PCM1690 - 113dB SNR 8-Channel Audio DAC with Differential Outputs

The PCM1690 device is a high-performance, single-chip, 24-bit, eight-channel, audio digital-to-analog converter (DAC) with differential outputs. The eight-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 the PCM1690 supports the time-division-multiplexed (TDM) format in addition to the standard I²S, left-justified, right-justified, and DSP formats.

The PCM1690 can be controlled through a three-wire, SPI-compatible interface, 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 a subset of user-programmable functions through two control pins. The PCM1690 is available in a 12-mm × 8-mm (12-mm × 6-mm body) HTSSOP-48 package.

• 24-Bit Delta-Sigma DAC
• 8-Channel 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 Lowpass Filter Included
  • 4x/8x Oversampling Digital Filter:
    • Passband Ripple: ±0.0018 dB
    • Stop Band Attenuation: –75 dB
  • Zero Flag
• Flexible Audio Interface:
  • I/F Format: I²S™, Left-/Right-Justified, DSP,
    TDM
  • Data Length: 16, 20, 24, 32 Bits
• Flexible Mode Control:
  • 3-Wire SPI, 2-Wire I²C-Compatible Serial
    Control Interface, or Hardware Control
• Multiple Functions Through SPI or I²C I/F:
  • Audio I/F Format Select: I²S, Left-Justified,
    Right-Justified, DSP, TDM
  • Digital Attenuation and Soft Mute
  • Digital De-Emphasis: 32 kHz, 44.1 kHz,
    48 kHz
  • Data Polarity Control
  • Power Down
• Multiple Functions Through H/W Control:
  • Audio I/F Format Select: I²S, TDM
  • Digital De-Emphasis Filter: 44.1 kHz
• Analog Mute by Clock Halt Detection
• External RESET Pin
• Power Supplies:
  • 5 V for Analog and 3.3 V for Digital
• Package: HTSSOP-48
• Operating Temperature Range:
  • –40°C to +85°C