uda1352ts-n3 NXP Semiconductors, uda1352ts-n3 Datasheet - Page 9

• Manufacturer Part Number: uda1352ts-n3
• Description: 48 Khz Iec 60958 Audio Dac
• Manufacturer: NXP Semiconductors

Philips Semiconductors
8.4
The UDA1352TS data path consists of the IEC 60958
decoder, the audio feature processor, the digital
interpolator and noise shaper and the DACs.
8.4.1
The IEC 60958 decoder features an on-chip amplifier with
hysteresis, which amplifies the SPDIF input signal to
CMOS level (see Fig.4).
All 24 bits of data for left and right are extracted from the
input bitstream as well as 40 channel status bits for left and
right. These bits can be read via the L3-bus or I
interface.
The UDA1352TS supports the following sample
frequencies and data bit rates:
The UDA1352TS supports timing levels I, II and III, as
specified by the IEC 60958 standard. This means that the
accuracy of the above mentioned sampling frequencies
depends on the timing level I, II or III as mentioned in
Section 11.4.1.
2002 Nov 22
handbook, halfpage
f
f
f
48 kHz IEC 60958 audio DAC
s
s
s
Fig.4
= 32.0 kHz, resulting in a data rate of 2.048 Mbits/s
= 44.1 kHz, resulting in a data rate of 2.8224 Mbits/s
= 48.0 kHz, resulting in a data rate of 3.072 Mbits/s.
75
Data path
IEC 60958
IEC 60958 input circuit and typical
application.
180 pF
10 nF
INPUT
SPDIF
13
UDA1352TS
MGU656
2
C-bus
9
8.4.2
The audio feature processor automatically provides
de-emphasis for the IEC 60958 data stream in the static
pin control mode and default mute at start-up in the L3-bus
or I
When used in the L3-bus or I
following additional features:
8.4.3
The UDA1352TS includes an on-board interpolating filter
which converts the incoming data stream from 1f
by cascading a recursive filter and a FIR filter.
Table 2 Interpolator characteristics
8.4.4
The fifth-order noise shaper operates at 64f
in-band quantization noise to frequencies well above the
audio band. This noise shaping technique enables high
signal-to-noise ratios to be achieved. The noise shaper
output is converted to an analog signal using a filter stream
DAC.
Pass-band ripple
Stop band
Dynamic range
DC gain
Left and right independent volume control
Bass boost control
Treble control
Mode selection of the sound processing bass boost and
treble filters: flat, minimum and maximum
Soft mute control with raised cosine roll-off.
PARAMETER
2
C-bus mode.
A
I
N
NTERPOLATOR
UDIO FEATURE PROCESSOR
OISE SHAPER
CONDITIONS
0 to 0.45f
0 to 0.45f
>0.55f
2
C-bus mode, it provides the
s
s
s
Preliminary specification
UDA1352TS
VALUE (dB)
s
. It shifts
114
0.03
5.67
50
s
to 64f
s