Fully open source nV level measuring instrument (super awesome, including PCB, schematic diagram, firmware, etc.)

This awesome project comes from the nV-level measurement instrument challenge launched by xDevs. The project requirements are relatively difficult and only one author has completed it. The author has open sourced all project materials and provided detailed explanations (in English).

Schematic PCB

CN0276

High Performance, 10-Bit to 16-Bit Resolver-to-Digital Converter

Schematic PCB

CN0287

Isolated 4-Channel Thermocouple/RTD Temperature Measurement System with 0.5°C Accuracy

Schematic PCB

Design 8-channel asynchronous ADC acquisition into synchronous acquisition through phase compensation

A phase compensation algorithm is used to compensate for the additional phase delay introduced by the multiplexed ADC, thereby producing an effect equivalent to a synchronously sampled ADC.

Schematic PCB

CN0234

Single-supply, micropower toxic gas detector using electrochemical sensors

Schematic PCB

CN0255

16-bit, 100 kSPS single-supply low-power data acquisition system

Schematic PCB

CN0326

Isolated, low-power pH monitor with temperature compensation

Schematic PCB

CN0247

12-bit, 1 MSPS SAR ADC and driver, total power consumption is less than 5 mW

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CN0277

18-bit, 5 MSPS data acquisition system optimized for AC performance

Schematic PCB

TI high-speed oscilloscope reference design (sampling rate 12.8Gsps, bandwidth 6GHz, 12bit resolution)

The complete PCB related files are open source, and there is also a design document for reference and study.

Schematic PCB

CN0254

16-bit, 250 kSPS, 8-channel single-supply isolated data acquisition system

Schematic PCB

CN0183

Precision, 16-bit bipolar output voltage source using +12V to ±5V supplies

Schematic PCB

CN0229

4-channel, flexible, configurable, voltage and current output circuit for I/O card and PLC applications

Schematic PCB

12-Bit, 2GSPS Data Acquisition Reference Design

By interleaving Renesas' low power, high sample rate ADCs, it is possible to achieve a combination of ultra-high sample rate and very high dynamic range that is not available in today’s stand-alone ADCs. This reference design demonstrates the performance attainable by combining Renesas' ADC technology and SP Devices' interleaving algorithms. In this design, four ISLA112P50 12-bit, 500MSPS analog-to-digital converters are interleaved to sample at a rate of 2.0GSPS. At this sampling rate, the reference design provides over 6dB more SNR and 13dB better SFDR than the best alternative stand-alone ADC.

CN0104

ATE application parameter measurement unit and supporting devices using PMU AD5522 and 16-bit ADC AD7685

Schematic PCB

CN0133

Detecting low-g acceleration using the ADuC7024 precision analog microcontroller and the ADXL345 digital accelerometer

Schematic PCB

ADC120 8-Channel, 50ksps to 1Msps, 12-Bit Analog-to-Digital Converter Evaluation Board

Evaluation board for the ADC120 8-channel, 50ksps to 1Msps, 12-bit analog to digital converter

Schematic PCB

CN0102

Implement precision electronic scale design using the 24-bit Σ-Δ ADC AD7190 with built-in PGA

Schematic PCB

6A power solution reference design with 0.05% current accuracy for battery test systems

This reference design circuit introduces a high-precision bidirectional current power supply solution used in battery test systems (BTS). The maximum current capacity is 6A, and the full-scale accuracy is less than 0.05%. Controlled by logic pins, this circuit can be used to charge or discharge the battery. During the charging process, the battery voltage can also be controlled through analog signals. Design of this circuit is simple and easy due to the fully integrated buck and boost converters. The performance of the solution can be verified via a built-in evaluation board.

Schematic PCB

CN0200

18-Bit, Linear, Low-Noise, Precision Bipolar ±10 V DC Voltage Source

Schematic PCB