SM5306A
Low Voltage, 3-channel Video Buffer
OVERVIEW
The SM5306A is a 3-channel low-voltage video buffer IC that can drive a 75Ω termination resistance load. The
output buffer gain can be switched between 0dB and 6dB. A built-in sag compensation circuit enables a lower
output coupling capacitance to be used. The device operates from a 3.0 to 5.5V supply.
FEATURES
I
I
I
PINOUT
(Top view)
I
I
I
I
I
I
I
Supply voltage: 3.0 to 5.5V
Current consumption: 24mA (V
CC
= 3.3V)
Output gain switching: 0dB (GSEL = LOW)
6dB (GSEL = HIGH)
Gain error:
±
0.5dB
Maximum passband frequency: over 20MHz
Maximum output voltage: min. 2.0Vp-p
(gain = 6dB)
Sag compensation circuit built-in
Synctip clamp input
Operating ambient temperature range: 0 to 70°C
Package: 16-pin VSOP (Pb free)
VCC1
IN1
GND1
IN2
GND2
GSEL
IN3
GND3
1
16
OFB1
OUT1
VCC2
OFB2
OUT2
VCC3
OFB3
8
9
OUT3
APPLICATIONS
I
LCD monitor
ORDERING INFORMATION
Device
SM5306AV
Package
16-pin VSOP
PACKAGE DIMENSIONS
(Unit: mm)
+0
0.15
−
.1
0.05
4.4 ± 0.2
6.4 ± 0.2
0.275TYP
5.1 ± 0.2
1.15 ± 0.1
0 to 10 °
0.10
+ 0.1
0.22
−
0.05
0.12 M
SEIKO NPC CORPORATION —1
0.10 ± 0.05
0.65
0.5 ± 0.2
SM5306A
BLOCK DIAGRAM
VCC1
OFB1
−
0dB/6dB
OUT1
IN1
CLAMP
+
GND1
VCC2
OFB2
−
0dB/6dB
OUT2
IN2
CLAMP
+
GND2
VCC3
GSEL
−
OFB3
0dB/6dB
OUT3
IN3
CLAMP
+
GND3
PIN DESCRIPTION
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1. I: input, O: output
SEIKO NPC CORPORATION —2
Name
VCC1
IN1
GND1
IN2
GND2
GSEL
IN3
GND3
OUT3
OFB3
VCC3
OUT2
OFB2
VCC2
OUT1
OFB1
I/O
1
–
I
–
I
–
I
I
–
O
O
–
O
O
–
O
O
Supply voltage
1
Video signal input 1
Ground 1
Video signal input 2
Ground 2
Gain select (LOW: 0dB, HIGH:
+
6dB)
Video signal input 3
Ground 3
Video signal output 3
Output feedback 3 (for sag compensation circuit)
Supply voltage 3
Video signal output 2
Output feedback 2 (for sag compensation circuit)
Supply voltage 2
Video signal output 1
Output feedback 1 (for sag compensation circuit)
Description
SM5306A
PIN EQUIVALENT CIRCUIT
Number
Name
Equivalent circuit
2
4
7
IN1
IN2
IN3
R
6
GSEL
R
16
13
10
OFB1
OFB2
OFB3
R
R
15
12
9
OUT1
OUT2
OUT3
SEIKO NPC CORPORATION —3
SM5306A
SPECIFICATIONS
Absolute Maximum Ratings
VCC1
=
VCC2
=
VCC3
=
V
CC
, GND
=
0V, unless otherwise noted
Parameter
Supply voltage range
Input voltage range
Storage temperature range
Power dissipation
Symbol
V
CC
V
IN
T
STG
P
D
GSEL pin
Condition
Rating
−
0.3 to 7.0
GND – 0.3 to V
CC
+ 0.3
−
55 to
+
125
250
Unit
V
V
°C
mW
Recommended Operating Conditions
Parameter
Supply voltage
Operating ambient temperature
range
Symbol
V
CC
Ta
Condition
Rating
3.0 to 5.5
0 to 70
Unit
V
°C
DC Characteristics (GSEL)
V
CC
=
3.0 to 5.5V, Ta
=
0 to 70°C, unless otherwise noted
Rating
Parameter
HIGH-level input voltage
LOW-level input voltage
Input leakage current
Symbol
V
IH
V
IL
I
LL
I
LH
V
IN
= 0V
V
IN
= V
CC
Condition
min
V
CC
– 0.5
–
–
–
typ
–
–
–
–
max
–
0.5
1
1
V
V
µA
µA
Unit
Analog Characteristics
V
CC
= 3.3V, Ta = 25°C, R
L
= 150Ω, fin = 100kHz, V
IN
= 1.0Vp-p, unless otherwise noted
See “Measurement Circuit Diagram”
Parameter
Current consumption 1
Current consumption 2
Output gain 1
Output gain 2
Channel gain error
Channel crosstalk
Maximum passband frequency 1
Maximum passband frequency 2
Input voltage
Maximum output voltage 1
Maximum output voltage 2
Input clamp voltage
Output distortion ratio
Symbol
I
CC1
I
CC2
A
V1
A
V2
dA
V
C
T
F
PB1
F
PB2
V
AIN1
V
OUT1
V
OUT2
V
CLMP
T
HD
Condition
Gain = 6dB, no signal input
V
CC
= 5.5V, Gain = 6dB,
no signal input
Gain = 0dB
Gain = 6dB
Gain = 0dB, 6dB
Gain = 6dB, ratio with V
OUT
=
2Vp-p
–1dB, gain
=
0dB
–1dB, gain
=
6dB
AC-coupled input, Gain
=
0dB, 6dB
Gain
=
0dB, THD
=
1%
Gain
=
6dB, THD
=
1%
No signal input
Gain = 6dB
Rating
min
–
–
– 0.5
5.5
–
–
20
20
–
1.0
2.0
1.15
–
typ
24
26
0
6.0
–
– 65
49
23
–
–
–
1.35
–
max
30
35
0.5
6.5
±
0.3
–
–
–
1.0
–
–
1.55
1
Unit
mA
mA
dB
dB
dB
dB
MHz
MHz
Vp-p
Vp-p
Vp-p
V
%
SEIKO NPC CORPORATION —4
SM5306A
Measurement Circuit Diagram
+
4.7µF
0.1µF
+
22µF
INPUT1
4.7µF
+
VCC1
IN1
GND1
IN2
GND2
OFB1
OUT1
VCC2
OFB2
OUT2
VCC3
OFB3
OUT3
+
+
75Ω
75Ω
0.1µF 100µF
+
22µF
+
+
INPUT2
4.7µF
+
75Ω
75Ω
INPUT3
4.7µF
+
GSEL
IN3
GND3
0.1µF 100µF
+
22µF
+
+
75Ω
75Ω
100µF
FUNCTIONAL DESCRIPTION
Output Gain Setting (GSEL)
GSEL pin
LOW
HIGH
Output gain
0dB
6dB
SEIKO NPC CORPORATION —5
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