Datasheet M62457FP Datasheet (Mitsubishi)

MITSUBISHI SOUND PROCESSOR ICs

for

spectrum analyzer displays.

• Single 5V power supply.

CD radio cassette players , mini-component stereo systems, car stereos

M62457FP

Peak hold IC for 5 band spectrum analayzer displays

DESCRIPTION

The M62457FP is 5 band peak hold ICs that use
microprocessor time division to produce serial output

FEATURES

• 5 band peak hold elements for spectrum analyzer
displays.

• Discharg time constant circuit for each band is on the
chip.

APPLICATION

RECOMMENDED OPERATING CONDITIONS

Supply voltage range • • • • 4.5 to 6.5V
Rated supply voltage • • • • 5.0V

PIN CONFIGURATION (TOP VIEW)

Vcc/2

VREF

IREF

DIFOUT

COUT

CNF

AOUT

ANF

1
2
3
4

5
6

7

16
15
14
13
12
11
10

98

GND2
PHOUT

GND1
ENB
SELC

SELB
SELA
Vcc

Outline 16P2N-A

SYSTEM BLOCK DIAGRAM

Audio
signal

BPF5

SELA

µ-com
interfac

SELB

PeaK
Hold5

SELC

SELECTOR

Peak
Hold
output

ENB

1

( / 12 )

MITSUBISHI SOUND PROCESSOR ICs

Peak hold IC for 5 band spectrum analayzer displays

PIN CONFIGURATION AND IC INTERNAL BLOCK DIAGRAM

M62457FP

Vcc/2

VREF

IREF

DIFOUT

COUT

1

2

3

4

5

Amp-C

Vcc/2 Gen.

V REF Gen.

(VCC X 0.3 )

I REF Gen.

BPF IN

Amp-D

+

+

HOLD
OUTPUT

BPF 1

BPF 2

BPF 3

SELECTEOR

P.HOLD

P.HOLD

P.HOLD

TEST

16

15

14

13

12

GND2

PHOUT

GND1

ENB

SELC

CNF

AOUT

ANF

BPF 4

6

BPF 5

P.HOLD

P.HOLD

11

SELB

<PEAK HOLD>

SELA

7

Amp-A

+

HOLD C RESET

8

10

9

Vcc

(Notes)f1=105Hz,f2=340Hz,f3=1KHz,f4=3.4KHz,f5=10.5KHz

(The value is the design value)

( / 12 )

2

MITSUBISHI SOUND PROCESSOR ICs

M62457FP

Peak hold IC for 5 band spectrum analayzer displays

Functional description

(1) Audio signal passes Amp-a and Amp-d, and it is input into BPF/peak hold

circuit for spectrum analyzer.

Basic use examples,the last output signal is input into A/D of microprocessor.
Howevwe VCC,GND of analog series had better be common with VCC,GND of
maicroprocessor. THe maicroprocessor does groundisolation to analog series.
Amp-C is the input amplifier to reject common-mode signal (noise),
it utilizes effect of common-mode rejection of Amp-D.

(2) BPF/peak hold circuit is setting of 5 band spectrum analyzer

< center frequency >

f1=105Hz
f2=340Hz
f3=1KHz
f4=3.4KHz
f5=10.5KHz

(The value is the design value)

Center frequency and Q of BPF is done general setting of like next.

w0=gm/C

gm:matual condactance of inside amplifier circuit

(It depends on outside resistor of Pin.No.3)

C:inside capacitor

Q=(R1+R2)/R1 ; it is fixed by inside resistor ratio.

(The design value is 3.5)

(3) The hold capasitor of peak hold circuit use inside capasitor.

When a selection of hold output is over the reset signal of hold value,

The reset signal is made automatically.

(Discharge pulse : -3dBtyp. output value fall)

(4) Output voltage of peak hold circuit is Vcc/2(Pin.No1)

When it is selected by the optput select circuit, it is converted into the voltage

of GND standard and outputs it in PHout (Pin.No.15).

3

( / 12 )

PIN DESCRIPTION 1

MITSUBISHI SOUND PROCESSOR ICs

M62457FP

Peak hold IC for 5 band spectrum analayzer displays

PIN No.

1
2
3
4
5
6
7
8
9

10

Name

Vcc / 2

VREF

IREF

DIFOPUT

COUT

CNF

AOUT

ANF

Vcc

SELA

I / O Function

I
I
I

O

O

I

O

I

I

I

1/2Vcc supply terminal

0.3Vcc supply terminal

BPF center frequency setting current terminal
Output of amplifier (BPF input signal )

Output of amplifier for analog COM series

Inverted input of amplifier for analog COM series

Output of amplifier for analog signal series

Inverted input of amplifier for analog signal series

System supply terminal

Output setting control terminal A ( logic input )

11

12

13

14

15

16

SELB

SELC

ENB

GND1

PHOUT

GND2

O

I

I

I

I

I

Output setting control terminal B ( logic input )

Output setting control terminal C ( logic input )

Output setting control enble terminal ( logic input )

Ground1 ( it is assumed in the voltage same as PIN16 )

Peak hold outout terminal

Ground2 ( signal series )

( / 12 )

4

PIN DESCRIPTION 2

MITSUBISHI SOUND PROCESSOR ICs

M62457FP

Peak hold IC for 5 band spectrum analayzer displays

PIN No.

1

2

3

4

5

6

7

Name

Vcc / 2

VREF

IREF

DIFOPUT

COUT

CNF

AOUT

I / O

I

I

I

O

O

I

O

Vcc

180K

1

180K

GND2

6

8

Peripheral circuit of pins

350K

2

150K

Vcc/2

Vcc/2

5

7

3

4

8

9
10
11

12
13

14

15

16

ANF

Vcc

SELA

SELB

SELC

ENB

GND1

PHOUT

GND2

O

I

I

I

I

10,11,12,13

VccX0.3

I

20K

10K

I

VccX0.3

I

10K

15

GND2

I

5

( / 12 )

ABSOLUTE MAXIMUM RATINGS

(MAXIMUM RATING)

AMBIENT TEMPERATURE Ta [ °C ]

MITSUBISHI SOUND PROCESSOR ICs

M62457FP

Peak hold IC for 5 band spectrum analayzer displays

Symbol

Vcc(max)

Pd

K

Topr

Tstg

Vi(max)

Vo(max)

Parameter

Supply Voltage

Power dissipation

Thermal derating

Operating temperature

Storage temperature

Allowable input
voltage range

Allowable output
voltage range

Conditions

Ta ≤ 25°C

Ta > 25°C

Ratings

7

540

5.4

-20 to +75

-40 to +125

GND-0.3 to Vcc+0.3

GND to Vcc

Unit

V

mW

mW/°C

°C

°C

V

V

0.6

0.5

0.4

0.3

0.2

0.1

THERMAL DERATING

0.54

0.27

0

0

25 50 75 100

125

150

6

( / 12 )

Recommended oprating conditions

( Ta=25°C unless otherwise noted )

MITSUBISHI SOUND PROCESSOR ICs

M62457FP

Peak hold IC for 5 band spectrum analayzer displays

Parameter

Supply voltage

Logic input H
level voltage

Logic input L
level voltage

Symbol

Vcc

VIH

VIL

Conditions

Vcc=5V

Vcc=5V

MIN

4.5 5.0

2.5

GND

TYP

(Note1)

The center frequency characteristics of BPF are determined by the
resistor connected between 3PIN terminal and GND.If it is necess­ary,use a variable resistor (note:all band will shift together).

Q of BPF is fixed in 3.5 by inside circuit.

MAX

6.5

VCC

0.5

Unit

V

V

V

(note 2)

The output resistor of peak hold output(PIN 15) is 10KΩtyp.

You do the input resistor of microprocessor side in a value fully big
for 10KΩ.

(note 3)

Set up as the control voltage from a microprocessor during GND-0.3V

and 5V.
If the voltage of tolerance outside is added, conserve it resistance
or diode.

( / 12 )

7

Output select logic table

MITSUBISHI SOUND PROCESSOR ICs

M62457FP

Peak hold IC for 5 band spectrum analayzer displays

PHout
(PinNo.15)

GND(output stop)

GND

f1 ; 105Hz
f2 ; 340Hz

GND

f3 ; 1KHz

GND

f4 ; 3.4KHz

f5 ; 10.5KHz

ENB

0

1

1

1

1 0

1

1

1

SELA

X

0

0

01 1

0

1

1

1

1 1 1

SELB

X

0

0

1

0

0 1

1

SELC

X

0

1

0

1

0

Note

Don`t Care

< Note1 >

”0”=low level,”1”=high level,”X”=”0”or ”1”

< Note2 >

you hold the output setting stare by more than 30µSec for a long time
(When the output setting stare is short, movement of output value and reset
signal become instable )

PHout

fn SELECT
(inside signal)

fn RESET
(inside signal)

< Outbreak automatic by inside circuit .>

90%

Ts(30µSec.MAX)

< SELECT state >

Tr(25µSec.TYP)

( / 12 )

8

Timing chart

H

MITSUBISHI SOUND PROCESSOR ICs

M62457FP

Peak hold IC for 5 band spectrum analayzer displays

ENB

SELA

SELB

SELC

PH OUT

GND

f1 RESET
(105Hz)

L

H

X

L

H

X

L

H

X

L

f1

H

L

f2

f3

f4

f5

X

X

X

f2 RESET
(340Hz)

f3 RESET
(1KHz)

f4 RESET
(3.4KHz)

f5 RESET
(10.5KHZ)

H

L

H

L

H

L

H

L

( / 12 )

9

Parameter

Condition

Maximum output level

Output offset voltage

Vo

Vos

Unit

Limis

Min

mA

3.5

V

50dB25

Output response time

Discharge level

1.03020dB1.70

0.5132.7

µsec

60

-3

f2 output level

f3 output level

f4 output level

f5 output level

VIL

2.5

5.000.5VV

+0.3

-0.3

CMRR

Vo1

Vo2

Vo3

Vo4

Vo5VVVVV0.5

0.5

0.5

0.5

1.0

1.0

1.0

1.0

1.70

1.70

1.70

1.70TsDS

ELECTRICAL CHARACTERISTICS

(Ta=25°C, Vcc=5.0V,PHout(Pin.No.15) RL=1MΩ unless otherwise noted.

VAIN=-30dBV, f=1KHz,ENB(Pin.No.13)=1)

MITSUBISHI SOUND PROCESSOR ICs

M62457FP

Peak hold IC for 5 band spectrum analayzer displays

Logic input H level

Logic input L level

Common-mode rejection ratio

f1 output level

Symbol

IccCircuit current

VIH

No signal, No select
(ENB,SELA,SELB,SELC=0)

f1 to f5 Measured at each output
(VAIN= -14dBV)

f1 to f5 Measured at each output
(No signal,ENB=0/1)

f1 (fin=105Hz)

GND

typ

8

30

Max

mV

Vcc

f2 (fin=340Hz)
f3 (fin=1KHz)

f4 (fin=3.4KHz)
f5 (fin=10.5KHz)

The time from the rise of output
selection until the rise of
PHout(90% of peak)

< Reference >

Inside reset signal

Tr=25µsecTYP

( / 12 )

10

TEST CIRCUIT

MITSUBISHI SOUND PROCESSOR ICs

M62457FP

Peak hold IC for 5 band spectrum analayzer displays

IN

0.1µ

0.1µ

100K

DIFOUT

0.47

VREF

100K

39K

Vcc/2

IREF

1

2

3

4

COUT

5

CNF

6

Amp-C

Vcc/2 Gen.

V REF Gen. SELECTEOR

(Vccx0.3)

I REF Gen.

HOLD
OUTPUT

BPF IN

BPF 1

Amp-D

+

BPF 2

BPF 3

+

BPF 4

BPF 5

P.HOLD

P.HOLD

P.HOLD

P.HOLD

P.HOLD

16

15

14

13
ENB

12

SELC

11

SELB

GND2

PHOUT

1M

GND1

Px4

Px3

Px2

AIN

0.47µ

100K

39K

AOUT

7

ANF

8

Amp-A

+

<PEAK HOLD>

HOLD C RESET

10

SELA

9

0.01µ

Units resistance; Ω

capacitance; F

Px1

Vcc

11

( / 12 )

10µ

APPLICATION EXAMPLE

MITSUBISHI SOUND PROCESSOR ICs

M62457FP

Peak hold IC for 5 band spectrum analayzer displays

COM

0.1µ

0.1µ

DIFOUT

0.47µ

VREF

IREF

100K

100K

270K/2

Vcc/2

1

2

3

4

COUT

5

CNF

6

Amp-C

Vcc/2 Gen.

V REF Gen.

(Vccx0.3)

I REF Gen.

BPF IN

Amp-D

+

+

BPF 1

BPF 2

BPF 3

BPF 4

BPF 5

HOLD
OUTPUT

P.HOLD

P.HOLD

P.HOLD

P.HOLD

P.HOLD

SELECTEOR

16

15

14

GND1

13

ENB

12

SELC

11

SELB

GND2

PHOUT

A/D

Px4

Px3

MCU

Px2

CH1

CH2

0.047µ

0.047µ

100K

270K

270K

AOUT

7

ANF

8

Amp-A

+

<PEAK HOLD>

HOLD C RESET

0.01µ

Units resistance; Ω

capacitance; F

10

SELA

9

( / 12 )12

Px1

Vcc

10µ