Mitsubishi M65850P Digital echo(digital delay) Datasheet

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M65850P/FP
50
SERIES
DIGITAL ECHO(DIGITAL DELAY)
KARAOKE
DESCRIPTION
◊ The M65850P/FP is a CMOS IC for generating echo to be added to the voice through a
"karaoke" microphone.
◊ It is optimal to provide the echo effect function for karaoke player, such as radio cassette
recorders, mini audio components and television sets.
◊ Increased master clock frequency assures high-performance short delay,enabling the IC
to be used for dolby prologic surround system.
PACKAGE
FEATURES
• Built-in input/output filters, A-D and D-A converters,and memory
realize a delay system with only a single chip.
• Built-in current control type clock oscillator circuit avoids clock
affection outside,thus allowing prevention of undesired radiation.
• Delay time = 164 ms (with master clock set at 1MHz)
(Selection of delay time in a range between 15ms and 200ms)
• Small package (14-pin DIP : 14P4,16-pin SOP:16P2N)
• Built-in 20Kbit SRAM
• Built-in auto reset circuit (The IC reset as power is turned on)
• Single power supply (5V)
Outline 1 4 P 4 ( P )
2.54mm pitch 300mil DIP
RECOMMENDED OPERATING CONDITION
Outline 1 6 P 2 N ( FP )
Supply voltage range • • • • • Vcc=3.5~5.5V
Rated supply voltage • • • • • • • • • • Vcc=5V
1.27mm pitch 300mil SOP
SYSTEM CONFIGURATION
RAM
L
HPF
VOCAL
CUT
LPF
MIC1
BASS
MIX
L
MIX
BASS
MIX
R
KEY CONTROL
HPF
R
MIX
MIC VOL
MIC AMP
MIC2
MIX
MIX
MIC VOL
ECHO
ECHO VOL
MIC AMP
M65850P/FP
Note : Dolby is the registered trademarks of dolby laboratories licensing corporation.
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M65850P/FP
50
SERIES
DIGITAL ECHO(DIGITAL DELAY)
KARAOKE
PIN CONFIGURATION
< M65850P >
1
LPF1 OUT
2
OP1 OUT
3
OP1 IN
4
CC1
5
CC2
6
GND
14
14 VCC
M 6 5 8 5 0 P
LPF1 IN
13 CLOCK
12 REF
11 OP2 IN
10 OP2 OUT
9
LPF2 IN
7
8
LPF2 OUT
NC
1
14
16
LPF1 IN
2
LPF1 OUT
3
OP1 OUT
4
OP1 IN
5
CC1
6
CC2
7
GND
8
< M65850FP >
M 6 5 8 5 0 F P
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ELECTRIC
NC
15 VCC
14 CLOCK
13 REF
12 OP2 IN
11 OP2 OUT
10 LPF2 IN
9
LPF2 OUT
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M65850P/FP
50
SERIES
DIGITAL ECHO(DIGITAL DELAY)
KARAOKE
IC INTERNAL BLOCK DIAGRAM
< M65850P >
CLOCK
13
REF 12
CC2 OP2IN OP2OUT LPF2IN LPF2OUT
6
11
10
9
8
OSCILLATOR
D / A
LPF2
1/2 Vcc
CLOCK
AUTO
RESET
DO1
RESET MAIN CONTROL
D1
MO
MI
DO0
20Kbit
SRAM
A / D
LPF1
1
2
3
4
LPF1IN LPF1OUT OP1OUT OP1IN
< M65850FP >
REF 13
CLOCK
14
5
CC1
7
14
GND VCC
CC2 OP2IN OP2OUT LPF2IN LPF2OUT
7
12
11
10
9
OSCILLATOR
D / A
LPF2
1/2 Vcc
NC 16
NC
AUTO
RESET
1
CLOCK
DO1
MO
RESET MAIN CONTROL
MI
D1
DO0
20Kbit
SRAM
A / D
LPF1
2
3
4
5
LPF1IN LPF1OUT OP1OUT OP1IN
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6
CC1
8
15
GND VCC
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M65850P/FP
50
SERIES
DIGITAL ECHO(DIGITAL DELAY)
KARAOKE
PIN DESCRIPTION
Pin No.
P
FP
1
2
Symbol
LPF1 IN
Name
I/O
Low pass filter 1
input
I
O
Function
To form input-side low pass filter by
connecting external capacitor and resistor
2
3
LPF1 OUT
Low pass filter 1
output
3
4
OP1 OUT
Operational
amplifier1 output
O
4
5
OP1 IN
Operational
amplifier 1 input
I
5
6
CC1
Current control 1
-
ADM control of A-D converter
6
7
CC2
Current control 2
-
ADM control of D-A converter
7
8
GND
GND
-
8
9
LPF2 OUT
Low pass filter 2
output
O
9
10
LPF2 IN
Low pass filter 2
input
I
10
11
OP2 OUT
Operational
amplifier 2 output
O
11
12
OP2 IN
Operational
amplifier 2 input
I
12
13
REF
Reference
-
Analog reference voltage • 1/2Vcc
13
14
CLOCK
Clock generator
input
I
To form clock generator by connecting
external resistor
14
15
VCC
Supply voltage
-
To apply 3.5 ~ 5.5 V power
(Rated voltage : 5 V)
NC
No connection
-
-
1
16
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ELECTRIC
To form A-D conversion integrator by
connecting external capacitor
To form input-side low pass filter by
connecting external capacitor and resistor
To form D-A conversion integrator by
connecting external capacitor
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M65850P/FP
50
SERIES
DIGITAL ECHO(DIGITAL DELAY)
KARAOKE
ABSOLUTE MAXIMUM RATINGS
( Ta = 25°C, unless otherwise noted )
Symbol
Parameter
Ratings
Unit
Vcc
Supply voltage
V
Circuit current
6.0
100
Icc
mA
Pd
Power dissipation
800(P),550(FP)
mW
Topr
Operating temperature
°C
Tstg
Storage temperature
-20 ~ 75
-40 ~ 125
Conditions
°C
RECOMMENDED OPERATING CONDITION
Symbol
Parameter
Vcc
fck
Supply Voltage
Conditions
Min
Limits
Typ
3.5
0.8
Clock frequency
Max
5
5.5
11.0
Unit
V
MHz
ELECTRICAL CHARACTERISTICS
(Vcc=5V,f=1kHz,Vi=100mV(rms),fck=1MHz,Ta=25°C, unless otherwise noted)
Limits
Symbol
Parameter
Icc
Circuit current
Gv
Voltage gain
Vomax
THD
No
fck
Maximum output
voltage
Total harmonic
distortion
Min
Typ
Max
Unit
5
13
25
mA
RL=47kΩ
-3.0
0
3.0
dB
THD=10%
0.7
1.0
Test conditions
No signal input
30kHz LPF
Output noise voltage DIN-AUDIO
Clock frequency
Rc=120kΩ
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0.85
V(rms)
1.2
3.0
%
-85
-70
dBV
1
1.15
MHz
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M65850P/FP
50
SERIES
DIGITAL ECHO(DIGITAL DELAY)
KARAOKE
FUNCTION DESCRIPTION
(1) Delay time Td
The delay time can be calculated by the equation :
Td=8N / fck ( N=the number of memory bits=20480 )
When fck=1MHz ( fs=125kHz), Td can be set at 164ms.
« Reference »
The M65850P/FP adopts ADM ( Adaptive Delta Modulation ) system in A-D,D-A
converters.
The sampling frequency can be calculated by the following equation :
fs=clock frequency / 8 ( Hz )
For clock frequency ( fck )=1MHz, the calculated sampling frequency is :
fs=1MHz / 8 =125kHz
(2) Clock oscillator circuit
The M65850P incorporates a current control type clock
oscillator circuit in it, thus providing circuit configuration just by
connecting a resistor for current control to pin 13 ( FP:pin 14 )
CLOCK.
Fully internal clock supply prevents occurrence of undesired
radiation without affecting any external circuit.
Vcc
Rc
Clock
oscillator
circuit
*
13
The oscillator frequency is:
fck = 1 MHz. ( Rc=120kΩ )
*
The resistor for current control can be calculated using the
following equation.
Rc • • K/Clock frequency (fck) [ Hz ]
(FP:14)
Clock
frequency : fck
K is the coefficient, and changes according to clock frequency
,as shown below.
Delay Time
( ms )
Clock Frequency
( Hz )
K value
11
15~30
11.0M~5.5M
0.8 X 10
31~100
5.3M~1.64M
1.0 X 10
101~200
1.62M~800K
1.2 X 10
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Rc ( Ω )
7.5k~15k
11
18k~62k
11
75k~150k
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MITSUBISHI SOUND PROCESSOR ICs
M65850P/FP
50
SERIES
DIGITAL ECHO(DIGITAL DELAY)
KARAOKE
(3) Input/output LPF
It is necessary to change the LPF setting ( signal pass band,fsig )
of digital echo according to the clock frequency. ( Refer to the table below )
LPF1
LPF2
REF
REF
1*
*
(FP:2)
R2
R1
2*
* (FP:3)
C2
9*
*
(FP:10)
R2
R1
R1
C1
•••
fsig=
2π
8*
C2 *(FP:9)
R1
C1
1
C1 • C2 • R1 • R2
Delay time Clock
signal pass
LPF
frequency(
Hz
)
band ( Hz ) R1( Ω ) R2 ( Ω ) C1 (F) C2 (F)
( ms )
Distortion
(Reference value)
(%)
0.2%
15~30
11.0M ~ 5.5M
7k
15k
15k
3300p 680p
31~100
5.3M ~ 1.64M
5k
13k
13k
4700p 1000p
101~200
1.62M ~ 800k
3k
16k
16k
1.2%
6800p 1500p (Td=160ms)
(Td=20ms)
0.3%
(Td=50ms)
•Test Condition is Vcc=5V,Vi=100mV(rms),f=1kHz,Ta=25°C
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M65850P/FP
50
SERIES
DIGITAL ECHO(DIGITAL DELAY)
KARAOKE
(4) Mute
When power is turned on, the mute function works automatically to
prevent noise generation. (Here, however, "mute" means the
function which prevents noise generation after the reset time.)
POWER
ON TIME
MUTE PERIOD
(ABOUT 260ms)
RESET
PERIOD
MUTE
OFF TIME
WHEN POWER IS ON (fck=1MHz)
TEST CONDITIONS
Symbol
Parameter
S1 S14
Remarks
Icc
Circuit current
2
2
No-signal time
Gv
Voltage gain between
input and output
1
1
RL=47kΩ
1
1
THD=10%
Vomax Maximum output voltage
THD
Output distortion
1
1
30kHz LPF
No
Output noise voltage
2
1
DIN-AUDIO
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M65850P/FP
DIGITAL ECHO(DIGITAL DELAY)
50
SERIES
KARAOKE
TEST CIRCUIT
< M65850P >
(2)
+
~
8
Vo
7
6
CC2
GND
LPF2 IN
LPF2 OUT
9
10
CC1
5
OP2 OUT
11
OP1 IN
4
OP2 IN
12
OP1 OUT
3
REF
LPF1 OUT CLOCK
2
VCC
1µ
1500p
LPF1 IN
14
16k
16k
1
13
120k 47µ
0.1µ
47k
6800p
+
47µ +
16k
0.068µ
S14
(1)
1500p
51 16k
1µ 16k
(2)
0.22µ 0.22µ
+
0.068µ
(1) S1
~ Vi
16k
6800p
< M65850FP >
(2)
1µ
GND
8
9
LPF2 OUT
CC2
7
10
LPF2 IN
CC1
6
11
OP2 OUT
OP1 IN
5
OP2 IN
OP1 OUT
4
REF
LPF1 OUT CLOCK
3
NC
VCC
LPF1 IN
12
1500p
2
13
+
NC
15
16
16k
16k
1
14
0.1µ
47µ +
47k
6800p
+
120k 47µ
16k
0.068µ
S14
(1)
~
Vo
1500p
51 16k
1µ 16k
(2)
0.22µ 0.22µ
0.068µ
+
(1) S1 6800p
Vi
16k
Units
Resistance : Ω
Capacitance:F
~
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M65850P/FP
50
SERIES
DIGITAL ECHO(DIGITAL DELAY)
KARAOKE
APPLICATION EXAMPLE
• ECHO Delay time 164ms (Signal pass band 3kHz)
< M65850P >
16k
0.068µ
+
16k
10
9
8
OP2 OUT
LPF2 IN
LPF2 OUT
OP1 IN
CC1
CC2
GND
4
5
6
7
REF
OP2 IN
OP1 OUT
3
12
LPF1 OUT CLOCK
11
1500p
2
14
+
LPF1 IN
VCC
1µ
16k
1
13
120k 47µ
0.1µ
47µ +
OUT
6800p
1500p
IN
16k
16k
1µ
0.22µ 0.22µ
+
16k
6800p
0.068µ
0.015µ
50k
FEEDBACK GAIN SETTING VOLUME
< M65850FP >
16k
0.068µ
+
16k
9
LPF2 OUT
GND
8
10
LPF2 IN
CC2
7
11
OP2 OUT
CC1
6
12
OP2 IN
OP1 IN
5
13
OP1 OUT
4
REF
LPF1 OUT CLOCK
3
VCC
LPF1 IN
NC
2
15
1500p
NC
16
+
1500p
IN
1µ
16k
1
14
120k 47µ
0.1µ
47µ +
1µ
OUT
6800p
16k
16k
0.22µ 0.22µ
Units
Resistance : Ω
Capacitance : F
+
0.068µ
16k
6800p
0.015µ
50k
FEEDBACK GAIN SETTING VOLUME
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M65850P/FP
50
SERIES
DIGITAL ECHO(DIGITAL DELAY)
• SURROUND
KARAOKE
Delay time 20ms ( Signal pass band 7kHz )
< M65850P >
15k
0.047µ
+
15k
15k
+
LPF2 OUT
GND
LPF2 IN
7
CC2
6
CC1
5
8
9
10
OP1 IN
4
OP2 OUT
OP1 OUT
3
OP2 IN
11
12
LPF1 OUT CLOCK
2
REF
LPF1 IN
VCC
1µ
680p
1
14
11k 47µ
13
0.1µ
47µ +
OUT
3300p
680p
IN
15k
15k
1µ
0.15µ 0.15µ
+
15k
0.047µ
3300p
< M65850FP >
15k
0.047µ
+
15k
+
LPF2 OUT
CC1
CC2
GND
6
7
8
OP2 IN
9
LPF2 IN
OP1 IN
5
10
OP2 OUT
OP1 OUT
4
12
14
LPF1 OUT CLOCK
3
REF
15
VCC
LPF1 IN
2
NC
NC
11
680p
1
16
1µ
15k
13
11k 47µ
0.1µ
47µ +
OUT
3300p
680p
IN
1µ
15k
15k
0.15µ 0.15µ
+
0.047µ
15k
Units
Resistance : Ω
Capacitance : F
3300p
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