NXP Semiconductors UDA1352TS, Datasheet

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2002 Nov 22 3
NXP Semiconductors Preliminary specification
48 kHz IEC 60958 audio DAC UDA1352TS
1 FEATURES
1.1 General
•
2.7 to 3.6 V power supply
•
Integrated digital filter and Digital-to-Analog
Converter (DAC)
•
256f
s
system clock output
•
20-bit data path in interpolator
•
High performance
•
No analog post filtering required for DAC
•
Supporting sampling frequencies from 28 up to 55 kHz.
1.2 Control
•
Controlled either by means of static pins, I
2
C-bus or
L3-bus microcontroller interface.
1.3 IEC 60958 input
•
On-chip amplifier for converting IEC 60958 input to
CMOS levels
•
Lock indication signal available on pin LOCK
•
Information of the Pulse Code Modulation (PCM) status
bit and the non-PCM data detection is available on
pin PCMDET
•
For left and right 40 key channel-status bits available via
L3-bus or I
2
C-bus interface.
1.4 Digital sound processing and DAC
•
Automatic de-emphasis when using IEC 60958 input
with 32.0, 44.1 and 48.0 kHz audio sample frequencies
•
Soft mute by means of a cosine roll-off circuit selectable
via pin MUTE, L3-bus or I
2
C-bus interface
•
Left and right independent dB linear volume control with
0.25 dB steps from 0 to
−
50 dB, 1 dB steps to
−
60,
−
66 and
−∞
dB
•
Bass boost and treble control in L3-bus or I
2
C-bus mode
•
Interpolating filter (f
s
to 64f
s
) by means of a cascade of a
recursive filter and a FIR filter
•
Fifth-order noise shaper (operating at 64f
s
) generates
the bitstream for the DAC
•
Filter Stream DAC (FSDAC).
2 APPLICATIONS
•
Digital audio systems.
3 GENERAL DESCRIPTION
The UDA1352TS is a single-chip IEC 60958 audio
decoder with an integrated stereo DAC employing
bitstream conversion techniques.
A lock indication signal is available on pin LOCK,
indicating that the IEC 60958 decoder is locked.
A separate pin PCMDET is available to indicate whether
or not the PCM data is applied to the input.
By default, the DAC output is muted when the decoder is
out-of-lock. However, this setting can be overruled in the
L3-bus or I
2
C-bus mode.
The UDA1352TS has IEC 60958 input to the DAC only
and is in SSOP28 package.
Besides the UDA1352TS, the UDA1352HL is also
available. The UDA1352HL is the full featured version in
LQFP48 package.
4 ORDERING INFORMATION
TYPE
NUMBER
PACKAGE
NAME DESCRIPTION VERSION
UDA1352TS SSOP28 plastic shrink small outline package; 28 leads; body width 5.3 mm SOT341-1