SLASEI6A October 2019 – December 2019 TAS2564
PRODUCTION DATA.
The TAS2564 Class-D amplifier supports spread spectrum PWM modulation, which can be enabled by setting the AMP_SS register bit high. This can help reduce EMI in some systems.
AMP_SS | SPREAD SPECTRUM |
---|---|
0
|
Disabled |
1
|
Enabled (default) |
By default the Class-D amplifier's switching frequency is based on the device's trimmed internal oscillator. To synchronize switching to the audio sample rate, set the CLASSD_SYNC register bit high. When the Class-D is synchronized to the audio sample rate, the RATE_RAMP register bit must be set based whether the audio sample rate is based on a 44.1 kHz or 48 kHz frequency. For 44.1, 88.2 and 176.4 kHz, set this bit high. for 48, 96 and 192 kHz, set this bit low. This ensures that the internal ramp generator has the appropriate slope.
CLASSD_SYNC | SYNCHRONIZATION MODE |
---|---|
0
|
Not synchronized to audio clocks (default) |
1
|
Synchronized to audio clocks |
RAMP_RATE | PLAYBACK SAMPLE RATE |
---|---|
0
|
multiples of 48 kHz(default) |
1
|
multiples of 44.1 kHz |
TAS2564 also supports low noise receiver mode which can be enabled by ICN_MODE. In this mode, device gain should be limited to 6dBV. It is recommended to use the device in internal Boost configuration to achieve best noise performance in receiver mode
ICN_MODE | MODE |
---|---|
0
|
Speaker Mode (default) |
1
|
Receiver Mode |