A new 6 Channel, 24 bit, Full Bridge Sensor FeatherWing #Feather #Sensors
JTinker on Tindie introduces a 6 Channel 24bit ADC board in the FeatherWing format for full bridge sensors (e.g., load cells, pressure transducers, strain gauges).
What is it?
This is a simple but versatile Feather compatible board. It uses an AD7794, a very robust 6 channel 24 bit ADC. It’s a relatively slow converter (470 Hz Max), but this board is really suited for lower power, monitoring type applications and can consume as little as 2 μA in standby. It has an on-board 2.5 V regulator for excitation voltage and is designed primarily to read load cells and pressure gauges. However, it can also be used to read any ratiometric sensor (such as potentiometers), thermocouples, or any 0 – 3.3 V signal.
Specifications
RMS noise down to 40 nV at lowest data rate (4.17 Hz)
Power-down current: 1 μA maximum (AD7794 chip)
Low noise, programmable gain, instrumentation amplifier
Band gap reference with 4 ppm/°C drift typical
Simultaneous 50 Hz/60 Hz rejection
Update rate: 4.17 Hz to 470 Hz
Six differential analog inputs
4 pin connections with excitation and ground for each channel
On board 2.5v LDO with enable pin broken out to turn off excitation for low power applications
The board is available with screw terminals, Plug in spring terminal connectors, or pin headers for the sensor connections. All terminals and headers are sold unsoldered.
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