PCM2912A_15 Datasheet, PDF (1/34 Pages) Texas Instruments – Audio Codec With USB Interface

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PCM2912A
SLES230A – SEPTEMBER 2008 – REVISED AUGUST 2015
PCM2912A Audio Codec With USB Interface, Mono Microphone Input and Stereo
Headphone Output
1 Features
•1 On-Chip USB Interface:
– With Full-Speed Transceivers
– Fully Compliant With USB 2.0 Specification
– Certified By USB-IF
– Partially Programmable Descriptors
– Adaptive Isochronous Transfer for Playback
– Asynchronous-Isochronous Transfer for
Record
– Bus Powered
• 16-Bit Delta-Sigma ADC and DAC
• Sampling Rate:
– 8, 11.025, 16, 22.05, 32, 44.1, or 48 kHz
• On-Chip Clock Generator:
– 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
– Passband Ripple: ±0.05 dB
– Stop-Band Attenuation: –65 dB
– Single-Ended Voltage Input
– 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
– Dynamic Range: 90 dB
– PO: 13 mW (R_L = 32 Ω)
– PO: 25 mW (R_L = 16 Ω)
– Oversampling Digital Filter
– Passband Ripple: ±0.1 dB
– Stop-Band Attenuation: –43 dB
– Single-Ended Voltage Output
– Analog LPF Included
– Sidetone PGA, Output PGA, and HP
Amplifier
1
• Multifunctions:
– Suspend, Playback, and Record Status Flag
– Microphone Amplifier, Mute, and Gain Control
• Pop/Click Noise-Free
• Single Power-Supply: 5 V Typical (V_BUS)
• Package: 32-Pin TQFP
2 Applications
• USB Headset
• USB Headphone
• USB Speaker
• USB Featured Consumer Audio Product
• USB Audio Interface Box
• USB Monitor
• Video Conference System
3 Description
The PCM2912A is the Texas Instruments single-chip,
USB stereo audio codec with a USB, 2.0-compliant,
full-speed protocol controller and an analog front-end
(AFE) function for headset applications.
The USB protocol controller works with no software
code, but USB descriptors can be modified on
request. The PCM2912A 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 rates with low clock jitters.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
PCM2912A
TQFP (32)
7.00 mm × 7.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Block Diagram
USB
Mic Input
PCM2912A
Headphone
Play indicator
Record indicator
Suspend flag
VDD
VCCA
VCCR
VCCL
VCCP
PGND
HGND
BGND
AGND
DGND
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.