PCM56P-J

The PCM56P-J is a high-speed, low distortion, and low-noise CMOS digital/analog audio signal processor from Texas Instruments. It is designed to provide a cost-effective solution for wide-ranging audio applications. The PCM56P-J converts stereo PCM audio samples from a digital source into analog audio or from analog to linear PCM codes with high accuracy.

The PCM56P-J is used in data acquisition, specifically with ADCs/DACs and special purpose audio processors. It supports a wide variety of applications in different verticals, including automotive media systems, home audio systems, industrial facilities, multimedia products, and broadcast microphone systems.

This device is designed to provide superior audio performance while reducing overall cost and complexity of the system. It features low power dissipation and offers high degree of channel-to-channel matching, channel crosstalk, and signal-to-noise ratio (SNR). The PCM56P-J is also capable of generating and integrating low distortion tones for low frequency compensation.

The PCM56P-J utilizes a 48-bit digital signal processor (DSP) for signal processing tasks, such as resampling, peak level detection, and local oscillator (LO) control. The DSP allows users to implement sophisticated signal control algorithms within the PCM56P-J.

The PCM56P-J works by converting analog audio samples into digital PCM codes or PCM codes into analog audio samples. It consists of a programmable A/D and D/A converter, an internal digital memory, a local oscillator (LO) control logic, and a signal processor.

The PCM56P-J features a throughput rate of up to 192 kHz, with a sample rate of 48 kHz per channel. It has a full-scale signal of +5V (± 2.5V) and a minimum signal level of ­55 dBV. The sampling depth is 24 bits and the channel matched error is better than ± 0.1 dB.

To convert an analog audio sample into a digital PCM code, the PCM56P-J first filters the input audio sample with an anti-aliasing filter to reduce high frequency components. It then converts the signal from the analog domain to the digital domain with an A/D converter. The signal is then stored in the internal memory for further processing.

The signal processor then performs digital signal processing tasks, such as resampling, peak level detection, and LO control. The data is then converted from the digital domain to the analog domain with a D/A converter. The output signal is then filtered with a low-pass filter to reduce unwanted components before it is sent to the output.

To convert a digital PCM code into an analog audio sample, the PCM56P-J will first read the PCM code from the internal memory and convert the signal from the digital domain to the analog domain using a D/A converter. The signal is then filtered with a low-pass filter to reduce unwanted components, which is then outputted.

The PCM56P-J is designed to provide superior audio performance with low power consumption. It features a low-noise, low-distortion design and a high degree of channel-to-channel matching. It is an excellent choice for wide-ranging audio applications, including automotive, industrial, broadcast, and multimedia applications.