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PGA2310
SBOS207B − OCTOBER 2001 − REVISED JUNE 2004
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.
CS
t
CSCR
t
SDS
t
CFCS
SCLK
t
SDH
SDI
SDO
MSB
t
CSO
t
CFDO
t
CSZ
Figure 3. Serial Interface Timing Requirements
9
BURR-BROWN [ BURR-BROWN CORPORATION ]
