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PDF R2A15906SP Data sheet ( Hoja de datos )
| Número de pieza | R2A15906SP | |
| Descripción | DIGITAL ECHO | |
| Fabricantes | Renesas | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de R2A15906SP (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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PRELIMINARYsoNmoetipcear;aTmheitsriicslnimotitasfairnealsuspbejecciftitcoatciohnan. ge.
CONFIDENTIAL
R2A15906SP
DIGITAL ECHO WITH MIC MIXING AMP
DDISISCCRRIPIPTTIOIONN
The R2A15906SP is a CMOS IC that has a microphone peripheral circuit and
an echo generation circuit for karaoke use, on a single chip.
FFEEAATTUURREESS
Package
High-performance digital echo circuit using 44-Kbit RAM
A mic amplifier with an ALC makes it possible to handle
overload input, and the ALC operating voltage can be
externally set to the desired value.
Built-in mic volume, echo volume, and feedback volume
Internal mic mixing amplifier
Outline 28Pin SOP
1.27mm pitch
The clock has an internal current control-type oscillation
circuit, and the generation of unnecessary oscillation can
be prevented because the clock does not affect anything external to the unit.
Internal Auto Reset circuit that functions when the power supply is turned on.
MIC Volume, Echo Volume, and Feedback Volume are controlled
by I2C Bus or DC control. (Delay Time is only I2C Bus )
5 V single power supply
RREECCOOMMMMEENNDDEEDDOOPPEERRAATTININGGCCOONNDDITITIOIONN
Supply voltage …… VCC = 5.0V (typ)
SSYYSSTTEEMMCCOONNFFIGIGUURRAATTIOIONN
Lch
Input
Rch
Input
KEY
CONTROL
MIX
MIX
Lch
Output
Rch
Output
MIC MIX
MIC VOL
ALC
ECHO
ECHO
VOL
MIX
FB VOL
Delay
Output
2006/05/15
R2A15906SP ver.C
(1/14)
1 page  
PRELIMINARYsoNmoetipcear;aTmheitsriicslnimotitasfairnealsuspbejecciftitcoatciohnan. ge.
CONFIDENTIAL
R2A15906SP
DIGITAL ECHO WITH MIC MIXING AMP
AAPPPPLLICICAATTIOIONNEEXXAAMMPPLLEE 11
I2C BUS control
<13pin(BUS/DC)=H>
10uF
1
REF
VCC=5V
2
4.7uF
3
MIC IN1
MIC IN2
51kΩ
24kΩ
1uF
0.01uF
4
5
1uF
4.7kΩ
0.15uF
100pF
6
7
100kΩ
330kΩ
1uF Control MIC
Volume
8
15kΩ
1uF
9
3300pF
15kΩ
15kΩ
10
680pF
11
28
1uF
30kΩ
27
30kΩ 0.1uF
MIXOUT
26
1uF
25
680pF 15kΩ
24
15kΩ
3300pF
23 15kΩ
0.1uF
22
21
0.1uF
20
0.1uF
19
0.1uF
18
OPEN 12
13pin(BUS/DC)
Hi: I2C BUS control
13
14
12kΩ
MCLK
17
16
I2C
BUS
15
2006/05/15
R2A15906SP ver.C
(5/14)
5 Page 
PRELIMINARYsoNmoetipcear;aTmheitsriicslnimotitasfairnealsuspbejecciftitcoatciohnan. ge.
CONFIDENTIAL
R2A15906SP
DIGITAL ECHO WITH MIC MIXING AMP
2. ALC operating voltage setting
ALC operating voltage can be set at a desired value between-10 and +3dBV by varying the DC voltage
applied to pin (ALC operating voltage setting terminal).
(Setting method)
1
2.5V( 2
Vcc)
INTERNAL DC BIAS
ONE SIDE
PEAK BOLTAGE,Vpo
VOLTAGE APPLIED TO PIN, ALC_LC
0V
VALC=
1
2
VCC-Vpo
To set ALC operating voltage at –5dB (Vcc=5V)
-5dBV=0.56Vrms=1.59Vp-p=0.8Vp-o
VALC=2.5-0.8=1.7V
Since the input impedance at pin is high at 1 M
voltage by dividing resistance.
or more, it is possible to provide ALC operating
Vcc
51k
R
0.01uF
When Vcc=5V
ALC operating Voltage (dBV) Voltage applied to pin
ALC_LC (V)
+3 0.50
0 1.09
-2 1.38
-4 1.61
-6 1.79
-8 1.94
-10 2.05
2006/05/15
R2A15906SP ver.C
Resistance R ( )
5.6k
15k
20k
24k
27k
33k
36k
(11/14)
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet R2A15906SP.PDF ] | |
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