Designed for front-illuminated CCD area image sensors
C7020, C7021 and C7025 are high sensitivity multichannel detector heads for use with front-illuminated FFT-CCD area image sensors. C7020 is
designed for the non-cooled front-illuminated CCD image sensors (S7010 series), while C7021 and C7025 for the TE-cooled CCD image sensors
(S7011/S7015 series) for detection at even lower light levels. C7020, C7021 and C7025 incorporate a low-noise driver/amplifier circuit that
provide reliable operation from simple external signals. C7021 and C7025 also include a highly stable temperature controller that cools the sensor
to a preset temperature level (Ts= -10 ˚C) as soon as the power is turned on. If the cooler fails and causes internal circuitry to overheat, the builtin protection circuit automatically turns off the power to the thermoelectric cooler. Despite its compact size, the housing configuration is designed
for good heat dissipation, and threaded mounting holes on the front panel allow connections to other devices such as monochrometers.
The table below shows front-illuminated CCD image sensors for C7020, C7021 and C7025. C7020, C7021 and C7025 do not come with a CCD
image sensor, so select the desired sensor and order it separately.
Multichannel detector head controller C7310-02 is also available.
Features
l
Designed for front-illuminated CCD area image sensor *
C7020: for non-cooled type
C7021, C7025: for TE-cooled types
l
Binning operation *
l
Driver/amplifier circuit for low noise CCD operation
l
Highly stable temperature controller (C7021, C7025)
Cooling temperature: fixed at -10 ± 0.05 ˚C
(Ta=10 to 35 ˚C)
l
Simple signal input operation
l
Compact configuration
2
Applications
1
l
Fluorescence spectroscopy
l
Raman spectroscopy
l
Other low light level detection
■ Selection guide
The table below shows CCD area image sensors applicable for C7020, C7021, C7025.
Since C7020, C7021, C7025 do not include aCCD area image sensor, so select the desired sensor and order itseparately.
CCD area image sensor
Type No.
C7020
C7021
C7025
*1: The FFT-CCD (full frame transfer CCD) has charge transfer sections that are also used as light receiving areas, being
different from interline transfer CCD (IT-CCD) commonly used in video cameras. Compared to the IT-CCD, the FFT-CCD
offers advantages of low dark current, a 100 % open area ratio and low image lag.
*2: The FFT-CCD was originally designed as a two-dimensional image sensor. However, it can be operated like a linear image
sensor having a large active area by transferring all the pixel signals in the vertical direction to the horizontal register (this is
referred to as line binning).
*3: C7021, C7025
*4: Including the circuit gain.
*5: At MPP mode. Vertical register value. The actual value equals the sum of the vertical direction because of the binning
■ Specifications for temperature controller (C7021, C7025)
(Ta=25 °C, V
D1
=+5 V, V
Parameter *
Cooling temperatureTs-11-10-9°C
Temperature control range
Power dissipation of TE-cooler elementPp--7W
Cool down time to reset temperatureto--5min.
Setting temperature for overheat protectionTo-+45-°C
*7: Other functions include error display, automatic power off, and detection of electrical opens and shorts by the thermosensor.
A1+
=+15 V, V
7
A1-
= -15 V, VA2=+24 V, VD2=+5 V, Vp=+5 V, VF=+12 V)
SymbolMin.Typ.Max.Unit
DTs
-0.05-+0.05°C
■ Spectral response
50
40
30
20
10
QUANTUM EFFICIENCY (%)
0
400 500 600 700
800 900 1000 1100 1200
(Typ. Ta=25 ˚C)
WAVELENGTH (nm)
KMPDB0051EA
■ Block diagram (front-illuminated CCD area image sensor)
IG1V
24
IG2V ISV
SS
2023 22
P1V
■ Dark current vs. temperature
10000
1000
100
/pixel/s)
-
10
1
DARK CURRENT (e
0.1
0.01
-50-30-20 -10
-40
P2V
1514
TG
16
(Tentative Data)
0102030
TEMPERATURE (°C)
KMPDB0052EA
RG
1
RD
2
OS
3
45
OD OG
6
SG
4 OPTICAL
V
......
......
1H
......
2 ISOLATOIN2 ISOLATOIN
BLACK
2n SIGNAL OUT
9
4 OPTICAL
BLACK
V=60, 124, 252
H=512, 1024
P1HP2H
4 BLANK4 BLANK
1110
IG2H
13
12
ISH
IG1H
KMPDC0015EA
3
Page 4
CCD multichannel detector head
■ Block diagram of C7021, C7025
P+
TE-COOLER
CCD AREA IMAGE SENSOR
S7011/S7015 SERIES
P-
TH+
TH-
OD
RD
OG
IG1H, IG2H
IG1V, IG2V
P1V, P2V, TG
P1H, P2H
SG
RG
SS, ISV, ISH
OS
REGULATOR
VDD
DRIVER
TEMPERATURE CONTROLLER *
TH.H
VEE
PRE-AMP
INVERTER
C7020, C7021, C7025
Vp (+5V)
P. GND
D2 (+5V)
V
D. GND
LED
VF (+12V)
F. GND
Temp Monitor
Cooling Control
V
D1 (+5V)
D. GND
A1+ (+15V)
V
VA1- (-15V)
A. GND
A2 (+24V)
V
Start
TIMING
GENERATOR
CLK
EOS
Trigger
Mode Select
BUFFER
Data Video
LOW-PASS
CLAMP
FILTER
* C7020 does not include the temperature controller and TE-cooler.
10A. GNDAnalog ground
11VA2 (+24 V)Analog power supply
12D. GNDDigital ground
13D. GNDDigital ground
14D. GNDDigital ground
15TriggerDigital output signal for A/D conversion. HCMOS compatible. Positive logic.
■ Pin assignment of "TE CONTROL I/O" connector (C7021, C7025)
9-pin D-sub connector
2345
1
9
8
67
KACCC0075EA
Pin No.Terminal nameDescription
1V
2Temp monitorAnalog output signal of the temperature of the CCD image sensor
3Cooling control
4Vp (+5 V)
5V
6D. GNDGround
7D. GNDGround
8P. GND
9F. GNDPower supply return for cooling fan
Available for using same power supply (+5 V) for "+VD2" and "+Vp".
Caution: Do not connect "VD2
These may be connected (shorted) at the power supply end, not 9-pin D-sub connector.
(+5 V)Digital power supply
D2
Digital input signal for starting to cool down. HCMOS compatible.
High level or left open: cooling
Low level: stand-by
Power supply for the thermoelectric cooler in the CCD image sensor.
(Please use AWG 18 wire)
(+12 V)Power supply for cooling fan
F
Power supply return of the thermoelectric cooler mounted in the CCD image sensor.
(Please use AWG 18 wire)
" and "Vp" together on the backside of the 9-pin D-sub connector.