Description

The CS8421-CZZ is a 32-bit, high-performance, monolithic CMOS stereo asynchronous sample-rate converter. It supports digital audio inputs and outputs of 32, 24, 20, or 16 bits. The input and output data can be completely asynchronous or synchronous to an external clock. It can also operate without any external clock by using its integrated oscillator. The CS8421-CZZ features configurable 3-wire input/output ports and does not require any software control. It is suitable for various applications including digital recording systems, digital mixing consoles, high-quality D/A, effects processors, computer audio systems, and automotive audio systems. It can also be used as an asynchronous decimation or interpolation filter.

Specifications and features

• 175 dB Dynamic Range
• -140 dB THD+N
• No Programming Required
• No External Master Clock Required
• Supports Sample Rates up to 211 kHz
• Input/Output Sample Rate Ratios of 7.5:1 to 1:8
• Master Clock Support for 128 x Fs, 256 x Fs, 384 x Fs, and 512 x Fs (Master Mode)
• 16-, 20-, 24-, or 32-bit Data I/O
• 32-bit Internal Signal Processing
• Dither Automatically Applied and Scaled to Output Resolution
• Flexible 3-wire Serial Digital Audio Input and Output Ports
• Master and Slave Modes for Both Input and Output
• Bypass Mode
• Time Division Multiplexing (TDM) Mode
• Attenuates Clock Jitter
• Multiple Device Outputs are Phase Matched
• Linear Phase FIR Filter
• Automatic Soft Mute/Unmute
• +2.5 V Digital Supply (VD)
• +3.3 V or 5.0 V Digital Interface (VL)
• Space-saving 20-pin TSSOP and QFN Packages

Application Scenarios

The CS8421-CZZ is widely used in digital recording systems (DVD-R/RW, CD-R/RW, PVR, DAT, MD, and VTR), digital mixing consoles, high-quality D/A, effects processors, computer audio systems, and automotive audio systems. It can also be used as an asynchronous decimation or interpolation filter to enhance audio performance.

Comparison

- High-performance and high-resolution audio conversion

- Wide range of supported sample rates

- Integrated oscillator for operating without external clock

- Flexible input/output configurations

- Multiple device outputs are phase matched

- Requires a 2.5 V digital supply and either a 3.3 V or 5.0 V digital interface