. A1422), available in 1-, 4-, and 8-channel alloy boxes. These feature SHV connectors for the Input/Detector and HV bias signals, LEMO connectors for the test input and Output/Energy signals, and a cable terminated with a 9-pin D-sub male connector for the power supply.
The documentation of the Hybrid version of the A1422H is still available for the download.
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 input for energy calibration through a Ctest capacitor:
- 1 pF (standard)
- 10 pF on 5 mV/MeV version
- 47 pF on 1 mV/MeV version.
- 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; amplitude: 200 mV; 50Ω Termination) - 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; amplitude: 200 mV; 50Ω Termination) - 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 – 1 mV/MeV
F3 – 5 mV/MeV
F3 – 45 mV/MeV
F3 – 90 mV/MeV390 pF
< 10 ns
< 20 ns
< 25 ns
< 45 ns1000 pF
< 20 ns
< 40 ns
< 50 ns
< 100 ns
- Maximum Noise - Hybrid version
(Measured with a CAEN N968 Spectroscopy Amplifier and an N957 Peak-Sensing ADC; shaping time: 3 μs.) - 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
(Measured with a CAEN N968 Spectroscopy Amplifier and an N957 Peak-Sensing ADC; shaping time: 3 μs.) - 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 – 1 mV/MeV
F3 – 5 mV/MeV
F3 – 45 mV/MeV
F3 – 90 mV/MeV390 pF
< 36.0 keV
< 10.5 keV
< 5.8 keV
< 5.5 keV1000 pF
< 46.6 keV
< 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)
1/5/45/90/400/450 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
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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 |
Related Products
A1422
Low-Noise Fast-Rise-Time Charge-Sensitive Preamplifiers (Boxed)