I'm not a newbie..
I see in latest datasheet for tiny45 (rev. Q, 08/2013), section 22.2, Figure 22.10 that idle current at Vcc=3.5V, 128kHz should be around 68uA.
I measured 60uA. Close, ok. I used:
Peripherals off: timer1, usi, adc. On: timer0.
Note that analog comparator (AC) is on by default, you have to manually disable it. Enabled (=not disabled), it needs internal voltage reference, so it consumes power.
When I turned it off (so shutting down int. ref. volt.), I measured 17uA.
So.. it's not precisely a mistake in the datasheet, but clearly a confusion. Why they give plots with the AC (internal ref) on, and not specify this? And why they enable the AC in the first place? - while all the other peripherals are disabled by default. Here also.. AC is not listed in the section 22.3.. Or are those their measurements really more a mistake?
Addition, 22 sept 2014: How can I contact Atmel on this issue? (firstname.lastname@example.org auto-replied that I should register on MyAtmel.. but there are only links to resources there, seems no way to contact them..)
UPDATE Oct 30 2014:
Confirmed by Atmel to be confusing.
Full appropriate reply - on the copy of my above description:
I am able to reproduce the issue.
The current consumption is nearly about 60uA when Analog comparator is enabled and the current consumption decreases to 16uA when the Analog comparator is disabled.
I have reported this issue to our internal team and it will be clarified in the future release of the datasheet.
Hence, now I am marking this support case as closed.
Thanks & Regards