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REJ03F0057_M61520FP Schematic ( PDF Datasheet ) - ETC

Teilenummer REJ03F0057_M61520FP
Beschreibung 6ch Electronic Volume with Tone Control
Hersteller ETC
Logo ETC Logo 




Gesamt 16 Seiten
REJ03F0057_M61520FP Datasheet, Funktion
M61520FP
6ch Electronic Volume with Tone Control
REJ03F0057-0100Z
Rev.1.0
Sep.19.2003
Features
Function names
Features
Volume
Six independent high-performance independent volumes on-chip (0 to 87 dB in 1 dB steps, -)
Input selector
L/R ch: 6 inputs with muting and attenuation
REC output
Two-channel record output (one channel includes a mute switch)
Gain control
Input gain control for FL, FR, C, SL, SR, and SW channels (0/3.6 dB)
Record-input gain control (+1/+3/+4.6/+6.6 dB)
Output gain control for SL, SR and C channels (0/+6 dB)
Output gain control for the SW channel (+6/+10 dB)
Output gain control for FL and FR channels (0/+2/+6.5/+10.5 dB) *1
Microphone-mix gain control (0/-2/+6.5/+10.5 dB) *1
Bass boost
On-chip bass-boost circuits for the FL and FR channels
Balanced output
Internal balanced outputs for the ADC
Note: 1 The microphone mix gain is coupled with output gain control for the FL and FR channels.
Application
Mini-component systems, TVs, etc.
Recommended Operating Conditions
Analog power-supply voltage range: 8.0 V to 10.0 V
Digital power-supply voltage range: 3.0 V to 5.5 V
Rev.1.0, Sep.19.2003, page 1 of 15






REJ03F0057_M61520FP Datasheet, Funktion
M61520FP
Specification of Control Data
Data is fetched on rising edges of SCK; after 16 bits have been fetched, they are internally latched on the rising edge of
REQ.
DATA D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15
SCK
REQ
(All data for the ten formats must be initialized each time the power is turned on.)
D0 D1 D2 D3 D4 D5 D6
D7 D8 D9 D10 D11 D12
D13
D14 D15
A0 0 0 0
(1)
Input selector
(2)
Input ATT
(3) (4)
(5)
REC inGain FL/FR inGain SL/SR/C/SW inGain
(8)
(6) (7)
(9) (10) (11) (12)
B0 0 0 1
SW
MIC MIX/FL/FR Gain SL/SR/C Gain
PORT1 PORT2 PORT3 PORT4
Gain
(13)
PORT5
(14)
PORT6
(15) (16)
(17)
C1 0 0 0
ALL MUTE MIC MUTE REC2 MUTE
(19)
Lch volume
D1 0 0 1
E1 0 1 0
0
0
(18)
0
Bass Boost
00
(19)
Rch volume
(19)
Cch volume
Chip address
11
F1 0 1 1
0
0
0
(19)
SLch volume
G1 1 0 0
0
0
0
(19)
SRch volume
H1 1 0 1
0
0
0
(19)
SWch volume
Initial internal state of the IC (state just after power is turned on):
(1) Input selector :
MUTE
(2) Input ATT :
-8dB
(3) Record-input gain amp :
+1dB
(4) FL/FRch input gain amp :
0dB
(5) SL/SR/C/SWch input gain amp : 0dB
(6) MIC mixing gain,
FL/FR output gain amp :
0dB
(7) SL/SR/Cch output gain amp : 0dB
(8) SWch output gain amp :
+6dB
(9) OUTPUTPORT1 :
(10) OUTPUTPORT2 :
(11) OUTPUTPORT3 :
(12) OUTPUTPORT4 :
(13) OUTPUTPORT5 :
(14) OUTPUTPORT6 :
(15) Mute all :
(16) MIC MUTE :
(17) REC2 MUTE :
PORT1OFF
PORT2OFF
PORT3OFF
PORT4OFF
PORT5OFF
PORT6OFF
No muting
MUTE
THRU
(18) Bass boost: No boost
(19) LchVOL : -dB
(20) RchVOL : -dB
(21) CchVOL : -dB
(22) SLchVOL : -dB
(23) SRchVOL : -dB
(24) SWchVOL : -dB
Note: Do not input values other than those specified above. Operation is not guaranteed with other values.
Rev.1.0, Sep.19.2003, page 6 of 15

6 Page









REJ03F0057_M61520FP pdf, datenblatt
M61520FP
(5) Equivalent Circuit for the Bass-Boost Circuit
Input
+
SEL -
Switching-noise
reduction circuit
Output
G0
0dB
Positive-feedback second-order high-pass filter circuit for the bass-boost module
R1
VIN C1 C2
R2
+K
Q=4 (G=10dB)
f0
VOUT
Amplitude characteristics of the second-order high-pass filter
Q
1
2
4
5
10
G0
0 to 1dB
6dB
10dB
13dB
20dB
The transfer function is described by the following expressions:
VOUT
VIN =
s2 + s
Ks2
11
11
R2C1 + R2C2 + (1-K) R1C1 + R1R2C1C2
ωo2 =
1
R1R2C1C2
1
Q=
R1C1 + R1C2 + (1-K) R2C2
R2C2
R2C1
R1C1
The bass-boost module includes the above positive-feedback second-order high-pass filter.
In the above figure, when R1 = 1.2 k, R2 = 470 k, and C1 = C2 = 0.1 µF (K = +1),
Fo = 70 Hz (f0 = ωo/2π), Q = 10.
Rev.1.0, Sep.19.2003, page 12 of 15

12 Page





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