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A1429

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64 Channel Charge Sensitive Preamplifier

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Features

  • 64-channel
  • Max. output voltage: +/- 4,5V Diff on 100 Ω termination
  • Sensitivities: 20, 45, 90, 200, 400mV / MeV
  • Dimension (mm): 180 x 105 X 25 mm
  • Input bias voltage (± 400 V Max) (2 LEMO-00 connector)
  • ESD input protection
  • TEST pulse input (1 LEMO-00)
  • Low power consumption (< 50 mW for ch.)
  • True Differential output (with 100 Ω Diff. back termination)
  • Noise < 5 KeV on 0 pF input and < 35 eV/pF slope
  • Rise Time < 20 ns @ 0 pF, < 60 ns @ 200 pF
More info
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Overview

Ultra high density preamplifier for big size segmented silicon and gas detector arrays

he CAEN Mod. A1429 is a 64-channel, highly integrated charge preamplifier, suitable 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 equipped with two LEMO-00 Bias inputs: one input for channels 0 to 31 and a second for channels 32 to 63.

The A1429 is available in different sensitivities: 20, 45, 90, 200, and 400 mV/MeV. The preamplifier output signals are true differential, supporting low-cost twisted flat cables for the output connection. This feature allows easy coupling of the A1429 with the new generation digitizers VX2740/VX2745, thus creating a complete chain for the readout of a segmented detector array.

The A1429 can be powered using the following devices:

  • N5424 – Quad NIM Power Distributor for Preamplifiers
  • V5425 – Quad VME Power Distributor for Preamplifiers

Technical Specifications

Packaging
  • Shielded Box
  • Dimensions (WxHxD): 180 x 105 x 25 mm3 (without connectors)
  • Weight: 900 g
Polarity
  • Positive or Negative Charge Input polarity
  • Output polarity: Differential
Max Energy Ranges (Si)

– 225 MeV (Si) @ 20 mV/MeV
– 100 MeV (Si) @ 45 mV/MeV
– 50 MeV (Si) @ 90 mV/MeV
– 22 MeV (Si) @ 200 mV/MeV
– 11 MeV (Si) @ 400 mV/MeV

Output voltage
  • Differential ± 4.5 VDiff max on 100 Ω Term.
  • Max Output offset: ± 100 mV
  • Common Offset adjust on Front Panel Trimmer
Noise

Model Detector capacitance 0 pF

  • 20 mV/MeV < 5 KeV slope < 28 eV/pF
  • 45 mV/MeV < 4 KeV slope < 28 eV/pF
  • 90 mV/MeV < 4 keV slope < 28 eV/pF
  • 200 mV/MeV < 4 keV slope < 35 eV/pF
  • 400 mV/MeV < 4 keV slope < 35 eV/pF
Rise Time
  • < 20 ns @ 0 pF detector capacitance
  • < 60 ns @ 200 pF detector capacitance
Decay time
  • 20 mV/MeV 50 μs
  • 45 mV/MeV 100 μs
  • 90 mV/MeV 50 μs
  • 200 mV/MeV 22 μs
  • 400 mV/MeV 11 μs
DETECTOR INPUT
  • Accepts positive and negative input charge pulses from semiconductor detectors and supplies the HV bias to the detector itself; Detector input (AC coupled) – 22 MΩ to HV-IN
  • ESD input protection
  • Samtec ERF8-040-01-L-D-RA-L-TR connector
  • A3429: Adapter to Nr. 4 17×2, 2.54 mm male Header Connectors
  • Micro-coax cable ERCD series available from Samtec
HV-IN
  • HV BIAS input / Detector bias voltage
  • ± 400 V Max
  • Nr.2 LEMO-00 connector
  • HV-IN[0:31] for ch. 0 to 31
TEST IN

HV-IN[32:63] for ch. 32 to 63
Positive or negative input for the energy calibration via Ctest

  • 20 mV/MeV 2.2 pF
  • 45/90 mV/MeV 1 pF
  • 200/400 mV/MeV 0.5 pF

Nr.1 LEMO-00 connector 50 Ω on request

POWER IN

Power supply input connector
Power supply voltage:

  • pin 1 +6 VDC
  • pin 2 GND
  • pin 3 -6 VDC

DMini XRL 3 Pin Male connector
An adapter cable from DMini XLR to DType 9-pin connector is supplied in the kit.

  • length: 3 m
  • pin 1,2 GND
  • pin 3 +6 VDC
  • pin 5 -6 VDC
DIFFERENTIAL OUTPUTS
  • Amplifier Out
  • Differential ± 4.5 VDiff max
  • 100 Ω Diff. back termination
  • Nr. 4 connectors: Header with Latches 17+ 17 pins (male) pitch 2.54 mm
Power Requirements
  • +6 V < 350 mA (no load)
  • -6 V < 195 mA (no load)
Energy Sensitivity

20, 45, 90, 200, 400 mV/MeV (Si)

Environmental

Indoor use

Compare

Compare with Charge Sensitive Preamplifiers.

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Accessories

A952
Cable assembly 2.54mm 34 pin female to 2.54mm 34 pin female - 50 cm
A3429
64 channel Adapter to 2.54mm Male Header Connector

Ordering Options

Code Description
WA1429X020AA A1429x020 - 64 Ch. Charge Sensitive Preamplifier 20 mV/MeV   RoHS
WA1429X045AA A1429x045- 64 Ch. Charge Sensitive Preamplifier 45 mV/MeV   RoHS
WA1429X090AA A1429x090- 64 Ch. Charge Sensitive Preamplifier 90 mV/MeV   RoHS
WA1429X400AA A1429x400- 64 Ch. Charge Sensitive Preamplifier 400 mV/MeV   RoHS
WA1429X200AA A1429x200- 64 Ch. Charge Sensitive Preamplifier 200 mV/MeV   RoHS

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