Datasheet

PCM9211

SBAS495 –JUNE 2010

www.ti.com

The PCM9211 has two RECOUT signals that can be routed to the MPO port. The respective sources can be

drawn from one of the 12 S/PDIF inputs, or the DIT module.

Channel status, user data, and valid audio data from the S/PDIF stream can be found in various registers or

routed to MPIO pins. In addition, the block start signal can be routed to an I/O pin, so that any postprocessing

DSP can be informed of the start of a frame for decoding data and so forth.

The DIR module in the PCM9211 complies with these digital audio I/F standards:

• S/PDIF

• IEC60958 (formerly IEC958)

• JEITA CPR-1205 (formerly EIAJ CP-1201/340)

• AES3

• EBU Tech 3250 (also known as AES/EBU)

In addition, the DIR Module within the PCM9211 also meets and exceeds jitter tolerance specifications defined

by IEC60958-3 for sampling frequencies between 28 kHz and 216 kHz.

Digital Audio Interface Transmitter (DIT)

The DIT (S/PDIF transmitter) is a relatively simple module. The DIT integrated in the PCM9211 is able to

transmit control status and user bits in the data stream, as well as standard 24-bit audio. Channel status, user

data, and Audio Valid bits in the stream are configured on incoming MPIO pins.

The DIT complies with the following audio standards:

• S/PDIF

• IEC60958 (formerly IEC958)

• JEITA CPR-1205 (formerly EIAJ CP-1201/340)

• AES3

• EBU Tech 3250 (also known as AES/EBU)

Analog-to-Digital Converter (ADC)

The integrated ADC within the PCM9211 is capable of supporting 24-bit data from 16 kHz up to 96 kHz. The

signal-to-noise ratio (SNR) of the ADC module at 96 kHz is 101 dB.

The PCM9211 contains integrated front-end buffer amplifiers for the ADC, thereby reducing the need for external

amplifiers. The ADC also has several digital features, including digital volume control (adjustable from –100 dB to

+20 dB in 0.5-dB steps), digital mute, and the ability to phase-invert the digital output.

Additionally, interrupts can be generated based on the ADC inputs being larger than user-defined threshold

levels.

In standalone mode, the ADC can be either a clock master or a clock slave.

Product Folder Link(s): PCM9211