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LPA05 Laboratory Power Amplifier

High frequency, high current testing of very low impedance loads

LPA05A & LPA05B laboratory power amplifiers provide wide bandwidth signal amplification at up to 8A peak, extending the range of industrial and laboratory applications into which the LPA series can be used.

Designed originally for use with the PSM range frequency respsonse analyzers, the LPA05 laboratory power amplifier can also be used anywhere where there is a need to boost a signal either in voltage or current up to 1MHz.

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. A common application for the laboratory power amplifiers is in situations where is a requirement for impedance measurement of a device under high voltage bias or high current bias conditions, in these applications the combination of a PSM1700, PSM1735 or PSM3750 + LPA Laboratory Power Amplifier + HF Current Shunt form a high power impedance measurement system.

Product Images

LPA05A 14Vrms @ 1MHzLPA05B 11Vrms @ 1MHz
LPA05A Full power bandwidth 250kHzLPA05B Full power bandwidth 200kHz
Fixed x10 gainCan use as a standalone amplifier (requires external signal generator)
High slew rateStable into a wide range of loads
Perfect for driving magnetic coilsIsolated BNC or 4mm touchproof output sockets
Ideal for Impedance analysis at high current biasCombine with a PSM + HF Shunt for Impedance analysis

Brochures Documentation
LPA05-Brochure and Specification PDF, 650kb See Support Pages for manual


LPA05 Options, Software and Accessories

COMMS_ICON Electrical Connection Input/Output Interfaces:
  • Input: BNC
  • Output: 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:
  • HFR010 10mΩ/20Arms 1MHz Bandwidth Current Shunt
  • HFR100 100mΩ/6Arms 1MHz Bandwidth Current Shunt
  • HFR470 470mΩ/3Arms 1MHz Bandwidth Current Shunt
  • HF01R 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

Application Notes and Related Articles

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

Full Power Bandwidth 250kHz 200kHz
Output Voltage 40V pk-pk (14Vrms) @ 1MHz

80V pk-pk (28Vrms) @ 250kHz

32V pk-pk (11Vrms) @ 1MHz

Max AC Output Current 3A rms
5A pk
5A rms
8A pk
Max dc Output Current 2A 4A
Input Connector
Isolated BNC
Input Impedance
Peak Input Voltage
Input Common Mode Range
Input Offset Voltage
5mV (max)
1mV (typ)
Input Coupling
ac, ac+dc, ac+ (dc)
AC Coupling Filter -3dB
(dc) Gain Factor
Low Bandwidth Filter
40dB / decade
Low Bandwidth Filter Type
Linear Phase
Slew Rate
120V /μs
Output Connector
Isolated BNC + 4mm safety connectors
Output Power
Operating Temperature Range
0 – 40 ⁰C
30 X 15 X 25 cm
8Kg (approx)
Power Source (UK)
90 – 265V 45 – 63Hz
Power Consumption