Description

The SM5841HS is a high-quality digital audio filter designed for use in digital audio reproduction equipment. It features 8 times oversampling, digital deemphasis, noise shaping, digital filtration, and other advanced circuits.

Specifications and features

• 2-channel processing
• 8-times (8fs) oversampling (interpolation)
• Digital deemphasis (fs = 48/44.1/32 kHz)
• Serial input data: 2's complement, MSB first, 16/18-bit
• Serial output data: 2's complement, MSB first, 16/18/20-bit
• 1st-order noise shaper (for 16/18-bit output only)
• 256fs/384fs system clock selectable
• Output data DC offset (approximately 0.8%): ON/OFF control
• TTL-compatible input/outputs
• 5 V (standard) supply
• 3.2 V operating voltage
• Molybdenum-gate CMOS
• 3-stage DC FIR interpolation filter: 1st stage (fs → 2fs), 69-tap; 2nd stage (2fs → 4fs), 13-tap; 3rd stage (4fs → 8fs), 9-tap
• IIR deemphasis filter for gain and phase characteristics close to those of analog filters
• Overflow limiter built-in

Application Scenarios

The SM5841HS is suitable for use in a wide range of digital audio reproduction equipment, including digital amplifiers, CD players, DAT players, DBS systems, and PCM systems.

Comparison

• High-quality digital audio filtering
• 8-times oversampling improves audio quality
• Supports a variety of input and output data formats
• Features digital deemphasis and noise shaping for better signal-to-noise ratio
• Output data DC offset control
• Supports a wide range of applications

• May not be suitable for all digital audio equipment
• Requires a standard 5 V power supply, which could be an issue for some applications
• May be more expensive than some alternative digital filters