ROHM BD3452KS Technical data

*

1

Sound Processors for Home Theater System

7.1ch
Sound Processor

BD3452KS

●Description

BD3452KS is a sound processor where the functions including Input Selector, 8ch Volume and Gain Amp required for
applications such as AV receivers, home theater systems and mini-component systems are integrated into a single chip.
Adopting the BiCMOS process achieves low distortion, low noise and a wide dynamic range.

●Features

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

2) Independent 8 channels for Master Volume (0 to -99 dB, MUTE 1dB/Step)

3) Supporting 2nd room entertainment

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

5) Built-in Output Gain Amp useful for adjusting output signal voltages (0 to 15dB, 1dB/Step)

6) BD3841FS (9-input selector), BD3843FS (6-input selector) and BUS are common to be controlled simultaneously.

7) Built-in 2ch output port

8) 2-wire serial control (For both 3.3V and 5V)

●Applications

AV receivers, home theater systems and mini-component systems

●Absolute maximum ratings (Ta=25℃)

Parameter Symbol Ratings Unit

No.10081EAT01

Power Supply Voltage

Input Signal Voltage VIN VCC+0.3 to VEE-0.3 V

Power Dissipation Pd 1300 *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 Over Ta25℃, reduce at the rate of 13mW/℃. When installed on the standard board (size: 70701.6mm).

●Operating conditions

It must function normally at Ta25℃.

Parameter Symbol

Operating Supply Voltage

VCC 7.5
VEE -7.5

Ratings

Min. Typ. Max.

VCC 6.5 7 7.3
VEE -7.3 -7 -6.5

V

Unit

V

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

1/9

2010.06 - Rev.A

BD3452KS

●Electrical characteristics

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

Circuit Current

Output Voltage Gain Gv -2 0 2 dB Measure : Pin87,88

Parameter Symbol

VCC

VEE -40 -20 -

IQ

Min. Typ. Max.

Limits

- 20 40

Unit Conditions

mA No signal

Technical Note

Total Harmonic
Distortion Ratio

Maximum Output Voltage Vomax 3.6 4.2 - Vrms

Output Noise Voltage Vno - 1.4 12 µVrms

Total Output

Residual Noise Voltage Vnor - 1 8 µVrms

Cross-talk
between Channels

Cross-talk
between Selectors

Input Impedance Rin 32 47 62 kΩ

V Output Voltage Gain GVV -2 0 2 dB Measure : Pin 81,82,83,84,85,86,87,88

V Total Harmonic
Distortion Ratio

V Residual Noise Voltage VnorV - 1 8 µVrms

THD - 0.0006 0.03 %

CTC - -95 -80 dB

CTS - -95 -80 dB

THDV - 0.0006 0.03 %

Measure : Pin87,88
BW=400 to 30kHz

Measure : Pin87,88
THD=1

Measure : Pin87,88, Rg=0Ω,
BW=IHF-A

Measure : Pin87,88, Rg=0Ω,
BW=IHF-A, Volume=MUTE

Measure : Pin88(OUTFL),87 (OUTFR)
Rg=0Ω, BW=IHF-A
Reference : Pin87(OUTFR),
88(OUTFL)=1Vrms

Measure : Pin87,88
Rg=0Ω, BW=IHF-A

Measure : Pin 81,82,83,84,85,86,87,88
BW=400 to 30kHz

Measure : Pin 81,82,83,84,85,86,87,88
BW=IHF-A, Rg=0Ω,Volume=MUTE

Volume Output

Volume Setting Error VOLE1 -0.5 0 0.5 dB

Maximum Attenuation VOLmin - -115 -105 dB

Input Gain Control Range GIG 10 12 14 dB

Gain

Input

Output Gain Control Range GOG 13 15 17 dB

Output Gain Setting Error GOE -0.5 0 0.5 dB

Output Gain

R Output Impedance RoutR - 20 100 Ω Measure : Pin 44,45,46,47

R Voltage Gain GVR -2 0 2 dB

REC Out

R Total Harmonic
Distortion Ratio

Port H Output PH 4.0 4.9 5.4 V

Port

Port Output Current PI - - 1.0 mA Measure : Pin 62,63

(*) If two RECOUTs are ON, total load resistances of these two (RL) should be 10 kΩ.
* This product is not of "anti radiation design".

THDR - 0.005 0.09 %

Measure : Pin 81,82,83,84,85,86,87,88
Volume=0dB, Vin=3Vrms

Measure : Pin 81,82,83,84,85,86,87,88
Vin=3Vrms, BW=IHF-A

Measure : Pin 81,82,83,84,85,86,87,88
Input Gain=12dB, Vin=0.3Vrms

Measure : Pin 81,82,83,84,85,86,87,88
Output Gain=15dB, Vin=0.3Vrms

Measure : Pin 81,82,83,84,85,86,87,88
Output Gain=0dB, Vin=0.3Vrms

Measure : Pin 44,45,46,47
(*)RL=10kΩ

Measure : Pin 44,45,46,47
BW=400 to 30kHz, (*)RL=10kΩ

Measure : Pin 62,63
RL=10kΩ

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

2/9

2010.06 - Rev.A

BD3452KS

●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)

CL

90% 90% 90% 90%

twc

10% 10% 10%

twc

thd thdth ts tsl thl tsd

DA
DATA
LATCH

90% 90% 90%

twd

DATA DATA

twh

10%

Fig.1

Parameter Symbol

Min. Typ. Max.

Limits

90% 90%

twl

10% 10%

LATCH

Unit

Technical Note

Terminate with
LOW

Minimum Clock Width twc 1.0 - - µs

Minimum Data Width twd 1.0 - - µs

Minimum Latch Width twl 1.0 - - µs

LOW Hold Width twh 1.0 - - µs

Data Set-up Time (DATACLK) tsd 0.5 - - µs

Data Hold Time (CLKDATA) thd 0.5 - - µs

Latch Set-up Time (CLKLATCH) tsl 0.5 - - µs

Latch Hold Time (DATALATCH) thl 0.5 - - µs

Latch Low Set-up Time ts 0.5 - - µs

Latch Low Hold Time th 0.5 - - µs

2) Voltage Conditions for Control Signals

Parameter

Limits

Min. Typ. Max.

Unit Conditions

“H” Input Voltage 2.2 － 5.5 V

“L” Input Voltage 0 － 1.0 V

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

3/9

Vcc = 6.5～7.3V
VEE=-6.5～-7.3V

2010.06 - Rev.A