Using the TAS5733LEVM with PurePath Console 3
9
SLOU439 – March 2016
Copyright © 2016, Texas Instruments Incorporated
TAS5733L Evaluation Module
Multiband AGL and Full-Band AGL
The TAS5733L features three multiband AGLs, as well as a full-band AGL. The multiband AGL is used
as a three-band crossover, having an independent custom configuration for low, high, and mid
frequency bands.
The multiband AGL and full-band AGL also offer the option to use preset configurations based on
output power, available for the use of standard power supplies and loads. These presets offer a good
starting point towards the full configuration of the end system.
Table 2. Available Presets for Multiband AGL
TAS5733L Presets
15 W with 12-V PVDD, 4-
Ω
load
10 W with 12-V PVDD, 4-
Ω
load
The filters used for the multiband AGL crossover are configured according to the specific need. By
default, the three-band crossover frequencies are set to 300 Hz and 3 kHz, using second-order
Linkwitz-Riley filters. This filter type was chosen so the total sum of the three-band signals has a flat
response without having to calculate individual cross-over frequencies for unity summation. The
crossover frequencies were selected so they are separated far enough in the frequency range from
each other to avoid any dip caused by the filter sum response. For the mid-band mixer, the coefficients
range is different and features negative values. This is done because when using second order filters to
form a band-pass filter; the phase of the signal is inverted, causing an undesired frequency response
when summing all the signals. This phase inversion is corrected by using negative coefficients for the
mid-band mixer.
Figure 7. Multiband AGL – Three-Band Crossover
