ROHM BH7649KS2 Technical data

A

High-performance Video Signal Switchers

Video･Audio Signal Switchers
for Car Navigation Car DVD Player

BH7649KS2

●Description

BH7649KS2 is built-in video switch, audio switch and isolation amplifier in a single chip.

●Features

1) Video inputs selector: 7-inputs composite, Video outputs: 2-outputs 75Ω video driver, 2-outputs AMP

2) Built in Video gain switch (-6dB / -3dB / 0dB / 3dB)

3) Built in Video LPF switch (6.75MHz / Through)

4) Built in sag compensation circuit

5) Enables two load drivers

6) Video driver: Able to be used without load

7) Video driver : Able to be used without output coupling capacitor(one load)

8) Audio inputs selector: 5-inputs(Lch, Rch), Audio outputs : 2-outputs(Lch, Rch)

9) Built in Audio gain switch (0dB / -6dB)

10) Built in Audio LPF switch (24kHz / Through)

11) Built in MUTE function

12) Audio/Video all inputs: Built in isolator function

13) Selectable isolator function for different Audio/Video input channels

14) Serial control with I

15) Optional Slave address modifications (90H / 92H)

●Applications

Car navigation, Car DVD

●Absolute maximum ratings (Ta=+25℃)

2

C-BUS (I2C-BUS is compatible with fast mode of Version2.0)

No.11066EAT05

Parameter Symbol Ratings Unit

Supply voltage VVcc VVccmax 10 V

Supply voltage AVcc AVccmax 10 V

Power dissipation Pd 1900 *1 mW

Input voltage range I2C-BUS input

(SCL, SDA)

Input voltage range Video selector, LOGIC

(VIN1, VRET1, VIN2, VRET2, VIN3, VRET3, VIN4, VRET4,
VIN5, VRET5, VIN6, VRET6, VIN7, VRET7, ADR)

Input voltage range Video driver

(VDIN1, VDIN2)

Input voltage range Audio seletor

(LIN1, ARET1, RIN1, LIN2, ARET2, RIN2, LIN3, ARET3, RIN3,
LIN4, ARET4, RIN4, LIN5, ARET5, RIN5)

V

-0.2 ～ 7.0 V

I2CIN

V

-0.2 ～ 5.1 V

IN1

-0.2 ～ VVcc+0.2 V

V

DIN1

V

-0.2 ～ AVcc+0.2 V

AIN1

Storage temperature range Tstg -55～+125 ℃

*1 When mounting on a 70mm×70mm×1.6mm 4-layer glass epoxy board
Reduced by 19mW/℃ at Ta = +25℃ or higher

●Operating conditions

Parameter

Symbol Ratings Unit

Supply voltage VVcc VVcc +7.5 ～ +9.5 V

Supply voltage AVcc AVcc +7.5 ～ +9.5 V

Operating temperature range Topr -40 ～ +85 ℃

* This product is not designed for protection against radioactive rays.

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© 2011 ROHM Co., Ltd. All rights reserved.

2011.04 - Rev.

A

BH7649KS2

●Electric characteristic (Unless otherwise specified, Ta=+25℃, VVcc=8.5V, AVcc=8.5V)

Limits

Unit Conditions

CHIP

Parameter Symbol

Min. Typ. Max.

Circuit current1 ICC1 - 34 48 mA No signal(VIDEO)

Circuit current2 ICC2 - 23 32 mA No signal(AUDIO)

-6dB GVM6V-6.4 -6.0 -5.6 dB Vin=1.0Vpp, f=100kHz

-3dB GVM3V-3.4 -3.0 -2.6 dB Vin=1.0Vpp, f=100kHz

VIDEO

Voltage gain

Frequency characteristics1
[f=6.75MHz LPF MODE]

Frequency characteristics 2_1
[THROUGH MODE_-6dB]

Frequency characteristics 2_2
[THROUGH MODE_-3dB]

Frequency characteristics 2_3
[THROUGH MODE_0dB]

Frequency characteristics 2_4
[THROUGH MODE_3dB]

Frequency characteristics 3
[VDOUT1, VDOUT2]

Maximum output level VOM

0dB GV0
3dB GV3
6dB GV6

GF11
GF12

GF2

GF2

GF2

GF2

GF3

-0.4 0.0 0.4 dB Vin=1.0Vpp, f=100kHz

V

2.6 3.0 3.4 dB Vin=1.0Vpp, f=100kHz

V

5.6 6.0 6.4 dB Vin=1.0Vpp, f=100kHz

V

-1.5 0.0 1.0 dB Vin=1.0Vpp, f=6.75MHz/100kHz

V

- -30 -20 dB Vin=1.0Vpp, f=27MHz/100kHz

V

-0.6 0.9 1.9 dB

V

-0.7 0.8 1.8 dB

V

-0.7 0.8 1.8 dB

V

-1.0 0.5 1.5 dB

V

-3.0 -0.5 1.0 dB Vin=1.0Vpp, f=15MHz

V

2.6 - - Vp-p f=10kHz, THD=1.0%

V

Cross talk CTV - -60 -50 dB Vin=1.0Vpp, f=4.43MHz

MUTE attenuation MTV - -60 -50 dB Vin=1.0Vpp, f=4.43MHz

Common mode rejection ratio CMRR - -60 -40 dB Vin=1Vpp, f=20kHz

Voltage gain

0dB GV0

-6dB GV6

Frequency characteristics 1
[f=24kHz LPF MODE]

Frequency characteristics 2
[THROUGH MODE]

GF11
GF12

GF2

-0.4 0.0 0.4 dB Vin=1Vrms, f=1kHz

A

-6.4 -6.0 -5.6 dB Vin=1Vrms, f=1kHz

A

-2.0 -0.5 1.0 dB Vin=1Vrms, f=24kHz/1kHz

A

- -26 -15 dB Vin=1Vrms, f=96kHz/1kHz

A

-1.0 0.0 1.0 dB Vin=1Vrms, f=50kHz/1kHz

A

Total harmonic distortion THD+N - 0.002 0.1 % Vin=1Vrms, f=1kHz ※1

AUDIO

Maximum output level VOM

Cross talk CTA - -100 -85 dB Vin=2Vrms, f=1kHz ※1

2.0 2.4 - Vrms f=1kHz, THD<0.3% ※1

A

MUTE attenuation MTA - -100 -85 dB Vin=2Vrms, f=1kHz ※1

Residual noise1
[THROUGH MODE]

Residual noise2
[f=24kHz LPF MODE]

NA - 10 - uVrms

N

A_LPF

- 20 - uVrms

Common mode rejection ratio CMRR - -70 -40 dB Vin=1Vrms, f=1kHz

PSRR PSRR

- -50 - dB ※3

A

[SCL,SDA]

VIL ※4 Vin1L 0 - 1.0 V Low Level input voltage

VIH ※4 Vin1H 2.0 - 5.5 V High Level input voltage

Input bias current IINI2C -10 0 10 uA

I2C

SDA output voltage VoL 0 - 0.4 V at 3.0mA sink current

[ADR]

VIL Vin2L 0 - 1.0 V Low Level input voltage

VIH Vin2H 2.0 - 5.1 V High Level input voltage ※5

Input impedance ZIN

※1 400HzHPF + 30kHzLPF ON
※2 IHF-A Filter ON
※3 Vin=0.3Vpp, f=100Hz at VCC, 30kHzLPF ON

2

C-BUS(SCL,SDA) SPEC> VIL:-0.5[V]～0.3VDD[V], VIH:0.7 VDD[V]～VDD+0.5 or 5.5[V] (VDD:I2C-BUS_Supply voltage)

※4 <I
<BH7649KS2> Be sure to use as VIL:0.0[V]～1.0[V], VIH:2.0[V]～5.5[V]
※5 We recommend that it is connect ADR Pin to 38Pin(VREG Pin) when ADR Pin is used as “H”.

70 100 130 kΩ Pull-Down Resister

ADR

Technical Note

Vin=1.0Vpp, f=10MHz/100kHz
Gain=-6dB

Vin=1.0Vpp, f=10MHz/100kHz
Gain=-3dB

Vin=1.0Vpp, f=10MHz/100kHz
Gain=0dB

Vin=1.0Vpp, f=10MHz/100kHz
Gain=3dB

(THROUGH MODE select)
※2

LOUT1, ROUT1(LPF select)
※2

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© 2011 ROHM Co., Ltd. All rights reserved.

2011.04 - Rev.

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BH7649KS2

●Block Diagram (Audio block)

LIN1 2

ARET1 3

RIN1 4

Bias

Bias

Bias

LIN2 6

Bias

ARET2 7

RIN2 8

Bias

Bias

LIN3 10

ARET3 11

RIN3 12

Bias

Bias

Bias

LIN 4 14

ARET4 15

RIN4 16

Bias

Bias

Bias

LIN5 18

ARET5 19

RIN5 20

Bias

Bias

Bias

ABIAS 5

Audi o_SEL1

MUTE

MUTE

Audio_SEL2

MUTE

MUTE

BIAS

Fig.1 Block Diagram

LPF_Au dio

LPF_Au dio

Technical Note

Audio_Gain1

0/-6dB

0/-6dB

Audio_Gain2

0/-6dB

0/-6dB

13 AVcc

9 AGND

22 LOUT1

23 ROUT1

24 LOUT2

25 ROUT2

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© 2011 ROHM Co., Ltd. All rights reserved.

2011.04 - Rev.

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BH7649KS2

●Block Diagram (Video block)

VIN1
VIN2
VIN3
VIN4
VIN5
VIN6
VIN7

Bias

39

Bias

41
43

Bias

Bias

45
47

Bias

49

Bias

51

Bias

VRET1

VRET2
VRET3

VRET4
VRET5
VRET6
VRET7

42

Bias

Bias

44

Bias

46

Bias

48

Bias

50
52

Bias

Bias

40

VBIAS

21

VREG

38

ADR

SDA

SCL

17

36

37

BIAS2

VREG

LOGIC

Video_SEL1

MUTE

MUTE

Video_SEL2

MUTE

MUTE

Fig.2 Block Diagram

LPF_Video1

LPF_Video2

6dB

6dB

Video_Gain1

-6/-3/
0/3dB

Clamp/Bias1

75Ω

Video_Gain2

-6/-3/
0/3dB

Clamp/Bias2

75Ω

Technical Note

VVcc

26

31

VGND1

VGND2

1

VOUT1

35

34 VDIN1

VDOUT1

27

28 VDSAG1

VOUT2

33

VDIN2

32

VDOUT2

29

30

VDSAG2

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© 2011 ROHM Co., Ltd. All rights reserved.

2011.04 - Rev.