Circuit Note

CN-0216

Rev. 0 | Page 5 of 5

method were approximately the same as the value obtained by

multiplying the rms value by 6.6.

The values obtained from the sample set are in LSBs, so they

must be converted into voltage, where 1 LSB = 0.596 µV for a

5 V reference.

If desired, the results of several sample sets can be averaged to

get a more accurate measurement.

Noise-free code resolution is calculated from the peak-to-peak

noise as described previously in this circuit note.

LEARN MORE

Kester, Walt. 1999. Sensor Signal Conditioning. Section 2.

Analog Devices.

Kester, Walt. 1999. Sensor Signal Conditioning. Section 3.

Analog Devices.

Kester, Walt. 1999. Sensor Signal Conditioning. Section 4.

Analog Devices.

MT-004 Tutorial, The Good, the Bad, and the Ugly Aspects of

ADC Input Noise—Is No Noise Good Noise? Analog Devices.

MT-022 Tutorial, ADC Architectures III: Sigma-Delta ADC

Basics, Analog Devices.

MT-023 Tutorial, ADC Architectures IV: Sigma-Delta ADC

Advanced Concepts and Applications, Analog Devices.

MT-031 Tutorial, Grounding Data Converters and Solving the

Mystery of "AGND" and "DGND", Analog Devices.

MT-063 Tutorial, Basic Three Op Amp In-Amp Configuration,

Analog Devices.

MT-101 Tutorial, Decoupling Techniques, Analog Devices.

Wong, Vicky, AN-1114 Application Note, Lowest Noise Zero-

Drift Amplifier Has 5.6 nV/√Hz Voltage Noise Density,

Analog Devices.

CN-0102 Circuit Note, Precision Weigh Scale Design Using the

AD7190 24-Bit Sigma-Delta ADC with Internal PGA,

Analog Devices.

CN-0107 Circuit Note, Weigh Scale Design Using the AD7780

24-Bit Sigma-Delta ADC with Internal PGA, Analog

Devices.

CN-0108 Circuit Note, Weigh Scale Design Using the AD7781

20-Bit Sigma-Delta ADC with Internal PGA, Analog

Devices.

CN-0118 Circuit Note, Precision Weigh Scale Design Using the

AD7191 24-Bit Sigma-Delta ADC with Internal PGA,

Analog Devices.

CN-0119 Circuit Note, Precision Weigh Scale Design Using the

AD7192 24-Bit Sigma-Delta ADC with Internal PGA,

Analog Devices.

CN-0155 Circuit Note, Precision Weigh Scale Design Using a 24-

Bit Sigma-Delta ADC with Internal PGA and AC Excitation,

Analog Devices.

Data Sheets and Evaluation Boards

AD7791 Data Sheet

ADA4528-1 Data Sheet

ADP3301 Data Sheet

CN-0216 Circuit Evaluation Board (EVAL-CN0216-SDPZ)

System Demonstration Platform (EVAL-SDP-CB1Z)

REVISION HISTORY

9/11—Revision 0: Initial Version

(Continued fromfirst page)Circuits from the Lab circuits are intended only for use with Analog Devices products and are the intellectual property of Analog Devices or its licensors. While you

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