FEATURES

24-Bit Resolution

Analog Performance:

− Dynamic Range: 123 dB

− THD+N: 0.0005%

Differential Current Output: 4 mA p-p

8× Oversampling Digital Filter:

− Stop-Band Attenuation: –98 dB

− Pass-Band 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-, 20-, and 24-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 Rolloff: Sharp or Slow

− Soft Mute

− Zero Flag for Each Output

Compatible With PCM1792 (Pins and Mode

Controls)

Dual Supply Operation:

− 5-V Analog, 3.3-V Digital

5-V Tolerant Digital Inputs

Small 28-Lead SSOP Package

APPLICATIONS

A/V Receivers

SACD Players

DVD Players

HDTV Receivers

Car Audio Systems

Digital Multitrack Recorders

Other Applications Requiring 24-Bit Audio

DESCRIPTION

The PCM1796 is a monolithic CMOS integrated circuit that

includes stereo digital-to-analog converters and support

circuitry in a small 28-lead SSOP package. The data

converters use TI’s advanced segment DAC architecture

to achieve excellent dynamic performance and improved

tolerance to clock jitter. The PCM1796 provides balanced

current outputs, allowing the user to optimize analog

performance externally. The PCM1796 accepts PCM and

DSD audio data formats, providing easy interfacing to

audio DSP and decoder chips. The PCM1796 also

interfaces with external digital filter devices (DF1704,

DF1706, PMD200). 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, which

supports register write and readback functions. The

PCM1796 also supports the time division multiplexed

command and audio (TDMCA) data format.