PCM2702

16-Bit Stereo DIGITAL-TO-ANALOG CONVERTER with Interface

FEATURES

● INTEGRATED USB INTERFACE:

Full-Speed Transceiver Supports 12Mbps Data Transfer.

Fully Compliant with the USB 1.0 Specification.

Adaptive Mode for Isochronous Transfer.

Self-Powered Device.

● ACCEPTS 16-BIT STEREO AND MONO USB AUDIO DATA STREAMS.

● ANALOG PERFORMANCE (VCC = 5V):

Dynamic Range: 100dB (typ at 16-bit)

SNR: 105dB (typ)

THD+N: 0.002% (typ at 16-bit)

Full-Scale Output: 3.1Vp-p

● 8X OVERSAMPLING DIGITAL FILTER:

Passband: 0.454fS

Stopband: 0.546fS

Passband Ripple: ±0.002dB

Stopband Attenuation: –82dB

● SAMPLING RATE (F_S): 32kHz, 44.1kHz, 48kHz

● ON-CHIP CLOCK GENERATOR WITH SINGLE 12MHz CLOCK SOURCE

● MULTI-FUNCTIONS:

Digital Attenuator: 0dB to –64dB, 1dB/step

Soft Mute

Zero Flag

Suspend Flag

Playback Flag

● DUAL POWER SUPPLIES:

+5V for Analog portion

+3.3V for Digital portion

● PACKAGE: SSOP-28

APPLICATIONS

● STAND-ALONE USB AUDIO SPEAKERS

● CRT/LCD INTEGRATED USB AUDIO SPEAKERS

● USB AUDIO AMPLIFIERS

● OTHER USB AUDIO APPLICATIONS

DESCRIPTION

The PCM2702 is a single chip digital-to-analog converter offering two D/A output channels and an integrated USB 1.0 compliant interface controller. The newly developed SpAct™ (Sampling Period Adaptive Controlled Tracking) system recovers a stable, lowjitter clock for internal PLL and DAC operation from the USB interface audio data.

The PCM2702 is based upon Burr-Brown’s Enhanced Multi-level Delta-Sigma Modulator, an 8x oversampling digital interpolation filter, and an analog output low-pass filter.

The PCM2702 can accept a 48kHz, 44.1kHz and 32kHz sampling rates, using either 16-bit stereo or monaural audio data. Digital attenuation and softmute features are included, and are controlled via USB audio class request.

ABSOLUTE MAXIMUM RATINGS⁽¹⁾

Supply Voltage⁽²⁾ ................................................................................................ +6.5V

Supply Voltage⁽³⁾ ................................................................................................. +4.0V

Supply Voltage Differences⁽⁴⁾ .............................................................................. ±0.1V

Supply Voltage Differences⁽⁵⁾ .............................................................................. ±0.1V

Ground Voltage Differences⁽⁶⁾ ............................................................................. ±0.1V

Digital Input Voltage⁽⁷⁾ .................................................................. –0.3V to V_DD + 0.3V

Digital Input Voltage⁽⁸⁾ ............................................................................ –0.3V to 6.5V

Analog Input Voltage .................................................................... –0.3V to V_CC + 0.3V

Input Current (any pins except supplies) ........................................................... ±10mA

Operating Temperature ....................................................................... –25°C to +85°C

Storage Temperature ........................................................................ –55°C to +125°C

Junction Temperature ....................................................................................... +150°C

Lead Temperature (soldering, 5s) .................................................................... +260°C

Package Temperature (IR reflow, peak, 10s) .................................................... +235°C

NOTES:

(1) Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to absolute maximum conditions for extended periods may affect device reliability.

(2) VCC, VCCL, VCCR, VDDP.

(3) VDD, VDDC.

(4) Among VCC, VCCL, VCCR, VCCP.

(5) Among VDD, VDDC.

(6) Among AGND, AGNDL, AGNDR, AGNDP, DGND, DGNDC, and DGNDU.

(7) XTI, D+, D–, PLYBCK, SSPND, ZERO, XTO.

(8) VBUS, TEST#, TEST2, TEST1, TEST0.

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