BD3433K-E2 [ROHM]

6ch Electronic Volume for 5.1ch Car Theater;


型号：	BD3433K-E2
厂家：	ROHM
描述：	6ch Electronic Volume for 5.1ch Car Theater
文件：	总25页 (文件大小：2317K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Datasheet

6ch Electronic Volume for 5.1ch Car Theater

BD3433K

General Description

Key Specifications

BD3433K is a 6ch electronic volume device for 5.1ch

Car Theater. It incorporates various functions such as

6ch input selector (front/rear independently-controlled),

input gain amp (front/rear independently-controlled),

6ch independently-controlled electronic volume

(capable of soft switching), 6ch output gain amp (2-line

outputs), differential input for monophonic signals,

electronic volume for monophonic signals (capable of

soft switching), and mixing circuit for monophonic

signals. It also provides high performance functions to

achieve low distortion, low noise and a high voltage

output of 5.6Vrms. QFP44 package which offers

savings in space and components is used to be suited

for applications such as car audio and car navigation.



VCC Power Supply Voltage Range: 7.0V to 9.5V

VEE Power Supply Voltage Range: -9.5V to -7.0V

Total Harmonic Distortion:

Maximum Input Voltage:

Cross-talk Between Channels:

Output Noise Voltage:

Residual Output Noise Voltage:

VCO Oscillation Frequency:

Operating Temperature Range:

0.001%(Typ)

4.25Vrms(Typ)

106dB(Typ)

2.5µVrms(Typ)

2µVrms(Typ)

400kHz(Typ)

-40°C to +85°C

Package

W(Typ) x D(Typ) x H(Max)

Features



High output voltage of 5.6Vrms is achievable

Provided with 2 lines of outputs to the built-in

power amp and the pre-out.



Reduces volume switching noise by installing

the advanced 6ch independently-controlled

electronic volume with soft switching.

QFP44

14.00mm x 14.00mm x 2.25mm



High performance capabilities such as low

distortion rate (0.001%), low noise (3µVrms)

Different signals from different sources can be

outputted to the front and rear sections

independently and this provides an option of

rear-seat entertainment.



Incorporates monophonic differential input circuit

suited for inputting navigation voice and telephone

speech.

These monophonic voices can be mixed with the

front output signals.



Energy-saving design resulting in low current

consumption, by utilizing the Bi-CMOS process.

It has the advantage in quality over scaling down

the power heat control of the internal regulators.

3-wire serial interface supported for both of 3.3V

and 5V microcomputers.

Applications

For car audio equipment, car navigation equipment,

and hybrid systems.

○Product structure：Silicon monolithic integrated circuit ○This product has no designed protection against radioactive rays

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Typical Application Circuit

4.7µ 4.7µ

4.7µ 4.7µ 4.7µ

4.7µ 4.7µ

4.7µ

4.7µ 4.7µ

4.7µ

22 OUTAFL

DGND

SDA

4.7µ

SOUTRR

SOUTRL

SCK

19 AGND6

TEST

INBRR

1µ

ADJ

VEE

INBRL

39k

47µ

16 AGND5

15 INBSW

0.1µ

AGNDM

VCC

1µ

47µ

INBC

INEX+

INEX-

AGND4

INBFR

1µ

TOP VIEW

Pin Configuration

DGND 34

SDA 35

22 OUTAFL

21 SOUTRR

SCK 36

CS 37

20 SOUTRL

19 AGND6

18 INBRR

17 INBRL

16 AGND5

TEST 38

ADJ 39

VEE 40

AGNDM41

VCC 42

15 INBSW

14 INBC

INEX+ 43

INEX- 44

13 AGND4

12 INBFR

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Pin Descriptions

Pin Name I/O

Function

Signal series GND

Pin Name I/O

Function

AGNDE

INAFL

INAFR

AGND1

INAC

OUTAFR

OUTAC

Signal output A for front R ch

Signal output A for center ch

Signal output A for subwoofer ch

Signal output A for rear L ch

Signal output A for rear R ch

Signal output B for front L ch

Signal output B for front R ch

Signal output B for center ch

Signal output B for subwoofer ch

Signal output B for rear L ch

Signal output B for rear R ch

Digital series ground

Signal input A for front L ch

Signal input A for front R ch

Signal series GND

OUTASW

OUTARL

OUTARR

OUTBFL

OUTBFR

OUTBC

Signal input A for centre

Signal input A for subwoofer

Signal series GND

INASW

AGND2

INARL

INARR

AGND3

INBFL

INBFR

Signal input A for rear L ch

Signal input for A rear R ch

Signal series GND

OUTBSW

OUTBRL

OUTBRR

DGND

Signal input B for front L ch

Signal input B for front R ch

Micro controller interface

(serial data signal input)

Micro controller interface

(serial clock signal input)

Micro controller interface

(chip select signal input)

AGND4

INBC

Signal series GND

SDA

SCK

Signal input B for center

INBSW

AGND5

INBRL

Signal input B for subwoofer

Signal series GND

TEST

ADJ

Testing terminal

VCC oscillating frequency

adjustment

Signal input B for rear L ch

INBRR

AGND6

Signal input B for rear R ch

Signal series GND

VEE

AGNDM

VCC

Power (negative voltage) input

Analog series GND

SOUTRL

SOUTRR

OUTAFL

Signal output for rear L ch

Signal output for rear R ch

Signal output A for front L ch

Power (positive voltage) input

Monaural source signal input

INEX+

INEX-

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Block Diagram

SoftꢀSwitching

13.5K

INEX+

INEX-

OUTAFL

OUTAFR

OUTAC

＋

Volume

－

13.5K

Mixing

on/off

Front

Input

13.5K

Seｌector

Output

Gain A

(0,+2.5dB)

INAFL

INAFR

INAC

Volume

100k

OUTASW

OUTARL

OUTARR

100k

Front

Input

Gain

INASW

INARL

INARR

(0,6,12dB)

Volume

OUTBFL

OUTBFR

OUTBC

INBFL

INBFR

INBC

100k

Output

Gain B

(0,-4.5dB)

Volume

Rear

Input

Gain

OUTBSW

OUTBRL

OUTBRR

INBSW

INBRL

INBRR

(0,6,12dB)

Rear

Input

Seｌector

Power

Supply

Digital

Control

VCO

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Absolute Maximum Ratings (Ta=25C)

Parameter

Symbol

Rating

Unit

Terminal

(Note 1)

V_CC-GND

V_EE-GND

-10

Terminal Applied Voltage

Control terminal (CS/SCK/SDA)

V_LGC

5.5

(Note 1)

(Note 2)

Power Dissipation

0.85

°C

Operating Temperature

Storage Temperature

Topr

Tstg

-40 to +85

-55 to +125

(Note 1) Maximum applied voltage based on GND.

(Note 2) Derate by 8.5mW/°C for Ta>25°C.

Mounted on (Material: FR4 glass epoxy board (beaten-copper area <3%), size:70mm x 70mm x 1.6mm)

Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open

circuit between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is

operated over the absolute maximum ratings.

Recommended Operating Conditions (Ta=25°C)

Parameter

Symbol

Terminal

V_CC-GND

V_EE-GND

Min

7.0

Typ

Max

9.5

Unit

Conditions

V_CC

(Note 1)

Power Supply Voltage

V_EE

-9.5

-9

-7.0

(Note 1) When it is within operating temperature, basic circuit function is guaranteed within operating voltage. However, setting constant and element,

voltage setting, and temperature setting are required when in operation. Other than the conditions stipulated within the range, the standard value of

electrical characteristics could not be guaranteed, while original function is retained.

Electrical Characteristics

Abbreviations:

“Giaj” : Setting value of Input gain adjustor

“Vol.Ex” : Setting value of volume for monaural signal

“Goajb” : Setting value of output gain adjustor B

“Vol” : Setting value of volume (1ch to 6ch)

“Goaja” : Setting value of output gain adjustor A

“Mix” : ON/OFF setting for mixing switch.

Measurement condition (Unless specified otherwise) :

Ta=25°C, V_CC=9V, V_EE=-9V, V_IN=1Vrms/1kHz, Load resistance=10kΩ, Load capacitance=10pF,

Giaj=0dB, Vol=0dB, Goaja=0dB, Goajb=0dB, Vol.Ex=-∞dB, Mix=OFF

1. General Characteristics

Conditions

Parameter

Current Consumption

VCO Oscillation Frequency

Symbol

I_CC

Min

Typ

Max

Unit

I_EE

-17

-9

f_VCO

400

kHz

Ripple = 0.1Vrms/ 1kHz

(Input terminal AC short)

Ripple= 0.1Vrms/ 1kHz

(Input terminal AC short)

Initialize all register data by

RRc

RRe

Ripple Rejection

Reset Operation Voltage

V_RS

3.4

V_CC＜V_RSto V_CC＞V_RS

Minimum required time to

reach 3V after VCC voltage

ON.

Required Time

for Power ON Reset

t_POR

µsec

2. Logic Circuit

Parameter

“H” Level Input Voltage

“L” Level Input Voltage

Input Clock Frequency

Symbol

V_IH

Min

2.3

Typ

Max

5.5

1.0

1.5

Unit

Terminal

CS, SCK, SDA

SCK

V_IL

f_SCK

MHz

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Electrical Characteristics – continued

3. Volume Circuit

Conditions

Parameter

Voltage Gain

Symbol

G_V

Min

-1

Typ

Max

Unit

Frequency, which drop -1dB towards

1kHz

Bandwidth

f_W

100

kHz

Slew Rate

V_IM

1.65

4.25

5.6

V/µsec

Vrms

Maximum Input Voltage

3.8

THD+N = 1% , Vol = -10dB

V_OM1

V_OM2

V_OM3

R_{IN_V}

R_OUT

Maximum Output

Voltage

THD+N = 1%

Goaja=+2.5dB

Vol = +10dB

Vrms

2.2

70k

2.5

Goajb=-4.5dB

Input Impedance

100k

130k

Output Impedance

Input Gain

Setting Value Error

Output reference is Giaj=0dB

Giaj=6dB, 12dB, V_IN=0.1Vrms

Vol=+23dB to +1dB,

-1dB to -20dB

E_GI

-1

E_V1

-1.0

+1.0

(+23dB to +1dB at

V_IN=0.1Vrms)

Volume

Setting Value Error

E_V2

E_V3

E_V4

-1.5

-2.0

-3.0

+1.5

+2.0

+3.0

Vol=-21dB to -40dB

Vol=-41dB to -60dB

Vol=-61dB to -79dB

Volume

Maximum Attenuation

V_MU

-108

-85

Vol=-∞dB (mute) , BW=20Hz to 20kHz

E_GOA

-1

Goaja=+2.5dB

Output Gain

Setting Value Error

E_GOB

-1

Goajb=-4.5dB

Gain Balance

Between Channels

Cross-talk

BW=20Hz to 20kHz

(Input terminal AC short)

CTC

V_NO

V_NR

106

2.5

Between Channels

Output Noise Voltage

BW=A-Weight Vol=0dB

(Input terminal

µVrms

Residual Output

Noise Voltage

Vol=-∞dB

AC short)

THD+N

THD

t_SS1

t_SS2

t_SS3

t_SS4

0.001

0.64

1.28

2.56

5.12

0.05

BW=20Hz to 20kHz, V_OUT=1Vrms

0.64 msec/dB

1.28 msec/dB

2.56 msec/dB

5.12 msec/dB

Soft Switching

Transition Time

msec Soft switching :

/dB

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Electrical characteristics – continued

4. Monaural Signal Circuit

Common condition unless specified otherwise :

Vol=-∞dB, Giaj=Goaja= Goajb=0dB, Vol.Ex=0dB, Mix=ON

Parameter

Symbol

Min

Typ

Max

Unit

Conditions

Phase inversion between input and

output

Voltage Gain

G_Ve

-1.0

+1.0

Maximum Input

Voltage

V_IMe

R_INe

3.8

4.25

Vrms

THD+N=1%, Vol.Ex=-10dB

Input Impedance

kΩ

Vol=+15dB to +1dB,

-1dB to -20dB,

(+15dB +1dB at

V_IN=0.1Vrms)

E_Ve1

-1.0

+1.0

Volume Setting Value

Error

E_Ve2

E_Ve3

E_Ve4

-1.5

-2.0

-3.0

+1.5

+2.0

+3.0

Vol=-21dB to -40dB

Vol=-41dB to -60dB

Vol=-61dB to -63dB

Volume

Maximum Attenuation

Vol.Ex=-∞dB (mute) ,

BW=20Hz to 20kHz

V_MUe

V_NOe

-108

4.5

-85

BW=A-Weight

(Input

Output Noise Voltage

Vol.Ex = 0dB

µVrms

Residual Noise

Voltage

terminal AC

short)

V_NRe

3.5

Vol.Ex = -∞dB

THD+N

THDe

0.002

0.05

BW=20Hz to 20kHz, V_OUT=1Vrms

Common-Mode

Signal Rejection Ratio

CMRR

BW=20Hz to 20kHz

t_SSE1

t_SSE2

t_SSE3

t_SSE4

0.64

1.28

2.56

5.12

0.64 msec/dB

1.28 msec/dB

2.56 msec/dB

5.12 msec/dB

Soft Switching

Transition Time

msec

/dB

Soft

switching: ON

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Application Information

1. Control Signal Specification

(1) Timing Chart

t_SSC

t_SCS

t_WHS

t_SDC

t_WHCt_WLC

SCK

t_HCD

D14

D13

D12

SDA

D15

MSB

LSB

Item

Symbol Min

Typ

Max Unit

Input Clock Frequency

SCK “High” Interval Width

SCK “Low” Interval Width

CS “High” Interval Width

f_SCK

t_WHC

t_WLC

t_WHS

t_SSC

t_SCS

t_SDC

t_HCD

1.5

MHz

nsec

200

400

CS↓－SCK↓ (Condition of Starting Data Transmission) Set up Time

SCK↓－CS↓ (Condition of Starting Data Transmission) Set up Time

SDA－SCK↑ (Condition of Starting Data Receiving) Set up Time

SCK↑－SDA (Condition of Starting Data Receiving) Hold Time

(a) When CS is “Low”, micro computer control data (SCK/SDA) is enabled. (It doesn’t work when CS is “High”),

(b) Data (SDA) is read at the leading edge of clock (SCK).

(d) Timing where * mark is not guaranteed by the delivery inspection, but theoretical values on IC design.

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(2) Control Data Format Basic Structure Table

(“x” ･･･ don’t care bit. Either 0 or 1)

(MSB)

Data Transmission Description (Command + Setting data =16 bit)

(LSB)

Command

No.

Command name

Backup area

Command

D15 D14 D13 D12 D11 D10 D9

Function Description

D6 D5 D4 D3 D2 D1 D0

Selector

Input gain

Output gain

OutputOutput

Gain Gain

Input

Sel

Rear

Input

Input Input

Sel

Front

Gain

Rear

Gain

Front

Backup area

Mix Mix Transition Switching

Monaural Signal

Volume gain

FRchFLch

Time

Pattern

Backup area

Test sequence

Volume Front

Lch

Volume Front

Rch

Volume Center

Transition Switching

Time Pattern

Transition Switching

Time Pattern

Transition Switching

Time Pattern

Transition Switching

Time Pattern

Transition Switching

Time Pattern

Transition Switching

Volume gain

Volume

Subwoofer ch

Volume Rear

Lch

Volume Rear

Rch

time

Pattern

Backup area

In changing command setting value, enable to select command from No.0 to No.15

Transmission has to be every 16bit as above format.

(3) Initial Value when Power Source is ON.

When power is ON, built-in power on reset circuit initializes setting data to bit “0” (Low) within the IC. However, just in

case of set design stage, initial data has to be sent to all addresses when turning power ON, and mute setting is

recommended during this initial data transmission.

(4) Preventive Measure for Malfunction by Electrostatic Surge

The IC’s logic circuit has shift registers to retain 16bit serial data which is external input from micon etc. The data,

which is retained by shift registers, will be synchronized with CS signal leading edge, then is latched to each

function. Therefore, if electrostatic surge is applied to the logic signal terminal (CS, SCK, SDA), inappropriate latch

may cause malfunction of internal circuit. As a preventive measure for malfunction, 0000(hex) data transmission for

command No.0 (backup area), at the end of every data transmission to specific command to initialize shift register

in the IC is recommended.

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(5) Command No.1 “Selector, Input Gain, Output Gain” Setting Data Chart

(“x” ･･･ Either 0 or 1)

(MSB) Transmission data (command + Setting data =16bit) (LSB)

Command Setting data

D15D14D13D12D11D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Function

Setting

Command

Input gain

Front ch

Center ch

Subwoofer ch

(Initial value) 0 dB

0 dB

↑

+6 dB

+12 dB

Input selector

Front ch

(Initial value)

Input A

↑

Center ch

Subwoofer ch

Input B

(Initial value) 0 dB

0 dB

Input Gain Rear ch

+6 dB

+12 dB

(Initial value)

Rear input A

Input selector Rear

Rear input B

Front input A

↑

Front input B

(Initial value) 0 dB

+2.5 dB

(Initial value) 0 dB

-4.5 dB

Output gain A

Output gain B

↑

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(6) Command No.3 “Monaural signal circuit” Setting Data Chart

(MSB) Transmission data (command + setting data=16bit)

Command Setting data

D15 D14D13D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

(LSB)

Function

Command

Setting data

(Initial value）

-∞dB(MUTE)

：

+15 dB

：

+14 dB

+13 dB

+12 dB

：

+9 dB

+8 dB

+7 dB

：

+2 dB

+1 dB

0 dB

-1 dB

-2 dB

Volume gain

↑

：

-7 dB

-8 dB

-9 dB

：

-40 dB

-41 dB

：

-62 dB

-63 dB

Else

-∞dB（MUTE）

(Initial value)

Secondary

Volume switching

pattern

↑

Soft switching

(Initial value)

0.64(msec/dB)

1.28 (msec/dB)

2.56 (msec/dB)

5.12 (msec/dB)

(Initial value) OFF

Volume switching

transition time

Mixing Front Lch

Mixing Front Rch

↑

(Initial value) OFF

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(7) Command No.8

“Volume front L ch”

“Volume front R ch”

“Volume center ch”

“Volume subwoofer ch”

“Volume rear L ch”

“Volume rear R ch”

Command No.9

Command No.10

Command No.11

Command No.12

Command No.13

Setting data chart

Function

( “x” ･･･ Either 0 or 1)

(MSB) Transmission data (command + setting data=16bit) (LSB)

Command Setting data

D15 D14D13D12D11D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Setting

Volume FL ch

Volume FR ch

Volume C ch

Volume SW ch

Volume RL ch

Volume RR ch

(Initial Value) -∞dB(MUTE)

+23 dB

Command

+22 dB

+21 dB

：

+9 dB

+8 dB

+7 dB

：

+2 dB

+1 dB

0 dB

↑

-1 dB

-2 dB

Volume gain

：

-7 dB

-8 dB

-9 dB

：

-40 dB

-41 dB

：

-78 dB

-79 dB

Else

-∞dB（MUTE）

(Initial value)

Secondary

Volume switching

Pattern

↑

Soft switching

(Initial value)

0.64 (msec/dB)

1.28 (msec/dB)

2.56 (msec/dB)

5.12 (msec/dB)

Volume switching

transition time

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2. Application Circuit Example

4.7µ 4.7µ

4.7µ 4.7µ 4.7µ

4.7µ 4.7µ

4.7µ

4.7µ 4.7µ

4.7µ

22 OUTAFL

DGND

SDA

4.7µ

SOUTRR

SOUTRL

SCK

19 AGND6

TEST

INBRR

1µ

ADJ

VEE

INBRL

39k

47µ

16 AGND5

15 INBSW

0.1µ

AGNDM

VCC

1µ

47µ

INBC

INEX+

INEX-

AGND4

INBFR

1µ

UNIT

RESISTANCE : Ω

CAPACITANCE : F

1µ

【1：Oscillation countermeasure】

・Using higher capacity than 10pF may cause oscillation.

As oscillation countermeasure, insert series resistor to terminal directly as below.

Terminal Direct-mount

type Series resister

Resistor for oscillation countermeasure

Capacity

C < 10pF

（Not necessary）

100Ω

Output

terminal

10pF < C < 100pF

100pF < C < 1000pF

(Coupling capacitor)

100Ω

【2：Mounting pattern】

・Wire a GND line to the GND point which becomes a standard by the independence.

・Wiring pattern of CS, SCK and SDA should be away from the analog lines to avoid cross-talk.

・Input lines should not be parallel if possible. The lines should be shielded, if they are adjacent to each other.

・Please connect the resistor (39kΩ) for adjusting VCO frequency to ADJ terminal in the shortest distance possible.

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(1) Volume Control Description

(Bold with underline is initial setting value)

(a) Volume setting value

(For 5.1ch signal)

+23dB to -79dB, –∞dB(mute), 1dB/step

+15dB to -63dB, –∞dB(mute), 1dB/step

(For Monaural signal)

(b) Selection of switching formula：

Secondary switching, soft switching

0.64 / 1.28 / 2.56 / 5.12 [msec/dB] （*）

Transition time of soft switching

Fresh setup

Transition per dB is fixed, is not

affected by changing of volume.

(1dB)

Present setup

GND

(2) In case of receiving following setting command during volume changing

Terminate current transition and start next transition.

Switching volume can be done with only 1dB/step, so termination or restart of transition is on timing of

1dB/step basis.

1dB interval

0.64msec

1dB interval

2.56msec

[dB]

-18

-19

-20

-21

-22

-23

-24

-25

-26

-27

-28

-29

-30

-31

（ time ）→

Order example②

［-24dB、0.64msec/dB］

Order example①

［-30dB、2.56msec/dB］

Transition image of gain setup in the volume operation .

(Figure notes) When setting command example1, volume gain drops from -20dB to -30dB with 2.56msec/dB.

In the figure, when setting command example 2 during a transition from -27dB to

-28dB, command example 2 will be set when it reaches -28dB because termination

or restart can be done every 1dB unit.

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BD3433K

I/O Equivalent Circuits

Terminal

Number

Terminal

Name

Terminal

Voltage

I/O

Terminal Equivalent Circuits

INAFL

INAFR

INAC

VCVC_CC

INASW

INARL

INARR

INBFL

INBFR

INBC

INBSW

INBRL

INBRR

100k

VEV_EE

VCC

V_CC

13.5k

INEX+

VEE

V_EE

VCC

V_CC

13.5k

INEX-

VEE

V_EE

SOUTRL

SOUTRR

OUTAFL

OUTAFR

OUTAC

OUTASW

OUTARL

OUTARR

OUTBFL

OUTBFR

OUTBC

VCC

V_CC

VEE

V_EE

OUTBSW

OUTBRL

OUTBRR

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BD3433K

I/O Equivalent Circuits – continued

Terminal

Number

Terminal

Name

Terminal

Voltage

I/O

Terminal Equivalent Circuits

VCC

V_CC

SDA

SCK

DGND

VEE

V_EE

VCC

V_CC

ADJ

0.7V

AGNDM

VEE

V_EE

VCC

V_CC

AGNDE

AGND1

AGND2

AGND3

AGND4

AGND5

AGND6

DGND

AGNDM

VEE

V_EE

VCC

V_CC

VCC

VEE

8.3V

-8.3V

VEE

V_EE

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TSZ02201-0C2C0E100610-1-2

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BD3433K

Operational Notes

Reverse Connection of Power Supply

Connecting the power supply in reverse polarity can damage the IC. Take precautions against reverse polarity when

connecting the power supply, such as mounting an external diode between the power supply and the IC’s power

supply pins.

Power Supply Lines

Design the PCB layout pattern to provide low impedance supply lines. Separate the ground and supply lines of the

digital and analog blocks to prevent noise in the ground and supply lines of the digital block from affecting the analog

block. Furthermore, connect a capacitor to ground at all power supply pins. Consider the effect of temperature and

aging on the capacitance value when using electrolytic capacitors.

VEE Voltage

Ensure that no pins are at a voltage below that of the VEE pin at any time, even during transient condition.

Ground Wiring Pattern

When using both small-signal and large-current ground traces, the two ground traces should be routed separately but

connected to a single ground at the reference point of the application board to avoid fluctuations in the small-signal

ground caused by large currents. Also ensure that the ground traces of external components do not cause variations

on the ground voltage. The ground lines must be as short and thick as possible to reduce line impedance.

Thermal Consideration

Should by any chance the power dissipation rating be exceeded the rise in temperature of the chip may result in

deterioration of the properties of the chip. In case of exceeding this absolute maximum rating, increase the board size

and copper area to prevent exceeding the Pd rating.

Recommended Operating Conditions

These conditions represent a range within which the expected characteristics of the IC can be approximately obtained.

The electrical characteristics are guaranteed under the conditions of each parameter.

Inrush Current

When power is first supplied to the IC, it is possible that the internal logic may be unstable and inrush current may flow

instantaneously due to the internal powering sequence and delays, especially if the IC has more than one power

supply. Therefore, give special consideration to power coupling capacitance, power wiring, width of ground wiring, and

routing of connections.

Operation Under Strong Electromagnetic Field

Operating the IC in the presence of a strong electromagnetic field may cause the IC to malfunction.

Testing on Application Boards

When testing the IC on an application board, connecting a capacitor directly to a low-impedance output pin may

subject the IC to stress. Always discharge capacitors completely after each process or step. The IC’s power supply

should always be turned off completely before connecting or removing it from the test setup during the inspection

process. To prevent damage from static discharge, ground the IC during assembly and use similar precautions during

transport and storage.

10.

11.

Inter-pin Short and Mounting Errors

Ensure that the direction and position are correct when mounting the IC on the PCB. Incorrect mounting may result in

damaging the IC. Avoid nearby pins being shorted to each other especially to ground, power supply and output pin.

Inter-pin shorts could be due to many reasons such as metal particles, water droplets (in very humid environment) and

unintentional solder bridge deposited in between pins during assembly to name a few.

Unused Input Pins

Input pins of an IC are often connected to the gate of a MOS transistor. The gate has extremely high impedance and

extremely low capacitance. If left unconnected, the electric field from the outside can easily charge it. The small charge

acquired in this way is enough to produce a significant effect on the conduction through the transistor and cause

unexpected operation of the IC. So unless otherwise specified, unused input pins should be connected to the power

supply or ground line.

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Operational Notes – continued

12.

Regarding the Input Pin of the IC

This monolithic IC contains P+ isolation and P substrate layers between adjacent elements in order to keep them

isolated. P-N junctions are formed at the intersection of the P layers with the N layers of other elements, creating a

parasitic diode or transistor. For example (refer to figure below):

When VEE > Pin A and VEE > Pin B, the P-N junction operates as a parasitic diode.

When VEE > Pin B, the P-N junction operates as a parasitic transistor.

Parasitic diodes inevitably occur in the structure of the IC. The operation of parasitic diodes can result in mutual

interference among circuits, operational faults, or physical damage. Therefore, conditions that cause these diodes to

operate, such as applying a voltage lower than the VEE voltage to an input pin (and thus to the P substrate) should be

avoided.

Resistor

Transistor (NPN)

Pin A

Pin B

Pin A

P⁺

Parasitic

Elements

Parasitic

Elements

P Substrate

VEE

P Substrate

VEE

GND

VEE

GND

Parasitic

Elements

Parasitic

Elements

N Region

close-by

Figure 1. Example of monolithic IC structure

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Ordering Information

B D

x x

Packaging and forming specification

E2: Embossed tape and reel

None: Tray

Part Number

Package

K: QFP44

Marking Diagram

QFP44 (TOP VIEW)

Part Number Marking

LOT Number

B D 3 4 3 3 K

1PIN MARK

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BD3433K

Physical Dimension, Tape and Reel Information

Package Name

QFP44

Unit：mm

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BD3433K

Revision History

Date

Revision

001

Changes

16.Dec.2015

New Release

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Daattaasshheeeett

Notice

Precaution on using ROHM Products

1. Our Products are designed and manufactured for application in ordinary electronic equipments (such as AV equipment,

OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you

intend to use our Products in devices requiring extremely high reliability (such as medical equipment ^{(Note 1)}, transport

equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car

accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or

serious damage to property (“Specific Applications”), please consult with the ROHM sales representative in advance.

Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any

damages, expenses or losses incurred by you or third parties arising from the use of any ROHM’s Products for Specific

Applications.

(Note1) Medical Equipment Classification of the Specific Applications

JAPAN

USA

CHINA

CLASSⅢ

CLASSⅣ

CLASSⅡb

CLASSⅢ

2. ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor

products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate

safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which

a failure or malfunction of our Products may cause. The following are examples of safety measures:

[a] Installation of protection circuits or other protective devices to improve system safety

[b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure

3. Our Products are designed and manufactured for use under standard conditions and not under any special or

extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way

responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any

special or extraordinary environments or conditions. If you intend to use our Products under any special or

extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of

product performance, reliability, etc, prior to use, must be necessary:

[a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents

[b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust

[c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2,

H2S, NH3, SO2, and NO2

[d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves

[e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items

[f] Sealing or coating our Products with resin or other coating materials

[g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of

flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning

residue after soldering

[h] Use of the Products in places subject to dew condensation

4. The Products are not subject to radiation-proof design.

5. Please verify and confirm characteristics of the final or mounted products in using the Products.

6. In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied,

confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power

exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect

product performance and reliability.

7. De-rate Power Dissipation depending on ambient temperature. When used in sealed area, confirm that it is the use in

the range that does not exceed the maximum junction temperature.

8. Confirm that operation temperature is within the specified range described in the product specification.

9. ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in

this document.

Precaution for Mounting / Circuit board design

1. When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product

performance and reliability.

2. In principle, the reflow soldering method must be used on a surface-mount products, the flow soldering method must

be used on a through hole mount products. If the flow soldering method is preferred on a surface-mount products,

please consult with the ROHM representative in advance.

For details, please refer to ROHM Mounting specification

Notice-PGA-E

Rev.002

Daattaasshheeeett

Precautions Regarding Application Examples and External Circuits

1. If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the

characteristics of the Products and external components, including transient characteristics, as well as static

characteristics.

2. You agree that application notes, reference designs, and associated data and information contained in this document

are presented only as guidance for Products use. Therefore, in case you use such information, you are solely

responsible for it and you must exercise your own independent verification and judgment in the use of such information

contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses

incurred by you or third parties arising from the use of such information.

Precaution for Electrostatic

This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper

caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be

applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron,

isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control).

Precaution for Storage / Transportation

1. Product performance and soldered connections may deteriorate if the Products are stored in the places where:

[a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2

[b] the temperature or humidity exceeds those recommended by ROHM

[c] the Products are exposed to direct sunshine or condensation

[d] the Products are exposed to high Electrostatic

2. Even under ROHM recommended storage condition, solderability of products out of recommended storage time period

may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is

exceeding the recommended storage time period.

3. Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads

may occur due to excessive stress applied when dropping of a carton.

4. Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products of

which storage time is exceeding the recommended storage time period.

Precaution for Product Label

QR code printed on ROHM Products label is for ROHM’s internal use only.

Precaution for Disposition

When disposing Products please dispose them properly using an authorized industry waste company.

Precaution for Foreign Exchange and Foreign Trade act

Since concerned goods might be fallen under listed items of export control prescribed by Foreign exchange and Foreign

trade act, please consult with ROHM in case of export.

Precaution Regarding Intellectual Property Rights

1. All information and data including but not limited to application example contained in this document is for reference

only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any

other rights of any third party regarding such information or data.

2. ROHM shall not have any obligations where the claims, actions or demands arising from the combination of the

Products with other articles such as components, circuits, systems or external equipment (including software).

3. No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of ROHM or any

third parties with respect to the Products or the information contained in this document. Provided, however, that ROHM

will not assert its intellectual property rights or other rights against you or your customers to the extent necessary to

manufacture or sell products containing the Products, subject to the terms and conditions herein.

Other Precaution

1. This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM.

2. The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written

consent of ROHM.

3. In no event shall you use in any way whatsoever the Products and the related technical information contained in the

Products or this document for any military purposes, including but not limited to, the development of mass-destruction

weapons.

4. The proper names of companies or products described in this document are trademarks or registered trademarks of

ROHM, its affiliated companies or third parties.

Notice-PGA-E

Rev.002

Daattaasshheeeett

General Precaution

1. Before you use our Pro ducts, you are requested to care fully read this document and fully understand its contents.

ROHM shall not be in an y way responsible or liable for failure, malfunction or accident arising from the use of a ny

ROHM’s Products against warning, caution or note contained in this document.

2. All information contained in this docume nt is current as of the issuing date and subj ect to change without any prior

notice. Before purchasing or using ROHM’s Products, please confirm the la test information with a ROHM sale s

representative.

3. The information contained in this doc ument is provi ded on an “as is” basis and ROHM does not warrant that all

information contained in this document is accurate an d/or error-free. ROHM shall not be in an y way responsible or

liable for any damages, expenses or losses incurred by you or third parties resulting from inaccuracy or errors of or

concerning such information.

Notice – WE

Rev.001

Datasheet

Buy

BD3433K - Web Page

Distribution Inventory

Part Number

Package

Unit Quantity

BD3433K

QFP44

1000

Minimum Package Quantity

Packing Type

Constitution Materials List

RoHS

1000

Taping

inquiry

Yes

BD3433K-E2 [ROHM]

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