Dual Channel High Voltage Linear Amplifier
The Pendulum Instruments Dual Channel High Voltage Linear Amplifier A800D contains two independent A800 amplifiers that share common ground reference and power supply. This unit has a fixed amplification of 100 times and capable of bipolar high voltage output of ±400V. Any signal source with amplitude up to ±4 V can be used as an input device. The input amplitude should normally be kept within ±4 V. The A800 High Voltage Linear Amplifier is equipped with a microfuse rated at 15 mA, which will be blown if the input voltage exceeds 500% of the maximum.
The maximum speed (slew rate) of the amplifier depends on the load. If the amplifier operates within its output current limit then its speed, the slew rate, is 500 V/us. This is now the standard setting of A800-series amplifiers.
The continuous output current limit is 60 mA and the output power limit is ca 30 W. When the load requires more than 60mA current the amplifier will reduce the voltage accordingly in order to stay within the current limit.
Full and small-signal frequency responses without load and with 220 pF capacitive load, respectively, are shown in the diagram below: