Features: 1. A0-A7 ADC 8 input channels, can be easily configured as a differential input and single-ended input. 2. Low noise low temperature drift Vishay wafer metal film resistors. 3. Enter the filter capacitor (104), one for each channel 4. High-speed low-noise LDO, high power supply rejection ratio, low quiescent current. 5. Digital signal high frequency attenuation resistance, isolated external high frequency noise. 6. ADR03 2.5V voltage reference, through the OPA350 high-speed buffer composed of 0.1Hz ~ 10Hz low-pass filter circuit, high-capacity tantalum capacitors and ceramic capacitors in parallel and the use of low-noise metal film wafer resistance, effectively suppress the low-frequency noise. 7. 100uF large-capacity filter tantalum capacitors, and inductance composition LC filter circuit, the power supply more pure. 8. The analog signal ground and the digital signal are separated from each other. 9. Added GND, 2.5V, 3.3V test points, make debugging circuit more convenient.
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