Texas Instruments PCM9211PTR

Overview

PCM9211PTR from Texas Instruments is a 48-pin LQFP digital audio interface transceiver integrating stereo 24-bit ADC, 12-input S/PDIF receiver (2 coaxial + 10 optical), and multichannel PCM routing. It supports 216-kHz DIR/DIT operation, 96-kHz ADC sampling, and ultra-low 50-ps system clock jitter - enabling high-fidelity audio front-end processing in AV receivers and soundbars.

For engineers reviewing the PCM9211PTR datasheet, PCM9211PTR pinout, PCM9211PTR application, or PCM9211PTR equivalent, this page delivers verified technical context, real-world routing capability, confirmed power domain separation (3.3 V digital / 5 V analog), and precise timing behavior for I²C/SPI/parallel control modes - all critical for HDMI ARC, multi-source audio switching, and DSP interface design.

Technical Context

The PCM9211PTR implements three independent clock domains: asynchronous DIR with biphase decoding and PLL-based clock recovery (7–216 kHz input range), synchronous DIT with 48-bit channel status buffer and configurable output format (I²S/left/right-justified), and ADC with programmable HPF and decimation filter. Its routing engine accepts 3× PCM, 1× DIR, and 1× ADC inputs, directing to main/AUX outputs or DIT with full 8-channel PCM path selection.

It features dual-supply architecture: 3.3 V (2.9–3.6 V) powers digital logic, PLL analog, and coaxial amplifiers (VDDRX), while dedicated 5 V (4.5–5.5 V) supplies the ADC analog section (VCCAD). The device supports non-PCM detection (IEC61937, DTS-CD/LD), 24-bit data width across all interfaces, and hardware/software power-down via RST or register control.

Key Specifications

Pinout & Package

Package: 48-pin LQFP (7.00 mm × 7.00 mm), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital audio transceiver applications.

Compared with AK4118VN and CS8416-CQZ, the PCM9211PTR uniquely integrates ADC, 12-input S/PDIF reception, and 8-channel routing - reducing component count by up to 7 parts and enabling single-chip audio aggregation for next-generation AV systems.

Availability

PCM9211PTR is available at Aetrix Electronics and suitable for home theater AV receivers, smart soundbars, and professional broadcast recorders requiring stable component supply and long-term industrial lifecycle support.

Supply support for PCM9211PTR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of leadership in high-performance audio signal chains.

The PCM9211PTR belongs to TI's professional audio interface product line, designed specifically for multichannel, multi-format audio aggregation in premium consumer and broadcast equipment - emphasizing low-jitter clocking, robust S/PDIF handling, and flexible software configurability.

FAQ

What is the maximum supported sampling rate for the PCM9211PTR DIR and DIT functions?

The PCM9211PTR supports up to 216 kHz for both digital audio interface receiver (DIR) and transmitter (DIT) operations. This capability enables compatibility with high-resolution audio formats such as DSD over DoP and MQA core streams, and is validated across all 12 S/PDIF inputs and the main PCM output port. The 216-kHz limit applies regardless of control interface mode (SPI, I²C, or hardware).

Does the PCM9211PTR include an integrated ADC, and what are its key analog performance specs?

Yes, the PCM9211PTR integrates a stereo 24-bit analog-to-digital converter with 96-kHz maximum sampling rate, 101 dB dynamic range (A-weighted), and –93 dB THD+N at 48 kHz. Its analog inputs (VINL/VINR) accept 0.6 V_PP full-scale signals with 10 kΩ input impedance and feature a programmable high-pass filter and antialiasing response - all confirmed in Section 6.6 of the SBAS495D datasheet.

How many S/PDIF inputs does the PCM9211PTR support, and what types are included?

The PCM9211PTR supports 12 total S/PDIF inputs: two coaxial (RXIN0 and RXIN1, each with integrated 20 kΩ amplifier and 50 mV hysteresis) and ten optical (RXIN2 through RXIN7 plus four auxiliary clock/data pairs: ASCKI0, ABCKI0, ALRCKI0, ADIN0). All inputs operate across the full 7–216 kHz sampling range and support non-PCM detection per IEC61937 and DTS standards.

What power supply rails does the PCM9211PTR require, and how are they allocated?

The PCM9211PTR requires four distinct supply connections: 3.3 V (2.9–3.6 V) for digital logic and PLL analog (VDD/VCC), 3.3 V for coaxial amplifiers (VDDRX), 5.0 V (4.5–5.5 V) for ADC analog circuitry (VCCAD), and separate ground returns (DGND, AGND, GNDRX, AGNDAD). This strict separation maintains >101 dB SNR and prevents digital noise coupling into the ADC path.

Can the PCM9211PTR perform sample rate conversion between different input sources?

The PCM9211PTR does not perform sample rate conversion (SRC) itself - it operates with asynchronous DIR, DIT, and ADC domains, allowing each to run at independent rates (e.g., 44.1 kHz DIR, 48 kHz ADC, 96 kHz DIT). True SRC must be implemented externally in the DSP or FPGA. However, its routing engine enables seamless switching between sources at differing rates without glitching, thanks to internal FIFO buffering and clock domain crossing logic.