PANASONIC AN2018

AN2018S
Correlated Double Sampling IC
Unit:mm
0.15
0.65
■ Features
1.5±0.2
0.1±0.1
1.27
The AN2018S is used to reduce noise in CCD image sensor output signal. It performs correlated doublesampling on image signal sent from a CCD sensor to
output clearer image signal.
5.0±0.3
0.4
0.4±0.25
■ Overview
0.3
• Operating on low voltage (V CC=4.8V), consuming
little current (ICC =12.7mA typ.)
• Including a high-speed sampling circuit responding
to 510-830H CCD
• 6dB or 9dB fixed gain
• 83-dB high S/N-ratio (at 6dB output)
4.2±0.3
6.5±0.3
8-Pin SOP Package (SOP008-P-0225)
p
■ Pin Descriptions
Pin No.
Pin name
1
2
CDS output (9dB)
3
CCD signal input
4
VCC
5
Sampling pulse input (2)
6
Sampling pulse input (1)
7
GND
8
CDS output (6dB)
Blanking pulse input
■ Block Diagram
6dB OUT
GND
SP1
SP2
8
7
6
5
+
6dB
+
–
9dB
–
BLK
S/H
BIAS
S/H
50kΩ
1
2
3
4
9dB OUT
BLK
SIG.IN
VCC
■ Absolute Maximum Ratings
Parameter
Symbol
Rating
Unit
Supply voltage
VCC
5.5
V
Supply current
ICC
18
mA
mW
Power dissipation
PD
99
Operating ambient temperature Note 1)
Topr
–20 to +70
˚C
Storage temperature Note 1)
Tstg
–55 to +125
˚C
Note 1) Ta=25˚C except operating ambient temperature and storage temperature.
■Recommended Operating Range (Ta=25˚C)
Parameter
Operating supply voltage range
Symbol
Range
VCC
4.5V to 5.1V
■ Electrical Characteristics (VCC=4.8V, Ta=25±2˚C)
Parameter
Symbol
Supply current
ICC
Terminal voltage pin (3)
V3
Terminal voltage pin (8)
V8
Terminal voltage pin (1)
V1
6dB amp. gain
G1
9dB amp. gain
G2
AMP frequency characteristics *
fC
Condition
VCC=4.8V
VCC=4.8V
Pint, y=4.8V
VCC=4.8V
Pint, y=4.8V
VCC=4.8V
Pint, y=4.8V
Input level=300mVP–P
Input level=300mVP–P
min
CMR
Sampling pulse threshold (1)
VTH1
VCC=4.8V
Sampling pulse threshold (2)
VTH2
Blanking pulse high level
VTHB
VCC=4.8V
VCC=4.8V
V3=300mVP–P
max
Unit
12.7
16.2
mA
2.48
2.63
2.78
V
1.30
1.60
1.90
V
1.25
1.55
1.85
V
5.0
6.0
7.0
dB
7.8
9.0
10.2
dB
VCC=4.8V
V3=100mVP–P 10MHz
VCC=4.8V
V3=100mVP–P 10MHz
AMP common mode
rejection ratio *
typ
9.2
–3.0
dB
–35
dB
0.8
1.5
2.2
V
0.8
1.5
2.2
V
3.5
Note) The value in the above characteristics is not a guaranteed value, but reference one on design.
* The characteristics are of the amplifier itself.
V
■ Pin Descriptions
Pin No.
Pin name
DC voltage (VCC=5V)
Description
Equivalent circuit
VCC (4)
1
9dB OUT
Black level:
1.55V
•9-dB-amp. output CDS signal
•Typical 1.55V DC output
•90-Ω output impedance
8
GND (7)
H 3.5V
VCC (4)
50µA
2
BLK
1
33kΩ
1kΩ
1kΩ
50kΩ
63kΩ
GND (7)
L 0.5V
VCC (4)
75µA
3
SIG.IN
Black level:
2.6V
38kΩ
500Ω
3
200Ω
1kΩ
58kΩ
•Blanking (Hclear) pulse input (from
an AN2145 series only)
•Active high
•3.0V threshold voltage
•50kΩ input impedance
•Grounded or left open when not
used
•CCD signal input
•CCD signal must be input through
a capacitor.
•The capacitor should preferably be
0.022µF.
•2.6V typ. bias voltage
GND (7)
4
VCC
•Supply voltage
4.8V
H 2.2V
VCC (4)
300µA
5
SP2
5
28kΩ
1kΩ
20kΩ
GND (7)
L 0.8V
H 2.2V
VCC(4)
300µA
6
28kΩ
1kΩ
SP1
6
20kΩ
GND
8
6dB OUT
•Sample-hold pulse input
•Active high
•1.5V threshold voltage
•Sampling pulses are input in synchronization with the feed-through
timing of CCD signal at Pine.
GND (7)
L 0.8V
7
•Sample-hold pulse input
•Active high
•1.5V threshold voltage
•Sampling pulses are input in synchronization with the video timing
of CCD signal at Pine.
•Ground
Black level:
1.6V
Same as for Pinq.
•6-dB-amp. output CDS signal
Note) The above characteristics value, measured at VCC=5V, is not a guaranteed value, but reference one on design.