What's inside Keysight's new 34470A 7 1/2 digit Truevolt bench multimeter?<br />What are the PCB changes from the 34461A?<br />What voltage reference does it use to get 16ppm nominal accuracy?<br /><br />High res photos: http://www.eevblog.com/2015/03/13/eevblog-723-keysight-34470a-7-5-digit-multimeter-teardown/<br /><br />Forum: http://www.eevblog.com/forum/blog/eevblog-723-keysight-34470a-7-5-digit-multimeter-teardown/<br /><br />34470A Datasheet:<br />http://literature.cdn.keysight.com/litweb/pdf/5991-1983EN.pdf<br /><br />34470A Operating & Service Manual: http://literature.cdn.keysight.com/litweb/pdf/34460-90901.pdf<br /><br />LTZ1000 Voltage Reference: http://cds.linear.com/docs/en/datasheet/1000afd.pdf<br /><br />AD8638 Chopper Amplifier: http://www.analog.com/media/en/technical-documentation/data-sheets/AD8638_8639.pdf<br /><br />EEVblog Main Web Site: http://www.eevblog.com<br />The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2<br /><br />Support the EEVblog through Patreon!<br />http://www.patreon.com/eevblog<br /><br />EEVblog Amazon Store (Dave gets a cut):<br />http://astore.amazon.com/eevblogstore-20<br />Donations:<br />http://www.eevblog.com/donations/<br />Projects:<br />http://www.eevblog.com/projects/<br />Electronics Info Wiki:<br />http://www.eevblog.com/wiki/
