Burr Brown PCM1740E, PCM1740E-2K Datasheet

®

1

PCM1740

Stereo Audio

DIGITAL-TO-ANALOG CONVERTER

with VCXO and PLL

PCM1740

®

FEATURES

● COMPLETE DELTA-SIGMA STEREO DAC

● VOLTAGE-CONTROLLED CRYSTAL

OSCILLATOR: 27MHz ±150ppm Output with
0V to 3V Input

● PROGRAMMABLE PLL

256fS or 384fS Audio System Clock Output

● DYNAMIC PERFORMANCE:

Dynamic Range: 94dB
SNR: 94dB
THD+N: –89dB

● SAMPLING FREQUENCIES:

16kHz, 22.05kHz, 24kHz
32kHz, 44.1kHz, 48kHz
64kHz, 88.2kHz, 96kHz

● SERIAL AUDIO INTERFACE:

Standard or I2S Data Formats
16-, 20-, or 24-Bit Data

● I2C-BUS® INTERFACE FOR CONTROL

REGISTERS

(1)

:
Slave Receiver Operation
7-Bit Addressing
Standard Transfer Rate (up to 100kbps)

● PROGRAMMABLE CONTROLS:

Digital Attenuation (256 steps)
Soft Mute
Infinite Zero Detect Mute
De-Emphasis (32kHz, 44.1kHz, 48kHz)
DAC Output Mode

● SINGLE +5V SUPPLY

● SMALL SSOP-24 PACKAGE

© 2000 Burr-Brown Corporation PDS-1551A Printed in U.S.A. February, 2000

For most current data sheet and other product

information, visit www.burr-brown.com

TM

DESCRIPTION

The PCM1740 is a complete stereo audio digital-to-analog
converter with on-chip PLL and VCXO. The PCM1740 is
designed specifically for set-top box applications requiring
high-quality audio playback, a precision tuned 27MHz mas­ter clock source, and support for multiple audio-sampling
frequencies.

The stereo D/A converter utilizes multi-bit, delta-sigma
architecture, which includes an 8x interpolation filter, third­order noise shaping, 5-level amplitude quantization, and an
analog low-pass filter. The PCM1740 includes a number of
user-programmable functions, which are accessed via a
standard I2C-Bus interface.

APPLICATIONS

● SET-TOP BOXES

● DIGITAL BROADCAST RECEIVERS

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: [phone]

Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]

NOTE: (1) I2C-Bus® is a registered trademark of Philips Semiconductor.

PCM1740

PCM

Audio

I/F

I

2

C

I/F

and

REGs

VCXO

SCL
SDA
AD1
AD0

XTUN

XT1

XT2

RST

27MHz
Crystal

8x

Oversampling

Digital Filter

and

Sub-Functions

Process

DAC

(R)

Counter N

V

OUT

L

V

COM

ZERO

SCKO

(256f

S

/384fS)

MCKO

(27MHz)

V

OUT

R

Counter M

Power Supply

Reset

BCK

LRCK

DATA

Phase

Detector

V

PP

AGND DGNDV

CC

V

DD

PGND

DAC

(L)

Low-Pass

Filter

and Amp

LPF

VCO

®

2

PCM1740

SPECIFICATIONS

All specifications at TA = +25°C, V

CC

= V

DD

= V

PP

= 5.0V, fS = 44.1kHz, system clock = 384fS, 16-bit data, unless otherwise noted.

PCM1740E

PARAMETER CONDITIONS MIN TYP MAX UNITS
RESOLUTION 16 Bits
DATA FORMAT

Audio Interface Format Standard/ I

2

S Selectable

Audio Data Bit Length 16/20/24 Selectable Bits
Audio Data Format MSB First, Two’s Binary Complement
Sampling Frequency (f

S

) Standard (fS) 32 44.1 48 kHz

Half (fS) 16 22.05 24 kHz

Double (f

S

) 64 88.2 96 kHz

Internal System Clock Frequency 256f

S

/384f

S

DIGITAL INPUT/OUTPUT

Logic Family Input Logic TTL Compatible
High Level Input Voltage: V

IH

(1), (2)

2.0 VDC

Low Level Input Voltage: V

IL

(1), (2)

0.8 VDC

High Level Input Current: I

IH

(1), (2)

VIH = V

DD

±10 µA

Low Level Input Current:

I

IL

(1)

VIL = 0V ±10 µA

I

IL

(2)

VIL = 0V –120 µA

High Level Output Voltage: V

OH

(3)

IOH = –2mA VDD – 0.5V VDC

Low Level Output Voltage:

V

OH

(3)

IOL = 4mA 0.5 VDC

V

OL

(4)

IOL = 2mA 0.5 VDC

DIGITAL INPUT/OUTPUT of I

2

C-BUS INTERFACE

High Level Input Voltage: V

IH

(5)

3.0 V

Low Level Input Voltage: V

IL

(5)

–0.3 1.5 V

Low Level Output Voltage: V

OL

(6)

0 0.4 V

Output Fall Time: t

OF

(7)

250 ns

Input Logic Current: I

I

(8)

10% to 90% of V

DD

–10 10 µA

Capacitance for each I/O pin: C

I

(5)

10 pF

VCXO CHARACTERISTICS (MCKO) 27MHz, Fundamental Crystal
Crystal Clock Frequency

(9)

27.0000 MHz

Crystal Clock Accuracy

(9)

±30 ppm

XTUN Tuning Voltage Range

(10)

0 3.0 V

XTUN Input Impedance

(10)

60 kΩ
Output Clock Frequency XTUN = 1.3V 27.0000 MHz
Output Clock Accuracy XTUN = 1.3V ±50 ppm
VCXO Tuning Range XTUN = 0V – 3V 300 ppm
Output Clock Duty Cycle 10pF Load 35 45 55 %
Output Clock Jitter Standard Deviation 100 ps
Output Rise Time 20% to 80% V

DD

, 10pF Load 4 ns

Output Fall Time 80% to 20% V

DD

, 10pF Load 4 ns

Response Time

(11)

10 µs

Power Up Time

(12)

5ms

PLL AC CHARACTERISTICS (SCKO)

Output Clock Frequency MCKO = 27.0MHz 4.096 36.864 MHz
Output Clock Duty Cycle 10pF Load 40 50 60 %
Output Clock Jitter Standard Deviation 150 ps
Output Rise Time 20% to 80% V

DD

, 10pF Load 4 ns

Output Fall Time 80% to 20% V

DD

, 10pF Load 4 ns

Frequency Transition Time

(13)

20 ms

Power Up Time

(14)

15 30 ms

DYNAMIC PERFORMANCE

(15)

THD+N:

V

OUT

= 0dB fS = 44.1kHz 0.0035 0.01 %

fS = 96kHz 0.007 %

V

OUT

= –60dB fS = 44.1kHz 0.0035 0.01 %

f

S

= 96kHz 0.007 %

Dynamic Range f

S

= 44.1kHz, EIAJ, A-Weighted 90 94 dB

f

S

= 96kHz, A-Weighted 90 dB

Signal-to-Noise Ratio

(16)

fS = 44.1kHz, EIAJ, A-weighted 90 94 dB

f

S

= 96kHz, A-weighted 90 dB

Channel Separation f

S

= 44.1kHz 88 92 dB

f

S

= 96kHz 88 dB

Level Linearity Error V

OUT

= –90dB ±1.0 dB

®

3

PCM1740

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.

DC ACCURACY

Gain Error ±1.0 ±3.0 % of FSR
Gain Mismatch, Channel-to-Channel ±1.0 ±3.0 % of FSR

Bipolar Zero Error ±1.0 % of FSR

ANALOG OUTPUT

Voltage Range Full Scale (0dB) 0.62 V

CC

Vp-p

Center Voltage 0.5 V

CC

VDC

Load Impedance AC Coupled 5 kΩ

DIGITAL FILTER PERFORMANCE

Passband 0.445 f

S

Hz

Stopband 0.555 f

S

Hz
Passband Ripple ±0.17 dB
Stopband Attenuation –35 dB
De-Emphasis Error –0.2 +0.55 dB

Delay Time 11.125 / f

S

sec

ANALOG FILTER PERFORMANCE

Frequency Response 20Hz to 20kHz –0.16 dB

20Hz to 40kHz –0.6 dB

POWER SUPPLY REQUIREMENTS

Voltage Range V

DD

, VCC, V

PP

+4.5 +5 +5.5 VDC

Supply Current, I

DD

+ ICC + I

PP

VDD = VCC = V

PP

= +5V 25 30 mA

Power Dissipation V

DD

= VCC = V

PP

= +5V 125 150 mW

TEMPERATURE RANGE

Operation –25 +85 °C
Storage –55 +125 °C
Thermal Resistance,

θ

JA

100 °C/W

NOTES: (1) Pins 6, 7, 18, 19: AD0, AD1, BCK, DATA, LRCK (Schmitt trigger input). (2) Pin 10: RST (Schmitt trigger input with internal pull-up resistor). (3) Pins
5, 21: MCKO, SCKO. (4) Pin 16: ZERO (open drain output). (5) Pins 8, 9: SCL, SDA. (6) Pin 9: SDA (open drain output, I

OL

= 3mA). (7) Pin 9: SDA (from V

IHMIN

to V

ILMAX

with a bus capacitance from 10pF to 400pF). (8) Pins 8, 9: SCL, SDA (input current each I/O pin with an input voltage between 0.1VDD and 0.9VDD).
(9) This characteristic is the requirement for crystal oscillator. (10) Pin 3: XTUN. (11) The maximum response time when the XTUN is changed. (12) The maximum
delay time from power on to oscillation. (13) The maximum lock up time when the PLL frequency is changed. (14) The maximum delay time from power on to lock
up. (15) Dynamic performance specifications are tested with a 20kHz low-pass filter using a Shibasoku distortion analyzer 725°C with 30kHz LPF, 400Hz HPF,
Average-Mode. (16) SNR is tested with infinite zero detection circuit disabled.

PCM1740E

PARAMETER CONDITIONS MIN TYP MAX UNITS

SPECIFICATIONS

All specifications at TA = +25°C, V

CC

= V

DD

= V

PP

= 5.0V, fS = 44.1kHz, system clock = 384fS, 16-bit data, unless otherwise noted.

®

4

PCM1740

PIN NAME I/O FUNCTION

1 XT1 — 27MHz Crystal connection.
2 PGND — PLL and VCXO ground.
3 XTUN IN VCXO tune, tuning voltage range from 0V to 3V.
4V

PP

— PLL and VCXO power supply, +5V.
5 MCKO OUT Buffered clock output of VCXO.
6 AD0 IN Device address pin for I

2

C-BUS.

(1)

7 AD1 IN Device address pin for I2C-BUS.

(1)

8 SCL IN Bit clock input for I2C-BUS interface.
9 SDA

IN/OUT

Serial data for I2C-BUS interface.

10 RST IN Reset, active LOW.

(2)

11 V

OUT

R OUT Right-channel analog voltage output.
12 AGND — Analog ground.
13 V

CC

— Analog power supply, +5V.

14 V

OUT

L OUT Left-channel analog voltage output.
15 V

COM

— DC common-mode voltage output.

16 ZERO OUT Zero flag output, active LOW.

(3)

17 BCK IN Bit clock input for serial audio data.

(1)

18 DATA IN Serial audio data input.

(1)

19 LRCK IN Left and right word clock, equal to the sampling

rate (f

S

).

(1)

20 RSV — Reserved must be open.
21 SCKO OUT System clock output, 256/384 f

S

.

22 V

DD

— Digital power supply, +5V.
23 DGND — Digital ground.
24 XT2 — 27MHz Crystal connection.

NOTES: (1) Schmitt trigger input. (2) Schmitt trigger input with internal
pull-up resistor. (3) Open drain output.

Power Supply Voltage

(1)

...................................................................+6.5V

Supply Voltage Differences

(2)

........................................................... ±0.1V

GND Voltage Differences

(3)

.............................................................. ±0.1V

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

DD

+ 0.3V)

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

CC

+ 0.3V)

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

Operating Temperature Range ......................................... –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) V

CC

, VDD, VPP. (2) Among VCC, VDD, VPP. (3) Among AGND, DGND,
and PGND. 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.

PIN ASSIGNMENTSPIN CONFIGURATION

Top View SSOP

ABSOLUTE MAXIMUM RATINGS

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.

PACKAGE SPECIFIED
DRAWING TEMPERATURE PACKAGE ORDERING TRANSPORT

PRODUCT PACKAGE NUMBER RANGE MARKING NUMBER

(1)

MEDIA

PCM1740E SSOP-24 338 –25°C to +85°C PCM1740E PCM1740E Rails

" " " " PCM1740E PCM1740E/2K Tape and Reel

NOTE: (1) Models with a slash (/) are available only in Tape and Reel in the quantities indicated (e.g., /2K indicates 2000 devices per reel). Ordering 2000 pieces
of “PCM1740E/2K” will get a single 2000-piece Tape and Reel.

PACKAGE/ORDERING INFORMATION

XT1

PGND

XTUN

V

PP

MCKO

AD0

AD1

SCL

SDA
RST

V

OUT

R

AGND

PCM1740

XT2
DGND
V

DD

SCKO
RSV
LRCK
DATA
BCK
ZERO
V

COM

V

OUT

L

V

CC

1
2
3
4
5
6
7
8

9
10
11
12

24
23
22
21
20
19
18
17
16
15
14
13

®

5

PCM1740

TYPICAL PERFORMANCE CURVES

At TA = +25°C, VCC = VDD = +5V, fS = 44.1kHz, F

SCKO

= 384fS = 16.9344MHz, and 16-bit data, unless otherwise noted.

FREQUENCY RESPONSE

(De-emphasis OFF, f

S

= 44.1kHz)

f

S

Level (dB)

0

–20

–40

–60

–80

–100

01234

PASSBAND RIPPLE

(De-emphasis OFF, f

S

= 44.1kHz)

f

S

Level (dB)

0

–0.2

–0.4

–0.6

–0.8

–1

0 0.20.1 0.3 0.4 0.5

DE-EMPHASIS FREQUENCY RESPONSE (3kHz)

0 5k 10k 15k 20k 25k

Frequency (Hz)

0
–2
–4
–6
–8

–10
–12

DE-EMPHASIS FREQUENCY RESPONSE (44.1kHz)

0 5k 10k 15k 20k 25k

Frequency (Hz)

0
–2
–4
–6
–8

–10
–12

DE-EMPHASIS FREQUENCY RESPONSE (48kHz)

0 5k 10k 15k 20k 25k

Frequency (Hz)

0
–2
–4
–6
–8

–10
–12

Level (dB) Level (dB) Level (dB)

DE-EMPHASIS ERROR (3kHz)

0 3628 7256 10884 14512

0 4999.8375 9999.675 14999.5125 19999.35

0 5442 10884 16326 21768

Frequency (Hz)

0.6

0.4

0.2
0

–0.2
–0.4
–0.6

0.6

0.4

0.2
0

–0.2
–0.4
–0.6

0.6

0.4

0.2
0

–0.2
–0.4
–0.6

DE-EMPHASIS ERROR (44.1kHz)

Frequency (Hz)

DE-EMPHASIS ERROR (48kHz)

Frequency (Hz)

Error (dB) Error (dB) Error (dB)

®

6

PCM1740

TYPICAL PERFORMANCE CURVES (Cont.)

At TA = +25°C, VCC = VDD = +5V, fS = 44.1kHz, F

SCKO

= 384fS = 16.9344MHz, and 16-bit data, unless otherwise noted.

ANALOG FILTER

(1Hz to 10MHz)

Log Frequency (Hz)

Level (dB)

20

0

–20

–40

–60

–80

–100

0 0.20.1 0.1 0.3 0.40.4 0.5

ANALOG FILTER

(1Hz to 20kHz)

Log Frequency (Hz)

Level (dB)

0.05

0

–0.05

–0.1

–0.15

110 1k100 10k 100k

SUPPLY CURRENT vs SAMPLING FREQUENCY

Sampling Frequency (kHz)

Supply Current (mA)

35

30

25

20

32 64 88.244.1 48 96.0

THD+N (FS), DYNAMIC RANGE, and SNR

vs SUPPLY VOLTAGE

(Temperature = 25°C, 384f

S

, fS = 44.1kHz)

Supply Voltage (V)

THD+D (FS) (%)

0.005

0.004

0.003

0.002

0.001

0.000

Dynamic Range, SNR (dB)

95

94

93

92

91

90

4.25 4.5 5.254.75 5 5.5 5.75

SNR

THD+N

Dynamic Range

THD+N (FS), DYNAMIC RANGE, and SNR

vs TEMPERATURE

(V

CC

= VDD = VPP = 5V, 384fS, fS = 44.1kHz)

Temperature (°C)

THD+D (FS) (%)

0.005

0.004

0.003

0.002

0.001

0.000

Dynamic Range, SNR (dB)

95

94

93

92

91

90

–50 –25 500 25 75 100

SNR

THD+N

Dynamic Range

THD+N (FS), DYNAMIC RANGE, and SNR

vs SAMPLING FREQUENCY

Sampling Frequency (kHz)

THD+D (FS) (%)

0.010

0.008

0.006

0.004

0.002

0.000

Dynamic Range, SNR (dB)

96

94

92

90

88

86

32 64 88.244.1 48 96.0

SNR

THD+N

Dynamic Range