Just grabbed this on Fleabay, i was curious of its internals
199999 count Bench DMM
Dac : Burr Brown ADS1250U 20 bit ??
Next to it IC22 : An OPA2277 10µV, 0.1µV/˚C, High-Precision, Low-Power Operational Amplifier
Reference : An LT1027 thks @AVGResponding Very Low Drift: 2ppm/°C Max TC Precision reference with extra-low drift
For sure not the LM199 399 or even an LTZ1000 loll
Main Cpu : Renesas H8S/2134F Web says : Microcontroller for Office Equipment Applications
Eeprom i think : 8 pins Soic 3771 if someone find a datasheet
i could try to read it ?
0026
343
ADC clock : An EXO 3 clock module 18.432 Mhz ??
Precision Resistor : Caddock 1776-C4
Display Drivers : 2x TD62083F 8CH DARLINGTON SINK DRIVER
The front panel plastic is very thin / brittle, i dont think it would survive some impact, sure its now yellowish
Under the pcb i only see some transistors, no other ic's, i dont want to dismantle more than this
For sure they have put the cpu far away from the front panel ??