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PDF PCM1739 Data sheet ( Hoja de datos )
| Número de pieza | PCM1739 | |
| Descripción | 24-Bit/ 192kHz Sampling/ Enhanced Multi-Level/ Delta-Sigma/ Audio DIGITAL-TO-ANALOG CONVERTER | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
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49%
FPOPCM1739
PCM1739
For most current data sheet and other product
information, visit www.burr-brown.com
TM 24-Bit, 192kHz Sampling,
Enhanced Multi-Level, Delta-Sigma, Audio
DIGITAL-TO-ANALOG CONVERTER
FEATURES
q 24-BIT RESOLUTION
q ANALOG PERFORMANCE (VCC = +5V):
Dynamic Range: 106dB typ
SNR: 105dB typ
THD+N: 0.0015% typ
Full-Scale Output: 3.1Vp-p typ
q 4x/8x OVERSAMPLING DIGITAL FILTER:
Passband: 0.454fS
Stopband: 0.546fS
Stopband Attenuation: –82dB
Passband Ripple: ±0.002dB
q SAMPLING FREQUENCY: 10kHz to 192kHz
q SYSTEM CLOCK: 128fS, 192fS, 256fS, 384fS,
512fS, or 768fS with Auto Detect
q ACCEPTS 24- or 16-BIT AUDIO DATA
q DATA FORMATS: Standard, I2S
q MODE CONTROLS
Digital De-Emphasis
Soft Mute
Zero Flags for Each Output
q DUAL SUPPLY OPERATION:
+5V Analog, +3.3V Digital
q 5V TOLERANT DIGITAL INPUTS
q SMALL SSOP-28 PACKAGE
APPLICATIONS
q A/V RECEIVERS
q DVD AUDIO AND MOVIE PLAYERS
q DVD ADD-ON CARDS FOR ENTERTAINMENT
PCs
q HDTV RECEIVERS
q CAR AUDIO SYSTEMS
q OTHER APPLICATIONS REQUIRING
24-BIT AUDIO
DESCRIPTION
The PCM1739 is a CMOS, monolithic, integrated
circuit which includes stereo 24-bit audio digital-to-
analog converters and support circuitry in a small
SSOP-28 package. The data converters utilize Burr-
Brown’s enhanced multi-level delta-sigma architec-
ture, which employs 4th-order noise shaping and
8-level amplitude quantization to achieve excellent
dynamic performance and improved tolerance to clock
jitter. The PCM1739 accepts industry-standard audio
data formats with 16- or 24-bit data, providing easy
interfacing to audio DSP and decoder chips. Sampling
rates up to 192kHz are supported.
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/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
© 1999 Burr-Brown Corporation
PDS-1560C
Printed in U.S.A. March, 2000
1 page  
TYPICAL PERFORMANCE CURVES
All specifications at TA = +25°C, VDD = VCC = 5V, SYSCLK = 384fS (fS = 44.1kHz), and 20-bit input data, unless otherwise noted.
DIGITAL FILTER
Digital Filter (De-Emphasis Off, fS = 44.1kHz)
FREQUENCY RESPONSE
0
0.003
PASSBAND RIPPLE
–20 0.002
–40
0.001
–60
–80 0
–100
–120
–140
–160
0 0.5 1 1.5 2 2.5 3 3.5 4
Frequency (x fS)
–0.001
–0.002
–0.003
0
0.1 0.2
0.3
Frequency (x fS)
0.4
0.5
DIGITAL FILTER
De-Emphasis Error
DE-EMPHASIS FREQUENCY RESPONSE (fS = 32kHz)
0
–2
–4
–6
–8
–10
0 2 4 6 8 10 12 14
Frequency (kHz)
DE-EMPHASIS FREQUENCY RESPONSE (fS = 44.1kHz)
0
–2
–4
–6
–8
–10
0 2 4 6 8 10 12 14 16 18 20
Frequency (kHz)
DE-EMPHASIS FREQUENCY RESPONSE (fS = 48kHz)
0
–2
–4
–6
–8
–10
0 2 4 6 8 10 12 14 16 18 20 22
Frequency (kHz)
0.5
0.3
0.1
–0.1
–0.3
–0.5
0
DE-EMPHASIS ERROR (fS = 32kHz)
2 4 6 8 10 12 14
Frequency (kHz)
0.5
0.3
0.1
–0.1
–0.3
–0.5
0
DE-EMPHASIS ERROR (fS = 44.1kHz)
2 4 6 8 10 12 14 16 18 20
Frequency (kHz)
DE-EMPHASIS ERR0R (fS = 48kHz)
0.5
0.3
0.1
–0.1
–0.3
–0.5
0 2 4 6 8 10 12 14 16 18 20 22
Frequency (kHz)
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5 PCM1739
5 Page 
LRCK
BCLK
DATA
tBCH
tBCL
tBCY
tDS
tBL
tDH
tLB
50% of VDD
50% of VDD
50% of VDD
SYMBOL
PARAMETER
tBCY BCK Pulse Cycle Time
tBCH BCK High Level Time
tBCL BCK Low Level Time
tBL BCK Rising Edge to LRCK Edge
tLB LRCK Falling Edge to BCK Rising Edge
tDS DIN Set Up Time
tDH DIN Hold Time
NOTE: (1) fS is the sampling frequency.
FIGURE 5. Audio Interface Timing.
MIN
MAX
UNITS
48 or 64fS(1)
35 ns
35 ns
10 ns
10 ns
10 ns
10 ns
4x/8x DIGITAL INTERPOLATION
The PCM1739’s digital filter may be configured for either
4x or 8x oversampling. The 8x oversampling setting is
utilized for sampling frequencies up to 96kHz, while 4x
oversampling is utilized for 192kHz operation. The FILT
input (pin 20) is used to select the oversampling rate of the
digital filter. Table IV shows the FILT pin configuration.
FILT
OVERSAMPLING RATE
L 8x
H 4x ( Required for 192kHz operation)
TABLE IV. Digital Filter Oversampling Rate Selection.
SOFT MUTE
The Soft Mute function provides for quiet muting of the
DAC outputs, VOUTL (pin 16) and VOUTR (pin 13). This is
done by ramping an internal digital attenuator from unity
gain to digital mute (all 0’s input to the digital filter). The
MUTE input (pin 21) is used to enable and disable the Soft
Mute function. Table V shows the MUTE pin configuration.
MUTE
L
H
SOFT MUTE STATUS
Disabled
Enabled
TABLE V. Soft Mute Selection.
DIGITAL DE-EMPHASIS
The PCM1739 provides a De-emphasis function for sam-
pling rates equal to 32kHz, 44.1kHz or 48kHz. It is incorpo-
rated into the digital filter of the PCM1739. The De-empha-
sis function is required for proper playback of early audio
compact disks (CDs), which were mastered with signal
emphasis for higher frequencies in the audio band. This was
done to improve the poor high frequency performance of
early CD players. Plots of the de-emphasis filter and error
functions for 32kHz, 44.1kHz, and 48kHz are shown in the
Typical Performance Curves section of this data sheet.
The DEM0 (pin 26) and DEM1 (pin 27) inputs of the
PCM1739 are used to enable and disable the digital de-
emphasis function. Table VI shows the DEM0 and DEM1
pin configurations.
DEM1
DEM0
DE-EMPHASIS FUNCTION
LL
LH
HL
HH
OFF
32kHz De-Emphasis Filter
44.1kHz De-Emphasis Filter
48kHz De-Emphasis Filter
TABLE VI. Digital De-Emphasis.
ANALOG OUTPUTS
The PCM1739 includes two independent output channels;
VOUTL (pin 16) and VOUTR (pin 13). These are unbalanced
outputs, each capable of driving 3.1Vp-p typical into a 5kΩ,
AC-coupled load (VCC = +5V). The internal output ampli-
fiers for VOUTL and VOUTR are DC biased to a DC common-
mode (or bipolar zero) voltage, equal to VCC/2.
The output amplifiers include an RC continuous time filter,
which helps to reduce the out-of-band noise energy present
at the DAC outputs due to the noise shaping characteristics
of the PCM1739’s delta-sigma D/A converters. The fre-
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11 PCM1739
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet PCM1739.PDF ] | |
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