描述 Description

The PCM1741 is a CMOS, monolithic, integrated circuit which includes stereo Digital-to-Analog Converters (DACs) and support circuitry in a small SSOP-16 package. The data converters utilize Texas Instrument?s enhanced multilevel delta-sigma architecture that employs fourth-order noise shaping and 8-level amplitude quantization to achieve excellent dynamic performance and improved tolerance to clock jitter. The PCM1741 accepts industry standard audio data formats with 16- to 24-bit data, providing easy interfacing to audio DSP and decoder chips. Sampling rates up to 100kHz are supported. A full set of user-programmable functions are accessible through a 3-wire serial control port that supports register write functions.

特性 Features

? 24-BIT RESOLUTION
? ANALOG PERFORMANCE (VCC = +3.3V):
? Dynamic Range: 98dB typ
? SNR: 98dB typ
? THD+N: 0.005% typ
? Full-Scale Output: 2.05Vp-p typ

? 8x OVERSAMPLING DIGITAL FILTER:
? Stopband Attenuation: –55dB
? Passband Ripple: ±0.03dB

? SAMPLING FREQUENCY: 5kHz to 100kHz
? SYSTEM CLOCK: 256, 384, 512, 768fS with Auto Detect
? ACCEPTS 16-, 18-, 20-, AND 24-BIT AUDIO DATA
? DATA FORMATS: Standard, I2S, and Left-Justified
? USER-PROGRAMMABLE MODE CONTROLS:
? Digital Attenuation: 0dB to –63dB, 0.5dB/Step
? Digital De-Emphasis
? Digital Filter Roll-Off: Sharp or Slow
? Soft Mute
? Zero Flags for Each Output

? 3.3V SINGLE POWER SUPPLY
? 5V TOLERANT DIGITAL INPUTS
? SMALL SSOP-16 PACKAGE
? APPLICATIONS
? AV RECEIVERS
? DVD MOVIE PLAYERS
? DVD ADD-ON CARDS FOR HIGH-END PCs
? HDTV RECEIVERS
? CAR AUDIO SYSTEMS
? OTHER APPLICATIONS REQUIRING 24-BIT AUDIO