參數(shù)資料
型號: PGA2311PG4
英文描述: Stereo Audio VOLUME CONTROL
中文描述: 立體聲音頻音量控制
文件頁數(shù): 9/17頁
文件大小: 653K
代理商: PGA2311PG4
SBOS218A
DECEMBER 2001
REVISED JUNE 2002
www.ti.com
9
GAIN SETTINGS
The gain for each channel is set by its corresponding
8
bit code, either R[7:0] or L[7:0] (see Figure 2). The
gain code data is straight binary format. If we let N
equal the decimal equivalent of R[7:0] or L[7:0], then
the following relationships exist for the gain settings:
For N = 0:
Mute Condition. The input multiplexer is connected to
analog ground (AGNDR or AGNDL).
For N = 1 to 255:
Gain (dB) = 31.5
[0.5 w (255
N)]
This results in a gain range of +31.5dB (with N = 255)
to
95.5dB (with N = 1).
Changes in gain setting may be made with or without
zero crossing detection. The operation of the zero
crossing detector and timeout circuitry is discussed lat-
er in this data sheet.
Figure 3. Serial Interface Timing Requirements.
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