参数资料
| 型号： | LV3328PM-TLM-E |
| 厂商： | ON Semiconductor |
| 文件页数： | 16/26页 |
| 文件大小： | 0K |
| 描述： | IC ELECTRONIC VOLUME AUTO 44QLP |
| 标准包装： | 1,000 |
| 类型： | 音频和音量控制 |
| 应用： | 车载音频 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-BQFP |
| 供应商设备封装： | 44-QIPM |
| 包装： | 带卷 (TR) |
LV3328PM
No.A1657-23/26
Usage Cautions
(1) Request to send the initial data at power ON
Though the circuit initializing the IC inside at power ON is incorporated, be sure to send data to all sub-address as the
initial data at power ON.
At power ON, muting or other measures must be taken externally till the data is set.
Reference data
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
VDD power rise time
Trise
0V → 5V power rise time
30
-
μs
VDD voltage when power ON reset is canceled
Vpor
-
5
-
V
(2) Description of zero cross switching circuit operation
The LV3328PM have a function to switch zero cross comparator signal detection locations, enabling the selection of
the optimum detection location for blocks whose data is to be updated.Basically, the switching noise can be
minimized by inputting the signal immediately following the block whose data is to be updated to the zero cross
comparator, so it is necessary to switch the detection location every time.
LV3328PM zero cross detection circuit
(3) Zero Cross Switching Control method
The zero cross switching control method consists of setting the zero cross control bits to the zero cross detection mode,
and specifying the detection blocks before transmitting the data.
The I2C data is held at rise of the ACK clock. For zero-cross operation, this operation begins at rise of ACK clock of
the first data.
On detecting zero cross, all of holding data are switched. (Without zero cross, data is switched at rise of ACK clock.)
(4) Zero cross timer setting
If the input signal becomes lower than the zero cross comparator detection sensitivity, or if only low-frequency
signals are input, zero cross detection continues to be impossible, and data is not latched during this time. The zero
cross timer can set a time for forcible latch during such a status when zero cross detection is not possible.
(5) Soft step operation
The LV3328PM have a soft step function at 3 band equalizer control block for low switching noise.
The Soft step time can be selected by send to I2C control. (l0ms, 20ms, 40ms, 80ms)
Input gain
Zero cross
comparator
Switch
Volume
Fader
soft step time
Data latch timing
soft step start
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