PCM1789 - 113dB SNR Stereo DAC

The PCM1789 is a high-performance, single-chip, 24-bit, stereo, audio digital-to-analog converter (DAC) with differential outputs. The two-channel, 24-bit DAC employs an enhanced multi-level, delta-sigma (ΔΣ) modulator, and supports 8 kHz to 192 kHz sampling rates and a 16-, 20-, 24-, 32-bit width digital audio input word on the audio interface. The audio interface of PCM1789 supports a 24-bit, DSP format in addition to I²S, left-justified, and right-justified formats.

The PCM1789 can be controlled through a three-wire, SPI-compatible or two-wire, I²C-compatible serial interface in software, which provides access to all functions including digital attenuation, soft mute, de-emphasis, and so forth. Also, hardware control mode provides two user-programmable functions through two control pins. The PCM1789 is available in a 24-pin TSSOP package.

• Enhanced Multi-Level Delta-Sigma DAC:
  • High Performance: Differential, f_S = 48 kHz
  • THD+N: –94 dB
  • SNR: 113 dB
  • Dynamic Range: 113 dB
  • Sampling Rate: 8 kHz to 192 kHz
  • System Clock: 128 f_S, 192 f_S, 256 f_S, 384 f_S,
    512 f_S, 768 f_S, 1152 f_S
  • Differential Voltage Output: 8 V_PP
  • Analog Low-Pass Filter Included
  • 4x/8x Oversampling Digital Filter:
    • Passband Ripple: ±0.0018 dB
    • Stop Band Attenuation: –75 dB
  • Zero Flags (16-, 20-, 24-Bits)
• Flexible Audio Interface:
  • I/F Format: I²S, Left-/Right-Justified, DSP
  • Data Length: 16, 20, 24, 32 Bits
• Flexible Mode Control:
  • 3-Wire SPI, 2-Wire I²C-Compatible Serial
    Control Interface, or Hardware Control
  • Connect Up To 4 Devices on One SPI Bus
• Multi Functions via SPI or I²C I/F:
  • Audio I/F Format Select: I²S, Left-Justified,
    Right-Justified, DSP
  • Digital Attenuation and Soft Mute
  • Digital De-Emphasis: 32kHz, 44.1kHz, 48kHz
  • Data Polarity Control
  • Power-Save Mode
• Multi Functions via Hardware Control:
  • Audio I/F Format Select: I²S, Left-Justified
  • Digital De-Emphasis Filter: 44.1kHz
• Analog Mute by Clock Halt Detection
• External Reset Pin
• Power Supplies:
  • 5 V for Analog and 3.3 V for Digital
• Package: TSSOP-24
• Operating Temperature Range: –40°C to 85°C