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PDF PCM1725U Data sheet ( Hoja de datos )

Número de pieza PCM1725U
Descripción Stereo Audio DIGITAL-TO-ANALOG CONVERTER 16 Bits/ 96kHz Sampling
Fabricantes Burr-Brown Corporation 
Logotipo Burr-Brown Corporation Logotipo



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®
PCM1725
PCM1725
TM Stereo Audio
DIGITAL-TO-ANALOG CONVERTER
16 Bits, 96kHz Sampling
FEATURES
q COMPLETE STEREO DAC: Includes Digital
Filter and Output Amp
q DYNAMIC RANGE: 95dB
q MULTIPLE SAMPLING FREQUENCIES:
16kHz to 96kHz
q 8X OVERSAMPLING DIGITAL FILTER
q SYSTEM CLOCK: 256fS / 384fS
q NORMAL OR I2S DATA INPUT FORMATS
q SMALL 14-PIN SOIC PACKAGE
DESCRIPTION
The PCM1725 is a complete low cost stereo audio
digital-to-analog converter (DAC), operating off of a
256fS or 384fS system clock. The DAC contains a 3rd-
order ∆Σ modulator, a digital interpolation filter, and
an analog output amplifier. The PCM1725 accepts
16-bit input data in either normal or I2S formats.
The digital filter performs an 8X interpolation function
and includes de-emphasis at 44.1kHz. The PCM1725
can accept digital audio sampling frequencies from
16kHz to 96kHz, always at 8X oversampling.
The PCM1725 is ideal for low-cost, CD-quality con-
sumer audio applications.
BCKIN
LRCIN
DIN
Serial
Input
I/F
FORMAT
DM
Mode
Control
I/F
8X Oversampling
Digital Filter
Multi-level
Delta-Sigma
Modulator
DAC
Multi-level
Delta-Sigma
Modulator
DAC
Low-pass
Filter
Low-pass
Filter
256fS/384fS
Power Supply
VOUTL
CAP
VOUTR
SCKI
VCC GND
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
© 1997 Burr-Brown Corporation
PDS-11373C
PPrCinteMd i1n U7.S2.A5. January, 1998
®

1 page




PCM1725U pdf
TYPICAL PERFORMANCE CURVES
At TA = +25°C, +VCC = +VDD = +5V, fS = 44.1kHz, and 16-bit input data, SYSCLK = 384fS, unless otherwise noted.
DIGITAL FILTER
OVERALL FREQUENCY CHARACTERISTIC
0
–20
–40
–60
–80
–100
0 0.4536fS
1.3605fS 2.2675fS
Frequency (Hz)
3.1745fS
4.0815fS
0
–0.2
–0.4
–0.6
–0.8
–1
0
PASSBAND RIPPLE CHARACTERISTIC
0.1134fS
0.2268fS
0.3402fS
Frequency (Hz)
0.4535fS
DE-EMPHASIS FREQUENCY RESPONSE (44.1kHz)
0
–2
–4
–6
–8
–10
–12
0
5 10 15 20 25
Frequency (kHz)
DE-EMPHASIS FREQUENCY ERROR (44.1kHz)
0.6
0.4
0.2
0.0
–0.2
–0.4
–0.6
0
4999.8375 9999.675 14999.5125
Frequency (kHz)
19999.35
®
5 PCM1725

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