特點(diǎn)

High Gain of 10 V/pC

Wide Operating Range from 250 Hz to 15 MHz

Low Input Noise of 40 x 10-21 C/√Hz and 700 pV/√Hz

Optimized for Sinusoidal Signals from AC Coupled Charge Sources

應(yīng)用

Pyro- and Piezoelectric Detectors

Tuning Fork Quartz Crystals

Length Extension Resonators

Atomic Force Microscopy

Optical Measurements

Charged Particle Beam Monitoring

技術(shù)參數(shù)

測試條件                         Vs = ±15 V, Ta = 25 °C

電荷增益                         10 V/ PC       （@≥1MΩ負(fù)載）

等效電流增益                     1.6 V /μA      （@1MHz的正弦輸入信號(hào)）

增益精度                         ±3％

帶寬下限截止頻率(?3 dB)           250 Hz

帶寬上限截止頻率(?3 dB)           15 MHz (with max. 100 pF source capacitance)

輸入阻抗                         1 GΩ || 10 nF

有效的AC輸入阻抗               20 Ω            (@ 1MHz)

輸入電荷噪聲                     40 x 10-21 C/√Hz  (@ 1 MHz, with open input)

                                 90 x 10-21 C/√Hz  (@ 1 MHz, with 100 pF source capacitance)

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 10nF 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.