EEVblog #723 – Keysight 34470A 7.5 Digit Multimeter Teardown


What’s inside Keysight’s new 34470A 7 1/2 digit Truevolt bench multimeter?
What are the PCB changes from the 34461A?
What voltage reference does it use to get 16ppm nominal accuracy?

34470A Datasheet
34470A Operating & Service Manual
LTZ1000 Voltage Reference
AD8638 Chopper Amplifier
Forum HERE

High resolution teardown photos:

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