STEVAL-CCA019V1 STMicroelectronics, STEVAL-CCA019V1 Datasheet - Page 19

• Manufacturer Part Number: STEVAL-CCA019V1
• Description: BOARD EVAL AUDIO AMP FOR TS4982
• Manufacturer: STMicroelectronics

Specifications of STEVAL-CCA019V1

• Amplifier Type: Class AB
• Output Type: 2-Channel (Stereo) with Stereo Headphones
• Max Output Power X Channels @ Load: 2W x 2 @ 4 Ohm; 125mW x 2 @ 16 Ohm
• Voltage - Supply: 5.0V
• Operating Temperature: -40°C ~ 85°C
• Board Type: Fully Populated
• Utilized Ic / Part: TS4982
• Description/function: Audio Amplifiers
• Operating Supply Voltage: 5 V
• Output Power: 2 W
• Product: Audio Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: TS4982
• Other names: 497-10339

TS4982
4.4
4.5
Loudspeaker 3D effect enhancement
The TS4982 features a 3D audio effect which can be programmed at three discrete levels
(LOW, MEDIUM, HIGH) through input pins 3D1 and 3D0 which provide a digital interface.
The correspondence between the logic levels of this interface and 3D effect levels are
shown in the
The 3D audio effect applied to the stereo audio signals evokes perception of spatial hearing
and improves this effect in cases where the stereo speakers are too close to each other,
such as in small handheld devices or mobile equipment.
The perceived amount of 3D effect also depends on many factors such as speaker position,
distance between speakers and listener, frequency spectrum of the audio signal, or the
difference of signal between the left and right channels. In some cases, the volume can
increase when the 3D effect is switched on. This factor depends on the composition of the
stereo audio signal and its frequency spectrum.
Table 12.
Low frequency response
Figure 40. Simplified schematic of input stage
In the low-frequency region, the input coupling capacitor Cin starts to have an effect. Cin
forms, with the Rin, a first order high-pass filter with a -3 dB cut-off frequency:
3D1
0
0
1
1
3D effect settings
Table 12 on page
3D0
0
1
0
1
INPUT
Doc ID 14527 Rev 2
19.
F
CL
External
V
Cin
V
V
V
V
3D1
IH
IH
=
IL
IL
----------------------------------------
2π
⋅
Internal (TS4982)
Rin
BIAS
1
Rin
⋅
Cin
V
V
V
V
V
3D0
IH
IH
IL
IL
Rfeed
Application information
3D effect level
MEDIUM
HIGH
LOW
OFF
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