Instruction Manual

DS773F1 49
CS42L55
6.11 PGA x MUX, Volume:
PGA A (Address 0Bh) & PGA B (Address 0Ch)
6.11.1 Boostx
Configures a +20 dB boost on channel x.
6.11.2 PGA x Input Select
Selects the specified analog input signal into PGA channel x.
Note: For pseudo-differential inputs, the CODEC automatically chooses the respective pseudo-ground
(AIN1REF or AIN2REF) for each input selection.
6.11.3 PGAx Volume
Sets the volume/gain of the Programmable Gain Amplifier (PGA).
Notes:
1. Refer to Figure 23 and Figure 24 on page 69 for differential and integral nonlinearity (DNL and INL).
765432 1 0
BOOSTx PGAxMUX PGAxVOL5 PGAxVOL4 PGAxVOL3 PGAxVOL2 PGAxVOL1 PGAxVOL0
BOOSTx +20 dB Boost
0 No boost applied
1 +20 dB boost applied
PGAxMUX Selected Input to PGAx
0 AIN1x
1AIN2x
PGAxVOL[5:0] Volume
01 1111 12 dB
... ...
01 1000 12 dB
... ...
00 0001 +0.5 dB
00 0000 0 dB
11 1111 -0.5 dB
... ...
11 0100 -6.0 dB
... ...
10 0000 -6.0 dB
Step Size: 0.5 dB