For research experiments and reading sensors, sometimes a high-precision differential ADC and amplifier is needed. A differential ADC measures the difference between two voltages rather than the voltage above a common ground – measuring differentially helps eliminate two of the most common sources of voltage measurement error: common-mode noise and voltage drop due to current-carrying conductors. The neoPLC ADC-P board provides two differential ADCs (four single-ended ADCs) that can read at up to 860 samples per second. A built-in Programmable Gain Amplifier (PGA) allows the ADC-P to read voltages from small signal sensors (+/- 256 mV) or analog-output ICs and potentiometers (as high as +/-6.1V) with 16-bit precision. This board is a great solution for instrumentation of many analog-output sensors like pressure transducers and more.

SPECS:

• 2-channel differential (4-channel single ended), 16-bit ADC, 860 Hz sample rate.
• Achieve +/-6.1V range in differential mode (up to supply voltage +0.3V).
• RMS noise ranges from 7 uV using amplifier in +/-0.256V range, up to 188 uV in full-scale range (+/-6.1V).
• Note: this sensor is precise enough that additional noise from the transducer itself is often measurable. Address pads allow up to 2 ADC-P boards at once.