PCM1690 113dB SNR 8-Channel Audio DAC with Differential Outputs | TI.com

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

 

Description

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.

For all available packages, see the orderable addendum at the end of the data sheet.

Features

  • 24-Bit Delta-Sigma DAC
  • 8-Channel DAC:
    • High Performance: Differential, fS = 48 kHz
    • THD+N: –94 dB
    • SNR: 113 dB
    • Dynamic Range: 113 dB
    • Sampling Rate: 8 kHz to 192 kHz
    • System Clock: 128 fS, 192 fS, 256 fS, 384 fS,
      512 fS, 768 fS, 1152 fS
    • Differential Voltage Output: 8 VPP
    • 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

Parametrics

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Part number Order DAC channels Analog inputs Analog outputs DAC SNR (Typ) (dB) Sampling rate (Max) (kHz) Control interface Resolution (Bits) Architecture Package size: mm2:W x L (PKG) Approx. price (US$)
PCM1690 Order now 8     0     8     113     192     SPI
I2C
H/W    
24     Current Segment DAC     48HTSSOP: 101 mm2: 8.1 x 12.5 (HTSSOP | 48)     2.35 | 1ku    
PCM1680 Samples not available 8     0     8     105     192     SPI
I2C    
24     Delta-Sigma     28SSOP: 59 mm2: 6 x 9.9 (SSOP | 28)     1.99 | 1ku    
PCM1681 Order now 8     0     8     105     200     SPI
I2C
H/W    
24     Current Segment DAC     28HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 28)     1.40 | 1ku