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PDF PCM1719 Data sheet ( Hoja de datos )

Número de pieza PCM1719
Descripción Stereo Audio DIGITAL-TO-ANALOG CONVERTER
Fabricantes Burr-Brown Corporation 
Logotipo Burr-Brown Corporation Logotipo



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No Preview Available ! PCM1719 Hoja de datos, Descripción, Manual

® 49%
PCMF17P19OE
PCM1719
TM Stereo Audio
DIGITAL-TO-ANALOG CONVERTER
FEATURES
q ACCEPTS 16- OR 18-BIT INPUT DATA
q COMPLETE STEREO DAC:
8X Oversampling Digital Filter
Multi-Level Delta-Sigma DAC
Analog Low Pass Filter
q ON-CHIP HEADPHONE AMPLIFIER
q HIGH PERFORMANCE:
–88dB THD+N
96dB Dynamic Range
100dB SNR
q SELECTABLE FUNCTIONS:
Digital De-emphasis
Digital Attenuation (256 Steps)
Soft Mute
Multiple Output Formats
q SYSTEM CLOCK: 256fS or 384fS
q SINGLE +5V POWER SUPPLY
q SMALL 28-PIN SSOP PACKAGE
DESCRIPTION
PCM1719 is a complete, low cost stereo audio digital-
to-analog converter (DAC) including a digital interpo-
lation filter, 3rd-order delta-sigma DAC, an analog
low-pass filter and output amplifier. PCM1719 also
has an on-chip stereo headphone amplifier.
PCM1719 can accept either 16-, or 18-bit input data.
The audio data input format can be either MSB-first,
right-justified or I2S. The system clock can be 256fS or
384fS. PCM1719 is fabricated on a highly advanced
0.6µs CMOS process, which delivers high perfor-
mance at very low power dissipation.
PCM1719 is ideal for applications which require head-
phone drivers such as CD-ROM drives, digital audio
workstations, portable CD players, and digital musical
instruments.
BCKIN
LRCIN
DIN
ML
MC
MD
RSTB
XTI
XTO
CLKO
Serial
Input
I/F
Mode
Control
I/F
Reset
Clock
and
OSC
Manager
8X Oversampling
Digital Filter
with Multi-Function
Control
Multi-level
Delta-Sigma
Modulator
DAC
Multi-level
Delta-Sigma
Modulator
DAC
Low-pass
Filter
Low-pass
Filter
BPZ-Cont.
PCM1719
Power Supply
Open Drain
Headphone Amp
Mute
Headphone Amp
Bias
VOUTL
COM
VOUTR
ZERO
PINL
POUTL
PCOM
PMUTE
POUTR
PINLR
VCC AGND VDD DGND PGND PVCC
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
© 1996 Burr-Brown Corporation
PDS-1343A
Printed in U.S.A., November, 1996

1 page




PCM1719 pdf
TYPICAL PERFORMANCE CURVES
At TA = +25°C, VCC = VDD = PVCC = +5V, RL = 32+ 32Ω, and f = 1kHz, 384fS, unless otherwise noted.
ANALOG PERFORMANCE
0.05
0.04
0.03
0.02
0.01
0
–25
TOTAL THD+N vs TEMPERATURE
–60dB
2.5
2.0
1.5
1.0
0dB
0.5
0
0 +25 +50 +75 +85 +100
Temperature (°C)
0.05
0.04
0.03
0.02
0.01
0
4.0
TOTAL THD+N vs SUPPLY VOLTAGE
–60dB
0dB
4.5 5.0 5.5
Supply Voltage (VCC)
2.5
2.0
1.5
1.0
0.5
0
6.0
TOTAL THD+N vs INPUT LEVEL
10
1
0.1
0dB = FS
0.01
0.001
–70 –60 –50 –40 –30 –20 –10 0
Input Level (dB)
INDIVIDUAL THD+N vs INPUT LEVEL
(Minimum Load)
10
1 DAC
0.1
0.01
Headphone Amp
0dB = FS
0.001
–70 –60 –50 –40 –30 –20 –10 0
Input Level (dB)
®
5 PCM1719

5 Page





PCM1719 arduino
10pF to 22pF
XTAL
10pF to 22pF
System Clock
(256fS/384fS)
PCM
Audio
Data
Processer
(DSP)
Function
Control
Processor
(MPU)
Reset
Mute
0.1µF to 10µF
Bypass Capacitor
2
DGND
28 XTO
3
VDD
CLKO 27
+5.0V
Analog Power
Supply
1 XTI
4 LRCIN
5 DIN
6 BCKIN
PCM1719
VCC 19
AGND 10
COM 21
ZERO 7
VOUTR 9
PINR 11
24 MD
25 MC
26 ML
PINL 18
VOUTL 20
PCOM 12
23 RSTB
POUTR 13
17 PMUTE
PVCC
15
POUTL 16
PAGND
14
VDD
0.1µF to 10µF Bypass Capacitor
10µF
+
4.7k
10µF
+
10µF
+
Post Low Pass
Filter(1)
10µF
+
10µF
+
100µF
+
Post Low Pass
Filter(1)
32
470µF
+
32
470µF
+
Line Out
10k
10k
Headphone Out
NOTE: (1) Either passive or active, depending on application.
0.1µF to 10µF
Bypass Capacitor
FIGURE 7. Typical Circuit Connection.
TYPICAL APPLICATION CIRCUIT
Figure 7 shows the typical application circuit. In this circuit,
VDD, VCC, and PVCC are connected to a common analog
power supply. It is possible to use separate analog and
digital power supplies for PCM1719. If separate supplies are
used, the difference voltage between the supplies must be
less than ±0.1V. PCM1719’s headphone amplifier allows for
high current flow from the outputs to ground. To keep the
high load current from affecting the DAC’s performance,
the headphone jack ground should be connected to a low-
impedance ground plane. Interference from the headphone
amplifier can also be minimized by using a separate power
supply for PVCC, but avoid power supply deltas greater than
±0.1V.
Bypassing and decoupling capacitors should be placed as
close as possible to the device pin. The capacitance be-
tween PCOM (pin 12) and/or COM (pin 21) to ground can
be reduced to 1µF, but this may decrease performance of
the PCM1719’s internal analog low-pass filter. The 10µF
capacitor shown between COM and analog ground is used
to set the pole for the PCM1719’s internal low-pass filter.
It is also important to limit the measurement bandwidth of
the PCM1719 to 20kHz during performance evaluation. By
definition, delta-sigma DACs have a large amount of en-
ergy beyond the audio band. Including this energy in
THD+N measurements will not demonstrate the true in-
band performance of PCM1719.
®
11 PCM1719

11 Page







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