參數(shù)資料
型號(hào)： YMU757B-QZ
元件分類： 音頻合成
英文描述： TONE/MUSIC SYNTHESIZER, PQCC20
封裝： LEAD FREE, QFN-20
文件頁(yè)數(shù)： 22/43頁(yè)
文件大?。?/td> 990K
代理商： YMU757B-QZ
YMU757B
-29-
Example of system connection
Warning for the device which makes sound through speaker
A speaker radiates heat in a voice-coil by air flow accompanying vibration of a diaphragm. When DC signal
(several Hz or less) is input, heat radiation characteristics falls rapidly.
In addition, even if it is used lower than the rated input, it may lead to voice-coil burnout, smoke, or ignition of a
speaker.
In order to avoid such situations, be sure to implement one or more preventive measures from the followings.
1. Do not select settings (sound creation) which may generate DC signal.
(Since thoroughness of this preventive measure is generally difficult, we recommend the combined use with
the following 2, 3, and 4)
2. Add the equivalent of DC cut digital filter for cutting DC signal into a digital section.
(As long as “Built-in” is not mentioned in the manual, there is no such built-in circuit inside of a device).
3. Add a DC cut capacitor for cutting DC signal into an analog section.
(When addition is specified in the example of a recommended circuit diagram, be sure to add)
4. When a latter stage device exists in the signal path from this device to speaker, be sure to realize the DC cut is
realized in a latter stage device.
In addition, the above-mentioned measures are based on the assumption that the device itself, DC cut capacitor, and
a latter stage device will be in a normal operation. Therefore, it is also necessary to implement measures based on
the assumption of these part failures.
SCLK
SDIN
SYNC
DVSS
DVDD
YMU757B
/RST
+3.0V
RESET#
SYNC
SDIN
SCLK
CLK_I
CLK
AVDD
AVSS
/IRQ
IRQ#
SPOUT1
SPOUT2
VREF
0.1F
EQ1
EQ2
C1
EQ3
R1
R2
C2
HPOUT
Headphone
AIN
+3.0V
0.1uF
4.7F
0.1F
4.7F
SPVSS
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