Texas Instruments PCM4201EVM

Overview

PCM4201EVM from Texas Instruments is an evaluation module designed to validate the performance and configuration of the PCM4201 single-channel 24-bit audio analog-to-digital converter. It supports differential XLR/TRS analog input, AES3 digital output via DIT4096, and configurable sampling modes up to 108 kHz - enabling rapid prototyping for professional portable audio systems including digital wireless microphones and high-fidelity recorders.

For engineers reviewing the PCM4201EVM datasheet, PCM4201EVM pinout, PCM4201EVM application, or PCM4201EVM equivalent, this page delivers verified hardware configuration details, clock source selection logic, power supply routing options (+15V/–15V/+5VA/+5VD/EXT VDD), and functional block-level interface mapping between the PCM4201, OPA2134 input buffer, and DIT4096 transmitter.

Technical Context

The PCM4201EVM implements a complete signal chain: differential analog input conditioned by an OPA2134-based active filter/attenuator (3.7× attenuation to match 5 V_PP full-scale), digitized by the PCM4201 ADC, then routed either directly via 10-pin header J3 (24-bit left-justified serial audio) or through a DIT4096 AES3 encoder to BNC output J5. System clocking supports Master mode (22.5792 MHz or 24.576 MHz onboard crystals) or Slave mode (external SCKI at 256f_S/512f_S).

Hardware configuration is managed entirely via 8-position DIP switch SW1, controlling sampling mode (Normal Speed Low Power/High Performance or Double Speed), Slave/Master port operation, digital high-pass filter enable/disable, DIT transmitter enable, and master clock rate selection (256f_S or 512f_S). Manual reset switches SW2 (PCM4201) and SW3 (DIT4096) provide on-demand initialization.

Key Specifications

Availability

PCM4201EVM is available at Aetrix Electronics and suitable for professional audio development, high-resolution ADC validation, and AES3 interface integration requiring stable component supply and documented reference design support.

Supply support for PCM4201EVM 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 company headquartered in Dallas, Texas, delivering analog, embedded processing, and connectivity solutions across industrial, automotive, and personal electronics markets.

The PCM4201EVM belongs to TI's precision audio evaluation platform family, engineered specifically to accelerate design-in of high-performance audio ADCs in battery-powered and studio-grade portable equipment where dynamic range, THD+N, and flexible clocking are critical.

FAQ

What is the primary function of the PCM4201EVM?

The PCM4201EVM is a dedicated evaluation module for the PCM4201 24-bit audio analog-to-digital converter. Its purpose is to provide a fully assembled, tested, and documented platform for validating the PCM4201's electrical performance, interface timing, clocking behavior, and system-level integration - especially in portable professional audio applications such as digital wireless microphones and field recorders. The PCM4201EVM includes all necessary support circuitry, including input buffering, clock generation, power regulation, and AES3 output encoding.

Does the PCM4201EVM support both Master and Slave clocking modes?

Yes, the PCM4201EVM supports both Master and Slave audio serial port operation. In Master mode, it generates BCK, FSYNC, and SCKI using either onboard 22.5792 MHz or 24.576 MHz crystal oscillators (X1/X2) or an external clock applied at J4. In Slave mode, those clocks are accepted via header J3 from an external source like a DSP or FPGA. Mode selection is controlled by the S/M position on DIP switch SW1, and compatible system clock rates (256f_S/512f_S) are defined per sampling mode in Tables 6 and 7 of the PCM4201EVM User's Guide.

Can the PCM4201EVM operate with a single-supply analog input stage?

Yes, the PCM4201EVM can be reconfigured for single-supply analog input operation. Jumper JMP2 allows the –15V rail to be shorted to ground, enabling use of a single positive supply (e.g., +15V adjusted to match op amp requirements). The input buffer uses an OPA2134 dual op amp, and resistor/capacitor values may be modified to adapt gain and bias for single-supply swing constraints - as noted in Section 3.2 of the PCM4201EVM User's Guide. This flexibility supports experimentation with alternative op amps beyond the default OPA2134.

What are the supported sampling rates and corresponding clock configurations for the PCM4201EVM?

The PCM4201EVM supports sampling rates up to 108 kHz across three modes: Normal Speed Low Power (≤54 kHz, 64× oversampling), Normal Speed High Performance (≤54 kHz, 128× oversampling), and Double Speed (≤108 kHz, 64× oversampling). For Master mode, 22.5792 MHz (X1) enables 44.1/88.2 kHz; 24.576 MHz (X2) enables 48/96 kHz. External clock input at J4 allows non-standard rates. Slave mode accepts SCKI at 256f_S or 512f_S, depending on selected mode - all configurations are set via SW1 and detailed in Tables 2–7 of the PCM4201EVM User's Guide.

Is the PCM4201EVM RoHS-compliant and suitable for commercial deployment?

No - the PCM4201EVM is explicitly designated by Texas Instruments for engineering development and evaluation only, not for commercial end-product use. As stated in the EVM IMPORTANT NOTICE, it lacks full safety, EMC, and regulatory compliance certification required for production deployment. It does not meet EU EMC Directive requirements and is intended solely for lab-based testing, characterization, and proof-of-concept work. Customers must implement their own certified design when transitioning from PCM4201EVM validation to final product manufacturing.