HMP9701A

• Compliant with the Audio Codec '97 Standard
• High Fidelity 16-Bit Converters
    - DAC SNR 87dB
    - ADC SNR 85dB
`Additional A/D for Microphone Pass-Through
`Ac Link Serial lnterface Compatible with AC'97 Digital Controllers
`Fixed 48kHz Sampling Rate
`6 Channel lnput Mixer
`Programmable Powerdown Modes
`48 Lead TQFP Package
`Single +5V Supply

The HMP9701A is the next generation PC based audio codec solution. It is compliant to the new AC'97 standard and, as such, interfaces to any AC'97 compliant digital controller. It offers the designer a solution to satisfy the demand for flexibility and improved High Fidelity sound in a PC environment. As part of the AC'97 PC audio standard architecture, the HMP9701A helps pave the way for PC'97 compliant desktop, portable and entertainment PCs with a cost effective high-quality audio solution.

As the analog front end of the AC'97 chipset, the HMP9701A accepts line level audio inputs from seven different sources and converts the analog audio to 16-bit digital streams of either stereo or mono data. The 48 kss data is transmitted to the controller via the AC'97 standard five wire interface. The controller sends digital audio data to the HMP9701A to be converted to analog stereo or monaural line output using two DACs.

In the HMP9701A, we include an additional ADC to be used for Acoustic Echo Canceling needed for video conferencing applications. This ADC has a dedicated microphone input. It has the same high quality performance as the stereo ADCs. The small 48 lead TQFP (Thin 1.5mm and 7mm x 7mm footprint Quad Flat Package) makes it easy to locate the analog codec close to the analog sources. Thus, reducing noise and lowering the cost of implementation.