Breaking News
Comments
Newest First | Oldest First | Threaded View
robert.rich
User Rank
Rookie
re: TI TLV320DAC3202 headset driver
robert.rich   3/2/2011 10:08:07 PM
NO RATINGS
Exactly. For typical headset applications, you only care about distortion at lower power levels: less than 2mW power to the load. SNR, on the other hand, is important across the dynamic range.

Hughston
User Rank
CEO
re: TI TLV320DAC3202 headset driver
Hughston   2/25/2011 10:42:43 PM
NO RATINGS
I guess for this application you don't need better distortion because the consumer won't be able to hear it. SNR is something they would hear and complain about if they were using the product in a quiet environment. If the SNR was low the user would notice it at lower volume settings.

robert.rich
User Rank
Rookie
re: TI TLV320DAC3202 headset driver
robert.rich   2/25/2011 3:03:33 PM
NO RATINGS
Hello, Hughston. My name is Robert Rich, and I'm in the analog communications group at TI. I've got an answer to your question. The TLV320DAC3202 was designed for portable headset applications like media players, where typical average power levels are 0.1 to 2mW for a 32 ohm headset. Headset loads range between 16 to 150 ohms, and OEMs add a series resistor between the output of the headset amplifier and the load for acoustic safety reasons. The large swing of 1VRMS at the ball of the IC guarantees adequate power to the load even when the series resistor is added.

Hughston
User Rank
CEO
re: TI TLV320DAC3202 headset driver
Hughston   2/7/2011 5:27:20 PM
NO RATINGS
So this chip will put out 1 Vrms but the THD curves are show for 10 to 15 mW and the THD is listed at 68 dB for 20 mW into 16 ohms. I think I would rather see what the THD numbers are for higher drive levels. I wonder how good the part really has to be for a consumer audio product? The SNR looks good enough but maybe not the THD.



Flash Poll
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
The Engineering Life - Around the Web
Terry Cutler, CTO, Digital Locksmiths

The USB Keys in the Urinal
Terry Cutler, CTO, Digital Locksmiths
Post a comment
Security is a major obsession today, particularly as the industry makes the shift from traditional, standalone devices to the design of connected, networked systems that are “always ...

Engineer's Bookshelf
Caleb Kraft

The Martian: A Delightful Exploration of Math, Mars & Feces
Caleb Kraft
6 comments
To say that Andy Weir's The Martian is an exploration of math, Mars, and feces is a slight simplification. I doubt that the author would have any complaints, though.

Design Contests & Competitions
Caleb Kraft

Join The Balancing Act With April's Caption Contest
Caleb Kraft
58 comments
Sometimes it can feel like you're really performing in the big tent when presenting your hardware. This month's caption contest exemplifies this wonderfully.

Engineering Investigations
Caleb Kraft

Frankenstein's Fix: The Winners Announced!
Caleb Kraft
8 comments
The Frankenstein's Fix contest for the Tektronix Scope has finally officially come to an end. We had an incredibly amusing live chat earlier today to announce the winners. However, we ...

Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)