IMAGE SENSOR
NMOS linear image sensor
S3901/S3904 series
Current output, high UV sensitivity, excellent linearity, low power consumption
NMOS linear image sensors are self-scanning photodiode arrays designed specifically as detectors for multichannel spectroscopy. The scanning
circuit is made up of N-channel MOS transistors, operates at low power consumption and is easy to handle. Each photodiode has a large active
area, high UV sensitivity yet very low noise, delivering a high S/N even at low light levels. NMOS linear image sensors also offer excellent output
linearity and wide dynamic range.
The photodiodes of S3901 series have a height of 2.5 mm and are arrayed in a row at a spacing of 50 µm. The photodiodes of S3904 series also
have a height of 2.5 mm but are arrayed at a spacing of 25 µm. The photodiodes are available in 3 different pixel quantities for each series: 128
(S3901-128Q), 256 (S3901-256Q, S3904-256Q), 512 (S3901-512Q, S3904-512Q) and 1024 (S3904-1024Q). Quartz glass is the standard window
material.
Features
Pixel pitch: 50 µm (S3901 series)
25 µm (S3904 series)
Pixel height: 2.5 mm
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High UV sensitivity with good stability
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Low dark current and high saturation charge allow a long
integration time and a wide dynamic range at room temperature
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Excellent output linearity and sensitivity spatial uniformity
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Lower power consumption: 1 mW max.
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Start pulse and clock pulses are CMOS logic compatible
Applications
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Wide active area
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Multichannel spectrophotometry
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Image readout system
s
Equivalent circuit
Start
Clock
Clock
st
1
2
Degital shift register
(MOS shift register)
End of scan
s
Active area structure
Active
photodiode
Active video
Vss
Saturation
control gate
Saturation
control drain
Dummy diode
1.0 µm
400 µm
b
a
1.0 µm
Dummy video
Oxidation silicon
KMPDC0020EA
N type silicon
P type silicon
S3901 series: a=50 µm, b=45 µm
S3904 series: a=25 µm, b=20 µm
KMPDA0059EA
s
Absolute maximum ratings
Parameter
Input pulse (φ1,
φ2, φst)
voltage
Power consumption*
1
Operating temperature*
2
Storage temperature
*1: Vφ=5.0 V
*2: No dew
Symbol
Vφ
P
Topr
Tstg
Value
15
1
-40 to +65
-40 to +85
Unit
V
mW
°C
°C
2.5 mm
1
HAMAMATSU [ HAMAMATSU CORPORATION ]
