difference between digitizer,DAQ and digital Oscilloscope

This page compares digitizer,DAQ and digital oscilloscope and provide difference between digitizer,DAQ and digital Oscilloscope.

Before we proceed for comparison between digitizer and DAQ systems refer digitizer basics.

Specification	Digitizer	DAQ device
Sampling type	Simultaneous sampling	mostly multiplex sampling is used, simultaneous sampling is rarely used
Sampling rate	higher, typically 20MSPS and above	Lower, typically 10MSPS or less
Timing circuit	More accurate	Less accurate
Onboard memory	Larger	Smaller
No.of channels	Less	More
Additional functionalities	Few digital I/Os	Digital I/O channels, analog I/O channels, counters/timers
Rearm time (Referred as timing between two triggers)	Faster	Slower
Vertical range (referred as input voltage range which can be measured)	Wider, upto 50V	Smaller, about 10V

Following are the difference between Digitizer and digital Oscilloscope.

Specification	Digitizer	Oscilloscope
Onboard processing capability	Limited	Better
Waveform analysis	Data acquired can be offline analyzed w.r.t. various parameters	Rich set of functions like multiple triggering options, waveform analysis, advanced signal acquisition
Measurement throughput	High	Low
Flexibility	Less	More
User interface(UI)	Poor UI	Better UI
Cost of Ownership	Lower	Higher
Integration	Better with systems providing external processing compare to oscilloscope	-
Application	Large data processing, refer basics of data loggers	Troubleshooting