Hello, unfortunately I cannot find any inner circuitry of the chip around internet.
Is the inside technology (expecially the high speed current switches in the R-2R network) CMOS or bipolar?
I suspect it is 100% bipolar, but the higher voltage supply (till 12V) misleads me.
Is the inside technology (expecially the high speed current switches in the R-2R network) CMOS or bipolar?
I suspect it is 100% bipolar, but the higher voltage supply (till 12V) misleads me.
Almost certainly bipolar: the terms VBE and hFE are used on page 5 of its datasheet, so there must be bipolar transistors in the device. That makes sense, because of the much better matching of bipolars.
On page 2 the input current for a low digital input is specified as 50 uA maximum, while it is only 1 uA for a high level. This is typical for TTL-like bipolar inputs. If it were made in a BiCMOS rather than a bipolar process, the digital part would be made with MOSFETs and have low input currents for both high and low levels.
On page 2 the input current for a low digital input is specified as 50 uA maximum, while it is only 1 uA for a high level. This is typical for TTL-like bipolar inputs. If it were made in a BiCMOS rather than a bipolar process, the digital part would be made with MOSFETs and have low input currents for both high and low levels.
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