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부품번호 | BA3826S 기능 |
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기능 | Band-pass filter for spectrum analyzer | ||
제조업체 | ROHM Semiconductor | ||
로고 | |||
전체 7 페이지수
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
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
4페이지 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 120kΩ. 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
10kΩ. 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
7페이지 | |||
구 성 | 총 7 페이지수 | ||
다운로드 | [ BA3826S.PDF 데이터시트 ] |
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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
BA3826 | Band-pass filter for spectrum analyzer | ROHM Semiconductor |
BA3826S | Band-pass filter for spectrum analyzer | ROHM Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |