Texas Instruments PCM3000E

Overview

PCM3000E from Texas Instruments is an 18-bit stereo audio codec IC integrating monolithic delta-sigma ADC and DAC with single-ended analog voltage inputs/outputs, 64× oversampling ADC digital decimation filter, 8× oversampling DAC digital interpolation filter, and three-wire serial mode control interface - used in cost-sensitive consumer audio systems requiring THD+N ≤ –88 dB and SNR ≥ 94 dB at 44.1 kHz.

For engineers reviewing the PCM3000E datasheet, PCM3000E pinout, PCM3000E application, or PCM3000E equivalent, this page delivers verified package mapping (SSOP-28), confirmed pin functions (e.g., LRCIN, BCKIN, DIN, DOUT), exact ADC/DAC performance specs (THD+N, SNR, pass-band ripple), and two validated alternative parts for stereo audio codec selection.

Technical Context

The PCM3000E implements a dual-path delta-sigma architecture: left/right ADCs use 64× oversampling with digital high-pass filtering and ±0.05 dB pass-band ripple decimation filters; DACs employ 8× oversampling interpolation, digital attenuation (256 steps), de-emphasis, soft mute, and analog low-pass filtering with –0.16 dB response at 20 kHz.

It supports seven programmable audio data formats (I²S, left/right-justified, DSP-frame) via serial interface pins MC/MD/ML, accepts system clocks at 256f_S/384f_S/512f_S, operates from a single 5-V supply, and integrates separate analog/digital grounds (AGND1/AGND2/DGND) and power domains (VCC1/VCC2/VDD) to minimize crosstalk.

Key Specifications

Pinout & Package

PCM3000E is housed in a 28-pin SSOP (Shrink Small Outline Package) with 0.65 mm lead pitch, optimized for compact consumer audio PCB layouts and compatible with standard surface-mount reflow processes.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar stereo audio codec applications.

Compared with PCM3000E, PCM3001E eliminates serial control overhead but sacrifices runtime format flexibility, while AK4552VN offers superior resolution and noise performance at the cost of supply voltage compatibility and package redesign - PCM3000E remains optimal for 5-V, firmware-configurable, space-constrained stereo audio systems.

Availability

PCM3000E is available at Aetrix Electronics and suitable for sampling keyboards, digital mixers, karaoke systems, and DSP-based car stereo applications requiring stable component supply and long-term industrial availability.

Supply support for PCM3000E 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, embedded processing, and connectivity technologies, with decades of expertise in high-performance audio signal chain solutions.

The PCM3000E belongs to TI's legacy stereo audio codec product line, engineered specifically for cost-sensitive consumer electronics demanding CD-quality audio fidelity, single-supply operation, and minimal external component count.

FAQ

What is the maximum sampling rate supported by the PCM3000E?

The PCM3000E supports a maximum sampling rate of 48 kHz, with corresponding system clock frequencies of 12.288 MHz (256f_S), 18.432 MHz (384f_S), or 24.576 MHz (512f_S). It also operates down to 4 kHz, making it suitable for both voice and full-bandwidth audio applications. The PCM3000E maintains specified THD+N and SNR performance across this entire range when powered at 5 V and operated within its temperature limits.

Does the PCM3000E require external antialiasing or reconstruction filters?

No, the PCM3000E integrates internal analog antialiasing filters (cutoff ~170 kHz with 470 pF external capacitor) and analog low-pass reconstruction filters (–0.16 dB at 20 kHz). These on-chip filters eliminate the need for external passive RC networks in most consumer applications, reducing BOM count and PCB area. External capacitors (CINPL/CINNL/CINPR/CINNR) are required to set the antialiasing pole, but no additional op-amp or active filtering is necessary.

How does the PCM3000E handle system clock synchronization loss?

When synchronization between LRCIN and the system clock drifts beyond ±6 bit clocks per sample period, the PCM3000E halts internal DAC/ADC operation within 1/f_S and forces analog outputs to bipolar zero (VCOM = 0.5 × VCC2) and digital outputs to zero code. Recovery occurs automatically once synchronization is restored within ±5 bit clocks. This behavior prevents undefined output states and audible clicks during clock domain instability - a critical feature in systems using asynchronous audio sources.

Can the PCM3000E operate from a 3.3-V supply?

No, the PCM3000E is specified only for 4.5–5.5 V operation on all supply pins (VCC1, VCC2, VDD). Its analog front-end, delta-sigma modulators, and digital I/O thresholds are designed for TTL-compatible 5-V logic levels. Attempting 3.3-V operation violates absolute maximum ratings and will result in degraded performance or functional failure. For 3.3-V systems, consider newer TI codecs like the PCM3168A or third-party alternatives explicitly rated for 3.3-V operation.

What is the function of the RSTB pin on the PCM3000E?

The RSTB pin (pin 28) is an active-low asynchronous reset input that initiates a 1024-system-clock-cycle initialization sequence upon rising edge detection. During reset, DAC outputs settle to VCOM (0.5 × VCC2) and ADC outputs go to zero code. The PCM3000E requires the system clock (XTI or CLKIO) to be active and VDD > 4 V before reset assertion. A minimum pulse width of 40 ns is required, and the internal pullup resistor (~70 kΩ) allows single-resistor tie-high for default non-reset operation.