FEATURES
COMPLETE DELTA-SIGMA STEREO DAC
VOLTAGE-CONTROLLED CRYSTAL OSCILLATOR:
27MHz ±150ppm Output with 0V to 3V Input
PROGRAMMABLE PLL
256fS or 384fS Audio System Clock Output
DYNAMIC PERFORMANCE:
Dynamic Range: 94dB
SNR: 94dB
THD+N: –89dB
SAMPLING FREQUENCIES:
16kHz, 22.05kHz, 24kHz
32kHz, 44.1kHz, 48kHz
64kHz, 88.2kHz, 96kHz
SERIAL AUDIO INTERFACE:
Standard or I2S™ Data Formats
16-, 20-, or 24-Bit Data
I2C-BUS™ INTERFACE FOR CONTROL
REGISTERS:
Slave Receiver Operation
7-Bit Addressing
Standard Transfer Rate (up to 100kbps)
PROGRAMMABLE CONTROLS:
Digital Attenuation (256 steps)
Soft Mute
Infinite Zero Detect Mute
De-Emphasis (32kHz, 44.1kHz, 48kHz)
DAC Output Mode
SINGLE +5V SUPPLY
SMALL SSOP-24 PACKAGE

APPLICATIONS
SET-TOP BOXES
DIGITAL BROADCAST RECEIVERS

DESCRIPTION
The PCM1740 is a complete stereo audio digital-toanalog
converter with on-chip PLL and VCXO. The
PCM1740 is designed specifically for set-top box applications
requiring high-quality audio playback, a precision
tuned 27MHz master clock source, and support for multiple
audio-sampling frequencies.
The stereo digital-to-analog converter (DAC) uses multibit,
delta-sigma architecture, which includes an 8x interpolation
filter, 3rd-order noise shaping, 5-level amplitude
quantization, and an analog low-pass filter. The PCM1740
includes a number of user-programmable functions, which
are accessed via a standard I2C-Bus interface.