Preliminary
KA7307D
CDS/AGC
1
VID-97-D002
February 1997
GENERAL DESCRIPTION
The KA7307 is a bipolar monolithic integrated
circuit for CCD Color Video Camera, and then
if provides functions of Correlated Double
Sampling, Automatic Gain Control, Window
Function, and Iris Amplifier Gain Control.
FEATURES
. Correlated Double Sampling (CDS)
. Automatic Gain Control (AGC)
. Low-pass-filter and Sample-and-Hold
circuit after AGC for external A/D
converters
. Window Function
. Iris Amplifer Gain Control
. + 5V Single power supply
. Low power < 330mW
BLOCK DIAGRAM
Device
Package
Operating Temperature
KA7307D
20-SOP-300
- 20
C ~ + 75
C
CLP
COMP1
LPF
AGC S/H
BLK
GC1
CLP
SH2
SH3
SH1
XSHD
XSHP
AGC
WND
BLK
PBLK
CLP1
AGCCAP
IRISCAP
IRIS
CONT
XRS
-
+
COMP2
-
+
20
19
18
17
16
15
14
13
12
11
WND
XRS
DGND1
XSHP
XSHD
DVCC
CLP4
CLP1
PBLK
DGND2
1
2
3
4
5
6
7
8
9
10
DATA IN
IRIS OUT
PG IN
AVCC
AGC CONT
IRIS CONT
IRIS CAP
AGC CAP
AGC OUT
AGND
ORERING INFORMATION
20 - SOP - 300
Preliminary
KA7307D
CDS/AGC
2
VID-97-D002
February 1997
PIN DESCRIPTIONS
No.
Symbol
I/O
Pin Voltage
Description
1
PG IN
I
Black Level
2.3V ~ 2.9V
CCD Signal Input
2
DATA IN
I
( Typ. : 2.6V )
3
AVCC
I
Typ. : 5.0V
Supply Voltage
4
AGC CONT
I
OV ~ 5V
AGC Gain Control
5
IRIS CONT
I
GAIN CONTROL
IRIS Gain Control
6
IRIS CAP
O
Black Level
2.05V ~ 2.55V
( Typ. : 2.27V )
A Pin is used to attach
IRIS Clamp Capacitor
7
IRIS OUT
O
Black Level
1.2V ~ 1.7V
( Typ. : 1.45V )
IRIS Signal Output
Signal Max. : > 2.0Vp-p
8
AGC CAP
O
Black Level
2.15V ~ 2.65V
( Typ. : 2.37V )
A Pin is used to attach
IRIS Clamp Capacitor
9
AGC OUT
O
Black Level
1.2V ~ 1.7V
( Typ. 1.45V )
AGC Signal Output
Signal Max. : > 2.0Vp-p
10
AGND
O
-
Analog Ground
11
DGND2
O
-
Digital Ground 2
12
XRS
I
H : > 4V
L : < 1V
Sample - and - Hold Sig. Input
( Active Low )
13
WND
I
H : > 4V
L : < 1V
High Speed Pulse
Input Pin for WINDOW ( Active Low )
14
PBLK
I
Pre - Blanking Pulse
Input Pin ( Active Low )
15
CLP1
I
H : > 4V
L : < 1V
Clamping Pulse 1
Input Pin ( Active High )
16
CLP4
I
Clamping Pulse 4
Input Pin ( Active High )
17
DVCC
I
Typ. : 5.0V
Supply Voltage
18
XSHD
I
H : > 4V
High Speed Pulse Input
19
XSHP
I
L : < 1V
Pin for Sampling / Hold ( Active Low )
20
DGND1
O
-
Digital Ground 1
Preliminary
KA7307D
CDS/AGC
3
VID-97-D002
February 1997
ABSOLUTE MAXIMUM RATINGS
( Vcc = 5.0 V , Ta = 25
C
)
ELECTRICAL CHARACTERISTICS
( Vcc = 5.0 V , Ta = 25
C
)
Characteristics
Symbol
Value
Unit
Supply Voltage
Input Voltage
Power Dissipation
Operating Temperature
Storage Temperature
Vcc
Vi
Pd
Topr
Tstg
7
4.75 ~ 5.25
530
- 20 ~ + 75
- 65 ~ + 150
V
V
mW
C
C
Characteristics
Symbol
Test Condition
Min
Typ
Max
Unit
Supply Current
ICC
ALL PIN : OPEN
23
41
59
mA
GC1
CONT MIN
GC1C MIN
Iris out / Data in
Iris CONT = 0.0V, WND >4.0V
-
- 6
- 4
dB
CONT MAX
GC1C MAX
Iris out / Data in
Iris CONT = Vcc, WND > 4.0V
14
18
-
dB
Iris out maximum
voltage swing
CDR
Dta in = 400mVp - p
GC1 Gain max.
2.0
2.5
-
V
CG1 Amp. CMRR
CMR1
15.75KHz
-
- 50
- 36
dB
AGC
CONT MIN
AGC1 MIN
AGC out / Data in
AGC CONT = 0.0V
-
6
8
dB
CONT MAX
AGC1 MAX
AGC out / Data in
AGC CONT = Vcc
38
41
-
dB
AGC Amp. CMRR
CMRA
15.75KHz
-
- 50
- 36
dB
AGC out maximum
voltage swing
ADR
Dta in = 100mVp
-
p
AGC Gain max.
2.0
2.5
-
V
Preliminary
KA7307D
CDS/AGC
4
VID-97-D002
February 1997
OPERATING PRINCIPLES & METHODE
SAMPLE
&
HOLD
GC1
CLAMP
&
BLK
IRIS OUT
XSHP
XSHD
IRIS CONT
CLP1
PBLK
CCD
OUT PUT
SIGNAL
OUT PUT
Level
0 ~ 2.4Vpp
H>4V
L<1V
H>4V
L<1V
Data Level
0 ~ 600mVpp
Precharge Level
Data Level
Reset Noise Level
XSHP
( Precharge
Level S/H Pulse )
CCD
OUTPUT
SIGNAL
XSHD
( Data Level
S/H Pulse )
IRIS OUT
AGC OUT
1. SIGNAL FORMAT
Preliminary
KA7307D
CDS/AGC
5
VID-97-D002
February 1997
2. TIMING CHART FOR TESTING
CLP1. CLP4
PBLK. WND
DATA IN
OUT PUT
( IRIS OUT
AGC OUT )
Input Signal
20 ~ 600mVpp
H>4V
L<1V
H>4V
L<1V
Output Signal
10mVpp ~ 2.9Vpp
2us
7us
16us
16us
32us
32us
Preliminary
KA7307D
CDS/AGC
6
VID-97-D002
February 1997
CHARACTERISTICS GRAPH
( Standard Control Characteristics ; ( Vcc = 5.0 V , Ta = 25
C
)
Input Control Voltage : 0 ~ 5V
Output Gain : - 6dB ~ 18dB
Input Control Voltage : 0 ~ 5V
Output Gain : 6dB ~ 41dB
IRIS OUT / DATA IN GAIN [ dB ]
30
20
10
0
0
1
2
3
4
5
-10
IRIS CONT VOLTAGE [ V ]
50
0
40
30
20
10
0
1
2
3
4
5
AGC CONT VOLTAGE [ V ]
AGC OUT / DATA IN GAIN [ dB ]
Preliminary
KA7307D
CDS/AGC
7
VID-97-D002
February 1997
TEST CIRCUIT
CLP
LPF
AGC S/H
GC1
CLP
SH2
SH3
XSHD
XSHP
AGC
WND
BLK
CLP1 AGCCAP
IRISCAP
IRIS CONT
XRS
COMP2
-
+
-
+
COMP1
BLK
SH1
20
19
18
17
16
15
14
13
12
11
DGND1
XSHP
CLP4
XSHD
DVCC
CLP1
PBLK
WND
XRS
DGND2
SW4
SW5
SW6
SW8
SW7
SL
SR SL
SR
SL
SL
SL
SL
SR
SR
SR
SR
10uF
10
3
4
5
7
8
9
2
6
A
-
+
A
AGND
AGC OUT
IRIS CONT
IRIS OUT
V
V
IRIS CAP
AGC CAP
AGC CONT
SR
DATA IN
AVCC
SW2
0.1uF
PG IN
SL
1
V
SW1
SL
0.1uF
SR
A
0.1uF
0.1uF
A
A
A
A
A
A
A
A
10uF
-
+
V
A
Preliminary
KA7307D
CDS/AGC
8
VID-97-D002
February 1997
APPLICATION CIRCUIT
PACKAGE DIMENSION
Video Out
TIMMING
GENERATOR
KS7213
DCP
KS7306
MICOM
BUF & CLAMP
10 bit
D / A
IRIS DET.
10 bit
D / A
0.1 uF
5.0 V
DL
CCD
I. C
0 ~ 5 V
0.1 uF
0.1 uF
0.1 uF
5.0 V
0.1uF
PG IN
DATA IN
AVCC
AGC CONT
IRIS CON
IRIS CAP
IRIS OUT
AGC CAP
AGC OUT
AGND
KA7307D
20
19
18
17
16
15
14
13
12
11
DGND1
XSHP
XSHD
DVCC
CLP4
CLP1
PBLK
WND
XRS
DGND2
9
8
7
6
5
2
10
1
3
4
Preliminary
KA7307D
CDS/AGC
9
VID-97-D002
February 1997
20-SOP-300
unit: mm
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