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FEATURES

· Multilevel DAC Including Headphone Amplifier

· Analog Performance (VCC, VHP = 2.4 V):

– Dynamic Range: 98 dB Typ

– THD+N at 0 dB: 0.1% Typ

– THD+N at –20 dB: 0.04% Typ

– Output Power at RL = 16 W: 13 mW

(Stereo), 26 mW (Monaural)

· 1.6-V to 3.6-V Single Power Supply

· Low Power Dissipation: 6.5 mW at VCC, VHP =

2.4 V

· System Clock: 128 f S, 192 fS, 256 fS, 384 fS

· Sampling Frequency: 5 kHz to 50 kHz

· Software Control (PCM1770):

– 16-, 20-, 24-Bit Word Available

– Left-, Right-Justified, and I2S

– Slave/Master Selectable

– Digital Attenuation: 0 dB to –62 dB, 1

dB/Step

– 44.1-kHz Digital De-Emphasis

– Zero Cross Attenuation

– Digital Soft Mute

– Monaural Analog-In With Mixing

– Monaural Speaker Mode

· Hardware Control (PCM1771):

– Left-Justified and I2S

– 44.1-kHz Digital De-Emphasis

– Monaural Analog-In With Mixing

· Pop-Noise-Free Circuit

· 3.3-V Tolerant

· Packages: TSSOP-16 and VQFN-20

APPLICATIONS

· Portable Audio Player

· Cellular Phone

· PDA

· Other Applications Requiring Low-Voltage

Operation

DESCRIPTION

The PCM1770 and PCM1771 devices are CMOS,

monolithic, integrated circuits which include stereo

digital-to-analog converters, headphone circuitry, and

support circuitry in small TSSOP-16 and VQFN-20

packages.

The data converters use TI's enhanced multilevel D-S

architecture, which employs noise shaping and

multilevel amplitude quantization to achieve excellent

dynamic performance and improved tolerance to

clock jitter. The PCM1770 and PCM1771 devices

accept several industry standard audio data formats

with 16- to 24-bit data, left-justified, I2S, etc.,

providing easy interfacing to audio DSP and decoder

devices. Sampling rates up to 50 kHz are supported.

A full set of user-programmable functions is

accessible through a 3-wire serial control port, which

supports register write functions.