Product
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PCM2705
  • PCM2705

PCM2705

ACTIVE

98dB SNR Stereo USB2.0 FS DAC with line-out and S/PDIF output, Bus/Self-powered (S/W Control)

Texas Instruments PCM2705 Product Info

1 April 2026 3

Parameters

Number of DAC channels

0

Sampling rate (min) (kHz)

32

Sampling rate (max) (kHz)

48

THD+N (dB)

-84

Control interface

HID, SPI

Resolution (Bits)

16

DAC SNR (typ) (dB)

0

Analog outputs

2

Architecture

USB 1.1

Operating temperature range (°C)

-25 to 85

Rating

Catalog

Package

SSOP (DB)-28-79.56 mm² 10.2 x 7.8

Features

  • On-Chip USB Interface:
    • No Need of Dedicated Device Driver
    • With Full-Speed Transceivers
    • Fully Compliant With USB 1.1 Specification
    • Certified by USB-IF
    • Partially Programmable Descriptors
    • Adaptive Isochronous Transfer for Playback
    • Bus-Powered or Self-Powered Operation
  • Sampling Rate: 32, 44.1, 48 kHz
  • On-Chip Clock Generator With Single 12-MHz Clock Source
  • Single Power Supply:
    • Bus-Powered: 5 V, Typical (VBUS)
    • Self-Powered: 3.3 V, Typical
  • 16-Bit Delta-Sigma Stereo DAC
    • Analog Performance at 5 V (Bus-Powered),
      3.3 V (Self-Powered): THD+N: 0.006% RL > 10 kΩ, Self-Powered THD+N: 0.025% RL = 32 Ω SNR = 98 dB Dynamic Range: 98 dB PO = 12 mW, RL = 32 Ω
    • Oversampling Digital Filter Pass-Band Ripple = ±0.04 dBStop-Band Attenuation = -50 dB
    • Single-Ended Voltage Output
    • Analog LPF Included
  • Multiple Functions:
    • Up to Eight Human Interface Device (HID) Interfaces (Depending on Model and Settings)
    • Suspend Flag
    • S/PDIF Out With SCMS
    • External ROM Interface (PCM2704/6)
    • Serial Programming Interface (PCM2705/7)
    • I2S Interface (Selectable on PCM2706/7)
  • Package:
  • On-Chip USB Interface:
    • No Need of Dedicated Device Driver
    • With Full-Speed Transceivers
    • Fully Compliant With USB 1.1 Specification
    • Certified by USB-IF
    • Partially Programmable Descriptors
    • Adaptive Isochronous Transfer for Playback
    • Bus-Powered or Self-Powered Operation
  • Sampling Rate: 32, 44.1, 48 kHz
  • On-Chip Clock Generator With Single 12-MHz Clock Source
  • Single Power Supply:
    • Bus-Powered: 5 V, Typical (VBUS)
    • Self-Powered: 3.3 V, Typical
  • 16-Bit Delta-Sigma Stereo DAC
    • Analog Performance at 5 V (Bus-Powered),
      3.3 V (Self-Powered): THD+N: 0.006% RL > 10 kΩ, Self-Powered THD+N: 0.025% RL = 32 Ω SNR = 98 dB Dynamic Range: 98 dB PO = 12 mW, RL = 32 Ω
    • Oversampling Digital Filter Pass-Band Ripple = ±0.04 dBStop-Band Attenuation = -50 dB
    • Single-Ended Voltage Output
    • Analog LPF Included
  • Multiple Functions:
    • Up to Eight Human Interface Device (HID) Interfaces (Depending on Model and Settings)
    • Suspend Flag
    • S/PDIF Out With SCMS
    • External ROM Interface (PCM2704/6)
    • Serial Programming Interface (PCM2705/7)
    • I2S Interface (Selectable on PCM2706/7)
  • Package:

Description

The PCM2704/5/6/7 is TI's single-chip USB stereo audio DAC with USB-compliant full-speed protocol controller and S/PDIF. The USB-protocol controller works with no software code, but USB descriptors can be modified in some parts (for example, vendor ID/product ID) through the use of an external ROM (PCM2704/6), SPI (PCM2705/7), or on request. The modification of the USB descriptor through external ROM or SPI must comply with USB-IF guidelines, and the vendor ID must be your own ID as assigned by the USB-IF. The descriptor also can be modified by changing a mask; contact your representative for details. The PCM2704/5/6/7 employs SpAct architecture, TI's unique system that recovers the audio clock from USB packet data. On-chip analog PLLs with SpAct enable playback with low clock jitter.

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