Analog Devices AD7192 Electronic Scale Circuit Application Note

About this manual

The document details a reference circuit for an electronic scale system centered around the AD7192, a 24-bit sigma-delta analog-to-digital converter (ADC) with an integrated programmable gain amplifier (PGA). The design utilizes two ADP3303 low-dropout linear regulators to provide clean 5V and 3.3V power supplies for the load cell sensor and microcontroller interface, respectively.

What's inside

• Circuit Description
• Power Supply Requirements
• System Performance
• Common Variations
• Other Suitable ADCs

Frequently asked questions

What is the maximum tare offset magnitude relative to the load cell's full-scale output?

The tare offset can be as high as 50% of the load cell's full-scale output signal.

What is the RMS noise of the AD7192 when the output data rate is 4.7 Hz?

The RMS noise is 11 nV at an output data rate of 4.7 Hz.

What is the system accuracy in grams based on 500 samples?

The system accuracy reaches 0.02 g relative to 500 codes.