The new PCM1865 audio ADC, driven by a single 3.3V power supply, eliminates the need for the analog 5V rail typically required, enabling smaller and more efficient product designs. Additionally, each product integrates features into a single device to address various system design challenges, such as hum noise, ground noise, input signal level sensitivity, and attenuation. The realization of such advanced functional integration is useful for the development of finished products such as personal computers, soundbars, audio docks, Bluetooth® speakers, video security systems, and automotive infotainment equipment (aftermarket head units, amplifiers, dynamic noise cancellation systems, etc.).

Advantages of the PCM1865 product family

• Design Flexibility: The PCM1865 family consists of six pin-to-pin compatible products, allowing you to choose between 2-channel or 4-channel, software-controlled or hardware-controlled products.

• High Dynamic Range: Three out of the six products in the PCM1865 family achieve performance up to 110dB. No audio ADC currently on the market achieves 110dB performance with a single 3.3V power supply.

• Improved Signal-to-Noise Ratio (SNR): These devices directly support high voltage 2.1 VRMS, optimizing audio quality and enabling higher SNR. In addition, software-controlled products provide automatic clipping suppression, allowing for the optimization of input sensitivity while achieving maximum SNR.

• Reduced system complexity: These new audio ADC products reduce up to 20 components while achieving the same performance level as competing solutions. In addition, by integrating a clock-generating PLL (phase-locked loop), a programmable gain amplifier, and a general-purpose front end (supporting a variety of inputs from low-level microphones to 4.2 VRMS differential inputs), designers can easily configure it to eliminate hum and ground noise with single-ended or differential inputs.

• Meets Standby Power Standards: These products meet the requirements set by the European Union (EU) Ecodesign regulations by integrating TI's patented Energysense technology. By utilizing an on-chip secondary ADC, designers can conveniently set "sleep" and "wake-up" thresholds, allowing the finished product to easily achieve the energy efficiency standards stipulated by EU regulations.

• Miniaturization for space-constrained applications: These products are available in a 7.8mm x 4.4mm TSSOP package, allowing them to be designed up to 45% smaller than competing devices.

Tools and design support

To support developers in starting development using the PCM1865 family, easy-to-use evaluation modules (EVMs), including the PCM1865 EVM, are provided. These evaluation modules are available for purchase at the TI store for $149.

In the TI E2E™ community's audio converter forum, engineers can find solutions to problems, get help from fellow engineers and TI experts, and share knowledge and solve issues.