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Single Channel Instrument Amplifier for
Load Cells and Pressure Transducers
A simple yet sophisticated amplifier for millivolt load cells and pressure
Perfect for 2 and 3 mV/V load cells and transducers
Precision design and quality construction.
Versatile and completely adjustable, customize your gain, balance, and offset to your specific needs.
High Quality Euro style screw terminals for input, output, and power.
Excellent front end for popular data acquisition (DAQ) modules such as Dataq and many others.
Bipolar output for full +/- 10 volt swing to input of DAQ module resulting in maximum DAQ resolution.
Eliminates need to modify DAQ for single ended or half resolution operation.
+/- 9 volt to +/- 12 volt DC power.
Low power consumption, suitable for short term battery operation, 20 to 30 mA typical.
Configurable for full bridge or half bridge operation, half bridge operation includes a zero balance
Half bridge configuration is handy for basic “home brew” two element load cells and for connection to
low cost, three wire bathroom scale cantilever mounted strain gauges.
Stable when driving high capacitance long coaxial or shielded output cable.
Internal precision 5 volt reference source for driving half or full bridge load cells and pressure
Configurable for popular 100 millivolt, 4 wire pressure transducers.
500 Hz bandwidth typical for load cells and pressure transducers.
Output noise of 1.3 mV rms typical for load cell configuration.
Output short circuit protected.
LCA-1 is not reverse power polarity protected so don't apply reverse polarity power and expect your
amplifier to behave well ever again.
LCA-1 is a very sensitive device, strong RF fields (like from a close proximity 2 meter handy talkie) will
cause undesired misbehavior.
LCA-1 is designed using electrostatic sensitive components. Exposure to ESD may damage or
degrade functionality so please follow proper and customary ESD practice when handling the bare
LCA-1 has limited input protection, inputs must never exceed voltages higher than 20 volts above
positive supply or lower than 20 volts below negative supply.
LCA-1 will not tolerate corrosive deposits, so it must be protected from all corrosive environments, in
particular, the exhaust plume from rocket motors under test.
It is recommended to apply input voltages concurrently or after power up, it is not suggested to apply
voltage to inputs before power up. Using the internal 5 volt reference is preferable to ensure that input
voltage is not present prior to power up.
Pricing and Online ordering