A1442
16/32 Channel charge sensitive preamplifier
Features
- 16 channel or 32 channel Version available
- x1 or x5 sensitivity switchable via font panel jumper
- Maximum output voltage +/- 4,5 VDiff:
- 200 MeV (Si) @ 1X
- 40 MeV (Si) @ 5X
- Dimension (mm): 100 x 50 x 130
- Input bias voltage (+/- 400 V Max) (1/2 LEMO 00 connector);
- ESD input protection
- TEST pulse input with inversion or non inversion buffer (1 or 2 LEMO 00)
- Low power consumption for in vacuum use (< 1000 mW for 16 ch. version)
- True Differential output (with 100 Diff. back termination)
- 1 or 2 Sum output, each sum of 16 channel
- Noise < 5 KeV on 0 pF input and < 23 eV/pF slope
- Rise Time < 10 ns @ 0 pF, < 20 ns @ 200 pF
Overview
The CAEN Mod. A1442 is ideally suited for single or double sided multi-strip silicon detectors as well as for multi-channel detectors with common Bias. Its compact size and low power consumption make it ideal for direct detector coupling in a high vacuum system. It is available in both 16-channel (A1442A) and 32-channel (A1442B) versions.
Preamplifier output signals are in true differential supporting low-cost twisted flat cables for the output connection.
The preamplifier also provides a SUM output of the 16-channels, allowing the user to calculate the timing of pulse shape measurements of the complete strip from a single signal. Preamplifier sensitivity can be easily changed by a factor of 5 by way of a simple jumper on the front panel. The 32-channel version (A1442B) can be operated as two independent 16-channel preamplifiers with separate Voltage-Bias and Test inputs and two separate SUM outputs.
A customization is available to improve amplifier protection from transients at detector input connection.
Technical Specifications
- Packaging
- Shielded Box
- Dimension WxHxD (mm): 100 x 50 x 130
- Weight: 170 g (A1442A); 210 g (A1442B)
- No. of Channels
16 / 32
- Detector Input
- Accepts positive or negative input charge pulses from semiconductor detector and supplies the HV bias to the detector itself;
- AC coupled 22MΩ to VBIAS
- 25 pin D-SUB female connector; 1 for 16-ch (A1442A), 2 for 32-ch.(A1442B)
- ESD input protection
- VBIAS
Up to 400 V (positive or negative)
Nr. 2 LEMO 00 female connector:- A/B FOR A1442B (32-ch.)
- for A1442A (16-ch.) two inputs are wire connected
- Test
Nr. 2 LEMO 00 female connector:
- A/B FOR A1442B (32-ch.)
- for A1442A (16-ch.) two inputs are wire connected
- Differential Output
- Differential ± 4.5 VDiff max
- 100 Ω Diff. back termination
- 17+17 pin Header Male Output Connector; 1 for 16-ch. (A1442A), 2 for 32-ch. (A1442B)
- Sum Out
- Single ended, 50 Ω back termination
- +/-3.5V Max
- Each channel is summed with a weight of 0.2
- Energy ranges
Sensitivity switch, factor 5:
- 200 MeV (Si) @ 1X (20 mV/MeV)
- 40 MeV (Si) @ 5X (100 mV/MeV)
- Rise Time
< 10 ns @ 0 pF detector capacitance
< 20 ns @ 200 pF detector capacitance
- Maximum Noise
< 5 KeV on 0 pF input and < 23 eV/pF slope
- Power Connector
Power supply voltage:
- Pin 3 +6 V DC
- Pin 5 -6 V DC
D-type 9 pin male connector
- Power Requirements
- +6 V < 600 mW
- -6 V < 400 mW
- Switches
5+5 PIN HEADER 100 mils for Gain setting, Test inversion setting, Sum Output and Test termination.
Compare
Compare with Charge Sensitive Preamplifiers.
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Ordering Options
| Code | Description |
|---|---|
| WA1442A020XA | A1442A020 - 16 Ch. Charge Sensitive Preamplifiers 20 mV/MeV RoHS |
| WA1442B020XA | A1442B020 - 32 Ch. Charge Sensitive Preamplifiers 20 mV/MeV RoHS |