ZHCSGM5A August 2017 – November 2017 TLV320AIC3109-Q1
PRODUCTION DATA.
Decay time determines how quickly the PGA gain is increased when the input signal is too low. It Decay time can be varied in the range from 0.05 s to 22.4 s. Decay time is programmed by writing to register 106, page 0.
The actual maximum AGC decay time is based on a counter length, so the maximum decay time scales with the clock setup that is used. Table 2 lists the relationship of the NCODEC ratio to the maximum time available for the AGC decay. In practice, these maximum times are extremely long for audio applications and must not limit any practical AGC decay time that is needed by the system.
NCODEC RATIO | MAXIMUM DECAY TIME (SECONDS) |
---|---|
1 | 4 |
1.5 | 5.6 |
2 | 8 |
2.5 | 9.6 |
3 | 11.2 |
3.5 | 11.2 |
4 | 16 |
4.5 | 16 |
5 | 19.2 |
5.5 | 22.4 |
6 | 22.4 |