TDA7572TR STMicroelectronics, TDA7572TR Datasheet - Page 44

• Manufacturer Part Number: TDA7572TR
• Description: IC AMP PWM 200W BRIDGE 64HIQUAD
• Manufacturer: STMicroelectronics
• Type: Class Dr

Specifications of TDA7572TR

• Output Type: 1-Channel (Mono)
• Voltage - Supply: 8 V ~ 58 V
• Features: Digital Inputs, I²C, I²S, Mute, Short-Circuit and Thermal Protection, Standby
• Mounting Type: Surface Mount
• Package / Case: 64-HiQUAD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Max Output Power X Channels @ Load: -

DAC
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DAC
A one channel DAC is provided. A balance between die area and functionality has been
made - the interpolator function required for full bandwidth operation has been off-loaded to
an external DSP. This allows Bass-only operation of the DAC without any processing
assistance, while full bandwidth audio requires external interpolation assistance.
The DAC has a differential output:
●
●
On these pins are present a four level squared wave, composed by the differences of two
PWM wave have one an amplitude 16 times lower than the other. The output voltage on
DAC1 and DAC2 is compatible to the digital supply VDIG.
Figure 7.
where is filtered by means of capacitors and put in the AOUT Differential to single-ended
input, as reported in the picture above. The maximum signal present output of converter is
1.4 Vrms. The setting to use for the Diff-to-SE converter is Gain= -3dB
(INLEVEL1=0,INLEVEL0=0).
Communication is through a standard I
Acting on the I
configuration (Fratio(1:0)). With Fratio = "00"/"01" the configuration is for bass only. The
Input sample frequency is 48kHz (Fs). In case of Fratio = "10" the configuration is for full
band. The input sample rate for this case is 96kHz (Fs) and the first x2 interpolator has to be
implemented off-line in the DSP. A well checked structure to realize could be the following:
Coefficients: -11,11,-16,22,-30,40,-53,69,-91,122,-168,247,-426,1300,2047,1300,….
Oversampling
Filter
positive output DAC1(32)
negative output DAC2(31)
Type
Taps, bit
Attenuation
Coefficients It is an Half-Band filter then we have only 15
DAC circuit diagram
2
C Control registers it is possible turn-on the DAC (DACEnb) and choose the
Increasing word rate from Fs to 2Fs.
Remez filter, half band
57, 12
50db attenuation out of 0.55Fs
coefficients (see following)
DAC2
R=2.5k
2
RF=4.7k
S port. I
RF
CF
2
C is available too.
CF
SVR/DGND
R=20k
INP
INM
AC00019
TDA7572