ROHM BD3460FS Technical data

Sound Processors for Car Audios

General-Purpose Electronic Volume
with Built-in Advanced Switch

BD3460FS,BD3461FS,BD3464FV,BD3465FV

●Description

BD3460FS, BD3461FS, BD3464FV, BD3465FV is 4ch / 6ch electronic volume which has audio efficiency of the industry
best level. It has 『Outside sound mixing function (with volume)』(BD3461FS, BD3465FV) in favorite channel to mixing of
the portable telephone and car navigation’s guide sound. Also, which has 『Ground isolation amplifier』(BD3460FS,
BD3461FS) when connecting with the outside voice inputs such as portable audio and car navigation. It is lineup and
possible to be chosen to the use by it. Also, Rohm has the volume switching shock sound prevention technique “Advanced
switch”. Therefore, it supports the construct of the high quality car audio space by the simple control.

●Features

1) Reduce switching noise of volume by using advanced switch circuit. (Possible to control all steps)

2) Low distortion (0.0004% typ), Low noise (1.6μVrms)

3) Mixing for external sound monaural 3ch. It is possible that is mixed to front/Rear/Sub output (BD3461FS)
Front/Rear output (BD3465FV) Lch/Rch independently.

4) Built-in 3ch ATT for external sound mixing that can be controlled independently. (BD3461FS, BD3465FV)

5) Built-in buffered stereo ground isolation amplifier inputs, ideal for external input. (BD3460FS, BD3461FS)

6) Bi-CMOS process is suitable for the design of low current and low energy. And it provides more quality
for small scale regulator and heat in a set.

7) Package is SSOP-A24,SSOP-B20. Putting input-terminals together and output-terminals together can make
PCB layout easier and can makes area of PCB smaller.

8) It is possible to control by 3.3V / 5V for I

●Applications

It is the optimal for the car audio. Besides, it is possible to use for the car navigation, audio equipment of mini Compo, micro
Compo, DVD, TV etc with all kinds.

●Line up matrix

Function BD3460FS BD3461FS BD3464FV BD3465FV

Volume 6ch 6ch 4ch 4ch
Input for external sound mixing - ○ - ○
GND isolation amplifier ○ ○ - -

Package SSOP-A24 SSOP-A24 SSOP-B20 SSOP-B20

2

C BUS.

No.11085EBT09

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© 2010 ROHM Co., Ltd. All rights reserved.

2011.04 - Rev.B

BD3460FS,BD3461FS,BD3464FV,BD3465FV

●Absolute maximum ratings (Ta=25℃)

Parameter Symbol Ratings Unit

Power supply Voltage VCC 10.0V V

Input voltage VIN VCC+0.3 ~ GND-0.3 V

Technical Note

Power Dissipation

BD3460FS
BD3461FS

BD3464FV
BD3465FV

Pd

1000

810

1

※

2

※

Storage Temperature Tastg -55 ~ +150 ℃

※1 This value decreases 8mW/℃ for Ta=25℃ or more. Thermal resistance θja=125.0 (℃/W)
※2 This value decreases 6.5mW/℃ for Ta=25℃ or more. Thermal resistance θja=153.8 (℃/W)

ROHM standard board shall be mounted.
ROHM Standard board Size：70×70×1.6(㎣)
material：FR4 grass epoxy board(3% or less of copper foil area)

●Operating conditions

Parameter Symbol

Min. Typ Max.

Ratings

Power supply Voltage VCC 7.0 - 9.5 V

Temperature Topr -40 - +85 ℃

mW

Unit

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© 2010 ROHM Co., Ltd. All rights reserved.

2011.04 - Rev.B

BD3460FS,BD3461FS,BD3464FV,BD3465FV

Technical Note

●Electrical characteristics
Unless specified particularly, Ta=25℃, VCC=8.5V, f=1kHz, Vin=1Vrms, Rg=600Ω, RL=10kΩ, INF1 input, Volume 0dB

Limit

BLOCK

Parameter Symbol

Min. Typ. Max.

Unit Condition

Current upon no signal IQ － 25 40 mA No signal

Voltage gain GV -1.5 0 1.5 dB Gv=20log(VOUT/VIN)

Channel balance CB -1.5 0 1.5 dB CB=GV1-GV2

Total harmonic distortion TH D － 0.0004 0.05 %

Output noise voltage ＊ VNO － 1.9 10 μVrms

GENERAL

Residual output noise voltage ＊ VNOR － 1.6 10 μVrms

Cross-talk between channels ＊ CTC － -105 -90 dB

Ripple rejection RR － -80 -40 THD

Input impedance R

70 100 130 kΩ

IN D

DIFF

Common mode rejection ratio ＊ CMRR 50 65 － dB

BD3461FS)

(BD3460FS,

Input impedance R

70 100 130 kΩ

IN V

Maximum input voltage VIM 2 2.35 － Vrms

Maximum gain GV

Maximum attenuation ＊ G

Step resolution GV

21 23 25 dB

BST

－ -109 -90 dB

V MIN

STEP

－ 1 － dB GAIN&ATT=+23～-79dB

VOUT=1Vrms
BW=400-30kHz

Rg=0Ω
BW=IHF-A

Volum e=-∞dB
Rg=0Ω
BW=IHF-A
Rg=0Ω
CTC=20log(VOUT/VIN)
BW=IHF-A
f=100Hz
VRR=100mVrms
RR=20log(VOUT/VCCIN)

PIN and NIN input
CMRR=20log10(VIN/VOUT)
BW=IHF-A

VIM at THD+N(VOUT)=1%
BW=400-30kHz

Gain=23dB
VIN=100mVrms
G

=20log(VOUT/VIN)

V

Volum e=-∞dB
Gv=20log(VOUT/VIN)
BW=IHF-A

Gain set error GV

VOLUME

Attenuation set error 1 G

Attenuation set error 2 G

Attenuation set error 3 G

Output impedance R

Maximum output voltage VOM 2 2.35 － Vrms

Input impedance R

Maximum attenuation ＊ G

Step resolution 1 GM

BD3465FS)

(BD3461FS,

MIXING ATT

Step resolution 2 GM

VP-9690A(Average value detection, effective value display) filter by Matsushita Communication is used for ＊ measurement.
Phase between input / output is same.

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© 2010 ROHM Co., Ltd. All rights reserved.

-2 0 2 dB

ERR

V ERR1

V ERR2

V ERR3

OUT

IN M

M MIN

STEP1

STEP2

-2 0 2 dB

-3 0 3 dB

-4 0 4 dB

- － 50 Ω

70 100 130 kΩ

－ -90 － dB

－ 8 － dB ATT=0～-32dB

－ 16 － dB ATT=-32～-64dB

Gain=+1～+23dB

ATT=-1～-15dB

ATT=-16～-47dB

ATT=-48～-79dB

Vin=100mVrms

THD+N=1%
BW=400-30kHz

GM=20log(VOUT/VIN)
BW=IHF-A, ATT=-∞dB

2011.04 - Rev.B

BD3460FS,BD3461FS,BD3464FV,BD3465FV

]

]

]

]

]

]

]

]

●Electrical characteristic curves (Reference data)

50

40

30

20

10

QUIESCENT CURRENT:IQ[mA]

0

0246810

SUPPLY VOLTAGE : VCC[V

Fig.1 Iq vs Vcc

10

1

0.1

0.01

0.001

0.0001

TOTAL HARMONIC DISTORTION:THD+N[%]

0.001 0.01 0.1 1 10

OUTPUT VOLTAGE : Vo[Vrms

30

25

20

15

10

5

VOLUME GAIN : Gv[dB]

0

-5
10 100 1k 10k 100k

FREQUENCY :f [Hz]

Fig.4 Volume Gain vs Freq

(0～+23dB)

0

-20

-40

-60

-80

-100

-120
10 100 1k 10k 100k

CROSS-TALK BETWEEN CHANNELS:CTC[dB]

FREQUENCY :f [Hz]

Fig.7 Cross-Talk vs Freq

2
1
0

-1

-2

-3

-4

VCC=8.5V
Vo= 2Vrm s

-5

Vol ume= 0dB

-6

-7

VOLTAGE GAIN:Gv[dB]

-8

-9

-10

10 100 1k 10k 100k 1000k

FREQUENCY :f [Hz]

5

0

-5

-10

-15

-20

-25

-30

-35

-40

VOLUME ATTENUATION:ATT[dB]

-45
10 100 1k 10k 100k

Fig.5 Volume Gain vs freq 1

(0～-40dB)

0

-20

-40

-60

-80

RIPPLE REJECTION :RR[dB]

-100
10 100 1k 10k 100k

Fig.8 Ripple Rejection Ratio

1

0.1

0.01

0.001

0.0001
10 100 1k 10k 100k

TOTAL HARMONIC DISTORTION:THD+N[dB]

Fig.10 Volume gain of large

output level vs freq

Fig.11 Thd vs freq

Fig.2 Thd vs Vo

FREQUENCY :f [Hz

FREQUENCY :f [Hz]

FREQUENCY :f [Hz

Technical Note

5

4

3

2

1

0

-1

-2

VOLTAGE GAIN : Gv[dB]

-3

-4

-5
10 100 1k 10k 100k

Fig.3 Gain vs Freq

-30

-40

-50

-60

-70

-80

-90

-100

VO LUM E ATTE NUAT ION: ATT [dB]

-110
10 100 1k 10k 100k

Fig.6 Volume Gain vs freq 2

100

10

OUTPUT NOISE :VNO[μVrms]

1

-40 -30 -20 -10 0 10

VOLUME ATTENUATION :ATT [dB

Fig.9 Volume Gain vs Noise

0

-10

-20

-30

-40

-50

-60

-70

-80
10 100 1k 10k 100k

COMMON MODE REJECTION RATIO:CMRR[dB]

Fig.12 CMRR vs freq

(BD3460FS, BD3461FS)

Gain=0dB

FREQUENCY :f [Hz

FREQUENCY :f [Hz

(-41～-79dB)

FREQUENCY :f [Hz

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© 2010 ROHM Co., Ltd. All rights reserved.

2011.04 - Rev.B

BD3460FS,BD3461FS,BD3464FV,BD3465FV

]

●Electrical characteristic curves (Reference data) – Continued

2.5

2.0

1.5

1.0

0.5

OUTF1

OUTF2

MAXIMUM OUTPUT VOLTAGE: VO[Vrms]

0.0
100 1000 10000 100000

LOAD RESISTANCE : RL[Ω

Fig.13 Rload vs Vo

Fig.14 Advanced Switch 1

20

0

-20

-40

-60

-80

-100

MIXING ATTENUATION:ATT[dB]

10 100 1k 10k 100k

FREQUENCY :f [Hz]

Fig.16 Mixing attenuation vs freq

(BD3461FS, BD3465FV)

Technical Note

Fig.15 Advanced Switch 2

OUTF1

OUTF2

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© 2010 ROHM Co., Ltd. All rights reserved.

2011.04 - Rev.B

BD3460FS,BD3461FS,BD3464FV,BD3465FV

●Block diagram and pin configuration

24 23

VCC/2

GND

22 21 20 19 18 17 16 15 14 13

VCC

I2C BUS LOGIC

■6ch Volume
+23dB～-79ｄB/1dB step,-∞
★：Advanced switch circuit

Volume★

Volume★

Volume★

Volume★

Volume★

Volume★

BUFFERED

GND ISO AMP

BUFFERED

GND ISO AMP

100k

1 2

100k 100k

3 4 5 6 7 8 9 10 11 12

100k

100k 100k

100k 100k

100k

Fig.17 BD3460FS

Descriptions of terminal

Terminal

Terminal

No.

Name

1 INF1

2 INF2

3 INR1

4 INR2

5 INS1

6 INS2

7 PIN2

8 NIN2

9 DIFFOUT2

10 DIFFOUT1

11 NIN1

12 PIN1

Description

Front input terminal of 1ch

Front input terminal of 2ch

Rear input terminal of 1ch

Rear input terminal of 2ch

Subwoofer input terminal of 1ch

Subwoofer input terminal of 2ch

DIFF amp positive input terminal of 2ch

DIFF amp negative input terminal of 2ch

DIFF amp output terminal of 2ch

DIFF amp output terminal of 1ch

DIFF amp negative input terminal of 1ch

DIFF amp positive input terminal of 1ch

Terminal

No.

Terminal

Name

13 OUTS2

14 OUTS1

15 OUTR2

16 OUTR1

17 OUTF2

18 OUTF1

19 VCC

20 CS

21 SCL

22 SDA

23 GND

24 FIL

Description

Subwoofer output terminal of 2ch

Subwoofer output terminal of 1ch

Rear output terminal of 2ch

Rear output terminal of 1ch

Front output terminal of 2ch

Front output terminal of 1ch

Power supply terminal

Chip select terminal

I2C Communication clock terminal

2

C Communication data terminal

I

GND terminal

VCC/2 terminal

Technical Note

100k

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© 2010 ROHM Co., Ltd. All rights reserved.

2011.04 - Rev.B

BD3460FS,BD3461FS,BD3464FV,BD3465FV

24 23

22 21 20 19 18 17 16 15 14 13

VCC/2

GND

I2C BUS LOGIC

■6ch Volume
+23dB～-79ｄB/1dB step,-∞
★：Advanced switch circuit

■Mixing ATT
0dB～-32dB/8dB step,

-32dB～-64dB/16dB step,-∞

Independent
control

100k

100k 100k

100k

100k 100k

1 2

3 4 5 6 7 8 9 10 11 12

Fig.18 BD3461FS

Descriptions of terminal

Terminal

Terminal

No.

Name

1 INF1

2 INF2

3 INR1

4 INR2

5 INS1

6 INS2

7 EXT1

8 EXT2

9 EXT3

10 DIFFOUT

11 NIN

12 PIN

Description

Front input terminal of 1ch

Front input terminal of 2ch

Rear input terminal of 1ch

Rear input terminal of 2ch

Subwoofer input terminal of 1ch

Subwoofer input terminal of 2ch

External input terminal of 1ch

External input terminal of 2ch

External input terminal of 3ch

DIFF amp output terminal

DIFF amp negative input terminal

DIFF amp positive input terminal

VCC

100k

Terminal

No.

13 OUTS2

14 OUTS1

15 OUTR2

16 OUTR1

17 OUTF2

18 OUTF1

19 VCC

20 CS

21 SCL

22 SDA

23 GND

24 FIL

100k 100k

Terminal

Name

Technical Note

BUFFERED

GND ISO AMP

100k

100k

Description

Subwoofer output terminal of 2ch

Subwoofer output terminal of 1ch

Rear output terminal of 2ch

Rear output terminal of 1ch

Front output terminal of 2ch

Front output terminal of 1ch

Power supply terminal

Chip select terminal

2

I

C Communication clock terminal

2

I

C Communication data terminal

GND terminal

VCC/2 terminal

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© 2010 ROHM Co., Ltd. All rights reserved.

2011.04 - Rev.B

BD3460FS,BD3461FS,BD3464FV,BD3465FV

20 19

VCC/2

GND

18 17 16 15 14 13 12 11

VCC

I2C BUS LOGIC

■4ch Volume
+23dB～-79ｄB/1dB step,-∞
★：Advanced switch circuit

Volume★

Volume★

Volume★

Volume★

100k

100k

100k 100k

1 2

3 4 5 6 7 8 9 10

Fig.19 BD3464FV

Descriptions of terminal

Termina

l No.

Terminal

Name

Description

Terminal

No.

Terminal

Name

Description

1 INF1 Front input terminal of 1ch 11 OUTR2 Rear output terminal of 2ch

2 INF2 Front input terminal of 2ch 12 OUTR1 Rear output terminal of 1ch

3 INR1 Rear input terminal of 1ch 13 OUTF2 Front output terminal of 2ch

4 INR2 Rear input terminal of 2ch 14 OUTF1 Front output terminal of 1ch

5 NC 15 VCC Power supply terminal

6 NC 16 CS Chip select terminal

7 TEST1 Test Pin 17 SCL I2C Communication clock terminal

8 TEST2 Test Pin 18 SDA I2C Communication data terminal

9 TEST3 Test Pin 19 GND GND terminal

10 NC 20 FIL VCC/2 terminal

Technical Note

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© 2010 ROHM Co., Ltd. All rights reserved.

2011.04 - Rev.B

BD3460FS,BD3461FS,BD3464FV,BD3465FV

20 19

18 17 16 15 14 13 12 11

VCC/2

GND

I2C BUS LOGIC

■4ch Volume
+23dB～-79ｄB/1dB step,-∞
★：Advanced switch circuit

■Mixing ATT
+0dB～-32dB/8dB step,

-32dB～-64dB/16dB step,-∞

1 2

100k

100k

100k 100k

3 4 5 6 7 8 9 10

Fig.20 BD3465FV

Descriptions of terminal

Terminal

Terminal

No.

Name

1 INF1

2 INF2

3 INR1

4 INR2

5 NC

6 NC

7 EXT1

8 EXT2

9 EXT3

10 NC

Description

Front input terminal of 1ch

Front input terminal of 2ch

Rear input terminal of 1ch

Rear input terminal of 2ch

External input terminal of 1ch

External input terminal of 2ch

External input terminal of 3ch

VCC

Volume★

Independent
control

Terminal

No.

11 OU T R 2

12 OUTR1

13 OUTF2

14 OUTF1

15 VCC

16 CS

17 SCL

18 SDA

19 GND

20 FIL

Volume★

Mixing ATT

100k

Terminal

Name

Technical Note

Volume★

Volume★

Mixing ATT

Mixing ATT

100k 100k

Description

Rear output terminal of 2ch

Rear output terminal of 1ch

Front output terminal of 2ch

Front output terminal of 1ch

Power supply terminal

Chip select terminal

2

C Communication clock terminal

I

I2C Communication data terminal

GND terminal

VCC/2 terminal

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© 2010 ROHM Co., Ltd. All rights reserved.

2011.04 - Rev.B