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BA3826S 데이터시트 PDF




ROHM Semiconductor에서 제조한 전자 부품 BA3826S은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

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부품번호 BA3826S 기능
기능 Band-pass filter for spectrum analyzer
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BA3826S 데이터시트, 핀배열, 회로
Audio ICs
Band-pass filter for spectrum analyzer
BA3826S
The BA3826S is a 7-band ( 2), band-pass filter that uses microprocessor time division to output in serial to left and right
stereo channels. To minimize the number of external components required and enable compact and reliable designs,
all of the capacitors for the filters are on the chip.
FApplications
CD radio cassette players, mini-component stereo systems, car stereos
FFeatures
1) Seven band-pass filter elements for spectrum ana-
lyzer displays.
2) Microprocessor time division used for serial output
on L and R channels.
3) All filter capacitors are built-in to minimize external at-
tached requirements.
4) Low current dissipation (8mA Typ.).
5) Ideal for mini-component stereos and other stereo
equipment.
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
576




BA3826S pdf, 반도체, 판매, 대치품
Audio ICs
(2) Band-pass filter circuit
This circuit extracts the required frequency range from
the input signal and amplifies it.
The center frequency is determined by the value of the
current flowing through the resistor connected to pin 14.
Q is set to 3.5 (Typ.).
Due to the characteristics of the band-pass filter circuit,
the circuit has a transition rise and fall characteristic. Due
to the transition rise characteristic, five input cycles are
required until peak output is reached.
When RESET is input, a built-in circuit cancels the fall
transition characteristic (input the reset signal for 0.5ms).
(4) Timing
BA3826S
(3) DET circuit
The DET circuit detects the signal selected by the band
pass filter and performs peak hold.
The RESET Driver discharges the charge stored in the
capacitor. After the RESET input is released, the RESET
Driver discharges continuously for 14ms.
1) RESET timing
The RESET input is used as the RESET signal for the
band-pass filter circuit and the DET circuit. The setting
time is 0.5ms min.
When performing a RESET input, disable both the Lin
and Rin inputs. The synchronous shift in this case must
be "0.1ms max.
2) Output select timing
The audio input signal is not accepted when the RESET
input and L (R) inputs are low. There are no particular re-
strictions on the select input for the various frequencies,
but there are delay times until the peak voltage is settles
(see (a) and (b) below). Accordingly, set the read timing
for the DET signal after the longer of the delay times in
(a) and (b).
(a) For the band-pass filter, a sampling time of at least
5 cycles is required due to the transition rise characteris-
tic.
579

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BA3826S 전자부품, 판매, 대치품
Audio ICs
(2) Frequency characteristics
The frequency characteristics for this IC are set by an ex-
ternal resistor. The value of this resistor for the specifica-
tion conditions is 120k. Use a potentiometer if you wish
to set the frequency characteristics accurately.
(3) Operating voltage range
Operation of the application example circuit is guaran-
teed provided that the VCC and Vee voltages are within
the specified power supply voltage range, and the ambi-
ent temperature is within the specified range. With regard
to the characteristic values, the output voltage level will
differ from the rated values for the specification condi-
tions if the power supply voltage is reduced, but the in-
herent function of the band-pass filters is preserved.
BA3826S
(4) Load resistance
The various circuit characteristics in this specification
sheet were measured using an output load resistance of
10k. If the load resistance is too low, the I / O gain and
control range vary slightly. Be aware of this when con-
necting the next stage.
(5) Coupling capacitors
Set the polarity of the input electrolytic coupling capaci-
tors after establishing the electrical potential relationship
with the connected input.
FElectrical characteristics curves
FExternal dimensions (Units: mm)
582

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관련 데이터시트

부품번호상세설명 및 기능제조사
BA3826

Band-pass filter for spectrum analyzer

ROHM Semiconductor
ROHM Semiconductor
BA3826S

Band-pass filter for spectrum analyzer

ROHM Semiconductor
ROHM Semiconductor

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