FEMTO Messtechnik

HQA-15M-10T 高速チャージアンプ

HQA-15M-10T 高速チャージアンプ拡大

特 長

  • 高ゲイン 10 V/pC
  • 広帯域 250 Hz~15 MHz
  • 低ノイズ 40 x 10-21 C/√Hz@1 MHz

応 用

  • 焦電式・圧電式ディテクタ(Pyro-and Piezoelectric Detectors)
  • 音叉型水晶振動子(Tuning Fork Quartz Crystals)
  • 長辺振動型共鳴振動子(Length Extension Resonators)
  • 原子間力顕微鏡(Atomic Force Microscopy)
  • 光学測定(Optical Measurements)
  • 荷電粒子ビームモニタリング(Charged Particle Beam Monitoring)

仕 様

Model HQA-15M-10T
Charge Gain  10 V/pC (@ ≥1 MΩ load)
Equivalent Current Gain  1.6 V/A (@ 1 MHz Sinusoidal input Signal)
Gain Accuracy ±3 %
Lower Cut-off Frequency (−3 dB) 250 Hz
Upper Cut-off Frequency (−3 dB)  15 MHz (with max. 100 pF source capacitance)
Input Impedance 1 GΩ || 10 nF
Effective AC Input Impedance 20 Ω (@ 1MHz)
Input Charge Noise  40 x 10-21 C/√Hz (@ 1 MHz, with open input)
90 x 10-21 C/√Hz (@ 1 MHz, with 100 pF source
(@ 1 MHz, with open input)
Equivalent Input Current Noise  250 fA/√Hz @ 1 MHz Sinusoidal Input Signal
570 fA/√Hz (@ 1 MHz, with 100 pF source capacitance)
Input Voltage Noise  700 pV/√Hz (@ 1 MHz)
Max. Input Charge 1 pCpp
Input Impedance  1 GΩ // 1 nF
Output Voltage Range 10 Vpp (@ ≥1 MΩ load, for linear operation)
Output Impedance 50 Ω (terminate with ≥1 MΩ load for best performance)
Output Performance  typ. 20 mVpp or 3.5 mVrms
Integrated Broadband Noise ± 15 V, ± 35 mA Typ. (@ ≥1 MΩ load)
Supply Voltage ±15 V
Supply Current typ. ±35 mA (depends on operating conditions,
recommended power supply capability min. ±100 mA)
Case  Weight 200 g (0.44 lb.) Material AlMg4.5Mn, nickel-plated

General:
The amplifier is AC coupled for direct use with a charge sensor producing sinusoidal signals with no DC background. A source capacitance of less than 1 nF is recommended for proper operation. If the effective source capacitance (sensor plus cable capacitance) is small relative to the effective input impedance of the amplifier (10 nF) the amplifier acts as a virtual ground and most of the charge flows into the amplifier input. At 1 MHz the amplifier input capacitance of 10 nF corresponds to a complex input impedance of 20 Ω. An input resistor of 1 GΩ is incorporated to prevent buildup of static charge. The amplifier is not suited for sources producing an average DC background current as this would saturate the device.

※製品仕様は改良等により、予告なしに変更となる場合あります。

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