Analog Data Acquisition
You can acquire data from analog input channels either synchronously or asynchronously. For synchronous reads, data is acquired in the foreground. For asynchronous reads, data is acquired in the background. Before you use analog input channels, see Hardware Discovery and Setup.
Functions
addinput | Add input channel to device interface |
read | Read data acquired by hardware |
readwrite | Simultaneously read and write device channel data |
start | Start DataAcquisition background operation |
stop | Stop background operation |
removechannel | Remove channel from device interface |
flush | Flush DataAcquisition input and output buffers |
Apps
| Analog Input Recorder | Acquire and visualize analog input signals |
Topics
Foreground Data Acquisition
- Acquire Data in Foreground
Acquire data from a device while MATLAB® waits. - Generate and Measure Signals with Analog Devices ADALM1000
Program aDataAcquisitioninterface for ADALM1000 input and output. - Acquire Data and Generate Signals Simultaneously
Acquire and generate data at the same time. - Acquire Data from Multiple Channels
Acquire data from multiple channels, and from multiple devices on the same chassis.
Background Data Acquisition
- Acquire Data in Background with Live Plot Updates
Acquire data from a device while MATLAB continues to run.
Measurement Types
- Acquire Bridge Measurements
Acquire and plot data using an NI cDAQ device. - Acquire Sound Pressure Data
Acquire sound data from an NI 9234. - Acquire IEPE Data
Acquire IEPE data using an NI 9234.
App Workflows
- Acquire Data with Analog Input Recorder
Use the Analog Input Recorder app to visualize and record analog input signals. - Acquire Machine Data for Anomaly Detection and Predictive Maintenance Using Analog Input Recorder
Use the Analog Input Recorder app with Diagnostic Feature Designer App to extract features from acquired machine data. (Since R2026a)
Related Information
Featured Examples
Getting Started with NI Devices
Get started with National Instruments™ devices from the command line.
Getting Started with MCC Devices
Get started with MCC devices from the command line.
Getting Started Acquiring Data with Digilent Analog Discovery
Acquire voltage data at a rate of 300 kHz. The input waveform is a sine wave (10 Hz, 2 Vpp) provided by an external function generator.
Acquire Data Using NI Devices
Acquire data from a National Instruments™ device.
Acquire Data Using NI FieldDAQ Device
Acquire data from an NI™ FieldDAQ device.
Acquire Continuous and Background Data Using NI Devices
Acquire analog input data using non-blocking commands.
Acquire Data from Multiple Channels Using an MCC Device
Acquire data from multiple analog input channels with an MCC device.
Acquire Data from an Accelerometer
Acquire and display data from an accelerometer attached to a vehicle driven under uneven road conditions.
Measure Strain Using an Analog Bridge Sensor
Acquire bridge circuit voltage ratio data using a CompactDAQ module, then compute and plot strain values.
Acquire Temperature Data from a Thermocouple
Read data from NI™ devices that support thermocouple measurements.
Acquire Temperature Data from an RTD
Acquire temperature data from a Resistive temperature device (RTD) and display the readings.
Acquire and Analyze Sound Pressure Data from an IEPE Microphone
Acquire and display sound pressure data from a PCB IEPE array microphone, Model 130E20.
Acquire and Analyze Noisy Clock Signals
Acquire clock signals and analyze transitions, pulses, and compute metrics.
Log Analog Input Data to a File Using NI Devices
Save data acquired in the background to a file.
Capture Data with Software-Analog Triggering
Implement a triggered data capture based on a trigger condition defined in software.
Create an App for Analog Triggered Data Acquisition
Create an analog-triggered data acquisition app by using Data Acquisition Toolbox™ and App Designer.
Analog Triggered Data Acquisition Using Stateflow Charts
Create an analog-triggered data acquisition app by using Stateflow®, Data Acquisition Toolbox™, and App Designer.
Create an App for Live Data Acquisition
Create an app which acquires data from a DAQ device or sound card, displays a live data view, and logs data to a MAT file.
