PCM2705C

Name: PCM2705C
Brand: TI
SKU: PCM2705C
Price: 4.466 USD

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98dB SNR Stereo Full Speed DAC with line-out and S/PDIF output, Bus/Self-powered (S/W Control)

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Data sheet

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PCM270xC Stereo Audio DAC With USB Interface, Single-Ended Headphone Output and S/PDIF Output datasheet (Rev. B)

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Online data sheet

98dB SNR Stereo Full Speed DAC with line-out and S/PDIF output, Bus/Self-powered (S/W Control)

PCM2705C

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Data sheet

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Product details

Number of DAC channels (#)

0

Analog inputs

0

Analog outputs

2

DAC SNR (Typ) (dB)

0

Sampling rate (Max) (kHz)

48

Control interface

HID, SPI

Resolution (Bits)

16

Architecture

USB 1.1

Number of DAC channels (#)

0

Analog inputs

0

Analog outputs

2

DAC SNR (Typ) (dB)

0

Sampling rate (Max) (kHz)

48

Control interface

HID, SPI

Resolution (Bits)

16

Architecture

USB 1.1

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SSOP (DB)

28

54 mm² 10.5 x 5.3

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On-Chip USB Interface:
- No Dedicated Device Driver Needed
- Full-Speed Transceivers
- Fully Compliant With USB 2.0 Specification
  - USB 1.1 Descriptors With USB Audio
    Class Support
- Certified by USB-IF
- Partially Programmable Descriptors
- Adaptive Isochronous Transfer for Playback
- Bus-Powered or Self-Powered Operation
Sampling Rates: 32 kHz, 44.1 kHz, and 48 kHz
On-Chip Clock Generator With Single 12-MHz
Clock Source
Single Power Supply:
- Bus-Powered: 5 V, Typical (V_BUS)
- 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% R_L > 10 kΩ, Self-
    Powered
  - THD + N: 0.025% R_L = 32 Ω
  - SNR = 98 dB
  - Dynamic Range: 98 dB
  - P_O = 12 mW, R_L = 32 Ω
- Oversampling Digital Filter
  - Passband Ripple = ±0.04 dB
  - Stop-Band Attenuation = –50 dB
- Single-Ended Voltage Output
- Analog LPF Included
Multiple Functions:
- Up to Eight Human Interface Device (HID)
  Interfaces (Model and Setting Dependent)
- Suspend Flag
- S/PDIF Out With SCMS
- External ROM Interface (PCM2704C/6C)
- Serial Programming Interface (PCM2705C/7C)
- I²S Interface (Selectable on PCM2706C/7C)

On-Chip USB Interface:
- No Dedicated Device Driver Needed
- Full-Speed Transceivers
- Fully Compliant With USB 2.0 Specification
  - USB 1.1 Descriptors With USB Audio
    Class Support
- Certified by USB-IF
- Partially Programmable Descriptors
- Adaptive Isochronous Transfer for Playback
- Bus-Powered or Self-Powered Operation
Sampling Rates: 32 kHz, 44.1 kHz, and 48 kHz
On-Chip Clock Generator With Single 12-MHz
Clock Source
Single Power Supply:
- Bus-Powered: 5 V, Typical (V_BUS)
- 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% R_L > 10 kΩ, Self-
    Powered
  - THD + N: 0.025% R_L = 32 Ω
  - SNR = 98 dB
  - Dynamic Range: 98 dB
  - P_O = 12 mW, R_L = 32 Ω
- Oversampling Digital Filter
  - Passband Ripple = ±0.04 dB
  - Stop-Band Attenuation = –50 dB
- Single-Ended Voltage Output
- Analog LPF Included
Multiple Functions:
- Up to Eight Human Interface Device (HID)
  Interfaces (Model and Setting Dependent)
- Suspend Flag
- S/PDIF Out With SCMS
- External ROM Interface (PCM2704C/6C)
- Serial Programming Interface (PCM2705C/7C)
- I²S Interface (Selectable on PCM2706C/7C)

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The PCM270xC are TI’s single-chip USB stereo audio digital-to-analog converters (DACs) with USB 2.0 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 areas (for example, vendor ID/product ID) through the use of an external ROM (PCM2704C and PCM2706C) or serial peripheral interface (SPI) (PCM2705C and PCM2707C). The PCM270xC also employ SpAct architecture, TI's unique system that recovers the audio clock from USB packet data. On-chip analog phase-locked loops (PLLs) with SpAct enable playback with low clock jitter.

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Technical documentation

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	Type	Title	Date
*	Data sheet	PCM270xC Stereo Audio DAC With USB Interface, Single-Ended Headphone Output and S/PDIF Output datasheet (Rev. B)	25 Aug 2015
	Application note	Differences between PCM270x and PCM270xC	16 Aug 2011

Design & development

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Evaluation board

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SBFM011.ZIP (54 KB) - IBIS Model

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