The BD3813KS and BD3815KS sound processors integrate a gain amp and volume/bass/treble controls on a single chip,
making them optimally suited for use in audio applications, such as AV receivers, home theater systems and mini-component
systems. Used in combination with the BD3812F, a 2ch volume IC, the units enable 6.1ch and 7.1ch operation.
In addition, utilization of a BiCMOS process ensures a wide dynamic range (129dB).
2) Independent 6 channels for Master Volume (0 to -95 dB, MUTE 1dB/Step)
Implementation of a resistance ladder type circuit reduces residual noise and shock sounds during switching.
3) Low current consumption achieved through utilization of BiCMOS processes
4) Maximum output voltage: 4.2Vrms (Vcc=7V, VEE=-7V, RL=10kΩ)
5) Built-in 5ch independent input gain amplifier - useful for amplifying input signals
6) Built-in 2ch output port
7) 2-wire serial control (for both 3.3V and 5V)
●Applications
AV receivers, home theater systems and mini-component systems
*1 Applying voltage only to the VCC side, even if within the specified power supply voltage range, may cause excessive
current to flow, resulting in permanent damage to the IC. Therefore, when starting up the power supplies, VEE and V
should either be powered ON simultaneously, or VEE first, followed by V
*2 Please note the derating characteristics above Ta=25℃: 10mW/℃ (Mounted on a 70mmx70mmx1.6mm sized board).
3) Control Data Format - Basic Configuration
Input direction
MSB LSB
D16 D15 D14 D13 D12 D11D10D9D8D7D6D5D4 D3 D2D1D0
Data
・Control Data Formats
Input direction
D16 D15 D14 D13 D12 D11 D10D9D8D7D6D5D4 D3 D2D1D0
Data
Data
Data
Data
Input Gain
1
2
3
4
FR/FL
D16 D15 D14 D13 D12 D11 D10D9D8D7D6D5D4 D3 D2D1D0
D16 D15 D14 D13 D12 D11 D10D9D8D7D6D5D4 D3 D2D1D0
D16 D15 D14 D13 D12 D11 D10D9D8D7D6D5D4 D3 D2D1D0
Input Gain
SR/SL
Treble Bass
Master Volume FRch Master Volume FLch 0 0 1
Master Volume SRch Master Volume SLch 0 1 0
Data Select Address
Input GainC Input Gain
SW
Input Gain
SB
Port A
TON
E
0:L
1:H
SW1
0:A
1:B
Port B
0:L
1:H
Technical Note
Select Address
SW3
SW2
0:A
0:A
1:B
1:B
* * 1 0 0 0
0 0 0 0
D16 D15 D14 D13 D12 D11 D10D9D8D7D6D5D4 D3 D2D1D0
Data
5
Changing the Select Address settings allows selection of four different control formats.
For Select Address, values except those shown above must not be specified.
The address data must be initialized after every power ON.
* Indicates 0 or 1.
(Example)
Input direction
MSB LSB MSB LSB MSB LSB MSB LSB MSB LSB
Data1 L Data 2 L Data 3 LData 4 LData 5 L
“L” means latch.
After power ON, only the desired data can be set for the second and subsequent times,.
SW2 A: Output the signals of the FR and FL inputs onto the Surround Outputs (SR, SL)
Used when the source is stereo.
B: Output the signals of the SR and SL inputs onto the Surround Outputs (SR, SL)
Used when the source is 5.1ch or 6.1ch.
SW3 A: Output the C input signal onto SB output
Used when the source is 5.1ch with the 6.1ch speaker system installed.
B: Output the SB input signal onto the SB output
Used when the source is 6.1ch with the 6.1ch speaker system installed.
(1) The numbers and data shown above are representative design values and are not guaranteed.
(2) Although the sample application circuits are guaranteed, further verification of the electrical characteristics are
recommended. When modifying external components before use, ensure that sufficient margins are in place by taking
into account variations in the external components themselves as well as the LSI regarding both static and transient
characteristics.
(3) Absolute maximum ratings
Operating or testing the IC over the maximum ratings may damage the part itself as well as peripheral components.
Therefore, please ensure that the specifications are never exceeded. In addition, implementation of fuses or other physical
safety measures is recommended.
potential
(4) V
EE
Ensure that the V
pin voltage is at the lowest potential and that no other pin is at a lower voltage, including transient
EE
phenomena.
(5) Thermal design
Implement thermal designs that take into account the power dissipation under actual operating conditions.
(6) Shorts between pins and erroneous installation
Incorrect mounting may damage the IC. In addition, the presence of foreign particles between the pins, a pin and the
power supply, or a pin and GND may result in destruction.
(7) Operation in a strong magnetic field
Operation in a strong magnetic field may cause malfunction.
(8) Serial control
The wiring pattern of the CL and DA terminals should be routed so as not to cause interference with the analog signal
related lines.
(9) Power ON/OFF
(a) During power ON/OFF a shock sound will be generated. Therefore, use the MUTE function.
(b) When turning ON the power supplies, V
followed by V
, since if VCC is started up first, an excessive current may pass VCC through to VEE.
CC
and VCC should either be powered on simultaneously, or VEE first,
EE
(10) Function switching
For functions except the Master Volume, Treble and Bass controls, use of the MUTE function is recommended.
(11) Port power supply
The port power supply should be turned ON following V
connected to V
EE
.
and VEE. If the port is not used, the port power supply must be
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