1 Features

1• 32-Bit Resolution

• Analog Performance:

– Dynamic Range: 123 dB

– THD+N: 0.0005%

• Differential Current Output: 3.9 mA PP

• 8× Oversampling Digital Filter:

– Stop-Band Attenuation: –98 dB

– Passband Ripple: ±0.0002 dB

• Sampling Frequency: 10 kHz to 200 kHz

• System Clock: 128, 192, 256, 384, 512,

or 768 fS With Autodetect

• Accepts 16-, 24-, and 32-Bit Audio Data

• PCM Data Formats: Standard, I2S, and Left-

Justified

• DSD Format Interface Available

• Interface Available for Optional External Digital

Filter or DSP

• TDMCA or Serial Port (SPI™/I2C)

• User-Programmable Mode Controls:

– Digital Attenuation:

0 dB to –120 dB, 0.5-dB/Step

– Digital De-Emphasis

– Digital Filter Roll-Off: Sharp or Slow

– Soft Mute

– Zero Flag for Each Output

• Compatible With PCM1792A and PCM1796

(Pins and Mode Controls)

• Dual Supply Operation:

– 5-V Analog, 3.3-V Digital

• 5-V Tolerant Digital Inputs

• Small SSOP-28 Package

2 Applications

• A/V Receivers

• SACD Players

• DVD Players

• HDTV Receivers

• Car Audio Systems

• Digital Multitrack Recorders

• Other Applications Requiring 32-Bit Audio

3 Description

The PCM1795 device is a monolithic CMOS

integrated circuit that includes stereo digital-to-analog converters (DACs) and support circuitry in a small

SSOP-28 package. The data converters use TI’s

advanced segment DAC architecture to achieve

excellent dynamic performance and improved

tolerance to clock jitter. The PCM1795 provides

balanced current outputs, letting the user optimize

analog performance externally. The PCM1795

accepts pulse code modulation (PCM) and direct

stream digital (DSD) audio data formats, thus

providing an easy interface to audio digital signal

processors (DSPs) and decoder chips. The PCM1795

device also interfaces with external digital filter

devices such as the DF1704, DF1706, and the

PMD200 from Pacific Microsonics™. Sampling rates

up to 200 kHz are supported. A full set of user-

programmable functions is accessible through an SPI

or I2C serial control port that supports register write

and readback functions. The PCM1795 device also

supports the time-division-multiplexed (TDM) command and audio (TDMCA) data format.