Compact Video Driver Series for DSCs and Portable Devices
Ultra-compact Waferlevel
Chip Size Packeage
Output Capacitor-less
Single Output Video Drivers
BH76906GU, BH76909GU, BH76912GU, BH76916GU, BH76706GU
No. 09064EAT01
●Description
Due to a built-in charge pump circuit, this video driver does not require the large capacity tantalum capacitor at the video
output pin that is essential in conventional video drivers. Features such as a built-in LPF that has bands suited to mobile
equipment, current consumption of 0
μA
at standby, and low voltage operation from as low as 2.5 V make it optimal for
digital still cameras, mobile phones, and other equipment in which high density mounting is demanded.
●Features
1) WLCSP ultra-compact package (1.6 mm x 1.6 mm x 0.75 mm)
2) Improved noise characteristics over BH768xxFVM series
3) Four video driver amplifier gains in lineup: 6 dB, 9 dB, 12 dB, 16.5 dB
4) Large output video driver of maximum output voltage 5.2 Vpp. Ample operation margin for supporting even low
voltage operation
5) Output coupling capacitor not needed, contributing to compact design
6) Built-in standby function and circuit current of 0
μA
(typ) at standby
th
7) Clear image playback made possible by built-in 8 -order 4.5 MHz LPF
8) Due to use of bias input format, supports not only video signals but also chroma signals and RGB signals
9) Due to built-in output pin shunt switch, video output pin can be used as video input pin (BH76706GU)
●Applications
Mobile phone, digital still camera, digital video camera, hand-held game, portable media player
●Line
up matrix
Product Name
BH76906GU
BH76909GU
BH76912GU
BH76916GU
BH76706GU
●Absolute
Maximum Ratings
Parameter
Supply voltage
Power dissipation
Operating temperature range
Storage temperature range
(T
a
= 25 °C)
Symbol
V
cc
P
d
T
opr
T
stg
Rating
3.55
580
-40½+85
-55½+125
Unit
V
mW
℃
℃
Video Driver Amplifier Gain
6dB
9dB
12dB
16.5dB
6dB
Recommended
Input Level
1Vpp
0.7Vpp
0.5Vpp
0.3Vpp
1Vpp
○
―
Video Output Pin Shunt Function
＊
When mounted on a 50 mm×58 mm×1.6 mm glass epoxy board, reduce by 5.8mW/°C above Ta=+25°C.
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© 2009 ROHM Co., Ltd. All rights reserved.
1/16
2009.03 - Rev.A
BH76906GU, BH76909GU, BH76912GU, BH76916GU, BH76706GU
●Operating
Range
Parameter
Supply voltage
Symbol
V
cc
Min.
2.5
Typ.
3.0
Max.
3.45
Unit
V
Technical Note
●Electrical
Characteristics
[Unless otherwise specified, Typ. : T
a
= 25 °C, VCC = 3V]
Typical Values
Unit
Measurement Conditions
BH76909 BH76912 BH76916 BH76706
GU
GU
GU
GU
m
A
m
A
Parameter
Circuit current 1-1
Circuit current 1-2
Circuit current 2
Circuit current 3
Standby switch input current
High Level
Standby switch switching voltage
High Level
Standby switch switching voltage
Low Level
Standby switch outflow current
High Level
Standby switch outflow current
Middle Level
Standby switch outflow current
Low Level
Mode switching voltage
High Level
Mode switching voltage
Middle Level
Mode switching voltage
low Level
Voltage gain
Maximum output level
Frequency characteristic 1
Frequency characteristic 2
Frequency characteristic 3
Frequency characteristic 4
Differential gain
Symbol
I
CC1-1
I
CC1-2
I
CC2
I
CC3
I
thH1
V
thH1
V
thL1
I
thH2
I
thM2
I
thL2
BH76906
GU
15.0
17.0
0.0
－
45
1.2V
min
0.45V
max
0
8
23
μA
100
μA
μA
－
V
V
μA
μA
μA
V
V
V
dB
V
pp
dB
dB
dB
dB
%
In active mode (No signal)
In active mode
(Outputting NTSC color bar
signal)
In standby mode
In input mode (Applying B3 =
1.5 V)
Applying B3 = 3.0 V
Active mode
Standby mode
Applying B3 = 3.0 V
Applying B3 = 1.5 V
Applying B3 = 0 V
Standby mode
Input mode
Active mode
Vo=100kH
z
, 1.0V
pp
f=10kH
z
,THD=1%
f=4.5MH
z
/100KH
z
f=8.0MH
z
/100KH
z
f=18MH
z
/100KH
z
f=23.5MH
z
/100KH
z
V
o
=1.0V
p
-
p
Inputting standard staircase
Signal
V
o
=1.0V
p-p
Inputting standard staircase
signal
100 kH
z
½6MH
z
band
Inputting 100％ white video signal
－
V
thH2
V
thM2
V
thL2
G
V
V
omv
G
f1
G
f2
G
f3
G
f4
D
G
6.0
9.0
-0.2
-1.5
-26
-44
0.5
12.0
5.2
16.5
VCC
-0.2
(MIN.)
VCC/2
(TYP.)
0.2
(MAX.)
6.0
-0.2
-1.4
-28
-48
Differential phase
Y signal to noise ratio
C AM signal to noise ratio
C PM signal to noise ratio
Current able to flow into output pin
Output DC offset
Input impedance
Output pin shunt switch
on resistance
D
P
SN
Y
SN
CA
SN
CP
lextin
Voff
Rin
Ron
－
+74
+77
+73
+76
1.0
+70
+75
+65
30
±50
max
150
3
+70
+75
+74
+77
deg
dB
dB
dB
mA
mV
kΩ
Ω
100½500 kH
z
band
Inputting 100％ chroma video signal
100½500 kH
z
band
Inputting 100％ chroma video signal
Applying 4.5 V to output pin
through 150
Ω
With no signal
Voff = (Vout pin voltage)
÷
2
Measure inflowing current when
applying A3 = 1 V
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© 2009 ROHM Co., Ltd. All rights reserved.
2/16
2009.03 - Rev.A
BH76906GU, BH76909GU, BH76912GU, BH76916GU, BH76706GU
●Test
Circuit Diagram
Technical Note
A
10u
VCC
C_PLUS
A1
IN
CHARGE
50Ω
1.0uF
B1
C_MINUS
6/9/12/16.5dB
NVCC
C1
V
1.0uF
C2
GND
V
NVCC
VOUT
C3
75Ω
V
75Ω
V
NVCC
C1
1.0uF
NVCC
PUMP
OUT
LPF
150k
STBY
B3
A
B1
C_MINUS
SW2
6dB
SW1
1.0uF
A2
VIN
A3
C_PLUS
0.1u
A
A1
IN
CHARGE
PUMP
OUT
LPF
150k
A2
0.01u
A
(VCC)
10u
VCC
0.01u
A
(VCC)
VIN
A3
0.1u
A
50Ω
STBY
B3
A
100Ω
V
V
VOUT
C3
C2 GND
V
75Ω
V
75Ω
(a) BH76906/09/12/16GU
Fig. 1
※
(b) BH76706GU
A test circuit is a circuit for shipment inspection and differs from an application circuit example.
●Block
Diagram
VCC
A2
VIN
A3
IN
CHARGE
PUMP
OUT
B1
C_MINUS
6/9/12/16.5dB
NVCC
C1
C2
GND
NVCC
VOUT
C3
NVCC
C1
C2 GND
NVCC
LPF
150k
STBY
B3
B1
C_MINUS
C_PLUS
A1
IN
CHARGE
PUMP
OUT
LPF
150k
STBY
B3
VCC
A2
VIN
A3
C_PLUS
A1
SW2
6dB
SW1
VOUT
C3
(a) BH76906/09/12/16GU
Fig. 2
(b) BH76706GU
●Operation
Logic
BH769xxGU
STBY Pin Logic
H
L
OPEN
Operating Mode
Active
Standby
BH76706GU
STBY Pin Logic
H
M
L
Operating Mode
Standby
Input (Record)
Active (Playback)
SW1
OFF
ON
OFF
SW2
OFF
OFF
ON
※Use
of the BH76706GU with the STBY pin OPEN is inappropriate
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© 2009 ROHM Co., Ltd. All rights reserved.
3/16
2009.03 - Rev.A
BH76906GU, BH76909GU, BH76912GU, BH76916GU, BH76706GU
●Pin
Descriptions
Pin
Ball
Name
Technical Note
Pin Internal Equivalent Circuit Diagram
VCC
VCC
DC
Voltage
Functional Description
A1
C_PLUS
Flying capacitor “+” pin
C_PLUS
C1
+VCC
↑↓
0V
See functional descriptions of 7pin,
8pin
GND
GND
NVCC
A2
VCC
VCC
VCC
VCC pin
Video signal input pin
0V
A3
VIN
VIN
100
3.9k
4 . 1k
3.9k
4 . 1k
VIN
1μF
Suitable input signals include
composite video signals,
chroma signals, R.G.B. signals
ACTIVE/STANBY switching pin
Pin Voltage
MODE
1.2 V½VCC
ACTIVE
(H)
0 V½0.45 V
STANBY
(L)
150k
150K
NVCC
NV
VCC
VCC
BH769xxGU
STBY
50K
250K
200K
GND
GND
B3
STBY
BH76706GU
100K
vcc
vcc
VCC
to
0V
200K
MODE switching pin
Pin Voltage
2.8 V½VCC
(H)
1.3 V½1.7 V
(M)
0 V½0.2 V
(L)
MODE
STANBY
GND
STBY
vcc
GND (Record)
ACTIVE
(Playback)
200K
GND
GND
NVCC
VCC
VCC
Video signal output pin
C3
VOUT
NVCC
NVCC
GND
VOUT
0V
VOUT
75Ω
75Ω
BH76706GU only
1K
VCC
C2
GND
NVCC
GND
0V
GND pin
Note 1) DC voltages in the figure are those when VCC
＝
3.0 V. Moreover, these values are reference values which are
not guaranteed.
Note 2) Numeric values in the figure are settings which do not guarantee ratings.
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4/16
2009.03 - Rev.A
BH76906GU, BH76909GU, BH76912GU, BH76916GU, BH76706GU
Technical Note
Flying capacitor “-“ pin (8pin)
VCC
GND
C1
NVCC
VCC
C_MINUS
C2
C1
-VCC
(-2.75 V)
0V
GND
VCC
VCC
C2
0V
↑↓
-VCC
(-2.75 V)
B1
C_MINUS
NVCC
NVC
NVC
Negative voltage pin (7pin)
Note 1) DC voltages in the figure are those when VCC
＝
3.0 V. Moreover, these values are reference values which are
not guaranteed.
Note 2) Numeric values in the figure are settings which do not guarantee ratings.
●Description
of Operation
1) Principles of output coupling capacitorless video drivers
Single-supply amplifier
VCC
Output capacitor required since DC
voltage is occurring at output pin
75Ω
1000μF
75Ω
-VCC
1/2 V
CC
bias
Fig.3
Fig.4
Dual-supply amplifier
VCC
Output capacitor not required since
DC voltage does not occur at output
pin
75Ω
75Ω
For an amplifier operated from a single power supply (single-supply), since the operating point has a potential of
approximately 1/2 Vcc, a coupling capacitor is required for preventing direct current in the output. Moreover, since the
load resistance is 150
Ω
(75
Ω
+ 75
Ω)
for the video driver, the capacity of the coupling capacitor must be on the order of
1000
μF
if you take into account the low band passband. (Fig.3)
For an amplifier operated from dual power supplies (+ supply), since the operating point can be at GND level, a coupling
capacitor for preventing output of direct current is not needed.
Moreover, since a coupling capacitor is not needed, in principle, there is no lowering of the low band characteristic at the
output stage. (Fig.4)
2) Occurrence of negative voltage due to charge pump circuit
A charge pump, as shown in Fig. 5, consists of a pair of switches (SW1, SW2) and a pair of capacitors (flying capacitor,
anchor capacitor). Switching the pair of switches as shown in Fig. 5 causes a negative voltage to occur by shifting the
charge in the flying capacitor to the anchor capacitor as in a bucket relay.
In this IC, by applying a voltage of +3 V, a negative voltage of approximately -2.8 V is obtained.
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5/16
2009.03 - Rev.A
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