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

 16 or 20Vpk @ 5 or 3Apk from DC to 1MHz  High frequency and current into low impedance
 Fixed x10 gain  Stable into any load
 High slew rate  Isolated BNC or 4mm touchproof output sockets
 Ideal for Impedance analysis at high current bias Combine with a PSM + HF Shunt for Impedance analysis


LPA05-Brochure and Specification-June-2020


LPA05 user guide v15

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:
  • 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

Below are a list of application notes related to the field of impedance analysis analysis

APP020 – PSRR (Power Supply Rejection Ratio Testing) with the PSM

APP020 – Amplifier Frequency Response Analysis with the PSM

APP016 – Testing RFI line filters with the PSM

APP009 – Measuring low THD with the PSM17xx

APP008–  N4L’s guide to LCR measurement with the IAI

APP006 – High Voltage Capacitance Measurement with the PSM series analyzers

APP005 – Measuring Fluctuating Signals with the PSM

APP004 – Testing FSK communications with the PSM

APP003 – Using the PSM with LVDT’s

APP002 – Testing Loop Stability with the PSM

APP001 – Testing communications transformers with the PSM

LPA05 Full Instrument Specification

Output Voltage40V pk-pk (14Vrms) @ 1MHz

80V pk-pk (28Vrms) @ 250kHz
36V pk-pk (11Vrms) @ 1MHz

Max AC Output Current3A rms
5A pk
5A rms
8A pk
Max dc Output Current2A4A
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