PCM2912PJT Datasheet, PDF (1/32 Pages) Texas Instruments – AUDIO CODEC WITH USB INTERFACE, MONO MICROPHONE INPUT AND STEREO HEADPHONE OUTPUT

BurrĆBrown Products
from Texas Instruments
PCM2912
SLES216 – FEBRUARY 2008
AUDIO CODEC WITH USB INTERFACE,
MONO MICROPHONE INPUT AND STEREO HEADPHONE OUTPUT
FEATURES
1
•23 On-Chip USB Interface:
– Oversampling Digital Filter
– With Full-Speed Transceivers
– Pass-Band 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
Playback
– Sidetone PGA, Output PGA, and HP
Amplifier
– Asynchronous Isochronous Transfer for
Record
– Bus Powered
• 16-Bit Delta-Sigma ADC and DAC
• Multifunctions:
– Suspend, Playback, and Record Status Flag
– Microphone Amplifier, Mute, and Gain
Control
• Sampling Rate:
• Pop/Click Noise Free
– 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz
• On-Chip Clock Generator:
• Single Power Supply: 5 V Typ (V_BUS)
• Package: 32-Pin TQFP
– With Single 6-MHz Clock Source
• Mono ADC with Microphone Input
– Analog Performance at V_BUS = 5 V:
– THD+N: 0.01%
– SNR: 92 dB
– Dynamic Range: 90 dB
– Decimation Digital Filter
– Pass-Band Ripple: ±0.05 dB
– Stop-Band Attenuation: –65 dB
– Single-Ended Voltage Input
APPLICATIONS
• USB Headset
• USB Headphone
• USB Speaker
• USB Featured Consumer Audio Product
• USB Audio Interface Box
• USB Monitor
• Video Conference System
DESCRIPTION
– Antialiasing Filter Included
– Digital HPF Included
– Microphone Bias, Microphone Amplifier,
and Input PGA
• Stereo DAC With Headphone Output
– Analog Performance at V_BUS = 5.0 V:
– THD+N: 0.01% (R_L > 10 kΩ)
– THD+N: 0.02% (R_L = 32 Ω)
– SNR: 92 dB
The PCM2912 is the Texas Instruments single-chip,
USB stereo audio CODEC with USB 2.0-compliant
full-speed protocol controller and analog front end
(AFE) function for headset application. The USB
protocol controller works with no software code, but
USB descriptors can be modified on request⁽¹⁾. The
PCM2912 employs SpAct™ architecture, TI’s unique
system that recovers the audio clock from USB
packet data. On chip analog PLLs with SpAct enables
independent playback and record sampling rate with
low clock jitters.
– 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 representative about the 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.
SpAct is a trademark of Texas Instruments.
2
Audio Precision, System Two are trademarks of Audio Precision, Inc..
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008, Texas Instruments Incorporated