BU9253AS Rohm Semiconductor, BU9253AS Datasheet
BU9253AS
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BU9253AS Summary of contents
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... The Karaoke/Surround Digital Echo IC incorporates a digital delay circuit, an input/output mixing circuit, supporting Karaoke echo and surround system, all in a single chip. BU9253AS/FS has functions required by Karaoke echo system, and BU9262AFS has various functions required for surround / echo system. ●Features ＜BU9253AS/FS＞ ...
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... Supply voltage Terminal voltage Power dissipation Storage temperature * Reduce by 8.0 mW/°C over 25°C Note: This IC is not designed to be radiation-resistant. Note: Operation is not guaranteed. ●Operating conditions ＜BU9253AS/FS＞ Parameter Supply voltage Operating temperature Operating frequency ＜BU9262AFS＞ Parameter Operating supply range ...
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... V =5.0V, f =375kHz Parameter Symbol Circuit Current I CC Voltage Gain 1 G Voltage Gain 2 G Output distortion 1 THD1 Output distortion 2 THD2 Output noise V NO1 voltage 1 Output noise V NO2 voltage 2 Maximum output V OM1 voltage 1 Maximum output V OM2 voltage 2 ...
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200mVrms Parameter Symbol Circuit current I CC [Digital delay] Input/Output Gain AV1 THD1 THD2 Output distortion THD3 THD4 VNO1 VNO2 Output noise voltage VNO3 VNO4 Maximum output voltage ...
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... Ta=25℃ 7.0 6.5 6.0 5.5 5.0 4.5 4.0 4.0 4.5 5.0 INPUT VOLTAGE : VCC [V] Fig.1 Current consumption V =5V / Ta=25℃ CC 4.5 4.0 3.5 Mute 3.0 2.5 2.0 1.5 1.0 Mute & OSC stop 0.5 0.0 4.0 4 ...
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Ta=25℃ 4.5 4.7 4.9 5.1 5.3 INPUT VOLTAGE : VCC [V] Fig.13 Circuit current V =5V / Ta=25℃ -10 -20 -30 -40 -50 -60 -70 -80 -80 -60 -40 -20 AMPLITUDE ...
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... ADLPF ADLPF OUT 13 12 ADINT OUT 14 13 ADINT VCC 16 NC2 － MUTE ・BU9253AS Block diagram, Application circuit C1 100p 39k 22u 18 OSC COUNTOR 1 R8 2.2k ・BU9253AS pin assignment Function GND pin Echo level DC control pin Not connected Analog unit DC bypath pin ...
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Block diagram, Application circuit ＜BU9262AFS＞ ・Description of terminal No. Symbol 1 NC Not connected 2 TESTB Test negative logic input pin (normally “H” input) 3 SCK Serial clock input 4 SLT Serial latch input 5 SI Serial data ...
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... Clock is generated by connecting external RC circuit. Clock is used for the delay counter. ・Mute control circuit (MUTE) By input voltage of the mute terminal, 3 statuses, that is, mute, mute release (operating), and clock stop & mute can be selected. ・COUNTER This counter is for generating delay time. It can generate delay time about 131ms at oscillation frequency Fclk = 375kHz. ・ ...
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This circuit controls delay time. -8 delay time can be selected by register ...
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Output/ input LPF circuit This is the LPF circuit connected to the ADC input unit and the DAC output unit. Delay time setting can be select by internal resistor. 48.0msec or below 96.0msec or below S1 S2 ・Auto mute ...
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... As an example, when clock frequency is 375kHz, then sample frequency is 375kHz ÷ 62.5kHz. Therefore, the delay time is: Delay time = (1 ÷ 62500) x 8192 = 131ms Clock frequency is determined by R2, C1 connected to CR terminal (pin 18 in BU9253AS, pin 16 in BU9253FS). When C, R are changed, oscillation frequency changes, but the delay time is kept fixed. ・ ...
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LPF and echo system gain When the ratio of original signal and echo is changed, R5, R6, R9, R11 are also changed, and the characteristics of LPF change too. Therefore necessary to change all the constants of ...
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Use 1) Absolute maximum ratings An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break down the devices, thus making impossible to identify breaking mode, such as a short ...
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Part Number BU9253 Part Number BU9262A SDIP18 <Dimension> 19.4 ± 0 0° ∼ 15° 0.5 ± 0.1 1.778 SSOP-A16 <Dimension> 6.6±0 0.15±0.1 ...
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Catalog No.05T411Be '06.4 ROHM C ...
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Appendix No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product ...