Product specifications
CS4308P - High Performance Multichannel Audio DAC
he CS4308P is a high-performance, 32-bit resolution, eight-channel DAC. Digital input is supported via the audio serial port (ASP) at sample rates up to 768 kHz. Configurable low-latency digital-interpolation filters are provided. A DSD input path is also available, supporting direct playback modes at up to 512×fs oversample rate.
The DAC incorporates a proprietary analog FIR architecture to reduce out-of-band noise and minimize the external component requirements. The differential current-mode output enables a single-stage external op-amp circuit to combine the current-to-voltage conversion and out-of-band filtering, supporting flexible integration and optimal dynamic range for the target application.
The CS4308P can be configured using a control interface supporting I 2C and SPI modes of operation. The device can also be operated in hardware mode, using external resistors to select the required configuration. Multiple hardware-control options are supported, including system clocking, ASP format, sample rate, and digital-filter selection.
The low-latency digital filters are optimized for the applicable sample rate. Fast or slow roll-off filters can be combined with minimum or linear phase responses to support the desired signal characteristics. A de-emphasis filter is also available.
The ASP supports multichannel operation in I 2S, left-justified, and TDM data formats. Four data-input pins support 32-bit multichannel operation up to 384 kHz (eight channels) or 768 kHz (four channels).
The Direct Stream Digital (DSD) input path supports six-channel operation at oversample rates up to 512×fs.
Clocking for the CS4308P can be derived from the ASP or DSD interface, or else provided from a separate clock source. An integrated phase-locked loop (PLL) is used to reduce jitter and to support a range of reference-clock frequency options. The DAC-conversion timing is referenced to the ASP data frame, enabling time-aligned operation across multiple devices sharing a common data bus.
The CS4308P can be powered from a single 3.3 V supply; an integrated regulator provides the 1.2 V digital-core supply. Digital input/output at 1.8 V logic levels is also possible using a separate external supply. The device combines high performance with low power consumption.
The CS4308P is available in a commercial-grade 0.4 mm pitch, 48-pin QFN package for operation from –40° to +85°C.
Features:
- High performance eight-channel DAC: Differential analog architecture, High-resolution 32-bit digital architecture, Low-latency digital filters and digital volume control
- Current-mode output for optimal dynamic range into application-specific output buffer
- PLL supports range of external system-clock references
- Sample timing alignment across multiple devices
- Audio serial port (ASP) sample rates up to 768 kHz: I2S, left-justified, and TDM data formats
- DSD interface operating up to 512×fs oversample rate
- Hardware and software control modes: I2C control port up to 1 MHz, SPI control port up to 24 MHz, Hardware control with no host processor required
- Single-supply operation at 3.3 V: Support for 1.8 V–3.3 V digital input/outputs
- 48-pin QFN package
Specifications:
- Enhanced oversampling sigma-delta DAC: 123 dB dynamic range (A-weighted), –115 dB total harmonic distortion + noise (THD+N), 4.5/Fs group delay at 96 kHz sample rate (slow roll-off, minimum-phase filter)
Applications:
- A/V receivers
- Digital mixing consoles
- High-performance speakers and soundbars
- DAW interfaces
- Musical instruments
Ordering codes:
- CS4308P–DN: Tray
- CS4308P–DNR: Tape & Reel
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