HVA4

Low-noise high-voltage amplifier for piezo scanners

Nanonis HVA4
Nanonis 6-channel high voltage amplifier HVA4

The HVA4 family is a set of high voltage amplifiers designed for nano-positioning applications using piezo elements. Three different models with maximum output voltages of ±140 V, ±220 V or ±400 V let the user choose an optimal setup for the required application.

With a noise level of only 70μVrms in a bandwidth of 300kHz and at ±400 V output voltage, the HVA4 offers the lowest noise on the market in scanning probe applications an is ideally suited for low-temperature applications.

HVA4 versions

The following HVA4 versions are available:

Name part number Maximum output voltage Gain settings AUX channel bandwidth
HVA4-0214N 2011751006 ±140 V 1, 4, 7, 14 2 kHz
HVA4-0222N 2011751007 ±220 V 1, 4, 10, 22 2 kHz
HVA4-0240N 2011751008 ±400 V 1, 4, 15, 40 2 kHz
HVA4-0222F 2011751010 ±220 V 1, 4, 10, 22 1.2 MHz
HVA4-0240F 2011751011 ±400 V 1, 4, 15, 40 1.2 MHz

KEY FEATURES

  • 6-channel high voltage amplifier
  • 4 gain settings with digital read-back
  • Lowest noise and drift
  • Stable with capacitive loads, short-circuit proof
  • Optional fast output for single channel piezo motors
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MADE FOR THESE METHODS

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SPECIFICATIONS

Operation
Number of outputs

6 (+X, -X, +Y, -Y, Z, AUX)

Number of inputs

4 (X, Y, Z, AUX)

Gain selector

For X/Y, Z and AUX, manual selector, digital read back

Gain

Depending on model, 4 selectable values

Input connectors

BNC

Input coupling

DC, differential

Differential input voltage range

± 10 V

Output connectors

Souriau TRIM TRIO UTG01619S

Output coupling

DC, referenced to HVGND

Voltage range

Up ±400 V for gain 40

Performance
Differential input impedance

1 MΩ @ DC, 100 kΩ @ 2 kHz

Bandwidth

2 kHz, 10 kHz optional, 1.2 MHz for fast AUX channel

Maximum output current

27 mA (90 mA for fast AUX)

Output impedance

200 Ω (100 Ω for fast AUX)

Output noise 0.1 Hz - 10 Hz

< 1.5 μV RMS, 8 μV p-p (gain 14, input shorted)

< 2.5 μV RMS, 15 μV p-p (gain 22, input shorted)

< 5 μV RMS, 30 μV p-p (gain 40, input shorted)

Output noise 10 Hz - 300 kHz

< 35 μV RMS, 290 μV p-p (gain 14, input shorted)

< 40 μV RMS, 320 μV p-p (gain 22, input shorted)

< 65 μV RMS, 510 μV p-p (gain 40, input shorted)

Output noise density

< 420 nV/√Hz (@ 300 Hz, gain 14, input shorted)

< 550 nV/√Hz (@ 300 Hz, gain 22, input shorted)

< 1 μV/√Hz (@ 300 Hz, gain 40, input shorted)

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RELATED PRODUCTS

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APPLICATION NOTES