參數(shù)資料
型號： UDA1352HL
廠商： NXP SEMICONDUCTORS
元件分類： 消費(fèi)家電
英文描述： 48 kHz IEC 60958 audio DAC
中文描述： SPECIALTY CONSUMER CIRCUIT, PQFP48
封裝： 7 X 7 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-313-2, LQFP-48
文件頁數(shù)： 14/64頁
文件大?。?/td> 262K
代理商： UDA1352HL
2003 Mar 25
14
Philips Semiconductors
Preliminary specification
48 kHz IEC 60958 audio DAC
UDA1352HL
8.6.3
I
NTERPOLATOR
The UDA1352HL has an on-board interpolating filter that
convertstheincomingdatastreamfrom1f
s
to 64f
s
or 128f
s
by cascading a recursive filter and a Finite Impulse
Response (FIR) filter.
Table 3
Interpolator characteristics
8.6.4
N
OISE SHAPER
The fifth-order noise shaper operates either at
64f
s
or 128f
s
. It shifts in-band quantization noise to
frequencieswellabovetheaudioband.Thisnoiseshaping
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.
8.6.5
F
ILTER STREAM
DAC
The Filter Stream DAC (FSDAC) is a semi-digital
reconstruction filter that converts the 1-bit data stream of
the noise shaper to an analog output voltage.
The filter coefficients are implemented as current sources
andaresummedat virtualground oftheoutputoperational
amplifier. In this way, very high signal-to-noise
performance and low clock jitter sensitivity is achieved.
A post filter is not needed due to the inherent filter function
of the DAC. On-board amplifiers convert the FSDAC
output current to an output voltage signal capable of
driving a line output.
The output voltage of the FSDAC is scaled proportionally
to the power supply voltage.
8.7
Control
The UDA1352HL can be controlled by static pins (when
pin SELSTATIC is HIGH), via the I
2
C-bus (when
pin SELSTATIC is LOW and pin SELIIC is HIGH) or via
the L3-bus (when pins SELSTATIC and SELIIC are
both LOW). For optimum use of the UDA1352HL features,
theL3-bus or I
2
C-busmodes arerecommended since only
basic functions are available in the static pin control mode.
NotethatthestaticpincontrolmodeandL3-busorI
2
C-bus
modes are mutually exclusive. In the static pin control
mode, pins L3MODE and L3DATA are used to select the
format for the data output and input interface (see Fig.5).
PARAMETER
CONDITIONS
VALUE (dB)
±
0.03
50
114
5.67
Pass-band ripple
Stop band
Dynamic range
DC gain
0 to 0.45f
s
>0.55f
s
0 to 0.45f
s
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