is a registered trademark of Philips Semiconductor.
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 mas-
ter 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, third-
order 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 I
2
C-Bus interface.
APPLICATIONS
q
SET-TOP BOXES
q
DIGITAL BROADCAST RECEIVERS
BCK
LRCK
DATA
PCM
Audio
I/F
8x
Oversampling
Digital Filter
and
Sub-Functions
Process
DAC
(L)
DAC
(R)
V
OUT
L
Low-Pass
Filter
and Amp
V
COM
V
OUT
R
ZERO
SCL
SDA
AD1
AD0
XTUN
XT1
27MHz
Crystal
XT2
RST
I
2
C
I/F
and
REGs
Counter N
Counter M
VCXO
Phase
Detector
LPF
VCO
SCKO
(256f
S
/ 384f
S
)
MCKO
(27MHz)
Reset
Power Supply
V
PP
PGND V
CC
AGND V
DD
DGND
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
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 0.1V
DD
and 0.9V
DD
).
(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.
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.
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
, V
DD
, V
PP
. (2) Among V
CC
, V
DD
, V
PP
. (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.
Voltage
(1)
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/ORDERING INFORMATION
PACKAGE
DRAWING
NUMBER
338
"
SPECIFIED
TEMPERATURE
RANGE
–25°C to +85°C
"
PACKAGE
MARKING
PCM1740E
PCM1740E
ORDERING
NUMBER
(1)
PCM1740E
PCM1740E/2K
TRANSPORT
MEDIA
Rails
Tape and Reel
PRODUCT
PCM1740E
"
PACKAGE
SSOP-24
"
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.
®
PCM1740
4
TYPICAL PERFORMANCE CURVES
At T
A
= +25°C, V
CC
= V
DD
= +5V, f
S
= 44.1kHz, F
SCKO
= 384f
S
= 16.9344MHz, and 16-bit data, unless otherwise noted.
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