Burr Brown PCM1728E, PCM1728E-2K Datasheet

24-Bit, 96kHz Sampling

CMOS Delta-Sigma Stereo Audio

DIGITAL-TO-ANALOG CONVERTER

49%
FPO

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PCM1728

®

TM

DESCRIPTION

The PCM1728 is designed for mid- to high-grade
digital audio applications which achieve 96kHz sam­pling rates with 24-bit audio data. PCM1728 uses a
newly developed, enhanced multi-level delta-sigma
modulator architecture that improves audio dynamic
performance and reduces jitter sensitivity in actual
applications. The internal digital filter operates at 8X
oversampling at a 96kHz sampling rate.

The PCM1728 has superior audio dynamic perfor­mance, 24-bit resolution, and 96kHz sampling, mak­ing it ideal for mid- to high-grade audio applications
such as CD, DVD, and musical instruments.

FEATURES

● ENHANCED MULTI-LEVEL DELTA-SIGMA DAC

● SAMPLING FREQUENCY (fS): 16kHz - 96kHz

● INPUT AUDIO DATA WORD:

16-, 20-, 24-Bit

● HIGH PERFORMANCE:

THD+N: –96dB
Dynamic Range: 106dB
SNR: 106dB
Analog Output Range: 0.62 x VCC (Vp-p)

● 8x OVERSAMPLING DIGITAL FILTER:

Stop Band Attenuation: –82dB
Passband Ripple: ±0.002dB

● MULTI FUNCTIONS:

Digital De-emphasis
Soft Mute
Zero Flag

● +5V SINGLE SUPPLY OPERATION

● SMALL 28-LEAD SSOP PACKAGE

© 1998 Burr-Brown Corporation PDS-1453A Printed in U.S.A. April, 1998

Serial

Input

I/F

Mode

Control

I/F

8X Oversampling

Digital Filter with

Function

Controller

Crystal/OSC

XTI

SCK

XTO CLKO V

CC1

AGND1 VDDDGND

Enhanced
Multi-level

Delta-Sigma

Modulator

V

OUT

L

V

CC2

L

V

CC2

R

AGND2L

AGND2L

EXTL

Open Drain

DAC

Low-pass

Filter

Low-pass

Filter

V

OUT

R

EXTR

ZERO

DAC

DM1

I

2

S

LRCIN

DIN

BCKIN

IW0

DM0

IW1

MUTE

RST

Power Supply

PCM1728

®

2

PCM1728

SPECIFICATIONS

All specifications at +25°C, +VCC = +V

DD

= +5V, fS = 44.1kHz, and 24-bit input data, SYSCLK = 384fS, unless otherwise noted.

PCM1728

PARAMETER CONDITIONS MIN TYP MAX UNITS
RESOLUTION 24 Bits

DATA FORMAT

Audio Data Interface Format Standard/I2S
Data Bit Length 16/20/24 Selectable
Audio Data Format MSB-First, Two’s Binary Comp
Sampling Frequency (f

S

) 16 96 kHz

System Clock Frequency

(1)

256/384/512/768f

S

DIGITAL INPUT/OUTPUT LOGIC LEVEL

Input Logic Level V

IH

2.0 V

V

IL

0.8 V

Output Logic Level (CLKO) V

OH

I

OH

= 2mA 4.5 V

V

OL

I

OL

= 4mA 0.5 V

CLKO PERFORMANCE

(2)

Output Rise Time 20 ~ 80% VDD, 10pF 5.5 ns
Output Fall Time 80 ~ 20% V

DD

, 10pF 4 ns

Output Duty Cycle 10pF Load 37 %

DYNAMIC PERFORMANCE

(3)

(24-Bit Data)

THD+N V

O

= 0dB fS = 44.1kHz –97 –90 dB

fS = 96kHz –94 dB

V

O

= –60dB fS = 44.1kHz –42 dB

Dynamic Range f

S

=44.1kHz EIAJ A-weighted 98 106 dB

f

S

= 96kHz A-weighted 103 dB

Signal-to-Noise Ratio f

S

=44.1kHz EIAJ A-weighted 98 106 dB

f

S

= 96kHz A-weighted 103 dB

Channel Separation fS = 44.1kHz 96 102 dB

f

S

= 96kHz 101 dB

DYNAMIC PERFORMANCE

(3)

(16-Bit Data)

THD+N V

O

= 0dB fS = 44.1kHz –94 dB

f

S

= 96kHz –92 dB

Dynamic Range f

S

= 44.1kHz EIAJ A-weighted 98 dB

fS = 96kHz A-weighted 97 dB

DC ACCURACY

Gain Error ±1.0 ±3.0 % of FSR
Gain Mismatch: Channel-to-Channel ±1.0 ±3.0 % of FSR
Bipolar Zero Error V

O

= 0.5VCC at Bipolar Zero ±30 ±60 mV

ANALOG OUTPUT

Output Voltage Full Scale (0dB) 0.62 V

CC

Vp-p

Center Voltage 0.5 V

CC

V

Load Impedance AC Load 5 kΩ

DIGITAL FILTER PERFORMANCE

Filter Characteristics
Passband ±0.002dB 0.454f

S

–3dB 0.490f

S

Stopband 0.546f

S

Passband Ripple ±0.002 dB
Stopband Attenuation Stop Band = 0.546f

S

–75 dB

Stop Band = 0.567f

S

–82 dB

Delay Time 30/f

S

sec

De-emphasis Error ±0.1 dB

INTERNAL ANALOG FILTER

–3dB Bandwidth 100 kHz
Passband Response f = 20kHz –0.16 dB

POWER SUPPLY REQUIREMENTS

Voltage Range V

DD, VCC

4.5 5 5.5 VDC

Supply Current: I

CC +IDD

fS = 44.1kHz 32 45 mA

f

S

= 96kHz 45 mA

Power Dissipation f

S

= 44.1kHz 160 225 mW

f

S

= 96kHz 225 mW

TEMPERATURE RANGE

Operation –25 +85 °C
Storage –55 +100 °C

NOTES: (1) Refer section of system clock. (2) External buffer is recommended. (3) Dynamic performance specs are tested with 20kHz low pass filter and THD+N
specs are tested with 30kHz LPF, 400Hz HPF, Average Mode.

®

3 PCM1728

PIN NAME I/O DESCRIPTION

1 LRCIN IN Left and Right Clock Input. This clock is equal to

the sampling rate - fS.

(1)

2 DIN IN Serial Audio Data Input

(1)

3 BCKIN IN Bit Clock Input for Serial Audio Data.

(1)

4 CLKO OUT Buffered Output of Oscillator. Equivalent to

System Clock.
5 XTI IN Oscillator Input (External Clock Input)
6 XTO OUT Oscillator Output
7 DGND — Digital Ground
8V

DD

— Digital Power +5V

9V

CC

2R — Analog Power +5V
10 AGND2R — Analog Ground
11 EXTR OUT Rch, Common Pin of Analog Output Amp
12 NC — No Connection
13 V

OUT

R OUT Rch, Analog Voltage Output of Audio Signal
14 AGND1 — Analog Ground
15 V

CC

1 — Analog Power +5V

16 V

OUT

L OUT Lch, Analog Voltage Output of Audio Signal
17 NC — No Connection
18 EXTL OUT Lch, Common Pin of Analog Output Amp
19 AGND2L — Analog Ground
20 V

CC

2L — Analog Power +5V
21 ZERO OUT Zero Data Flag
22 RST IN Reset. When this pin is LOW, the DF and

modulators are held in reset.

(2)

23 IW0 IN Input Format Selection

(3)

24 IW1 IN Input Format Selection

(3)

25 MUTE IN Mute Control
26 DM0 IN De-emphasis Selection 1

(2)

27 DM1 IN De-emphasis Selection 2

(2)

28 I2S IN Input Format Selection

(2)

NOTES: (1) Pins 1, 2, 3; Schmitt Trigger input. (2) Pins 22, 25, 26, 27, 28;
Schmitt Trigger input with pull-up resister. (3) Pins 23, 24; Schmitt Trigger
input with pull-down resister.

PIN ASSIGNMENTSPIN CONFIGURATION

PACKAGE DRAWING

PRODUCT PACKAGE NUMBER

(1)

PCM1728E 28-Pin SSOP 324

NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.

PACKAGE INFORMATION

ELECTROSTATIC
DISCHARGE SENSITIVITY

This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.

ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.

The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.

Power Supply Voltage ...................................................................... +6.5V

+V

CC

to +VDD Difference ................................................................... ±0.1V

Input Logic Voltage .................................................. –0.3V to (V

DD

+ 0.3V)

Input Current (except power supply)............................................... ±10mA

Power Dissipation .......................................................................... 400mW

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

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

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

ABSOLUTE MAXIMUM RATINGS

LRCIN

DIN

BCKIN

CLKO

XTI

XTO

DGND

V

DD

VCC2R

AGND2R

EXTR

NC

V

OUT

R

AGND1

I

2

S
DM1
DM0
MUTE
IW1
IW0
RST
ZERO
V

CC

2L
AGND2L
EXTL
NC
V

OUT

L

V

CC

1

1
2
3
4
5
6
7
8

9
10
11
12
13
14

28
27
26
25
24
23
22
21
20
19
18
17
16
15

PCM1728E

®

4

PCM1728

–60dB OUTPUT SPECTRUM

(f = 1kHz, f

S

= 44.1kHz, 24-Bit Data)

Frequency (Hz)

Amplitude (dB)

–60
–70
–80

–90
–100
–110
–120
–130
–140
–150

202468101214161820

–60dB OUTPUT SPECTRUM

(f = 1kHz, f

S

= 44.1kHz, 16-Bit Data)

Frequency (Hz)

Amplitude (dB)

–60
–70
–80

–90
–100
–110
–120
–130
–140
–150

202468101214161820

TYPICAL PERFORMANCE CURVES

All specifications at +25°C, +VCC = +V

DD

= +5V, fS = 44.1kHz, and 24-bit input data, SYSCLK = 384fS, unless otherwise noted.

THD+N vs SAMPLING FREQUENCY

(V

CC

= VDD = 5V, 24-Bit)

Sampling Frequency f

S

(kHz)

THD+N at F/S (dB)

88

91

94

97

100

103

32 44.1 48 96

256fs

384fs

THD+N vs LEVEL

(f

S

= 44.1kHz)

Amplitude (dB)

THD+N (%)

10

1

0.1

0.010

0.001

THD+N (dB)

–20

–40

–60

–80

–100

–30

–50

–70

–90

–50–60 –40 –30 –20 –10 0

16-Bit

24-Bit

DYNAMIC RANGE vs SAMPLING FREQUENCY

(V

CC

= VDD = 5V, 24-Bit)

Sampling Frequency f

S

(kHz)

Dynamic Range (A-weighted) (dB)

110

108

106

104

102

100

32 44.1 48 96

256/384f

S

SNR vs SAMPLING FREQUENCY

(V

CC

= VDD = 5V, 24-Bit)

Sampling Frequency f

S

(kHz)

SNR (A-weighted) (dB)

110

108

106

104

102

100

32 44.1 48 96

256/384f

S