SLASF23A December 2023 – January 2025 TAC5212
PRODUCTION DATA
For applications that require an even higher SNR than that supported for each channel, the device's digital summing mode can be used. In this mode, the digital record data are summed up across the channel with an equal weightage factor, which helps in reducing the effective record noise. The device supports a fully programmable mixer feature that can mix the various input channels with their custom programmable scale factor to generate the final output channels. Figure 7-29 shows a block diagram that describes the mixer 1 operation to generate output channel 1. The programmable coefficients for the mixer operation are located in the Section 8.2.3. The co-efficient of programmable mixer range starts from 7FFFFFFF to FFFFFFFF(-1 to +1), where 7FFFFFFF = +1, FFFFFFFF = -1 and 00000000 = 0.
Figure 7-29 Programmable Digital Mixer Block DiagramA similar mixer operation is performed by mixer 2, mixer 3, and mixer 4 to generate output channel 2, channel 3, and channel 4, respectively. TI recommends using the PPC3 GUI for configuring the programmable coefficients settings; for more details see the Mixer Configuration for TAC5x1x and TAC5x1x-Q1 CODECs and the PurePathâ„¢ console graphical development suite. Additional details on the configurations can be found in the Using the TAx5x1x Programmable Digital Channel Mixer application report.