F20AD
Dual Channel High Voltage Linear Amplifiers
- Category: Dual Channel High Voltage Linear Amplifiers
- Manufacturer: Pendulum Instruments
- Channels: 2 channels (sharing ground and power supply)
- Voltage gain: ×20 (fixed)
- Output voltage range: ±150 V (bipolar)
- Maximum continuous output current: 150 mA per channel (current limiting circuit included)
- Data sheet: Download PDF
- External link: Official product page
Overview
The F20AD dual-channel high voltage linear amplifier integrates two independent F20A amplifiers in one enclosure, sharing ground and power supply, making it a neat solution for applications that need two high voltage signals driven together. Built around high-speed high voltage operational amplifiers with a precision feedback network, it gives a fixed voltage gain of ×20, an output voltage range of ±150 V, a maximum continuous output current of 150 mA per channel and about 30 W of maximum output power per channel. Frequency response covers DC to 1 MHz (at 100 Vpp) and DC to 500 kHz at maximum output voltage, and the slew rate reaches 400 V/µs (with a maximum 400 pF load), so fast signals are reproduced faithfully. A current limiting circuit at the output withstands an accidental short circuit without damaging the amplifier, and a 15 mA microfuse protects the input against overvoltage. Typical applications include piezo actuator control, MEMS device drive, OLED panel test and liquid crystal display development, making it a dependable tool for high voltage broadband amplification in the laboratory.
Key features
- ±150 V bipolar high voltage output — Each channel outputs ±150 V bipolar high voltage at up to 150 mA continuous, enough to drive piezo actuators and high voltage devices that need a large voltage swing.
- DC to 1 MHz broadband response — Frequency response covers DC to 1 MHz (at 100 Vpp) and DC to 500 kHz at maximum output voltage, with a slew rate of up to 400 V/µs, reproducing fast high voltage signals precisely for dynamic drive applications.
- Two channels operating independently — Two independent amplifiers integrated in one enclosure share a ground reference and power supply, driving two independent signals at once and improving laboratory measurement throughput.
- Layered protection circuits — A current limiting circuit at the output withstands an accidental short circuit; a 15 mA microfuse at the input prevents damage when the input voltage exceeds 300% of its rating.
- Accurate fixed ×20 amplification — A precision feedback network sets a fixed ×20 voltage gain, and together with an output impedance below 0.1 Ω it drives capacitive loads with high linearity and little distortion.
- Piezo actuator and MEMS drive — Designed for capacitive loads such as piezo actuators, MEMS, OLED and liquid crystal, supporting capacitive drive up to 400 pF — an ideal tool for materials research and precision positioning systems.
Typical applications
- Driving piezo actuators and precision positioning systems — A piezo actuator needs a drive voltage of tens to hundreds of volts, yet a signal generator usually puts out only a few. Placing the F20AD between the signal generator and the piezo device, an engineer uses its fixed gain of 20 to amplify a ±10 V input to ±150 V while keeping linearity high and distortion low, securing the accuracy and repeatability of nanometre displacement control.
- Characterising MEMS devices and verifying their reliability — MEMS sensors and microactuators need high voltage excitation across a broad DC to MHz range during characterisation. The F20AD's dual-channel design can drive two devices under test together or supply a differential signal, and the shared ground reference keeps the two channels consistent, greatly simplifying the wiring of a probe station or test fixture and shortening the development verification cycle.
- Electrical study of OLED and liquid crystal materials — New display materials (OLED emissive layers, liquid crystal alignment films) need precise high voltage waveforms during development to assess their electrical response and lifetime behaviour. A researcher uses the F20AD to step up the signal from an arbitrary waveform generator to the potential the material needs, and the two channels can apply excitations of different frequency or phase for simultaneous comparative measurement across several dimensions of material behaviour.
Key specifications
Key specifications for F20AD, as published by Pendulum Instruments. For the full datasheet or a customized configuration, please get in touch.
| Channels | 2 channels (sharing ground and power supply) |
|---|---|
| Voltage gain | ×20 (fixed) |
| Output voltage range | ±150 V (bipolar) |
| Maximum continuous output current | 150 mA per channel (current limiting circuit included) |
| Maximum output power (per channel) | about 30 W |
| Frequency response | DC to 1 MHz (at 100 Vpp); DC to 500 kHz (at max. Vpp) |
| Slew rate | 400 V/µs (maximum 400 pF load) |
| Input voltage range | ±7.5 V (nominal), ±10 V maximum |
| Input impedance | 1 MΩ (30 pF) |
| Output impedance | <0.1 Ω |
| Power supply | 100 V, 110 V or 220 V, 50/60 Hz (a version with a 110/220 V selector switch is also available) |
| Overall dimensions (W x H x D) | 257 × 102 × 262 mm |
Frequently asked questions
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