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

www.rohm.com

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

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

www.rohm.com

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

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

www.rohm.com

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

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

www.rohm.com

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

4/10

2010.06 - Rev.A