ROHM BD3814FV Technical data

Sound Processors for Home Theater Systems

6ch
Electronic Volume

BD3814FV

●Description

BD3814FV is a 1-chip sound processor incorporating such functions as volume, bass, and treble, necessary for AV receivers,
home theater systems, and mini-audio systems. This IC adopts the Bi-CMOS process, and realizes low distortion, low noise,
and a wide dynamic range.

●Features

1) Dynamic range: 132dB (tone bypath, VOL = MUTE, IHF-A)

2) Master volume 6ch independent (0 to -95dB, MUTE 1dB/step)

3) Low current consumption design achieved by adopting the BiCMOS process

4) Maximum output voltage: 4.3Vrms (Vcc=7V, VEE=-7V, RL=10kΩ)

5) Built-in 2 OP amplifiers

6) 2-line serial control (for both 3.3V and 5V)

●Applications

AV receivers, home theater systems, mini-audio systems, TVs etc.

●Absolute maximum ratings (Ta=25℃)

Parameter Symbol Ratings Unit

Power supply voltage

VCC 7.5*1

VEE -7.5

V

No.10081EAT05

Input signal voltage VIN VCC+0.3 to VEE-0.3 V

Power dissipation Pd 900*2 mW

Operating temperature range Topr -20 to +75 ℃

Storage temperature range Tastg -55 to +125 ℃

*1 Even in the specified range of Power Supply Voltage, applying voltage only to the VCC side may cause an excessive current

to give a permanent damage to the IC.
When starting up power supplies, VEE and VCC should be powered on simultaneously or VEE first; then followed by VCC.

*2 Reduced by 9 mW/C over 25C, when installed on the standard board (size: 70x70x1.6mm).

●Operating conditions

Must function normally at Ta=25℃.

Parameter Symbol

Operating source voltage

VCC 5 7 7.3

VEE -7.3 -7 -5

Ratings

Min. Typ. Max.

Unit

V

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1/10

2010.06 - Rev.A

BD3814FV

●Electrical characteristics

Ta =2 5℃, VCC=7V, VEE=-7V, f=1kHz, Vin=1Vrms, RL=10kΩ, Rg=600Ω, Master volume=0dB,
Bass and Treble=0dB unless otherwise noted.

Circuit current

L input current(CL,DA) IIL ― 0.5 5 µA CL=DA=0V

H input current(CL,DA) IIH ― 0 5 µA CL=DA=5V

Output voltage gain 1 Gv1 -2 0 2 dB Measure: Pin27,28,29,30, 31,32

Output voltage gain 2 Gv2 -2 0 2 dB Measure: Pin3, 7

Parameter Symbol

VCC

IQ

VEE -17 -7 ―

Limits

Min. Typ. Max.

― 7 17

Unit. Conditions

mA No signal

Technical Note

Total harmonic distortion
ratio 1

Total harmonic distortion
ratio 2

Maximum output voltage 1 Vomax1 3.6 4.3 ― Vrms

Maximum output voltage 2 Vomax2 3.6 4.3 ― Vrms

Total output

Output noise voltage 1 Vno1

Output noise voltage 2 Vno2 ― 1.0 6.0 µVrms

Cross talk between channels
Rch→Lch

Cross talk between channels
Lch→Rch

Cross talk between channels
SRch→SLch

Cross talk between channels
SLch→SRch

Cross talk between channels
Cch→SWch

THD1 ― 0.001 0.03 %

THD2 ― 0.001 0.03 %

― 1.0 6.0 µVrms

― 1.7 10 µVrms

CTCRL ― -95 -80 dB

CTCLR ― -95 -80 dB

CTCSRL ― -95 -80 dB

CTCSLR ― -95 -80 dB

CTCCSW ― -95 -80 dB

Measure: Pin27,28,29,30,31,32
BW=400 ~ 30kHz

Measure: Pin3, 7
BW=400 ~ 30KHz

Measure: Pin27,28,29,30,31,32
THD=1%

Measure: Pin 3,7
THD=1%

Measure: Pin 27, 28
Tone: By-pass, Rg=0Ω, BW=IHF-A

Measure: Pin 27, 28
Tone: ON, Rg=0Ω, BW=IHF-A

Measure: Pin3, 7, 29, 30, 31, 32
Rg=0Ω, BW=IHF-A

Measure: Pin27(OUTFL)
Rg=0Ω, BW=IHF-A
Reference: Pin28(OUTFR)=1Vrms

Measure: Pin28(OUTFR)
Rg=0Ω, BW=IHF-A
Reference: Pin27(OUTFL)=1Vrms

Measure: Pin 30(OUTSL)
Rg=0Ω, BW=IHF-A
Reference: Pin31(OUTSR)=1Vrms

Measure: Pin 31(OUTSR)
Rg=0Ω, BW=IHF-A
Reference: Pin30(OUTSL)=1Vrms

Measure: Pin 32(OUTSW)
Rg=0Ω, BW=IHF-A
Reference: Pin29(OUTC) =1Vrms

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2/10

2010.06 - Rev.A

BD3814FV

Input impedance V RinV 14 20 26 kΩ Measure: Pin27,28,29,30,31,32

Parameter Symbol

Min. Typ. Max.

Limits

Technical Note

Unit. Conditions

Volume control range GVR -98 -95 -92 dB

Volume set error 1 VE1 -1.5 0 1.5 dB

Volume set error 2 VE2 -2.5 0 2.5 dB

Maximum attenuation
amount

Volume output

Residual noise voltage 1 Vnom1 ― 1.0 6.0 µVrms

Residual noise voltage 2 Vnom2 ― 1.0 6.0 µVrms

Cross talk between channels
SWch→Cch

Treble maximum boost gain GTB 12 14 16 dB

Treble maximum cut gain GTC -16 -14 -12 dB

Vmin ― -115 -105 dB

CTCSWC ― -95 -80 dB

Measure: Pin27,28,29,30,31,32
Vin=3Vrms

Measure: Pin27,28,29,30, 31,32
0 to –53dB, Vin=3Vrms

Measure: Pin27,28,29,30,31,32

-54 to –95dB, Vin =3Vrms

Measure: Pin27,28,29,30,31,32
Vin =3Vrms, BW=IHF-A

Measure: Pin27, 28
Tone: By-Pass, Rg=0Ω, BW=IHF-A

Measure: Pin29, 30, 31, 32
Rg=0Ω, BW=IHF-A

Measure: Pin 29(OUTC)
Rg=0Ω, BW=IHF-A
Reference: Pin32(OUTSW)=1Vrms

Measure: Pin 27, 28
f=15kHz, Vin =0.4Vrms

Measure: Pin 27, 28
f=15kHz, Vin =0.4Vrms

Treble

Treble step resolution TR ― 2 ― dB

Treble gain set error TE -2 0 2 dB

Bass maximum boost gain GBB 12 14 16 dB

Bass maximum cut gain GBC -16 -14 -12 dB

Bass

Bass step resolution BR ― 2 ― dB

Bass gain set error BE -2 0 2 dB

* Note: This IC is not designed to be radiation-resistant.

Measure: Pin 27, 28
f=15kHz, Vin =0.4Vrms

Measure: Pin 27, 28
f=15kHz, Vin =0.4Vrms

Measure: Pin 27, 28
f=100Hz, Vin=0.4Vrms

Measure: Pin 27, 28
f=100Hz, Vin =0.4Vrms

Measure: Pin 27, 28
f=100Hz, Vin =0.4Vrms

Measure: Pin 27, 28
f=100Hz, Vin =0.4Vrms

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3/10

2010.06 - Rev.A

BD3814FV

●Timing chart

1. Signal timing conditions

・Data is read on the rising edge of the clock.
・Latch is read on the falling edge of the clock.
・Latch signal must terminate with the LOW state.

* To avoid malfunctions, clock and data signals must terminate with the LOW state.

(CLOCK)

DATA
LATCH

CL

DA

90% 90% 90%

DATA DATA

Parameter Symbol

Technical Note

90% 90% 90% 90%

twc

10% 10% 10%

thd thdth ts tsl thl tsd

twd

twh

Fig.1

twc

90% 90%

twl

10%

10% 10%

LATCH

Limits

Min. Typ. Max.

Terminate
with Low.

Unit

Minimum clock width twc 2.0 － － μs

Minimum data width twd 2.0 － － μs

Minimum latch width twl 2.0 － － μs

LOW hold width twh 2.0 － － μs

Data setup time (DATA→CLK) tsd 1.0 － － μs

Data hold time (CLK→DATA) thd 1.0 － － μs

Latch setup time (CLK→LATCH) tsl 1.0 － － μs

Latch hold time (DATA→LATCH) thl 1.0 － － μs

Latch low setup time ts 1.0 － － μs

Latch low hold time th 1.0 － － μs

2. Voltage conditions for control signal

Parameter

“H” input voltage
“L” input voltage 0 － 1.0 V

Condition

Vcc=5 ~ 7.3V

VEE=-5 ~ -7.3V

Limits

Min. Typ. Max.(≦Vcc)

Unit

2.2 － 5.5 V

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4/10

2010.06 - Rev.A

BD3814FV

3. Basic configuration of control data format
Data input direction

MSB LSB

D16 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Data

・Control data format

Data input direction

D16 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Data

①

D16 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Data

②

D16 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Data

③

D16 D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Data

④

Treble Bass Tone * * * * * 0 0 0

Master Volume FRch Master Volume FLch 0 0 1

Master Volume SRch Master Volume SLch 0 1 0

Master Volume Cch Master Volume SWch 0 1 1

Technical Note

Data Select Address

Select Address

By changing select address, 4 control data formats can be selected.
Do not set the select address data to any format other than that specified above.
At power-on sequence, initialize all data.
* is 0 or 1.

Example:

Data input direction

MSB LSB MSB LSB MSB LSB MSB LSB

Data① L Data② L Data③ LData④ L

“L” shows latch.

After power-on, for the second and subsequent times, only the necessary data can be selected for setting

Example: When to change bus,

Input direction

MSB LSB

Data① L

“L” shows latch.

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5/10

2010.06 - Rev.A

BD3814FV

●Application circuit

47K

47K

IN

SW

IN

SR

IN

SL

IN

C

IN

FR

IN

FL

VEE

47

1

2

3

4

5

6

7

8

9

µ

10

10

11

µ

10

12

13

µ

10

14

15

µ

10

16

17

µ

10

18

19

µ

10

20

µ

MASTER

VOLUME

0～-95dB

1dB/step，MUTE

Ri=20K

Ri=20K

Ri=20K

Ri=20K

Ri=20K

Ri=20K

Fig.2

BASS

TREBLE

Technical Note

40

39

47

38

10K

37

10K

36

10K

35

34

33

32

31

30

29

28

27

0.1

26

25

0.1

0.1

24

23

0.1

22

4700P

21

4700P

UNIT
RESISTOR: Ω
CAPACITOR: F

µ

µ

µ

µ

µ

Vcc

CL

DA

MUTE

OUTSW

OUTSR

OUTSL

OUTC

OUTFR

OUTFL

4.7K

4.7K

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6/10

2010.06 - Rev.A

BD3814FV

●Reference data

8

6

4

2

0

-2

-4

CIRCUIT CURRENT (mA)

-6

-8

0510

POW ER SUPPL Y (V)

Fig.3 Circuit current - Power supply

10

1

0.1

0.01

THD+N (%)

0.001

0.0001

0.001 0.01 0.1 1 10

INPUT VOLTAGE (Vrms)

Fig.6 THD+N - Input voltage

VCC

VEE

10

8

6

4

2

0

-2

GAIN (dB)

-4

-6

-8

-10

10 100 1000 10000 100000

FREQUENCY (Hz)

Fig.4 Voltage gain - Frequency

20

15

10

GAIN (dB)

-5

-10

-15

-20

+14dB

5

0

10 100 1000 10000 100000

-14～+14dB

2dB/step

-14dB

FREQUENCY (Hz)

Fig.7 Bass gain - Frequency

Technical Note

10

1

0.1

0.01

OUTPUT VOLTAGE (Vrms )

0.001

0.001 0.01 0.1 1 10

IN PUT VOLTAGE (Vrms)

Fig.5 Output voltage - Input voltage

20

15

10

5

0

-5

GAIN (dB)

-14～+14dB

-10

-15

-20

2dB/step

10 100 1000 10000 100000

FREQUENCY (Hz)

Fig.8 Treble gain - Frequency

+14dB

-14dB

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7/10

2010.06 - Rev.A

BD3814FV

●Notes for use

1. Numbers and data in entries are representative design values and are not guaranteed values of the items.

2. Although ROHM is confident that the example application circuit reflects the best possible recommendations, be sure to
verify circuit characteristics for your particular application. Modification of constants for other externally connected circuits
may cause variations in both static and transient characteristics for external components as well as this Rohm IC. Allow for
sufficient margins when determining circuit constants.

3. Absolute maximum ratings
Use of the IC in excess of absolute maximum ratings, such as the applied voltage or operating temperature range (Topr),
may result in IC damage. Assumptions should not be made regarding the state of the IC (short mode or open mode) when
such damage is suffered. A physical safety measure, such as a fuse, should be implemented when using the IC at times
where the absolute maximum ratings may be exceeded.

4. VEE potential
Make the VEE pin voltage such that it is the lowest voltage even when operating below it. Actually confirm that the
voltage of each pin does not become a lower voltage than the VEE pin, including transient phenomena.

5. Thermal design
Perform thermal design, in which there are adequate margins, by taking into account the power dissipation (Pd) in actual
states of use.

6. Short circuit between terminals and erroneous mounting
Pay attention to the assembly direction of the ICs. Wrong mounting direction or shorts between terminals, GND, or other
components on the circuits, can damage the IC.

Technical Note

7. Operation in strong electromagnetic field
Using the ICs in a strong electromagnetic field can cause operation malfunction.

8. Serial control
For the CL and DA terminals, the patterned and other wirings should be routed as not to cause interference with the
analog-signal-related lines.

9. Power ON/OFF
(a) At power ON/OFF, a shock sound will be generated. Therefore, use MUTE on the set.
(b) When turning on power supplies, VEE and VCC should be powered on simultaneously, or VEE first followed
by VCC. If the VCC side is started up first, an excessive current may flow from VCC to VEE.

10. Tone bypath switching
For tone bypath switching, use MUTE on the set.

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8/10

2010.06 - Rev.A

BD3814FV

●Thermal derating characteristic

1000

800

600

400

Power Diss ipation Pd （mW)

200

0

BD3814FV
ROHM standard board packaging time value
Board size: 70 x 70 x 1.6mm Raw material : FR4 glass epoxy board (copper area 3% or below)

Technical Note

900mW

0 25 50 75 100 125

Ta(℃)

Fig.9

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9/10

2010.06 - Rev.A

BD3814FV

●Ordering part number

B D 3 8 1 4 F V - E 2

Part No. Part No.

SSOP-B40

13.6 ± 0.2

(MAX 13.95 include BURR)

40

21

5.4 ± 0.2

7.8 ± 0.3

1

20

0.5 ± 0.2

0.15 ± 0.1

1.8 ± 0.1

0.1

0.65

0.22 ± 0.1

0.08

0.1 S

M

(Unit : mm)

Package

FV: SSOP-B40

<Tape and Reel information>

Embossed carrier tapeTape

Quantity

Direction
of feed

2000pcs
E2

The direction is the 1pin of product is at the upper left when you hold

()

reel on the left hand and you pull out the tape on the right hand

Reel

Packaging and forming specification
E2: Embossed tape and reel

1pin

Order quantity needs to be multiple of the minimum quantity.

∗

Technical Note

Direction of feed

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10/10

2010.06 - Rev.A

Notes

No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.

The content specied herein is subject to change for improvement without notice.

The content specied herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specications,
which can be obtained from ROHM upon request.

Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.

Great care was taken in ensuring the accuracy of the information specied in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.

The technical information specied herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.

Notice

The Products specied in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, ofce-automation equipment, commu­nication devices, electronic appliances and amusement devices).

The Products specied in this document are not designed to be radiation tolerant.

While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.

Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, re or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, re control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.

The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
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of the Products for the above special purposes. If a Product is intended to be used for any
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Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.

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R1010

A