Datasheet AN7500FHQ Datasheet (Panasonic)

ICs for Radio-Cassette, Cassette Deck

AN7500FHQ

Audio signal processing IC for 1.5 V headphone stereo

■ Overview

The AN7500FHQ is a single chip IC optimum for a

1.5 V headphone stereo system including pre-amp., power
amp. and Dolby B type noise reduction circuit. Current
consumption in a Dolby circuit off mode has been drasti­cally reduced and an operating supply voltage has also
been lowered to 0.98 V. Much fewer external components
have been realized due to an integration of audio signal
processing system into a single chip circuitry in a small
outline package and space saving mounting of a set.

■ Features

• Reduction by power consumption of approximately 35%

as compared with conventional products, contributing
to low power consumption of a set.

• Eliminating the DC/DC converter so far needed for con-

ventional system due to 1.5 V single power supply, and
reducing approx. 40% of external components. This
contributes to space saving in a set.

• Built-in standby switch to reduce consumption current

considerably.

■ Applications

• Headphone stereo

36 25

37

1

(0.75)

9.00±0.40

7.00±0.20

12

0.50

0.20

Seating plane

LQFP048-P-0707

+0.10
–0.05

24

1348

(0.75)

7.00±0.20

1.40±0.10

(0.625)(0.625)

0.10±0.10

Unit: mm

9.00±0.40

–0.05

+0.10

1.70 max.

0.15

(1.00)

0° to 10°

0.50±0.20

1

AN7500FHQ ICs for Radio-Cassette, Cassette Deck

■ Block Diagram

REF

N.R. in (L)

36

35

I

34

N.R. out (L)

33

32

31

30

SB out (L)

29

28

PWR in (L)

27

26

PWR in (R)

25

PB out (L)

REV in (L)

FWD in (L)

V

REF

FWD in (R)

REV in (R)

PB out (R)

37

38

39

40

25 kΩ 200 kΩ

41
42

43

Bias

44

45

25 kΩ

46

200 kΩ

47

48

N.R.

FWD

REV

On Off

mute

1

160 Ω

24

86 kΩ

100 kΩ

V

REF

V

REF

23

22

21

PWR out (R)

20

V

CC

19

GND

18

PWR out (L)

17

AGC

16

Ripple

filter

V

V

REF

REF

15

14

100 kΩ

86 kΩ

Control

13

STBY

160 Ω

2

3

4

5

6

7

8

9

10

11

12

ASC

N.R. in (R)

N.R. out (R)

SB out (R)

Low BST

Power mute

2

ICs for Radio-Cassette, Cassette Deck AN7500FHQ

■ Pin Descriptions

Pin No. Description

1 FWD/REV/pre-mute control
2 Noise reduction on/off control
3 N.R. decoder input (R)
4 N.R. decoder output (R)
5 Side-chain filter (R)
6 Weighting amp. filter (R)
7 Control voltage ripple filter (R)
8 Sub-buffer amp. output (R)

9 Sub-buffer amp. input (R)
10 Sub-buffer amp. on/off control
11 Low boost on/off control
12 Power mute on/off control
13 Standby on/off control
14 Ripple filter input
15 Ripple filter base pin
16 Ripple filter output
17 AGC time constant
18 Power output (L)
19 GND pin
20 Positive power supply
21 Power output (R)
22 Low boost capacitor pin 2
23 LPF2 capacitor pin
24 Low boost capacitor pin 1

Pin No. Description

25 Power input (R)
26 LPF1 capacitor pin
27 Power input (L)
28 Sub-buffer amp. input (L)
29 Sub-buffer amp. output (L)
30 Control voltage ripple filter (L)
31 Weighting amp. filter (L)
32 Side-chain filter (L)
33 N.R. decoder output (L)
34 N.R. decoder input (L)
35 Reference current resistance pin
36 MS LPF C pin
37 MS output
38 MS filter pin
39 Playback amp. output (L)
40 Playback amp. negative feedback input (L)
41 Playback amp. REV input (L)
42 Playback amp. FWD input (L)
43 Reference voltage output
44 Playback amp. FWD input (R)
45 Playback amp. REV input (R)
46 Playback amp. negative feedback input (R)
47 Playback amp. output (R)
48 Reference voltage input

■ Absolute Maximum Ratings

Parameter Symbol Rating Unit

Supply voltage V
Supply current I

2

Power dissipation
Operating ambient temperature
Storage temperature

Note)*1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25°C.

2: Ta = 75°C

*

*

1

*

1

*

CC

CC

P

D

T

opr

T

stg

2.1 V
20 mA

249 mW

−20 to +70 °C

−55 to +125 °C

3

AN7500FHQ ICs for Radio-Cassette, Cassette Deck

■ Recommended Operating Range

Parameter Symbol Range Unit

Supply voltage V

Note)*: Supply voltage of VCC of 0.95 V to 0.98 V is permissible as long as it does not cause any abnormal operation such as oscillation.

CC

■ Electrical Characteristics at VCC = 1.2 V, f = 1 kHz, RL = 32, Ta = 25°C

Parameter Symbol Conditions Min Typ Max Unit

Voltage gain G
Circuit current 1 I

Circuit current 2 I

Circuit current 3 I
Circuit current 4 I

Circuit current 5 I

Pre-amp. block

Open-loop voltage gain G
Close-loop voltage gain G
Max. output voltage

V

omax(PB)

Total harmonic distortion THD

Output noise voltage V
Channel separation CS

FWD/REV crosstalk CT

Ripple rejection factor RR

Mute attenuation amount

G

MUTE(PB)

Heavy low sound + power amp. block

Gain voltage 1 G
Gain voltage 2 G
Low frequency boost amount G

Rated output power P
Total harmonic distortion THD
Channel separation 1 CS1

VO = −22.2 dBV 54 57 60 dB

V

VIN = 0, Rg = 2.2 kΩ,  3.2 5.9 mA

CC1

L. BST off, N.R. off
VIN = 0, Rg = 2.2 kΩ,  4.4 7.1 mA

CC2

L. BST off, N.R. on

CC3Pout

CC4Pout

= 0.5 mW × 2-ch., RL = 32 Ω7.0 11.2 mA
= 0.5 mW × 2-ch.,  8.4 12.8 mA

RL = 32 Ω, N.R. on
STBY on  15 30 µA

CC5

VO(PB)VO

VC(PB)VO

= −22.2 dBV 61 73  dB
= −22.2 dBV 32.5 34 35.5 dB

THD = 1%, 30 kHz, LPF on 120 210  mV

= −22.2 dBV, 30 kHz, LPF on,  0.2 0.6 %

(PB)VO

GVC = 35 dB (NAB)

NO(PB)Rg

(PB)

= 2.2 kΩ, IHF-A −90 −76 dBV

Sincgle ch. input, 1 kHz, BPF on, 37 46  dB
Rg = 2.2 kΩ, VO = −22.2 dBV

Single ch. input, 1 kHz, BPF on, 51 59  dB

(PB)

Rg = 2.2 kΩ, VO = −22.2 dBV

(PB)Rg

= 2.2 kΩ, VRR = −32.2 dBV, 43 53  dB

f

= 100 Hz, I

RR

RFO

BPF: 100 Hz, 1/4 OCT
Ratio to VO = −22.2 dBV, −85 −70 dB

pre-mute on

V1(PW)VO

V2(PW)

V3(PW)

= −22.2 dBV 21 23 25 dB

L. boost on, VO = −22.2 dBV 21.4 23.4 25.4 dB
L. boost on/off, 15 19 23 dB

f = 50 Hz, VIN = 65.2 dBV
THD = 10%, 30 kHz, LPF on 2.5 4.5  mW

out

(PW)Pout

(PW)

= 1 mW, 30 kHz, LPF on  0.35 1.3 %

Sincgle ch. input, 1 kHz, BPF, 33 40  dB
Rg = 0, VO = −22.2 dBV

0.98 * to typ. 1.2 to 2.0 V

= 15 mA,

4

ICs for Radio-Cassette, Cassette Deck AN7500FHQ

■ Electrical Characteristics at VCC = 1.2 V, f = 1 kHz, RL = 32, Ta = 25°C (continued)

Parameter Symbol Conditions Min Typ Max Unit

Heavy low sound + power amp. block (continued)

Channel separation 2 CS2

Output noise voltage 1
Output noise voltage 2

V

NO1(PW)Rg

V

NO2(PW)

Ripple rejection factor 1 RR1

Ripple rejection factor 2 RR2

Input resistance R
Channel balance CB
Mute output voltage

V

MUTE(PW)VIN

AGC level V

Output DC step DV

Dolby block

1

Reference input level

*

V

Channel balance CB

2

N.R. decode characteristics 1

N.R. decode characteristics 2

N.R. decode characteristics 3

N.R. decode characteristics 4

N.R. decode characteristics 5

Note)*1: Adjust an input level to get an output level of −3.2 dBV at a measuring point (N.R. out) so that you can get 0 dB of reference

input level.

2: VO in the calculating equation is the output level based on reference of 0 dB = −32.2 dBV (measuring point: N.R. out).

*

*

G

2

*

G

2

*

G

2

*

G

2

*

G

Sincgle ch. input, Low boost on, 25 31  dB

(PW)

Rg = 0, VO = −22.2 dBV, 1 kHz, BPF

= 0, IHF-A −91 −86 dBV

Low boost on, Rg = 0, IHF-A −86 −82 dBV

= 0, VRR = −32.2 dBV, 60 72  dB

(PW)Rg

fRR = 100 Hz, I

= 15 mA,

RFO

BPF: 100 Hz, 1/4 OCT
Low boost on, Rg = 0, 40 61  dB

(PW)

V

= −32.2 dBV, fRR = 100 Hz,

RR

I

= 15 mA, BPF: 100 Hz, 1/4 OCT

RFO

IN(PW)

(PW)VO

= −22.2 dBV −1.5 0 1.5 dB

7.2 9.5 12 kΩ

= −32.2 dBV −96 −90 dBV

AGCVIN

= −45.2 dBV, f = 100 Hz, −17.3 −14.7 −13.1 dBV

R

= 32 Ω,

L

AGC level to be measured at 32 Ω end.
PWR mute (pin 12) on/off −30 0 30 mV

(PW)

N.R.: Off, BEF: Off, f = 1 kHz, −33.9 −32.8 −31.7 dBV

IN(NR)

VO = −32.2 dBV
(Calculation) channel ratio of the above −10 1 dB

(NR)

V

IN

N.R.: On, BEF: Off, f = 10 kHz, −20 2 dB

(NRD1)

V

= −29.6 dB,

IN

Calculation NRD = VO +40 (dB)
N.R.: On, BEF: Off, f = 1 kHz, −20 2 dB

(NRD2)

VIN = −23.9 dB,
Calculation NRD = VO +30 (dB)

N.R.: On, BEF: Off, f = 1 kHz, −3.0 0 3.0 dB

(NRD3)

V

= −15.8 dB

IN

Calculation NRD = VO +20 (dB)
N.R.: On, BEF: Off, f = 10 kHz, −2.5 0 2.5 dB

(NRD4)

V

= −17.4 dB

IN

Calculation NRD = VO +20 (dB)
N.R.: On, BEF: Off, f = 10 kHz, −20 2 dB

(NRD5)

VIN = 0.4 dB,
Calculation NRD = VO (dB)

5

AN7500FHQ ICs for Radio-Cassette, Cassette Deck

■ Electrical Characteristics at VCC = 1.2 V, f = 1 kHz, RL = 32, Ta = 25°C (continued)

Parameter Symbol Conditions Min Typ Max Unit

Dolby block (continued)

3

*

Total harmonic distortion 1

Total harmonic distortion 2

Total harmonic distortion 3

THD1

3

*

THD2

3

*

THD3

(Signal handling) V

4

Signal to noise ratio, N.R. on

Sub-buffer filter characteristic

*

V

5

*

G

Ripple filter block

Ripple rejection factor RR V

DC output voltage V

Bias block

DC output voltage V

AMS block

Music detection level 1 V
Music detection level 2 V

Control block

Standby-off voltage V
Standby-on voltage V
Standby pin current I
Power mute-on threshold V
Power mute-off threshold V
Power mute pin current I
FWD/REV/pre-mute low threshold
FWD/REV/pre-mute high threshold

V

V
FWD/REV/pre-mute pin current I
Low-boost on threshold V
Low-boost pin current I
N.R. on threshold V
N.R. off threshold V

Note)*3: Measuring point: SB out

4: Measuring point: N.R. out

*

5: Attenuation amount referred to sub-buffer off (measuring point: SB out).

*

N.R.: Off, BEF: On, f = 1 kHz,  0.2 0.5 %

(NR)

VIN = +10 dB, 30 kHz, LPF on
N.R.: On, BEF: Off, f = 1 kHz,  0.3 0.8 %

(NR)

VIN = +10 dB, 30 kHz, LPF on
N.R.: On, BEF: Off, f = 1 kHz,  0.3 1 %

(NR)

= +12 dB

IN

VCC = 1.1 V, 30 kHz, LPF on
N.R.: On, BEF: Off, 70 72  dB

NO(NR)

Input pin R

= 15 kΩ,

g

CCIR/ARM filter
N.R.: Off, BEF: On/off, f = 6.3 kHz, −12 −8dB

VOP2

VIN = 0 dB

= 1.1 V, VRR = −32.2 dBV 24 30  dB

CC

f

= 100 Hz, I

RR

= 15 mA

RFO

BPF: 100 Hz, 1/4 OCT

RPFVCC

REFVCC

BS

MS

STOFF

STON

STBYV13

MTON

MTOFF

SW12V12

TH1L

TH1H

SW1V1

LBON

SW11V11

NRON

NROFF

= 1.0 V, I

= 1.0 V 0.68 0.76 0.83 V

Power mute on, at V37 = 0.6 V[p-0] −50.6 −49 −47.4 dBV
Power mute off, at V37 = 0.6 V[p-0] −66.6 −65 −63.4 dBV

Low: Power on 0.4 V
High/open: Power off 0.75  V

= 0 V  16 45 µA
Low: Power mute on 0.3 V
High/open: Power mute off 1.05  V

= 0.1 V  20 40 µA
Low: REV 0.1 V
High: Pre-mute on 1.1  V

= 0.1 V  918µA

Low: Low boost on 0.3 V

= 0.1 V  20 40 µA
Low: N.R. on 0.4 V
High/open : N.R. off 0.8  V

= 15 mA 0.89 0.94  V

RFO

6

ICs for Radio-Cassette, Cassette Deck AN7500FHQ

■ Electrical Characteristics at VCC = 1.2 V, f = 1 kHz, RL = 32, Ta = 25°C (continued)

Parameter Symbol Conditions Min Typ Max Unit

Control block (continued)

N.R. pin current I
Sub-buffer on threshold V
Sub-buffer off threshold V
Sub-buffer pin current I

■ Terminal Equivalent Circuits

V2 = 0.1 V  816µA

SW2

Low: SB on 0.4 V

SBON

High/open: SB off 0.8  V

SBOFF

SW10V10

= 0.1 V  20 40 µA

Pin No. Equivalent circuit Description

1 FWD/REV/pre-mute: 

120 kΩ

1

V

RPF

FWD/REV/pre-mute control
Pre-mute

High voltage: V

CC− 0.1

< V

1-19

Waveform/voltage

(at VCC = 1.2 V)

FWD

Pin open

120 kΩ

REV

Low voltage: V

1-19

< 0.1

GND

2 N.R. cont.: RIN = 33 kΩ

Approx.
2 µA

2

200 Ω

100kΩ100

100 kΩ

kΩ

V

RPF

N.R. on/off control 0.8 V
N.R. off

Pin open or high voltage:

0.8 V < V

< VCC +0.3 V

2-19

N.R. on

Low voltage:

− 0.3 V < V

2-19

< 0.4 V

GND

3 Pin 3: N.R. in (R)

V

34 Pin 34: N.R. in (L):

RPF

V

REF

N.R. decoder input

Pin 3

34

30 kΩ

= 30 kΩ (typ.)

R

IN

50 kΩ

DC 0.78 V

GND

7

AN7500FHQ ICs for Radio-Cassette, Cassette Deck

■ Terminal Equivalent Circuits (continued)

Pin No. Equivalent circuit Description

4 Pin 4: N.R. out (R) R

V

33 Pin 33: N.R. out (L): DC 0.78 V

V

REF

RPF

N.R. decoder output

Waveform/voltage

(at VCC = 1.2 V)

= 300 Ω (typ.)

O

6.7 kΩ

Pin 4

33

11.6 kΩ

7.5 kΩ

GND

5 Pin 5: SC in (R) RIN:

V

32 Pin 32: SC in (L): to inpuit signal

V

REF

Pin 5

32

200

Ω

EVR

RPF

Side chain input DC 0.78 V

Variable according

GND

6 Pin 6: WAMP (R) DC 0.78 V

V

31 Pin 31: WAMP (L):

Pin 6

31

V

REF

270 Ω

RPF

Weighting amp. filter pin

GND

7 Pin 7: VC LPF (R) 0 V

30 Pin 30: VC LPF (L): (Add external resistor

V

RPF

Control voltage ripple filter pin without signal)

Pin 7

30

GND

8

ICs for Radio-Cassette, Cassette Deck AN7500FHQ

■ Terminal Equivalent Circuits (continued)

Pin No. Equivalent circuit Description

8 Pin 8: SB out (R) At SB on

29 Pin 29: SB out (L): R

V

REF

100 kΩ

Pin 8

29

160 Ω

V

RPF

Sub-buffer amp. output At SB off
When pin 10 is open or of high R
voltage and output is connected to DC 0.78 V
V

with 100 kΩ, the buffer amp.

REF

Waveform/voltage

(at VCC = 1.2 V)

= 160 Ω (typ.)

O

= 100 kΩ (typ.)

IN

does not operate.

GND

9 Pin 9: SB in (R) RIN = 86 kΩ (typ.)

28 Pin 28: SB in (L): DC 0.78 V

V

REF

V

RPF

Sub-buffer amp. input

86

kΩ

Pin 9

28

GND

10 SB CNT: RIN = 6 kΩ

50 kΩ

V

RPF

Sub-buffer amp. on/off control DC 0.78 V
SB off

Pin open or high voltage:

10

20 kΩ

20 kΩ

20 kΩ

0.8 V < V

SB on

Low voltage:

− 0.3 V < V

< VCC +0.3 V

10-19

< 0.4 V

10-19

GND

11 L-BST CNT: DC 0 V

V

RPF

Low boost on/off control

11

50 kΩ

10 kΩ

50 kΩ

L-BST on

Pin open

L-BST off

Low voltage:

− 0.3 V < V

10-19

< 0.3 V

GND

9

AN7500FHQ ICs for Radio-Cassette, Cassette Deck

■ Terminal Equivalent Circuits (continued)

Pin No. Equivalent circuit Description

12 PWR mute CNT: DC 0 V

V

RPF

Power mute on/off control

12

50 kΩ

PWR-mute off

Pin open or high voltage:
VCC − 0.15 V < V

12-19

< VCC +0.3 V

PWR-mute on

50 kΩ

Low voltage:

− 0.3 V < V

12-19

< 0.3 V

GND

13 STBY CNT: DC 0 V

V

RPF

Standby on/off control
STBY off

100

kΩ

13

Pin open or high voltage:

0.75 V < V

< VCC +0.3 V

13-19

STBY (on state) on

100 kΩ

Low voltage:

− 0.3 V < V

13-19

< 0.4 V

GND

Waveform/voltage

(at VCC = 1.2 V)

14 RF in: DC 1.0 V

70 kΩ

14

V

CC

Ripple filter reference voltage input

14 kΩ

15 RF base: DC 0.47 V

350 kΩ

100 kΩ

Ripple filter

GND

16 V

15

: DC 1.13 V

RPF

Ripple filter reference voltage output

16

10

ICs for Radio-Cassette, Cassette Deck AN7500FHQ

■ Terminal Equivalent Circuits (continued)

Pin No. Equivalent circuit Description

17 AGC TAU: 

17

V

RPF

AGC time constant

Waveform/voltage

(at VCC = 1.2 V)

GND

18 Pin 18: PWR out (L)
21 Pin 21: PWR out (R):

60 kΩ

Pin 18

21

4 kΩ

V

CC

Power amp. voltage output

DC 0.6 V

GND

19  GND pin 0 V
20  VCC power supply pin 1.2 V
22 L-BST C:

15 kΩ

V

RPF

Low boost capacitor pin

7.5 kΩ

22

7.5 kΩ

V

REF

15 kΩ

GND

23 LPF2-C:

45 kΩ

V

RPF

LPF2 capacitor pin

15 kΩ

23

7.5
kΩ

V

REF

GND

DC 0.78 V

DC 0.78 V

11

AN7500FHQ ICs for Radio-Cassette, Cassette Deck

■ Terminal Equivalent Circuits (continued)

Pin No. Equivalent circuit Description

24 L-BST C1:

3 kΩ

24

30

kΩ

V

REF

30 kΩ

3 kΩ

V

RPF

Low boost capacitor pin

GND

25 Pin 25: PWR in (R)

V

27 Pin 27: PWR in (L):

RPF

Power amp. input

2 kΩ

12 kΩ

V

REF

GND

LPF capacitor pin

25

90 kΩ

10 kΩ

V

REF

V

RPF

26 LPF1-C:

90 kΩ

27

10 kΩ

Waveform/voltage

(at VCC = 1.2 V)

DC 0.78 V

DC 0.78 V
AC −30 dBm

GND

V

RPF

26

GND

35 I

35

V

GND

12

: DC 0.1 V

RPF

REF

Reference current resistor pin

DC 0.78 V

ICs for Radio-Cassette, Cassette Deck AN7500FHQ

■ Terminal Equivalent Circuits (continued)

Pin No. Equivalent circuit Description

Waveform/voltage

(at VCC = 1.2 V)

36 MS LPF-C: 

V

RPF

Music interval detection LPF capa-

10 kΩ

36

citor pin

5.7 kΩ

GND

37 MS out:

V

CC

37

Music interval detection output

400 kΩ

GND

38 MS-C: DC 0.78 V

V

RPF

Music interval detection filter capa-

180 kΩ

citor pin

180 kΩ

38

180 kΩ

V

REF

180 kΩ

GND

13

AN7500FHQ ICs for Radio-Cassette, Cassette Deck

■ Terminal Equivalent Circuits (continued)

Pin No. Equivalent circuit Description

39 Pin 39: PB out (L)
47 Pin 47: PB out (R):

V

CC

Playback amp. output

Pin 39

47

GND

40 Pin 40: PB NF (L)
46 Pin 46: PB NF (R):

V

CC

Playback amp. negative feedback
input

Pin 40

46

GND

41 Pin 41: REV in (L)
45 Pin 45: REV in (R):

Playback amp. REV input

Waveform/voltage

(at VCC = 1.2 V)

DC 0.6 V
AC −30 dBm

DC 0.78 V
1 kHz −65 dBm

V

CC

42 Pin 42: FWD in (L)
44 Pin 44: FWD in (R):

Playback amp. FWD input

Pin 41

42
44
45

V

25 kΩ

REF

200 kΩ

GND

14

DC 0.78 V
AC −65 dBm

ICs for Radio-Cassette, Cassette Deck AN7500FHQ

■ Terminal Equivalent Circuits (continued)

Pin No. Equivalent circuit Description

43 V

V

RPF

43

: DC 0.78 V

REF

Reference voltage output

GND

48 V

V

RPF

48

in: DC 0.78 V

REF

Reference voltage input

GND

Waveform/voltage

(at VCC = 1.2 V)

15

AN7500FHQ ICs for Radio-Cassette, Cassette Deck

■ Application Circuit Example

PB out (L)

0.022 µF

180 Ω

REV in (L)

FWD in (L)

V

REF

FWD in (R)

REV in (R)

180 Ω

0.022 µF

PB out (R)

0.047 µF

33 µF

22 µF

33 µF

1 µF

6.8
kΩ

1 µF

1 µF

1 µF

1 µF

6.8
kΩ

1 µF

2.2 µF

36

37

38

39

40

25 kΩ 200 kΩ

41

42

43

Bias

44

45

25 kΩ

46

200 kΩ

47

48

N.R.

FWD

REV

On Off

mute

1

N.R. in (L)

N.R. out (L)

0.33 µF

REF

I

3 300 pF

1 µF

10 kΩ

35

34

33

1 µF

0.01 µF

32

31

390 kΩ

15 kΩ

2 700 pF

30

29

160 Ω

2.2 kΩ

0.01

µF

PWR in (L)

SB out (L)

28

PWR in (R)

1 µF

27

1 µF

0.1 µF

26

25

6.8 µF

24

86 kΩ

0.15 µF

Ripple

filter

23

22

21

20

19

18

17

16

15

14

6.8 µF

0.1 µF

100 µF

100 µF

0.1 µF

0.047 µF

33 µF

2.2 Ω

PWR out (R)

GND

PWR out (L)

2.2 Ω

22 µF

2SB1295

32 Ω

V

32 Ω

CC

100 kΩ

V

REF

V

REF

AGC

V

V

REF

REF

100 kΩ

On

Off

STBY

86 kΩ

Control

13

160 Ω

2

3

4

5

6

7

8

9

10

11

12

Mute

V

CC

FWD

REV

Off

On

1 µF

1 µF

N.R. in (R)

N.R. out (R)

3 300 pF

15 kΩ

0.01 µF

0.33 µF

1 µF

2 700 pF

0.01 µF

390 kΩ

2.2 kΩ

SB out (R)

Off

On

On

ASC

Note) Dolby and double D logos are the trademarks of Dolby Laboratories Licensing Corporation.

The use of this product requires the prior approval of Dolby Laboratories Licensing Corporation.

16

Off

Low BST

Off

On

Power mute