Lpc2000

Indeed, low power codecs aren't hard to find.  Here's an example...

Go to www.ti.com (Texas Instruments), and type "low power codec" into 
the keyword search.

The first result is PCM3501... which is a voice quality codec (16 bits 
but lower sample rates), uses 9 mA at 3.3 volts.  In stock at Digikey.

The second result is PCM3500... very similar to PCM3501.

The third result is TLV320AIC26... which is a CD quality DAC (24 bits, 
48 kHz, 97 dB S/N) and voice quality A/D, plus an amplifier and other 
goodies.  Looks like the DAC needs about 4.6 mA, plus maybe another 2.3 
mA if you use the PLL.  Lots of options with this chip, read the 
datasheet.  That part number is an eval board, but the actual chip is in 
stock at Digikey too.

Lots more similar chips, but some others appear on that first page of 25.

If you only need a DAC, well, try some more searching and you'll find 
'em.  Cirrus Logic, Analog Devices, National Semiconductor, Maxim and 
Linear Tech might be other companies to try besides Texas Instruments.


Paul