ZHCSRJ6D June 2010 – October 2024 TLV320AIC3104-Q1
PRODUCTION DATA
The output common-mode voltage and output range of the analog output are determined by an internal band-gap reference, in contrast to other codecs that may use a scaled version of the analog supply. This scheme is used to reduce the coupling of noise that may be on the supply into the audio signal path.
However, due to the possible wide variation in analog supply range (2.7 V to 3.6 V), an output common-mode voltage setting of 1.35 V, which would be used for a 2.7-V supply case, would be overly conservative if the supply is actually much larger, such as 3.3 V or 3.6 V. In order to optimize device operation, the TLV320AIC3104-Q1 includes a programmable output common-mode level, which can be set by register programming to a level most appropriate to the actual supply range used by a particular customer. The output common-mode level can be varied among four different values, ranging from 1.35 V (most appropriate for low supply ranges, near 2.7 V) to 1.8 V (most appropriate for high supply ranges, near 3.6 V). Note that the recommended DVDD voltage is dependent on the common-mode setting, as shown in Table 7-4.
| CM SETTING | RECOMMENDED AVDD, DRVDD | RECOMMENDED DVDD |
|---|---|---|
| 1.35 V | 2.7 V–3.6 V | 1.525 V–1.95 V |
| 1.5 V | 3 V–3.6 V | 1.65 V–1.95 V |
| 1.65 V | 3.3 V–3.6 V | 1.8 V–1.95 V |
| 1.8 V | 3.6 V | 1.95 V |