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Introduction
The STA330 is a DIGITAL stereo audio processor with analog and DIGITAL input. It includes an audio DSP and FFX, a ST proprietary high-efficiency class-D driver. In conjunction with a power device, the STA330 provides high-quality DIGITAL amplification.

Features
■ Up to 96 dB dynamic range
■ Sample rates from 8 kHz to 192 kHz
■ FFX (DIGITAL modulation) class-D driver
■ DIGITAL supply voltage from 1.5 V to 3.6 V
■ Analog supply voltage from 1.5 V to 3.6 V
■ 18-bit audio processing and class-D FFX DIGITAL modulator
■ 100-dB SNR analog to DIGITAL converter
■ DIGITAL volume control:
   – +36 dB to -105 dB in 0.5 dB steps
   – Software volume update
■ Individual channel and master gain/attenuation
■ Automatic invalid-input detect mute
■ 2-channel serial input/output data interface
■ DIGITALly controlled pop-free operation

Description
The CXD3027R is a DIGITAL signal processor LSI for CD players. This LSI incorporates a DIGITAL servo, high & bass boost, shock-proof memory controller, 1-bit DAC and analog low-pass filter.

Features
• All DIGITAL signal processing during playback is performed with a single chip
• Highly integrated mounting possible due to a built-in RAM

Overview
The LC78855KM is a Σ∆ D/A converter with built-in DIGITAL filters for use in DIGITAL audio products.

Features
• 8× oversampling DIGITAL filters
• DIGITAL de-emphasis (for Fs = 44.1 kHz)
• DIGITAL attenuation (with serial input)
• Soft muting (with parallel inputs)
• Supports double-speed playback.
• Supports a 384 fs system clock.
• PWM output
• Single 5 V power supply
• Si gate CMOS process

Description
The CXD2587Q is a DIGITAL signal processor LSI for CD players. This LSI incorporates a DIGITAL servo, DIGITAL filter, zero detection circuit, 1-bit DAC and analog low-pass filter.

Overview
The LC78856M and LC78856V are ∑∆-type DIGITAL-audio D/A converter circuits with built-in DIGITAL filters.

Features
• 8× oversampling DIGITAL filter
• DIGITAL de-emphasis (supports fs = 44.1 kHz)
• Soft muting
• Double speed support
• Support for a 384fs system clock
• PWM outputs
• 5 V single-voltage power supply
• Si-gate CMOS process

OVERVIEW
The SM5803AP/APT is a multi-function DIGITAL filter for DIGITAL audio fabricated using NPCs original molybdenum-gate CMOS technology.

4 FOLD OVER SAMPLING DIGITAL FILTER FOR DIGITAL AUDIO

Description
The CXD3068Q is a DIGITAL signal processor LSI for CD players. This LSI incorporates a DIGITAL servo.

Features
• All DIGITAL signal processings during playback are performed with a single chip
• Highly integrated mounting possible due to a built in RAM

Applications
CD players

Features:
• 16–Bit Serial Data Input (Two’s Complement)
• Interpolated Data Replaces Erroneous Data Samples
• –12dB Attenuation via the Active Low Attenuation Input Control (ATSB)
• Smoothed Trasitions Before and After Muting
• Two Identical Finite Impulse Response Transversal Filters each with a Sampling Rate of Four Times that of the Normal DIGITAL Audio Data
• DIGITAL Audio Output of 32–Bit Words Transmitted in Biphasemark Code

Applications:
• Compact Disc DIGITAL Audio System
• DIGITAL Filter

Description
The CXD3017Q is a DIGITAL signal processor LSI for CD players. This LSI incorporates a DIGITAL servo, DIGITAL filter, zero detection circuit, 1-bit DAC and analog low-pass filter.

Features
DIGITAL Signal Processor (DSP) Block
• 1×, 2×, 4× speed playback supported
• 16K-RAM
• EFM data demodulation
• Enhanced EFM frame sync signal protection
• SEC strategy-based error correction
• Subcode demodulation and Sub Q data error detection
• DIGITAL spindle servo
• 16-bit traverse counter
• Asymmetry compensation circuit
• CPU interface on serial bus
• Error correction monitor signal, etc. output from a new CPU interface
• Servo auto sequencer
• DIGITAL audio interface outputs
• DIGITAL level meter, peak meter
• CD TEXT data demodulation

DIGITAL Servo (DSSP) Block
• Microcomputer software-based flexible servo control
• Offset cancel function for servo error signal
• Auto gain control function for servo loop
• E:F balance, focus bias adjustment function
• Surf jump function supporting micro two-axis
• Tracking filter: 6 stages, focus filter: 5 stages

DIGITAL Filter, DAC and Analog Low-pass Filter Blocks
• DBB (DIGITAL bass boost) function
• Double-speed playback supported
• DIGITAL de-emphasis
• DIGITAL attenuation
• 8Fs oversampling filter

Applications
CD players