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PGA2320IDWG4 Datasheet(PDF) 9 Page - Burr-Brown (TI)

[Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Click here to check the latest version.
Part # PGA2320IDWG4
Description  Stereo Audio Volume Control
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Manufacturer  BURR-BROWN [Burr-Brown (TI)]
Direct Link  http://www.burr-brown.com
Logo BURR-BROWN - Burr-Brown (TI)

PGA2320IDWG4 Datasheet(HTML) 9 Page - Burr-Brown (TI)

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PGA2320
SBOS312B − JULY 2004 − REVISED DECEMBER 2004
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
• (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 later in this data
sheet.
t
CSCR
t
SDS
t
CFCS
t
SDH
t
CSO
t
CFDO
MSB
CS
SCLK
SDI
SDO
Figure 3. Serial Interface Timing Requirements


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