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The PCM1740 is a complete stereo audio digital-to-analogconverter with on-chip PLL and VCXO. The PCM1740 isdesigned specifically for set-top box applications requiringhigh-quality audio playback, a precision tuned 27MHz mas-ter clock source, and support for multiple audio-samplingfrequencies.
The stereo D/A converter utilizes multi-bit, delta-sigmaarchitecture, which includes an 8x interpolation filter, third-order noise shaping, 5-level amplitude quantization, and ananalog low-pass filter. The PCM1740 includes a number ofuser-programmable functions, which are accessed via astandard I2C-Bus interface.
PCM1740 Maximum Ratings
Power Supply Voltage(1).................................................. +6.5V Supply Voltage Differences(2).......................................... ±0.1V GND Voltage Differences(3).............................................. ±0.1V Digital Input Voltage ................................ 0.3V to (VDD + 0.3V) Analog Input Voltage ................................0.3V to (VCC + 0.3V) Input Current (any pins except supplies) ....................... ±10mA Operating Temperature Range ...................... 25°C to +85°C Storage Temperature .....................................55°C to +125°C Junction Temperature ..................................................... +150°C Lead Temperature (soldering, 5s) ................................... +260°C Package Temperature (IR reflow, peak, 10s) .................. +235°C
PCM1740 Features
COMPLETE DELTA-SIGMA STEREO DAC VOLTAGE-CONTROLLED CRYSTALOSCILLATOR: 27MHz ±150ppm Output with0V to 3V Input PROGRAMMABLE PLL256fS or 384fS Audio System Clock Output DYNAMIC PERFORMANCE:Dynamic Range: 94dBSNR: 94dBTHD+N: 89dB SAMPLING FREQUENCIES:16kHz, 22.05kHz, 24kHz32kHz, 44.1kHz, 48kHz64kHz, 88.2kHz, 96kHz SERIAL AUDIO INTERFACE:Standard or I2S Data Formats16-, 20-, or 24-Bit Data I2C-BUS® INTERFACE FOR CONTROLREGISTERS(1):Slave Receiver Operation7-Bit AddressingStandard Transfer Rate (up to 100kbps) PROGRAMMABLE CONTROLS:Digital Attenuation (256 steps)Soft MuteInfinite Zero Detect MuteDe-Emphasis (32kHz, 44.1kHz, 48kHz)DAC Output Mode SINGLE +5V SUPPLY SMALL SSOP-24 PACKAGE