BD3870FS-E2 Rohm Semiconductor, BD3870FS-E2 Datasheet
BD3870FS-E2
Specifications of BD3870FS-E2
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BD3870FS-E2 Summary of contents
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... BD3870FS BD3871FS Vcc 800 * 800 * Topr -25 to +75 -25 to +75 Tstg -55 to +125 -55 to +125 Symbol BD3870FS BD3871FS Vcc 4.5 to 9.5 4.5 to 9.5 1/15 No.10086EAT02 BD3873FS BD3872FS 0, 5, 10, 19, 21, 18, 21, 24, 27dB 23, 26, 28dB No Yes Three inputs Five inputs 0 to –87dB -87dB/ 1dB step, - ...
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... BD3870FS,BD3871FS,BD3872FS,BD3873FS ●Electrical characteristics (Ta=25 ℃ , VCC=8V, f=1kHz, Vi=200mVrms, RL=10kΩ, Rg=600Ω, Input Gain=0dB (BD3870FS, BD3872FS only), Input Gain=24dB (BD3871FS only), Input Gain=18dB (BD3873FS only),Volume=0dB, Bass=0dB, Treble=0dB, Surround=OFF, Loud Speaker Equalizer=OFF (BD3872FS only), unless otherwise noted) Parameter Circuit Current Total Output Voltage Gain ...
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... BD3870FS,BD3871FS,BD3872FS,BD3873FS ●Timing chart 1) Signal Timing Conditions ・Data is read on the rising edge of the clock. ・Latch is read out on the falling edge of the clock. ・Latch signal must end with the LOW state. ・To avoid malfunctions, clock and data signals must terminate with the LOW state. ...
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... BD3870FS,BD3871FS,BD3872FS,BD3873FS 3) Control Data Format List Basic Configuration of Control Data Format Data input direction MSB D9 D8 Control Data Format (BD3870FS, BD3871FS, BD3873FS) Data input direction D9 D8 (1) Input Selector (2) (3) Bass Gain ( Control Data Format (BD3872FS) Data input direction D9 D8 ...
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... BD3870FS,BD3871FS,BD3872FS,BD3873FS ●Block diagram, application circuit, pin assignment (BD3870FS, BD3871FS, BD3873FS) 0.0022μ 0.0022μ 0.33μ Treble1 fc=8k Hz 0dB ～ -87dB -∞ Vcc/2 Vcc ●Pin description (BD3870FS, BD3871FS, BD3873FS) Pin No. Pin Name Description 1 VIN1 1ch volume input pin 2 VIN2 2ch volume input pin ...
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... BD3870FS,BD3871FS,BD3872FS,BD3873FS ●Block diagram, application circuit, pin assignment (BD3872FS) 0.001μ 0.001μ 0.022μ 62K Vcc/2 Vcc Loud Loud speaker speaker equalizer2 0dB 0dB ～ ～ -87dB -87dB -∞ -∞ Vcc/2 Vcc 0.22μ 0.22μ www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. ...
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... BD3870FS,BD3871FS,BD3872FS,BD3873FS 0.33μ 0.01μ 0.33μ 0.01μ Loud speaker Loud speaker equalizer1 Treble1 equalizer2 fc=10kHz 0dB 0dB ～ ～ -87dB -87dB -∞ -∞ Vcc/2 Vcc 0.22μ 0.22μ www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 0.0022μ ...
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... BD3870FS,BD3871FS,BD3872FS,BD3873FS ●Pin description (BD3872FS) Pin No. Pin Name Description 1 VIN1 1ch volume input pin 2 SEL1 1ch input selector output pin 3 VIN2 2ch volume input pin 4 SEL2 2ch input selector output pin 5 A1 1ch input pin 2ch input pin 1ch input pin 2ch input pin B ...
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... BD3870FS,BD3871FS,BD3872FS,BD3873FS ●Description of operations 1) Bass filter Using external components, center frequencies and Q factors of the bass characteristics are flexible Fig.5 Standard values of R3, R4 (reference) (R1=5.6kΩ, R2=390kΩ, C1=C2=0.1µF) Bass Boost Cut Amount 0dB 2dB 4dB 6dB 8dB 10dB 12dB 14dB * The actual boost cut amount may deviate from the standard values in some degree. ...
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... BD3870FS,BD3871FS,BD3872FS,BD3873FS 2) Treble filter Fig.7 Standard values of R1, R2 (reference) Treble Boost Cut Amount 0dB 2dB 4dB 6dB 8dB 10dB 12dB 14dB (BD3872FS only) * The actual boost cut amount may deviate from the standard values in some degree. 3) Matrix surround L R Matrix surround is constructed as shown above. Gains are defined as follows: In-phase Gain: Gains obtained on OUT1 and OUT2 against IN1 when inputting a signal of the equivalent level and in-phase (L=R) to IN1 and IN2 ...
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... BD3870FS,BD3871FS,BD3872FS,BD3873FS 1) Sound generation using Loud Speaker Equalizer (BD3872FS) Using external components, one of the following two functions can be established; one having an effect to localize the vocal forward and enhance it (Loud Speaker Equalizer) and the other having an effect to clarify the vocal quality and improve the Articulation Index (Cinema Surround). Those characteristic values can be adjusted by choosing the external components with desirable constants. Details of above two functions are described below: ◎ ...
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... FREQUENCY (Hz) Fig.20 Treble Gain - Frequency (BD3872FS) 12/15 Technical Note 10 1 0.1 0.01 0.001 0.001 0.01 0 INPUT VOLTAGE (Vrms) Fig.15 Total Harmonic Distortion ratio - Input Voltage (BD3870FS) 15 +14dB 10 -14～+14dB 5 2dB step 0 -5 -10 -14dB -15 10 100 1000 10000 100000 FREQUENCY (Hz) Fig ...
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... BD3870FS,BD3871FS,BD3872FS,BD3873FS ●Notes for use 1) Numbers and data in entries are representative design values and are not guaranteed values of the items. 2) Although ROHM is confident that the example application circuit reflects the best possible recommendations, be sure to verify circuit characteristics for your particular application. Modification of constants for other externally connected circuits may cause variations in both static and transient characteristics for external components as well as this Rohm IC ...
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... BD3870FS,BD3871FS,BD3872FS,BD3873FS 12) Switching noise For Surround and Loud Speaker Equalizer (BD3872FS only), external capacitor C is attached to the CAP pin as a measures to control the switching noise. In the application circuit, a constant value as an example, is indicated by the CAP pin. The time constant, which is used to charge/discharge the external capacitor C (varying between Vbe to 5Vbe (2.65V)) on the CAP pin, controls the soft switching operation. The switching time constant T is stated as T=2.55× ...
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... BD3870FS,BD3871FS,BD3872FS,BD3873FS ● Ordering part number Part No. Part No. 3870,3871,3873 3872 SSOP-A24 10 ± 0.2 (MAX 10.35 include BURR 0.1 0.38±0.1 0.8 SSOP-A32 13.6 ± 0.2 (MAX 13.95 include BURR 0.36 ± 0.1 0.1 0.8 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. ...
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No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose ...