參數(shù)資料
型號(hào)： TDA7500
廠商： STMICROELECTRONICS
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP100
封裝： TQFP-100
文件頁(yè)數(shù)： 28/40頁(yè)
文件大小： 391K
代理商： TDA7500
TDA7500
34/40
Codec
The CODEC is composed of four AD mono converters, three DA stereo converters. The ADC can operate
both in audio mode and in FM/AM mode. When in audio mode, it converts the audio bandwidth from 20 to
20KHz. The A to D is a third order Sigma-Delta converter, the converter resolutions is 20 bit with 88 dB of
dynamic range and 85dB of total harmonic distortion. When in FM mode, the converted bandwidth is up
to 192KHz. The D to A is a third order Sigma-Delta converter with a low noise reconstructing analog filter,
the converter resolution is 20 bit with 93 dB of dynamic range and 85dB of total harmonic distortion. All
the reference voltages are generated inside the chip.
Some capabilities of the CODEC are listed below:
s
20-Bit Resolution
s
Digital Anti-Alias Filtering embedded
s
Adjustable System Sampling Rates
s
93dB D/A Dynamic Range (Not-Weighted)88dB A/D Dynamic Range (Not-Weighted)
s
85dB D/A (THD+N/S)85dB A/D (THD+N/S)
s
Internal Differential Analog Architecture
s
+3.3V Power Supply
SOFTWARE FEATURES
A great flexibility is guaranteed by the two programmable DSP cores. A list of the main software functions
which can be implemented in the TDA7500 is enclosed hereafter. A block diagram of the audio processing
flow is shown in Fig. 19 below.
Figure 19. Software Block Diagram of Audio & Sound Processing
AM/FM Baseband Signal Processing
s
FM weak signal processing
s
Integrated 19 kHz MPX filter and deemphasis
s
flexible noise cancellation
s
flexible multipath detector
Generic Audio Signal Processsing
s
Loudness
s
Bass, treble, fader control
s
Volume control
DLY
HP
PEQ
T
B
LD
DRC
RM
ANR
SM
+
DLY
HP
PEQ
T
B
LD
DRC
ANR
SM
DLY
LP
Audio
noise
reduction
Dynamic
range
compression
Loudness Bass
Treble Parametric
equaliser
Soft
mute
Routing
matrix
Delay
Stereo
input
RF
CF
LF
RR
LR
SW
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