Anfatec Instruments AG
Measurement Science and Technology &
Scanning Probe Microscopy


- low-noise high-voltage amplifier for tube-scanners -

current Manual (PDF, 400 k)

The HV200/5 is a high-precision HV-amplifier designed for the control of tube scanners. It takes three input voltages In X, In Y and In Z (-10 V to + 10 V), amplifies them separately (input gain switches: x1, x2, x5, x10, x20) and adds an offset voltage between -10 V and +10 V. In a 2nd stage, the signal is amplified by a factor of 20. This enables its use as HV amplifier in scanning image acquisition applications, such as STM or AFM, with the capability to shift the scan range in high resolution imaging.


Supply voltage 230 V ac, 50..60 Hz

            backside of HV200/5
Power Consumption
28 W
Gain Switches x1, x2, x5, x10, x20
Offset adjustment range -200 V .. 200 V
Voltage Input
-10 V .. 10 V
Input Impedance 1,895 kOhm ± 1 %
Maximum output voltage            
- 200 V .. 200 V
Output noise < 5 µV/Hz0.5 @ 10 kHz
< 3 mVpp @ full bandwidth