TLV3501A-Q1: Why does the quiescent current of these two comparators(TLV3501A, TLV320x) have so huge difference?

Jankel

Intellectual 731 points

Part Number: TLV3501A-Q1
Other Parts Discussed in Thread: TLV3201, TLV3501

Why does the quiescent current of these two comparators(TLV3501A, TLV320x) have so huge difference?

TLV3501A: 3.2mA

TLV320x: 40uA

over 7 years ago

0 Chuck Sins over 7 years ago

TI__Mastermind 25920 points

Jankel

The quiescent current difference is a result of the comparators difference in speed. Speed in comparators is reflected in the propagation delay specification. For the tlv3501 the prop delay is 10x faster (4.5ns) than the tlv3201 (40ns). You can think of this like bandwidth for amplifiers. The higher the bandwidth, the higher the quiescent current.

Chuck

0 Jankel over 7 years ago in reply to Chuck Sins

Intellectual 731 points

Hi Chuck,

Thank you so much. I got it.
There two ICs both use the CMOS technology, right?

Why doesn't TI give the opamp/comparator schematic inside the ICs like before?

If so, we can know more things through the datasheet.

0 Chuck Sins over 7 years ago in reply to Jankel

TI__Mastermind 25920 points

That is correct.

Amplifiers

Amplifiers forum

TLV3501A-Q1: Why does the quiescent current of these two comparators(TLV3501A, TLV320x) have so huge difference?