Datasheet

Burr-BrownAudio
1
FEATURES
APPLICATIONS
DESCRIPTION
PCM2912A
www.ti.com .......................................................................................................................................................................................... SLES230 – SEPTEMBER 2008
AUDIO CODEC WITH USB INTERFACE,
MONO MICROPHONE INPUT AND STEREO HEADPHONE OUTPUT
234
• On-Chip USB Interface: – Oversampling Digital Filter
– With Full-Speed Transceivers – Passband Ripple: ± 0.1 dB
– Fully Compliant with USB 2.0 Specification – Stop-Band Attenuation: – 43 dB
– Certified By USB-IF – Single-Ended Voltage Output
– Partially Programmable Descriptors – Analog LPF Included
– Adaptive Isochronous Transfer for – Sidetone PGA, Output PGA, and HP
Playback Amplifier
– Asynchronous Isochronous Transfer for • Multifunctions:
Record
– Suspend, Playback, and Record Status Flag
– Bus Powered
– Microphone Amplifier, Mute, and Gain
• 16-Bit Delta-Sigma ADC and DAC Control
• Sampling Rate: • Pop/Click Noise-Free
– 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz • Single Power-Supply: 5 V Typ (V
BUS
)
• On-Chip Clock Generator: • Package: 32-Pin TQFP
– With Single 6-MHz Clock Source
• Mono ADC with Microphone Input
• USB Headset
– Analog Performance at V
BUS
= 5 V:
• USB Headphone
– THD+N: 0.01%
• USB Speaker
– SNR: 92 dB
• USB Featured Consumer Audio Product
– Dynamic Range: 90 dB
• USB Audio Interface Box
– Decimation Digital Filter
• USB Monitor
– Passband Ripple: ± 0.05 dB
• Video Conference System
– Stop-Band Attenuation: – 65 dB
– Single-Ended Voltage Input
– Antialiasing Filter Included
The PCM2912A is the Texas Instruments single-chip,
USB stereo audio codec with a USB 2.0-compliant
– Digital HPF Included
full-speed protocol controller and an analog front-end
– Microphone Bias, Microphone Amplifier,
(AFE) function for headset applications. The USB
and Input PGA
protocol controller works with no software code, but
• Stereo DAC With Headphone Output
USB descriptors can be modified on request
(1)
. The
PCM2912A employs SpAct™ architecture, TI ’ s
– Analog Performance at V
BUS
= 5.0 V:
unique system that recovers the audio clock from
– THD+N: 0.01% (R
L
> 10 k Ω )
USB packet data. On-chip analog PLLs with SpAct
– THD+N: 0.02% (R
L
= 32 Ω )
enables independent playback and record sampling
rates with low clock jitters.
– SNR: 92 dB
– Dynamic Range: 90 dB
– PO: 13 mW (R
L
= 32 Ω )
– PO: 25 mW (R
L
= 16 Ω )
(1) The descriptor can be modified by changing a mask; contact
your local representative for details.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2 SpAct is a trademark of Texas Instruments.
3 Audio Precision, System Two are trademarks of Audio Precision, Inc..
4 All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.