Ver 1.2
34
22/02/24
ES269
6000 Counts Intelligent Auto-Function DMM IC
Notes:
⚫
The ESD protection circuits protect most of pins. However, V+, V-, AGND, AGND and VR1 are
not protected enough because the parasitic effect must be decrease. Therefore, enough external
protection is needed for assembling, carrying, and keeping. In addition, components connecting
to these unprotected pins must be soldered on board before the IC is soldered.
⚫
All the
zener diodes
above are used for
IC protection
. These protections are needed and these
zener diodes must be soldered on PCB first before soldering ES269 on.
⚫
In order to automatically switch the measurement to A/mA in DMM mode, the input terminal
must be designed to connect the DET_A/DET_mA pin to AGND when the test lead is inserted.