PCM2902BDB

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PCM2902BDB is a low cost stereo Codec from Texas Instruments. It features a DAC, a stereo ADC and a headphone amplifier, an integrated multiplexer, a line-level output driver, and a microphone preamplifier. The Codec is used in audio applications such as audio-visual (A/V) systems, multimedia terminals, TV sets, sound systems and portable audio players.

The PCM2902BDB is a single chip, low power stereo CODEC with both analog and digital levels, which supports the dual-channel CD-quality audio interface. The device contains a high-performance, low-noise stereo DAC, a stereo ADC and a headphone amplifier, an integrated multiplexer, a line-level output driver, and a microphone preamplifier. The microphone preamplifier is designed to deliver a high SNR with low THD+N performance.

The PCM2902BDB is designed using a 90nm process technology and comes with an embedded, low-power control algorithm that allows designers to optimize power usage during playback and recording. The power management algorithm simplifies software coding and increases performance.

The PCM2902BDB is an ideal product for applications where low power and cost are the overriding design constraints, providing a complete audio solution with low power consumption, low audio distortion and easy implementation. The device operates from a single 1.65V to 3.6V supply. It is packaged in a 28-pin QFN (5×5mm).

The PCM2902BDB device offers a wide range of functions, such as support for PCM and PDM, integrated SRC, PGA, multiplexer, and a headphone driver. It supports sampling frequencies of 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz and it is capable of achieving SNR up to 96dB and THD+N as low as 0.001%.

The PCM2902BDB features an integrated SRC (Sample Rate Conversion) module that can be used either directly or by the programmer to easily support different sample rates and provide high-performance audio reproduction. The PGA (Programmable Gain Amplifier) can be controlled independently for each of the two stereo ADC channels and provides a wide range of gain settings. It also features an DAC volume control, which supports up to 32 levels and a De-Emphasis control for low clock rates.

The PCM2902BDB offers an integrated 16-channel multiplexer, which allows multiple functions to be controlled by one line. It also has an integrated microphone preamplifier designed to allow low output from most microphones and to provide a noise-free signal. The integrated multiplexer allows for a flexible design with minimal external components.

The PCM2902BDB also features an integrated headphone amplifier, which allows for a high SNR with low THD+N performance. It also provides a low impedance drive capability and supports up to 8-channel output. The headphone amplifier can drive up to 10V peak-to-peak voltage, which is more than enough for most applications.

Lastly, the integrated line-level output driver on the PCM2902BDB allows for a simple and cost effective interface to external devices such as speakers and amplifiers. It can drive up to 10V peak-to-peak voltage and supports differential or single-ended output.

In summary, the PCM2902BDB is an ideal product for low power and cost applications, where a complete audio solution with low noise, low distortion and easy implementation is required. With its integrated multiplexer, the PCM2902BDB helps to reduce external components and costs. It also supports a wide range of applications with its low power control algorithm, integrated SRC, PGA and headphone amplifier.

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