Pendulum Instruments · High-Speed Linear Amplifiers
F70PV
Unipolar variable-gain high-speed amplifier, DC to 5 MHz, up to +70 V output
The F70PV is the unipolar, higher-voltage sibling of the F30PV: 0 to +70 V output, about 1 A continuous, the same continuously adjustable 0 to 10x gain, DC to 5 MHz bandwidth and 500 V/µs slew rate. Going unipolar doubles the positive swing on the same power architecture; the trade is that it cannot drive in reverse. It suits fast, one-directional loads such as unipolar ultrasonic transducer drive, fast electrostatic and piezo excitation, and fast heating pulses. As with the P150, the one question that decides the choice is whether your application ever needs a negative voltage.
Overview
Giving up the negative half of the swing buys roughly twice the positive voltage within the same power budget; that is the most direct benefit of a unipolar design. The F70PV shares its high-speed architecture with the bipolar F30PV (5 MHz bandwidth, 500 V/µs slew rate) but its output spans 0 to +70 V rather than ±35 V, and the output current limit is set to about 1 A. For loads that are one-directional by nature this is pure gain: fast electrostatic and piezo excitation works in the positive region only, unipolar ultrasonic drive needs no negative half, and a fast heating pulse needs it even less. The 0 to 10x variable gain is retained, so during experiments you adjust amplitude at the amplifier instead of going back to the signal source. Follow the manufacturer on load type: the manual specifies the F70PV for resistive and capacitive loads, allows an inductance in series with resistance, and excludes a purely inductive load. A unipolar amplifier also has no negative half to absorb back EMF, so if your load has an inductive component, tell us when you request a quotation and we will advise on the freewheeling path and the configuration.
Key specifications
| Frequency range | DC to 5 MHz |
|---|---|
| Output voltage (maximum) | +70 V (unipolar) |
| Variable gain | 0 to 10x (continuously adjustable) |
| Continuous output current | ca 1 A (current-limited) |
| Slew rate | 500 V/µs |
| Input voltage range | 0 to +7 V |
| Input impedance | 500 Ω ∥ 30 pF (standard; 50 Ω or 1 kΩ on request) |
| Output impedance | 2 Ω (linear mode) |
| Maximum capacitive load | 1 nF |
| Input overvoltage protection | 15 mA microfuse + 2 Ω series output resistor |
| Mains supply | 100/110 V or 220/230 V, 50/60 Hz |
| Dimensions (W × H × D) | 257 × 102 × 262 mm, 4 kg |
Features
Unipolar buys twice the voltage
0 to +70 V on the same power architecture, double the positive swing of the bipolar ±35 V.
The high-speed architecture stays
DC to 5 MHz and 500 V/µs, the same class as the F30PV, with about 1 A of continuous output current.
Gain adjustable 0 to 10x
Set the amplitude at the amplifier during experiments instead of changing the signal source.
Load types follow the manufacturer
The manual specifies resistive and capacitive loads; a purely inductive load is excluded, and an inductance in series with resistance needs its freewheeling path assessed.
For loads that are one-directional by nature
Unipolar ultrasonic transducer drive, fast electrostatic and piezo excitation, fast heating pulses.
Capacitive loads up to 1 nF
Piezo actuators, MEMS, liquid crystal and OLED cells; a common choice in materials testing and semiconductor evaluation.
Typical applications
Piezo actuation
Piezo actuator drive and precision positioning control
In R&D validation of nanopositioning stages, ultrasonic transducers and piezo motors, engineers feed the low-voltage output of an arbitrary waveform generator into the F70PV and use the 0 to 10x gain to raise it to a unipolar output of up to +70 V. The 5 MHz bandwidth keeps fast switching waveforms undistorted while the piezo stroke is controlled precisely.
MEMS testing
Electrostatic actuation characterization of MEMS devices
During MEMS process development and outgoing characterization, the F70PV provides linear amplification from DC to 5 MHz with a 500 V/µs slew rate. Unipolar high-voltage steps or swept excitation can be applied to the device to measure pull-in threshold, resonance frequency and electrostatic behavior without switching to a bipolar supply.
Display technology
Electro-optical characterization of liquid crystal and OLED devices
Electro-optical response measurements on LCD panels and OLED devices need a repeatable, low-distortion unipolar high-voltage drive. The F70PV gain is adjusted continuously from the front panel, so a lab engineer can change the applied voltage range quickly and record gray-scale curves or luminous efficiency with an optical sensor, shortening material screening and parameter optimization for display devices.
Options and configuration
Tick the options you need; the configuration list is compiled and carried into the quotation form.
Standard equipment (included)
Hardware options (built to order)
Downloads
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