Sony ICX274AL User manual

– 1 – E01X50C34
Sony reserves the right to change products and specifications without prior notice.This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices.Sony cannot assume responsibility for any problems arising out of the use of these circuits.
ICX274AL
20 pin DIP (Plastic)
Description
The ICX274AL is a diagonal 8.923mm (Type 1/1.8)
interline CCD solid-state image sensor with a square
pixel array and 2.01M effective pixels. Progressive
scan allows all pixels' signals to be output
independently within approximately 1/15 second,
and output is also possible using various addition
and pulse elimination methods.This chip features an
electronic shutter with variable charge-storage time
which makes it possible to realize full-frame still
images without a mechanical shutter. Further, high
sensitivity and low dark current are achieved through
the adoption of Super HAD CCD technology.
This chip is suitable for image input applications
such as still cameras which require high resolution,
etc.
Features
•High horizontal and vertical resolution
•Supports the following modes
Progressive scan mode (with/without mechanical shutter)
2/8-line readout mode
2/4-line readout mode
2-line addition mode
Center scan modes (1), (2) and (3)
AF modes (1) and (2)
•Square pixel
•Horizontal drive frequency: 28.6364MHz (typ.), 36.0MHz (max.)
•Reset gate bias are not adjusted
•High sensitivity, low dark current
•Continuous variable-speed shutter function
•Excellent anti-blooming characteristics
•20-pin high-precision plastic package
Device Structure
•Interline CCD image sensor
•Image size: Diagonal 8.923mm (Type 1/1.8)
•Total number of pixels: 1688 (H) ×1248 (V) approx. 2.11M pixels
•Number of effective pixels: 1628 (H) ×1236 (V) approx. 2.01M pixels
•Number of active pixels: 1620 (H) ×1220 (V) approx. 1.98M pixels
•Recommended number of
recording pixels: 1600 (H) ×1200 (V) approx. 1.92M pixels
•Chip size: 8.50mm (H) ×6.80mm (V)
•Unit cell size: 4.40µm (H) ×4.40µm (V)
•Optical black: Horizontal (H) direction: Front 12 pixels, rear 48 pixels
Vertical (V) direction: Front 10 pixels, rear 2 pixels
•Number of dummy bits: Horizontal 28
Vertical 1
•Substrate material: Silicon
Optical black position
(Top View)
2
10
V
H
Pin 1
Pin 11 48
12
Diagonal 8.923mm (Type 1/1.8) Progressive Scan CCD Image Sensor with Square Pixel for B/W Video Cameras

– 2 –
ICX274AL
11 12 13 14 15 16 17 18 19 20
Horizontal register
Note)
V
DD
φRG
Hφ
2B
Hφ
1B
GND
φSUB
C
SUB
V
L
Hφ
1A
Hφ
2A
10 9 8 7 6 5 4 3 2 1
V
OUT
GND Vφ
1
Vφ
2C
Vφ
2B
Vφ
2A
Vφ
3C
Vφ
3B
Vφ
3A
Vφ
4
Vertical register
Note) : Photo sensor
Block Diagram and Pin Configuration
(Top View)
Pin Description
∗1DC bias is generated within the CCD, so that this pin should be grounded externally through a capacitance of
0.1µF.
Pin No. Symbol Description Pin No. Symbol Description
1
2
3
4
5
6
7
8
9
10
Vφ4
Vφ3A
Vφ3B
Vφ3C
Vφ2A
Vφ2B
Vφ2C
Vφ1
GND
VOUT
Vertical register transfer clock
Vertical register transfer clock
Vertical register transfer clock
Vertical register transfer clock
Vertical register transfer clock
Vertical register transfer clock
Vertical register transfer clock
Vertical register transfer clock
GND
Signal output
11
12
13
14
15
16
17
18
19
20
VDD
φRG
Hφ2B
Hφ1B
GND
φSUB
CSUB
VL
Hφ1A
Hφ2A
Supply voltage
Reset gate clock
Horizontal register transfer clock
Horizontal register transfer clock
GND
Substrate clock
Substrate bias∗1
Protective transistor bias
Horizontal register transfer clock
Horizontal register transfer clock

– 3 –
ICX274AL
Absolute Maximum Ratings
∗2+24V (Max.) is guaranteed when clock width < 10µs, clock duty factor < 0.1%.
+16V (Max.) is guaranteed during power-on or power-off.
Item
VDD, VOUT, φRG – φSUB
Vφ2α, Vφ3α– φSUB (α= A to C)
Vφ1, Vφ4, VL– φSUB
Hφ1β, Hφ2β, GND – φSUB (β= A, B)
CSUB – φSUB
VDD, VOUT, φRG, CSUB – GND
Vφ1, Vφ2α, Vφ3α, Vφ4– GND(α= A to C)
Hφ1β, Hφ2β– GND (β= A, B)
Vφ2α, Vφ3α– VL (α= A to C)
Vφ1, Vφ4, Hφ1β, Hφ2β, GND – VL (β= A, B)
Voltage difference between vertical clock input pins
Hφ1β– Hφ2β(β= A, B)
Hφ1β, Hφ2β– Vφ4 (β= A, B)
Against φSUB
Against GND
Against VL
Between input
clock pins
Storage temperature
Guaranteed temperature of performance
Operating temperature
–40 to +12
–50 to +15
–50 to +0.3
–40 to +0.3
–25 to
–0.3 to +22
–10 to +18
–10 to +6.5
–0.3 to +28
–0.3 to +15
to +15
–6.5 to +6.5
–10 to +16
–30 to +80
–10 to +60
–10 to +75
V
V
V
V
V
V
V
V
V
V
V
V
V
°C
°C
°C
∗2
Ratings Unit Remarks

– 4 –
ICX274AL
Bias Conditions
∗1Progressive scan mode, 2/8-line readout mode, 2/4-line readout mode, center scan modes (1) and (3),
and AF modes (1) and (2)
∗22-line addition mode and center scan mode (2)
∗3VLsetting is the VVL voltage of the vertical clock waveform, or the same voltage as the VLpower supply
for the V driver should be used.
∗4Substrate voltage (VSUB2) setting value indication
The substrate voltage (VSUB) for modes without line addition is generated internally.
The substrate voltage setting value for use with vertical 2-line addition is indicated by a code on the
bottom surface of the image sensor. Adjust the substrate voltage to the indicated voltage.
VSUB2 code – 1-digit indication ↑
VSUB2 code
The code and the actual value correspond as follows.
[Example] "h" indicates a VSUB2 setting of 11.6V.
∗5Do not apply a DC bias to the reset gate clock pin, because a DC bias is generated within the CCD.
DC characteristics
Supply current Item IDD
Symbol 10.0 Min. Unit RemarksTyp. Max. mA13.07.0
J
11.8 K 12.0 L 12.2 m 12.4 N 12.6 P 12.8 R 13.0 S 13.2 U 13.4 V 13.6 W 13.8 X 14.0 Y 14.2 Z 14.4
VSUB2 code
Actual value
1
8.8 2 9.0 3 9.2 4 9.4 6 9.6 7 9.8 8 10.0 9 10.2 A 10.4 C 10.6 d 10.8 E 11.0 f 11.2 G 11.4 h 11.6
VSUB2 code
Actual value
Supply voltage
Protective transistor bias
Substrate voltage
adjustment range
Substrate voltage adjustment accuracy
Reset gate clock
Item VDD
VL
VSUB
VSUB2
∆VSUB
φRG
Symbol 15.0
∗3
Internally generated value
Indicated
voltage
∗5
Min. V
V
V
V
Unit
∗4
RemarksTyp. Max.
No line addition∗1
2-line addition∗2
14.55
8.8
Indicated
voltage – 0.2
15.45
14.4
Indicated
voltage + 0.2

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ICX274AL
Clock Voltage Conditions
Readout clock
voltage
Vertical transfer
clock voltage
Horizontal transfer
clock voltage
Reset gate clock
voltage
Substrate clock
voltage
Item
VVT
VVH1, VVH2
VVH3, VVH4
VVL1, VVL2,
VVL3, VVL4
VφV
VVH3 – VVH
VVH4 – VVH
VVHH
VVHL
VVLH
VVLL
VφH
VHL
VCR
VφRG
VRGLH – VRGLL
VRGL – VRGLm
VφSUB
Symbol
14.55
–0.05
–0.2
–8.0
6.8
–0.25
–0.25
4.75
–0.05
0.8
3.0
21.5
Min.
15.0
0
0
–7.5
7.5
5.0
0
2.5
3.3
22.5
Typ.
15.45
0.05
0.05
–7.0
8.05
0.1
0.1
0.5
0.5
0.5
0.5
5.25
0.05
5.25
0.4
0.5
23.5
Max. Unit
1
2
2
2
2
2
2
2
2
2
2
3
3
3
4
4
4
5
Waveform
diagram
VVH = (VVH1 + VVH2)/2
VVL = (VVL3 + VVL4)/2
VφV= VVHn – VVLn (n = 1 to 4)
High-level coupling
High-level coupling
Low-level coupling
Low-level coupling
Cross-point voltage
Low-level coupling
Low-level coupling
Remarks
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V

– 6 –
ICX274AL
Clock Equivalent Circuit Constants
Note 1) Expressions using parentheses such as CφV2 (A,B), 3C indicate items which include all combinations of
the pins within the parentheses.
For example, CφV2 (A, B), 3C indicates [CφV2A3C, CφV2B3C].
CφV1
CφV2A, CφV2B
CφV2C
CφV3A, CφV3B
CφV3C
CφV4
CφV12 (A, B)
CφV12C
CφV13 (A, B)
CφV13C
CφV14
CφV2 (A, B), 3 (A, B)
CφV2 (A, B), 3C
CφV2 (A, B), 4
CφV2C, 3 (A, B)
CφV2C, 3C
CφV2C, 4
CφV3 (A, B), 4
CφV3C, 4
CφH1
CφH2
CφHH
CφRG
CφSUB
R1, R4
R2 (A, B, C), 3 (A, B, C)
RGND
RφH
RφH2
RφRG
Symbol
Capacitance between vertical transfer clock and
GND
Capacitance between vertical transfer clocks
Capacitance between horizontal transfer clock
and GND
Capacitance between horizontal transfer clocks
Capacitance between reset gate clock and GND
Capacitance between substrate clock and GND
Vertical transfer clock series resistor
Vertical transfer clock ground resistor
Horizontal transfer clock series resistor
Horizontal transfer clock ground resistor
Reset gate clock and series resistor
Item Min. 3300
1200
2700
1000
1800
6800
120
220
150
270
2700
470
680
680
1000
820
1800
820
1500
100
100
47
2
820
30
62
15
7
20
4.7
Typ. Max. pF
pF
pF
pF
pF
pF
pF
pF
pF
pF
pF
pF
pF
pF
pF
pF
pF
pF
pF
pF
pF
pF
pF
pF
Ω
Ω
Ω
Ω
kΩ
Ω
Unit Remarks

– 7 –
ICX274AL
Horizontal transfer clock equivalent circuit
Reset gate clock equivalent circuitVertical transfer clock equivalent circuit
Note 2) Cφ2α2βand Cφ3α3β(α= A to C, β= A to C other than α) are
sufficiently small relative to other capacitance between
other vertical clocks in the equivalent circuit, so these
are omitted from the equivalent circuit diagram.
Vφ4
Vφ1
Vφ2α(α= A to C)
Vφ3α(α= A to C)
CφV2α4 (α= A to C)
RGND
CφV1
CφV3α(α= A to C)
CφV4 CφV2α(α= A to C)
CφV2α3α(α= A to C)
CφV3α4 (α= A to C)
CφV12α(α= A to C)
CφV13α(α= A to C)
CφV14
R4
R3α(α= A to C)
R1
R2α(α= A to C)
Hφ 1B Hφ 2B
Cφ H1
Cφ H2
Cφ HH
Rφ H
Rφ H2
Rφ H
Hφ 1A Hφ 2A
Rφ H Rφ H
RGφRφ
RG
Cφ RG

– 8 –
ICX274AL
Drive ClockWaveform Conditions
(1) Readout clock waveform
VVH = (VVH1 + VVH2)/2
VVL = (VVL3 + VVL4)/2
VφV= VVHn – VVLn (n = 1 to 4)
(2) Vertical transfer clock waveform
100%
90%
10%
0% tr tf 0V
twh
φM
2
φM
V VT
V VH1
V VHH
V VHL
V VH
V VLH
V VL1
V VLL
V VHL
V VHH
V VL
V VH2
V VHH
V VHH
V VHL
V VHL
V VH
V VLH
V VL2
V VLL
V VL
V VHH
V VH
V VLH
V VLL
V VL
V VHL
V VL3
V VHL
V VH3
V VHH
V VH
V VL
V VHL
V VLH
V VLL
V VHL
V VH4
V VHH
V VHH
V VL4
Vφ1Vφ3A, Vφ3B, Vφ3C
Vφ2A, Vφ2B, Vφ2C Vφ4

– 9 –
ICX274AL
VHL
VCR
twl
two
twh
VφH
VφH
2
tr
Hφ2β
90%
10%
Hφ1β
tf
RG waveform
V
RGLH
V RGH
V RGL
V RGLL
V RGLm
tr twh
twl
tf
Vφ RG
Point A
VSUB
(Internally generated bias)
100%
90%
10%
0% tr tftwh
φM
2
φM
VφSUB
(3) Horizontal transfer clock waveform
Cross-point voltage for the Hφ1βrising side of the horizontal transfer clocks Hφ1βand Hφ2βwaveforms is VCR.
The overlap period for twh and twl of horizontal transfer clocks Hφ1βand Hφ2βis two. (β= A, B)
(4) Reset gate clock waveform
VRGLH is the maximum value and VRGLL is the minimum value of the coupling waveform during the period from
Point A in the above diagram until the rising edge of RG.
In addition, VRGL is the average value of VRGLH and VRGLL.
VRGL = (VRGLH + VRGLL)/2
Assuming VRGH is the minimum value during the interval twh, then:
VφRG = VRGH – VRGL
Negative overshoot level during the falling edge of RG is VRGLm.
(5) Substrate clock waveform

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ICX274AL
∗1When two vertical transfer clock drivers CXD3400N are used.
∗2tf ≥tr – 2ns, and the cross-point voltage (VCR) for the Hφ1β(β= A, B) rising side of the Hφ1βand Hφ2β
waveforms must be VφH/2 [V] or more.
Clock Switching Characteristics (Horizontal drive frequency: 28.6364MHz)
Min. twh Typ. Max.Min. Typ. Max.Min. Typ. Max.Min. Typ.Max.
twl tr tf
3.3
10
10
4
3.5
12.5
12.5
7
2.1
10
10
12.5
12.5
24
0.5
5
5
2
7.5
7.5
0.5
15
0.5
5
5
3
400
7.5
7.5
0.5
Unit
µs
ns
ns
ns
µs
Remarks
During
readout
∗1
∗2
When draining
charge
Item
Readout clock
Vertical transfer
clock
Horizontal
transfer clock
Reset gate clock
Substrate clock
Symbol
VT
Vφ1, Vφ4,
Vφ2α, Vφ3α
(α= A to C)
Hφ1β(β= A, B)
Hφ2β(β= A, B)
φRG
φSUB
Min.
two
Typ. Max.
810
Unit
ns
RemarksItem
Horizontal
transfer clock
Symbol
Hφ1A, Hφ1B,
Hφ2A, Hφ2B
Clock Switching Characteristics (Horizontal drive frequency: 36MHz)
Min. twh Typ. Max.Min. Typ. Max.Min. Typ. Max.Min. Typ.Max.
twl tr tf
4.0
8
8
4
4.2
9
9
5.5
1.67
8
8
9
9
8
0.5
5
5
2
6
6
0.25
15
0.5
5
5
3
400
6
6
0.25
Unit
µs
ns
ns
ns
µs
Remarks
During
readout
∗1
∗2
When draining
charge
Item
Readout clock
Vertical transfer
clock
Horizontal
transfer clock
Reset gate clock
Substrate clock
Symbol
VT
Vφ1, Vφ4,
Vφ2α, Vφ3α
(α= A to C)
Hφ1β(β= A, B)
Hφ2β(β= A, B)
φRG
φSUB
Min.
two
Typ. Max.
89
Unit
ns
RemarksItem
Horizontal
transfer clock
Symbol
Hφ1A, Hφ1B,
Hφ2A, Hφ2B

– 11 –
ICX274AL
Spectral Sensitivity Characteristics (excludes lens characteristics and light source characteristics)
Wave Length [nm]
Relative Response
400 500 600 700 800 900 1000
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
∗1Vsat2 is the saturation signal level in 2-line addition mode, and is 200mV per pixel.
∗2Progressive scan mode, 2/8-line readout mode, 2/4-line readout mode, and center scan modes (1) and (3).
∗32-line addition mode and center scan mode (2).
∗4Same for 2-line addition mode and center scan modes (2) and (3).
∗5Same for center scan mode (1).
∗6Same for AF modes (1) and (2).
∗7Excludes vertical dark signal shading caused by vertical register high-speed transfer.
Image Sensor Characteristics (Ta = 25°C)
Item
Sensitivity
Saturation signal
Smear
Video signal shading
Dark signal
Dark signal shading
Lag
Symbol
S
Vsat
Vsat2∗1
Sm
SH
Vdt
∆Vdt
Lag
Min.
335
400
400
Typ.
420
–100
–94
–88
Max.
545
–92
–86
–80
20
25
8
2
0.5
Unit
mV
mV
dB
%
mV
mV
%
Measurement
method
1
2
3
4
5
6
7
Remarks
1/30s accumulation
Ta = 60°C
Progressive scan mode∗4
2/4-line readout mode∗5
2/8-line readout mode∗6
Zone 0 and I
Zone 0 to II’
Ta = 60°C, 14.985 frame/s
Ta = 60°C, 14.985 frame/s, ∗7
No line addition∗2
2-line addition∗3

– 12 –
ICX274AL
4
V
10
4
8
8
Ignored region
Effective pixel region
Zone 0, I
Zone II, II’
V
10
H
8H 8
1628 (H)
1236 (V)
Zone Definition of Video Signal Shading
Measurement System
Note) Adjust the AMP gain so that the gain between [∗A] and [∗B] equals 1.
CCD C.D.S S/H AMP
CCD signal output [∗A]
Signal output [∗B]

– 13 –
ICX274AL
Note) Blacked out portions in the diagram indicate pixels which are not read out.
Output starts from line 1 in 2/8-line decimation mode.
1. Progressive scan mode
In this mode, all pixel signals are output in non-interlace format in 1/14.985s.
All pixel signals within the same exposure period are read out simultaneously, making this mode suitable
for high resolution image capturing.
2. 2/8-line readout mode
All effective area signals are output in approximately 1/30s by reading out the signals for only two out of
eight lines (1st and 6th lines, 9th and 14th lines).
This readout mode emphasizes processing speed over vertical resolution, making it suitable for AE/AF and
other control and for checking images on LCD viewfinders.
3. 2/4-line readout mode
All effective area signals are output in approximately 1/20s by reading out the signals for only two out of
four lines (3rd and 4th lines, 7th and 8th lines, and so on).
Readout modes
The diagrams below and on the following pages show the output methods for the following nine readout
modes.
2/4-line readout modeProgressive scan mode 2/8-line readout mode
16 (V2C/V3C)
15 (V2C/V3C)
14 (V2A/V3A)
13 (V2B/V3B)
12 (V2C/V3C)
11 (V2C/V3C)
10 (V2B/V3B)
9 (V2A/V3A)
8 (V2C/V3C)
7 (V2C/V3C)
6 (V2A/V3A)
5 (V2B/V3B)
4 (V2C/V3C)
3 (V2C/V3C)
2 (V2B/V3B)
1 (V2A/V3A)
V
OUT
16 (V2C/V3C)
15 (V2C/V3C)
14 (V2A/V3A)
13 (V2B/V3B)
12 (V2C/V3C)
11 (V2C/V3C)
10 (V2B/V3B)
9 (V2A/V3A)
8 (V2C/V3C)
7 (V2C/V3C)
6 (V2A/V3A)
5 (V2B/V3B)
4 (V2C/V3C)
3 (V2C/V3C)
2 (V2B/V3B)
1 (V2A/V3A)
V
OUT
16 (V2C/V3C)
15 (V2C/V3C)
14 (V2A/V3A)
13 (V2B/V3B)
12 (V2C/V3C)
11 (V2C/V3C)
10 (V2B/V3B)
9 (V2A/V3A)
8 (V2C/V3C)
7 (V2C/V3C)
6 (V2A/V3A)
5 (V2B/V3B)
4 (V2C/V3C)
3 (V2C/V3C)
2 (V2B/V3B)
1 (V2A/V3A)
V
OUT

– 14 –
ICX274AL
Note) Blacked out portions in the diagram indicate pixels which are not read out.
After reading out the pixels indicated by and transferring two lines, the pixels indicated by
are read out and two pixels of the same color are added by the vertical transfer block.
4. 2-line addition mode
In this mode, the signals for only two out of four lines (3rd and 4th lines, 7th and 8th lines, and so on) are
read out, the vertical register is shifted by 2 bits, and then the signals of the remaining two out of the four
lines (1st and 2nd lines, 5th and 6th lines, and so on) are read out and added within the vertical register.All
effective area signals are output in approximately 1/20s.
5. Center scan mode (1)
In this mode, the signals for only two out of four lines (3rd and 4th lines, 7th and 8th lines, and so on) are
read out. The undesired portions are swept by vertical register high-speed transfer, and the vertical
1136-pixel region in the center of the picture is output by the above readout method. The number of
output lines is 568 lines at 36MHz, and 434 lines at 28.6364MHz. The frame rate is increased
(approximately 30 frames/s) by setting the number of output lines to that of VGA mode, making this
mode suitable for VGA moving pictures. (However, the angle of view decreases.)
6. Center scan mode (2)
In this mode, the signals for only two out of four lines (3rd and 4th lines, 7th and 8th lines, and so on) are
read out, the vertical register is shifted by 2 bits, and then the signals of the remaining two out of the four
lines (1st and 2nd lines, 5th and 6th lines, and so on) are read out and added within the vertical register.
The undesired portions are swept by vertical register high-speed transfer, and the vertical 1136-pixel region
in the center of the picture is output by the above readout method.The number of output lines is 568 lines
at 36MHz, and 434 lines at 28.6364MHz. The frame rate is increased (approximately 30 frames/s) by
setting the number of output lines to that of VGA mode, making this mode suitable forVGA moving pictures.
(However, the angle of view decreases.)
Center scan mode (2)2-line addition mode Center scan mode (1)
16 (V2C/V3C)
15 (V2C/V3C)
14 (V2A/V3A)
13 (V2B/V3B)
12 (V2C/V3C)
11 (V2C/V3C)
10 (V2B/V3B)
9 (V2A/V3A)
8 (V2C/V3C)
7 (V2C/V3C)
6 (V2A/V3A)
5 (V2B/V3B)
4 (V2C/V3C)
3 (V2C/V3C)
2 (V2B/V3B)
1 (V2A/V3A)
V
OUT
16 (V2C/V3C)
15 (V2C/V3C)
14 (V2A/V3A)
13 (V2B/V3B)
12 (V2C/V3C)
11 (V2C/V3C)
10 (V2B/V3B)
9 (V2A/V3A)
8 (V2C/V3C)
7 (V2C/V3C)
6 (V2A/V3A)
5 (V2B/V3B)
4 (V2C/V3C)
3 (V2C/V3C)
2 (V2B/V3B)
1 (V2A/V3A)
V
OUT
16 (V2C/V3C)
15 (V2C/V3C)
14 (V2A/V3A)
13 (V2B/V3B)
12 (V2C/V3C)
11 (V2C/V3C)
10 (V2B/V3B)
9 (V2A/V3A)
8 (V2C/V3C)
7 (V2C/V3C)
6 (V2A/V3A)
5 (V2B/V3B)
4 (V2C/V3C)
3 (V2C/V3C)
2 (V2B/V3B)
1 (V2A/V3A)
V
OUT

– 15 –
ICX274AL
Note) Blacked out portions in the diagram indicate pixels which are not read out.
7. Center scan mode (3)
This is the center scan mode using the progressive scan method.
The undesired portions are swept by vertical register high-speed transfer, and the picture center is cut out.
The number of output lines is 580 lines at 36MHz, and 444 lines at 28.6364MHz.
8. AF mode (1)
In this mode, the undesired portions are swept by vertical register high-speed transfer, and the vertical
940-pixel region in the center of the picture is output in approximately 1/60s by reading out the signals for
only two out of eight lines (1st and 6th lines, 9th and 14th lines).The number of output lines is 235 lines at
36MHz, and 170 lines at 28.6364MHz. This mode aims for even faster AF control than 2/8-line readout
mode.
9. AF mode (2)
In this mode, the undesired portions are swept by vertical register high-speed transfer, and the vertical
300-pixel region in the center of the picture is output in approximately 1/120s by reading out the signals for
only two out of eight lines (1st and 6th lines, 9th and 14th lines).The number of output lines is 75 lines at
36MHz, and 43 lines at 28.6364MHz. This mode aims for even faster AF control than 2/8-line readout
mode.
AF mode (2)Center scan mode (3) AF mode (1)
16 (V2C/V3C)
15 (V2C/V3C)
14 (V2A/V3A)
13 (V2B/V3B)
12 (V2C/V3C)
11 (V2C/V3C)
10 (V2B/V3B)
9 (V2A/V3A)
8 (V2C/V3C)
7 (V2C/V3C)
6 (V2A/V3A)
5 (V2B/V3B)
4 (V2C/V3C)
3 (V2C/V3C)
2 (V2B/V3B)
1 (V2A/V3A)
V OUT
16 (V2C/V3C)
15 (V2C/V3C)
14 (V2A/V3A)
13 (V2B/V3B)
12 (V2C/V3C)
11 (V2C/V3C)
10 (V2B/V3B)
9 (V2A/V3A)
8 (V2C/V3C)
7 (V2C/V3C)
6 (V2A/V3A)
5 (V2B/V3B)
4 (V2C/V3C)
3 (V2C/V3C)
2 (V2B/V3B)
1 (V2A/V3A)
V OUT
16 (V2C/V3C)
15 (V2C/V3C)
14 (V2A/V3A)
13 (V2B/V3B)
12 (V2C/V3C)
11 (V2C/V3C)
10 (V2B/V3B)
9 (V2A/V3A)
8 (V2C/V3C)
7 (V2C/V3C)
6 (V2A/V3A)
5 (V2B/V3B)
4 (V2C/V3C)
3 (V2C/V3C)
2 (V2B/V3B)
1 (V2A/V3A)
V
OUT

– 16 –
ICX274AL
Center scan and AF modes
Description of Center Scan and AF Mode Operation
The center scan and AF modes realize high frame rates by sweeping the top and bottom of the picture with
high-speed transfer and cutting out the center of the picture.
The various readout modes during center scan and AF operation are described below.
•AF modes
AF mode (1), (2): The output method is the same as readout in 2/8-line readout mode.
•Center scan modes
Center scan mode (1): The output method is the same as 2/4-line readout mode.
Center scan mode (2): The output method consists of 2-line addition readout whereby the signals for only
two out of four lines (3rd and 4th lines, 7th and 8th lines, and so on) are read out,
the vertical register is shifted by 2 bits, and then the signals of the remaining two
out of the four lines (1st and 2nd lines, 5th and 6th lines, and so on) are read out
and added within the vertical register.
Center scan mode (3): The output method is the same as progressive scan mode.
The readout method, frame rate, number of output lines and other information for each readout mode are
shown in the table below.
Undesired portions (Swept by vertical register high-speed transfer)
Picture center cut-out portion
Mode Frame rate (frame/s)
Progressive scan mode
2/8-line readout mode
2/4-line readout mode
2-line addition mode
Center scan mode (1)
Center scan mode (2)
Center scan mode (3)
AF mode (1)
AF mode (2)
Progressive scan
2/8-line readout
2/4-line readout
2/4-line readout
2/4-line readout
2-line addition readout
Progressive scan
2/8-line readout
2/8-line readout
None
None
None
Vertical 2-line
None
Vertical 2-line
None
None
None
9.99
29.97
19.98
19.98
29.97
29.97
29.97
59.94
119.88
14.985
29.97
19.98
19.98
29.97
29.97
29.97
59.94
119.88
1220
305
610
1220
434
434
444
170
43
1220
305
610
1220
568
568
580
235
75
Number of output
effective pixel data
lines
Readout method Addition
method 28.6MHz 36MHz 28.6MHz 36MHz

– 17 –
ICX274AL
Measurement conditions
(1) In the following measurements, the device drive conditions are at the typical values of the bias and clock
voltage conditions, and the progressive scan readout mode is used.
(2) In the following measurements, spot blemishes are excluded and, unless otherwise specified, the optical
black level (OB) is used as the reference for the signal output, which is taken as the value measured at
point [*B] of the measurement system.
Definition of standard imaging conditions
(1) Standard imaging condition I:
Use a pattern box (luminance: 706cd/m2, color temperature of 3200K halogen source) as a subject.
(Pattern for evaluation is not applicable.) Use a testing standard lens with CM500S (t = 1.0mm) as an IR
cut filter and image at F8.The luminous intensity to the sensor receiving surface at this point is defined as
the standard sensitivity testing luminous intensity.
(2) Standard imaging condition II:
Image a light source (color temperature of 3200K) with a uniformity of brightness within 2% at all angles.
Use a testing standard lens with CM500S (t = 1.0mm) as an IR cut filter.The luminous intensity is adjusted
to the value indicated in each testing item by the lens diaphragm.
1. Sensitivity
Set to the standard imaging condition I. After selecting the electronic shutter mode with a shutter speed of
1/100s, measure the signal output (Vs) at the center of the screen, and substitute the values into the
following formulas.
S = Vs× [mV]
2. Saturation signal
Set to the standard imaging condition II. After adjusting the luminous intensity to 10 times the intensity with
the average value of the G chanel signal output, 150mV, measure the minimum values of the signal
outputs.
3. Smear
Set to standard imaging condition II.With the lens diaphragm at F5.6 to F8, adjust the luminous intensity
to 500 times the intensity with the average value of the signal output, 150mV. After the readout clock is
stopped and the charge drain is executed by the electronic shutter at the respective H blankings, measure
the maximum value (Vsm [mV]) of the signal outputs, and substitute the values into the following formula.
Smear in modes other than progressive scan mode is calculated from the storage time and signal
addition method. As a result, 2-line addition mode and center scan modes (2) and (3) are the same as
progressive scan mode, 2/4-line readout mode and center scan mode (1) are two times progressive scan
mode, and 2/8-line readout mode and AF modes (1) and (2) are four times progressive scan mode.
Sm = 20 ×log ××[dB] (1/10 V method conversion value)
100
30
Vsm
200 1 10
1
500

– 18 –
ICX274AL
4. Video signal shading
Set to the standard imaging condition II. With the lens diaphragm at F5.6 to F8, adjusting the luminous
intensity so that the average value of the signal output is 150mV.Then measure the maximum value (Vmax
[mV]) and minimum value (Vmin [mV]) of the G signal output and substitute the values into the following
formula.
SH = (Vmax – Vmin)/150 ×100 [%]
5. Dark signal
Measure the average value of the signal output (Vdt [mV]) with the device ambient temperature of 60°C
and the device in the light-obstructed state, using the horizontal idle transfer level as a reference.
6. Dark signal shading
After measuring 5, measure the maximum (Vdmax [mV]) and minimum (Vdmin [mV]) values of the dark
signal output and substitute the values into the following formula.
∆Vdt = Vdmax – Vdmin [mV]
7. Lag
Adjust the signal output generated by the strobe light to 150mV. After setting the strobe light so that it
strobes with the following timing, measure the residual signal amount (Vlag). Substitute the value into the
following formula.
Lag = (Vlag/150) ×100 [%]
VD
Light
Output
Strobe light timing
Vlag (lag)
Signal output 150mV

– 19 –
ICX274AL
Drive Circuit
3.3V
XV3
15V
XSG3C
XV2
XSG2C
XSUB
XV3
XSG3B XSG3A
XV2
XSG2B XSG2A
XV4 XV1
Hφ
1A
Hφ
2A
Hφ
1B
Hφ
2B
φRG
VSUB
CCD OUT
–7.5V
0.1
0.1
0.1
0.1
0.1
0.1
0.01
0.1
2200p
3.3/16V
3.3/20V
0.1
0.1
1/35V
100k
1M
4.7k
2SC4250
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
ICX274
(BOTTOM VIEW)
Vφ 4
Vφ 3A
Vφ 3B
Vφ 3C
Vφ 2A
Vφ 2B
Vφ 2C
Vφ 1
GND
V
OUT
Hφ 2A
Hφ 1A
V L
C SUB
φSUB
GND
Hφ
1B
Hφ 2B
φRG
V
DD
11 12 13 14 15 16 17 18 19 20
10
9 8 7 6 5 4 3 2 1
CXD3400N
11 12 13 14 15 16 17 18 19 20
10
9 8 7 6 5 4 3 2 1
CXD3400N
DCIN GND V
SUB2
V
SUB
2-line addition mode Center scan mode (2)
Substrate bias adjustment input voltage (VSUB in the circuit diagram above) Substrate bias φSUB pin voltage Modes other than the above
(Internally generated value)
Note) Substrate bias control
Switch the substrate bias adjustment input voltage to DCIN before adjusting the substrate bias in 2-line addition mode and center scan mode (2).

– 20 –
ICX274AL
Drive Timing Chart (Vertical Sync) Progressive Scan Mode
Note) The 1252H horizontal period at 36MHz is 480clk; the 1493H horizontal period at 28MHz is 1860clk.
HD
V1
VD
V2 V4 V3
1249
1250
1251
1252
1492
"a" "a"
1493
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1249
1250
1251
1252
1492
1493
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1235
1236
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
1236
1235
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
1236
36MHz
28.6MHz
28.6MHz
36MHz
CCD OUT