LC75341M_技术文档

Ordering number : ENN*6270

CMOS IC

LC75341, 75341M

Single-Chip Volume and Tone Control System

Preliminary

Overview

Package Dimensions

The LC75341 and LC75341M are electronic volume and

tone control systems that provide volume, balance, a 2-

band equalizer, and input switching functions that can be

controlled from serially transferred data.

unit: mm

3067-DIP24S

[LC75341]

24

13

Functions

• Volume: 0 dB to –79 dB (in 1-dB steps) and –∞, for a

total of 81 settings.

The volume can be controlled independently in the left

and right channels to implement a balance function.

• Bass boost: Up to +20 dB in 2-dB steps. Peaking

characteristics.

1

12

21.2

• Treble: ±10 dB in 2-dB steps. Shelving characteristics.

• Selector: One of four sets of left/right inputs can be

selected.

• Input gain: The input signal can be boosted by from

0 dB to +30 dB in 2-dB steps.

0.48

0.81

1.78

0.95

SANYO: DIP24S

unit: mm

3112-MFP24S

Features

[LC75341M]

• On-chip buffer amplifiers minimize the number of

external components.

24

13

• Fabricated in a silicon gate CMOS process to minimize

switching noise from internal switches.

• Built-in analog ground reference voltage generation

circuit.

• All controls can be set from serially transferred data.

Supports the CCB standard.

1

12

0.15

12.6

0.35

1.0 0.8

SANYO: MFP24S

•

CCB is a trademark of SANYO ELECTRIC CO., LTD.

CCB is a SANYO’s original bus format and all the

bus addresses are controlled by SANYO.

Any and all SANYO products described or contained herein do not have specifications that can handle

applications that require extremely high levels of reliability, such as life-support systems, aircraft’s

control systems, or other applications whose failure can be reasonably expected to result in serious

physical and/or material damage. Consult with your SANYO representative nearest you before using

any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other

parameters) listed in products specifications of any and all SANYO products described or contained

herein.

SANYO Electric Co.,Ltd. Semiconductor Company

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

D2499RM (OT) No. 6270-1/20

LC75341, 75341M

Specifications

Absolute Maximum Ratings at Ta = 25°C, V = 0 V

SS

Parameter

Maximum supply voltage

Symbol

Conditions

Ratings

Unit

V

V_DDmax

V_DD

11

CE, DI, CL, L1 to L4,

R1 to R4, LIN, RIN

Maximum input voltage

V_INmax

V_SS– 0.3 to V_DD+ 0.3

V

Ta ≤ 75°C

LC75341

450

Allowable power dissipation

Pdmax

mW

Ta ≤ 75°C

with a PCB*

LC75341M

Operating temperature

Storage temperature

Topr

Tstg

–30 to +75

°C

–40 to +125

Note: * Printed circuit board size: 76.1 × 114.3 × 1.6 mm, printed circuit board material: glass/epoxy resin

Allowable Operating Ranges at Ta = –30 to +75°C, V = 0 V

SS

Ratings

Parameter

Symbol

Conditions

Unit

min

5.0

typ

max

Supply voltage

V_DD

V_IH

V_DD

10

V

High-level input voltage

CL, DI, CE

2.7

V_SS

7.5 ≤ V_DD≤ 10.0

5.0 ≤ V_DD< 7.5

1.0

0.8

Low-level input voltage

V_IL

V_IN

CL, DI, CE

V

CE, DI, CL, L1 to L4,

R1 to R4, LIN, RIN

Input voltage amplitude

V_SS

V_DD

Vp-p

Input pulse width

Setup time

tøW

tsetup

thold

fopg

CL

1

µs

CL, DI, CE

CL

Hold time

µs

Operating frequency

500

kHz

Electrical Characteristics at Ta = 25°C, V = 9 V, V = 0 V

DD

SS

Input Block

Ratings

typ

Parameter

Symbol

Conditions

Unit

min

max

Maximum input gain

Step resolution

Gin max

Gstep

+30

dB

+2

L1, L2, L3, L4

Input resistance

Rin

50

kΩ

R1, R2, R3, R4

LSEL0, RSEL0

Clipping level

Vcl

Rl

THD = 1.0%, f = 1 kHz

2.90

Vrms

Output load resistance

10

kΩ

Volume Control Block

Ratings

typ

Parameter

Symbol

Rin

Conditions

Unit

min

max

Input resistance

L_IN, R_IN

50

kΩ

Bass Band Equalizer Control Block

Ratings

typ

Parameter

Symbol

Conditions

max.boost

Unit

min

+18

Control range

Geq

Estep

Rfeed

+20

2

+22

dB

kΩ

Step resolution

1

3

Internal feedback resistance

66.6

Treble Band Equalizer Control Block

Ratings

typ

Parameter

Symbol

Conditions

Unit

min

max

Control range

Geq

Estep

Rfeed

max.boost/cut

±8

1

±10

2

±12

3

dB

kΩ

Step resolution

Internal feedback resistance

51.7

No. 6270-2/20

LC75341, 75341M

Overall Characteristics

Ratings

typ

Parameter

Symbol

Conditions

Unit

min

max

0.01

Total harmonic distortion

Crosstalk

THD

CT

V

_IN= 1 Vrms, f = 1 kHz, all flat overall

%

dB

µV

dB

mA

µA

V_IN= 1 Vrms, f = 1 kHz, Rg = 1 kΩ, all flat overall

All flat overall, 80 kHz, L.P.F

All flat overall, f = 1 kHz

80

Output noise voltage

Maximum attenuation

Current drain

V_N

9.3

–90

37

Vomin

I_DD

V_DD– V_SS= +10 V

High-level input current

Low-level input current

I_IH

CL, DI, CE: V_IN= 10 V

10

I_IL

CL, DI, CE: V_IN= 0 V

–10

Pin Assignment

LC75341, 75341M

(Top view)

No. 6270-3/20

LC75341, 75341M

Equivalent Circuit

No. 6270-4/20

LC75341, 75341M

Control System Timing and Data Format

Applications control the LC75341 and LC75341M by applying the stipulated serial data to the CL, DI, and CE pins. This

data consists of a total of 40 bits, of which 8 bits are the address and 32 bits are the data itself.

• Address code (B0 to A3)

The LC75341 and LC75341M have an 8-bit address code, and can be used together with other ICs that support the

Sanyo CCB serial bus format.

Address code

B0

0

B1

1

B2

0

B3

0

A0

0

A1

0

A2

0

A3

1

(LSB)

(82HEX)

• Control code allocation

Input switching control

D0

D1

D2

D3

Operation

(L1, L2, L3, L4, R1, R2, R3, R4)

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

L1 (R1) ON

L2 (R2) ON

L3 (R3) ON

L4 (R4) ON

All switches off

No. 6270-5/20

LC75341, 75341M

Input Gain Control

D4

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

D5

0

1

0

1

0

1

0

1

D6

0

1

0

1

D7

0

1

Operation

0 dB

+2 dB

+4 dB

+6 dB

+8 dB

+10 dB

+12 dB

+14 dB

+16 dB

+18 dB

+20 dB

+22 dB

+24 dB

+26 dB

+28 dB

+30 dB

No. 6270-6/20

LC75341, 75341M

Volume Control

D8

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

D9

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

D10

0

1

0

1

0

1

0

1

0

1

0

1

0

D11

0

1

0

1

0

1

0

D12

0

1

0

1

D13

0

1

D14

0

D15

0

Operation

0 dB

–1 dB

–2 dB

–3 dB

–4 dB

–5 dB

–6 dB

–7 dB

–8 dB

–9 dB

–10 dB

–11 dB

–12 dB

–13 dB

–14 dB

–15 dB

–16 dB

–17 dB

–18 dB

–19 dB

–20 dB

–21 dB

–22 dB

–23 dB

–24 dB

–25 dB

–26 dB

–27 dB

–28 dB

–29 dB

–30 dB

–31 dB

–32 dB

–33 dB

–34 dB

–35 dB

–36 dB

–37 dB

–38 dB

–39 dB

–40 dB

–41 dB

–42 dB

–43 dB

–44 dB

–45 dB

–46 dB

–47 dB

–48 dB

–49 dB

–50 dB

No. 6270-7/20

LC75341, 75341M

Volume Control

D8

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

D9

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

D10

0

1

0

1

0

1

0

1

0

D11

0

1

0

1

0

D12

1

0

1

D13

1

0

D14

0

1

D15

0

Operation

–51 dB

–52 dB

–53 dB

–54 dB

–55 dB

–56 dB

–57 dB

–58 dB

–59 dB

–60 dB

–61 dB

–62 dB

–63 dB

–64 dB

–65 dB

–66 dB

–67 dB

–68 dB

–69 dB

–70 dB

–71 dB

–72 dB

–73 dB

–74 dB

–75 dB

–76 dB

–77 dB

–78 dB

–79 dB

–∞ dB

Treble Control

D16

1

D17

0

D18

1

D19

0

Operation

+10 dB

+8 dB

+6 dB

+4 dB

+2 dB

0 dB

0

1

0

1

0

1

0

1

0

1

0

1

–2 dB

–4 dB

–6 dB

–8 dB

–10 dB

0

1

0

1

0

1

0

1

0

1

No. 6270-8/20

LC75341, 75341M

Bass Control

D20

0

D21

1

D22

0

D23

1

D24

0

D25

0

Operation

+20 dB

+18 dB

+16 dB

+14 dB

+12 dB

+10 dB

+8 dB

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

+6 dB

0

1

0

+4 dB

1

0

1

0

+2 dB

0

0 dB

Channel Selection

D26

0

D27

0

Operation

1

0

RCH

LCH

0

1

Left and right together

Test Mode

D28

0

D29

0

D30

0

D31

0

Operation

These bits are used for IC testing and must all be set to 0

during normal operation.

No. 6270-9/20

LC75341, 75341M

Pin Functions

Pin No.

Description

Notes

12

11

10

9

L1

L2

L3

L4

R1

R2

R3

R4

• Input signal connections

13

14

15

16

8

LSEL0

RSEL0

• Input selector outputs

17

5

LBASS

RBASS

• Connections for the resistors and capacitors that form the bass band

filters.

20

• These pins are used both as the connections for the resistors and

capacitors that form the bass band filters and as the outputs from the

bass/treble circuits.

4

LOUT

ROUT

21

6

LTRE

RTRE

• Connections for the capacitors that form the treble band filters.

19

7

LIN

• Volume control and equalizer input

18

RIN

• Connection to the 0.5 × V_DDvoltage generator circuit used as the

analog signal ground.

22

Vref

Applications must connect a capacitor of about 10 µF between this pin

and V_SSto exclude power supply ripple.

Continued on next page.

No. 6270-10/20

LC75341, 75341M

Continued from preceding page.

Pin No.

Description

Notes

V_SS

3

• Ground

V_DD

23

• Power supply

• Chip enable

Data is written to the internal latch when this pin goes from high to low.

The internal analog switches operate at this point. Data transfer is

enabled when this pin is high.

2

CE

1

DI

• Serial data and clock inputs used for IC control.

24

CL

Internal Equivalent Circuits

• Selector block equivalent circuit

The right channel is identical.

Unit (resistance: kΩ)

No. 6270-11/21

LC75341, 75341M

• Treble and bass band block internal equivalent circuit

From

volume

block

The right channel is identical.

Unit (resistance: kΩ)

The right channel is identical.

Unit (resistance: kΩ)

Set switches SW1 and SW3 to the on position for boost, and set switches SW2 and SW4 to the on

position for cut. For a flat (0 dB) response, set the 0dBSW, SW2, and SW3 switches on.

No. 6270-12/20

LC75341, 75341M

• Volume block internal equivalent circuit

To

treble

block

The right channel is identical.

Unit (resistance: Ω)

No. 6270-13/20

LC75341, 75341M

Test Circuits

• Total harmonic distortion

Microcontroller

The right channel is identical.

Distortion analyzer

Units (resistance: Ω, capacitnace: F)

No. 6270-14/20

LC75341, 75341M

• Output noise voltage

Microcontroller

The right channel is identical.

Units (resistance: Ω, capacitnace: F)

Noise meter

No. 6270-15/20

LC75341, 75341M

• Crosstalk

Microcontroller

Volt meter

Units (resistance: Ω, capacitnace: F)

No. 6270-16/20

LC75341, 75341M

Bass Band Circuit

This section presents the equivalent circuit and the calculations for the external capacitors and resistors used to achieve a

center frequency of 100 Hz.

• Bass band equivalent circuit

• Sample calculation

Specifications

Center frequency: f0 = 100 Hz

Gain at maximum boost: G = 20 dB

Let R1 = 0, R2 = 66.6 KΩ, and C1 = C2 = C.

(1) Determine R2 from the fact that G = 20 dB.

R2

2R3

G

+20dB

= 20 × LOG

1 + ——

(

)

10

R2

66000

R3 = ———————— = ————— ≠ 3.7 kΩ

2 (10^G+20dB/20– 1)

2 × (10 – 1)

(2) Determine C from the fact that the center frequency f0 = 100 Hz.

1

f 0 = ————————

2π R3R2C1C2

1

C = —————— = ——————————— ≠ 0.1 µF

2πf 0 R3R2 2π × 100 66000 × 3700

(3) Determine Q.

R3R2

1

Q = ——— • ——— ≠ 2.1

2R3

R3R2

• Treble band circuit

The treble band circuit provides shelving characteristics.

This section presents the equivalent circuit in boost mode and the formulas used to calculate the external component

values.

No. 6270-17/20

LC75341, 75341M

• Sample calculation

Specifications - Set frequency: f = 26,000 Hz

Gain at maximum boost: G

= 10 dB

+10dB

Let R1 = 16.240 kΩ, R2 = 35.461 KΩ,

Substitute the above constants into the following formulas.

R2

G = 20 × LOG

1 + ———————

10

(

)

R1²+ (1 / ωC)²

1

C = ———————————

R2

2πf ————— – R1²

(

)

10^G/20–1

1

= —————————————— ≠ 2700 (pF)

35461

3.16 – 1

2

2π26000 ———— – 16240²

(

)

Usage Notes

• When power is first applied, the states of the internal analog switches will be undefined. Applications must provide

external muting until the control data has been transferred and the switches set to appropriate states.

• Applications should transfer both the left and right channel initial settings data before releasing the muting function

when initializing this IC after first applying power.

• Applications should cover the CL, DI, and CE pin lines with the ground pattern, or should use shielded cables for these

lines to prevent the high-frequency digital signals transmitted over these lines from entering analog signal system.

• When the oscillation occurs, connect a resistor of at least 200 Ω to LOUT and ROUT pins.

No. 6270-18/20

LC75341, 75341M

Volume Control Step Characteristics

Bass Control Frequency Characteristics

0

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

5

-0

V_DD= 9 V

V_SS= 0 V

V_IN= –20 dBV

With external capacitor

and resistor values of

0.1 µF and 3.7 kΩ,

respectively

-5

-10

-15

-20

-25

-30

V_DD= 9 V

V_SS= 0 V

V_IN= 0 dBV

f = 1 KHz

All tone control

settings flat

-

∞

-80

-70

-60

-50

-40

-30

-20

-10

0

10

100

1000

10000

Frequency, f -—Hz

Step — dB

THD - Frequency Characteristics (1)

Treble Control Frequency Characteristics

1

0

V_DD= 9 V

V_SS= 0 V

V_IN= 0 dBV

-5

100 kHz low-pass weighting

All tone control settings flat

-10

-15

-20

-25

-30

0.1

With the volume

control at the

–10 dB position

0.01

V_DD= 9 V V_SS= 0 V

V_IN= –20 dBV

^-35With an external capacitor

With the volume control

at the 0 dB position

value of 2700 pF

-10

0.001

10

100

1000

10000

100000

10

100

1000

10000

100000

Frequency, f — Hz

THD - Frequency Characteristics (2)

THD - Supply Voltage Characteristics (1)

V_SS= 0 V

1

V_DD= 9 V V_SS= 0 V

V_IN= 0 dBV

100 kHz low-pass weighting

All tone control settings flat

f = 1 KHz

100 kHz low-pass weighting

All tone control settings flat

0.1

With the volume control at the –10 dB position

With the volume control at the 0 dB position

With the volume control at

the 0 dB position

0.01

With the volume control at the –10 dB position

0.001

4

5

6

7

8

9

10

11

10

100

1000

10000

100000

Supply voltage, V_DD— V

Frequency, f — Hz

THD - Supply Voltage Characteristics (2)

V_SS= 0 V

V_IN= –10 dBV

f = 1 KHz

THD - Input Level Characteristics (1)

1

10

V_DD= 9 V

V_SS= 0 V

100 kHz low-pass

weighting

All tone control settings

flat

100 kHz low-pass weighting

All tone control settings flat

1

0.1

With the volume control at the –10 dB position

f = 20 KHz

0.01

f = 1 KHz

With the volume control at the 0 dB position

0.001

-20

-15

-10

-5

0

5

10

4

5

6

7

8

9

10

11

Input level, V_IN— dBV

Supply voltage, V_DD— V

No. 6270-19/20

LC75341, 75341M

THD - Input Level Characteristics (1)

10

1

0.1

f = 20 KHz

f = 1 KHz

0.01

V

_DD= 9 V

0.001

V_SS= 0 V

-20

-15

-10

-5

0

5

10

100 kHz low-pass weighting

All tone control settings flat

With the volume control at the

–10 dB position

Input level, V_IN— dBV

Specifications of any and all SANYO products described or contained herein stipulate the performance,

characteristics, and functions of the described products in the independent state, and are not guarantees

of the performance, characteristics, and functions of the described products as mounted in the customer’s

products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,

the customer should always evaluate and test devices mounted in the customer’s products or equipment.

SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all

semiconductor products fail with some probability. It is possible that these probabilistic failures could

give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,

or that could cause damage to other property. When designing equipment, adopt safety measures so

that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective

circuits and error prevention circuits for safe design, redundant design, and structural design.

In the event that any or all SANYO products (including technical data, services) described or contained

herein are controlled under any of applicable local export control laws and regulations, such products must

not be exported without obtaining the export license from the authorities concerned in accordance with the

above law.

No part of this publication may be reproduced or transmitted in any form or by any means, electronic or

mechanical, including photocopying and recording, or any information storage or retrieval system,

or otherwise, without the prior written permission of SANYO Electric Co., Ltd.

Any and all information described or contained herein are subject to change without notice due to

product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification”

for the SANYO product that you intend to use.

Information (including circuit diagrams and circuit parameters) herein is for example only; it is not

guaranteed for volume production. SANYO believes information herein is accurate and reliable, but

no guarantees are made or implied regarding its use or any infringements of intellectual property rights

or other rights of third parties.

This catalog provides information as of December, 1999. Specifications and information herein are

subject to change without notice.

PS No. 6270-20/20


型号：	LC75341M
厂家：	SANYO SEMICON DEVICE
描述：	Single-Chip Volume and Tone Control System 单芯片音量和音调控制系统
文件：	总20页 (文件大小：295K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

LC75341M [SANYO]

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