User Manual

DS851F2 77
CS42L56
6.27.2 PGAx Volume
Sets the volume/gain of the Programmable Gain Amplifier (PGA).
Notes:
1. Refer to Figure 37 and Figure 38 on page 89 for differential and integral nonlinearity (DNL and INL).
6.28 ADCx Attenuator Control: ADCAATT (Address 20h) & ADCBATT (Address 21h)
6.28.1 ADCx Volume
Sets the volume of the ADC signal.
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
76543210
ADCxATT7 ADCxATT6 ADCxATT5 ADCxATT4 ADCxATT3 ADCxATT2 ADCxATT1 ADCxATT0
ADCxATT[7:0] Volume
0111 1111 0 dB
... ...
0000 0000 0 dB
1111 1111 -1.0 dB
1111 1110 -2.0 dB
... ...
1010 0000 -96.0 dB
1001 1111 Mute
... ...
1000 0000 Mute
Step Size: 1.0 dB