ZHCSGM5A August 2017 – November 2017 TLV320AIC3109-Q1
PRODUCTION DATA.
The maximum PGA gain that can be applied by the AGC algorithm can be restricted. This restriction can be used for limiting PGA gain in situations where environmental noise is greater than the programmed noise threshold. The PGA gain can be programmed from 0 dB to 59.5 dB in steps of 0.5 dB.
The time constants are correct when the ADC is not in double-rate audio mode. The time constants are achieved by using the fS(ref) value programmed in the control registers. However, if the fS(ref) is set in the registers (for example, to 48 kHz), but the actual audio clock or PLL programming results in a different fS(ref) in practice, then the time constants are incorrect; see the Decay Time section for more information.