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LPA400 Laboratory Power Amplifier

LPA400 is a wideband high volatge amplifier for an industrial or laboratory environment.

The LPA range of power amplifiers from Newtons4th Ltd are robust and reliable for use in a variety of industrial and laboratory applications. Designed originally for use with the PSM range frequency respsonse analyzers, they can also be used anywhere where there is a need to boost a signal either in voltage or current.

They combine DC accuracy with wide bandwidth to faithfully reproduce complex waveforms, driving loads that may be capacitive, inductive or resistive.

Optionally, the DC component can be eliminated with AC coupling, or can be reduced with AC+(DC) coupling. To limit high frequency noise, the input bandwidth can be reduced with a linear phase, 2nd order, low pass filter for low frequency applications.

Features & Benefits

400Vpk @ 50mApk from DC to 1MHz AC, AC+DC or AC with reduced DC
Switch selectable gain stable into a wide variety of loads
High slew rate Selectable bandwidth

Brochures Documentation
LPA Brochure April 2019 LPA400.User Guide


LPA400 Options, Software and Accessories

COMMS_ICON Electrical Connection Input/Output Interfaces:
  • Input: Safety BNC
  • Output: Safety BNC, 4mm Safety
PROBE_ICON Probes and Probe Accessory Options:
  • TA107 Transimpedance Amplifier (For High Impedance measurement)
  • HVx100 2500V Attenuating Probe
CLAMP_ICON Current Measurement Options:
  • HF010m 10mΩ/20Arms 1MHz Bandwidth Current Shunt
  • HF100m 100mΩ/6Arms 1MHz Bandwidth Current Shunt
  • HF470m 470mΩ/3Arms 1MHz Bandwidth Current Shunt
  • HF01A 1Ω/1Arms 1MHz Bandwidth Current Shunt
CASES_ICON Carry Cases:
  • Soft Carry Case – Black Nylon Padded Case with accessory space, handle and strap
PC_ICON PC Software (Free of charge):
  • PSMComm – PSM PC Interface Software, databasing, graphs, real time data display
  • PSMSoft – Labview Executable with PSM, including Nyquist Simulation

Application Notes and Related Articles

For application notes please see the app note section of our Knowledge Database

Input ConnectorIsolated BNCIsolated BNC
Input Impedance10KΩ10KΩ
Peak Input Voltage±8V±3.6V
Input Common Mode Range±40V±40V
Input Offset Voltage5mV (max)
1.5mV (typ)
5mV (max)
1.5mV (typ)
Input Couplingac, ac+dc, ac+ (dc)ac, ac+dc, ac+ (dc)
AC Coupling Filter -3dB16Hz16Hz
(dc) Gain Factor0.1V0.1V
Full Power Bandwidth100kHz @ 800V pk-pk
1MHz @ 80V pk-pk
200kHz @ 360V pk-pk
1MHz @ 80V pk-pk
Low Bandwidth -3dB80kHz80kHz
Low Bandwidth Filter Attenuation40dB / decade40dB / decade
Low Bandwidth Filter Typelinear phaselinear phase
Gain Optionsx50, x200, x500x50, x200, x500
Low Frequency Gain Accuracy0.1%0.1%
Output ConnectorIsolated BNCIsolated BNC
Continuous Output Current0.05Arms0.1Arms
Peak Output Current0.075Apk0.15Apk
Peak Output Voltage±400V±180V
Slew Rate500V / μs500V / μs
Operating Temperature Range0 - 40 ⁰C0 - 40 ⁰C
Size8.5 x 15 x 25cm8.5 x 15 x 25cm
Weight2.5Kg (approx)2.5Kg (approx)
Power Source230V ±10%, 50Hz (UK)
115V ±10%, 60Hz (USA)
230V ±10%, 50Hz (UK)
115V ±10%, 60Hz (USA)
Power Consumption45VA (max)45VA (max)