The CS8421 is a high-performance, 32-bit asynchronous stereo sample-rate converter capable of handling sample rates up to 211 kHz. It features a dynamic range of 175 dB and a total harmonic distortion plus noise (THD+N) of -140 dB, ensuring high audio fidelity. The device supports various digital audio input and output formats, including 16-, 20-, 24-, and 32-bit data, and can operate without an external master clock due to its integrated oscillator. The CS8421 offers flexible input/output configurations through 3-wire serial digital audio ports and supports both master and slave modes. It includes a time division multiplexing (TDM) mode for connecting multiple devices, allowing for phase-matched outputs. The converter also features a bypass mode for direct clock and data transfer without conversion. Available in space-saving 20-pin TSSOP and QFN packages, the CS8421 is suitable for applications in digital recording systems, automotive audio, and professional audio equipment.
The CS8421 is a 32-bit, 192 kHz, asynchronous, stereo sample-rate converter. Digital audio inputs and outputs can be 32-, 24-, 20-, or 16-bits. Input and output data can be completely asynchronous, synchronous to an external data clock or the part can operate without any external clock by using an integrated oscillator. Audio data is input and output through configurable 3-wire input/output ports and the part does not require any software control for mode configuration. The CS8421 supports a TDM mode, which enables several of these ICs to be serially connected together, allowing their output data to be multiplexed onto one line for input into a DSP or other TDM-capable multichannel device. When operating in this mode, the phase of output data for each device is matched. Also included is a bypass mode that allows the input clock and data to be passed directly to the output port without sample-rate conversion. Designers will appreciate the device's ease of use — simple hardware configuration eliminates the need for an external microcontroller. Another benefit is the space-saving package size — the part is available in a 20-pin TSSOP or 20-pin QFN. Delivering unrivaled performance of 175 dB dynamic range and -140 dB THD+N, the CS8421 provides a solution to designers with transparent data conversion, thus maintaining the sound quality in their products. Applications include consumer electronics devices, automotive audio systems, computer sound cards and pro audio equipment such as digital mixing consoles, effects processors and multitrack digital recorders.
| Cirrus Logic, Inc. | |
|---|---|
| Product Category | Audio Processor ICs |
| Product Number | CS8421 |
| Product Name | 32-bit, 192 kHz, Asynchronous Stereo Sample-Rate Converter |
| Input Signal | Digital |
