I M A G E S E N S O R
NMOS linear image sensor
S3901/S3904-F series
NMOS linear image sensors with fiber optic windows
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 sensitivity yet very low noise, delivering a high S/N even at low light levels.
S3901/S3904-F series are current-output type NMOS linear image sensors with fiber optic windows and feature superior output linearity and wide
dynamic range. The fiber optic windows allow efficient optical coupling to an image device such as image intensifiers suitable for low-light-level
detection.
The photodiodes of S3901-F series have a height of 2.5 mm and are arrayed in a row at a spacing of 50 µm. The photodiodes of S3904-F series
also have a height of 2.5 mm but are arrayed at a spacing of 25 µm. The photodiodes are available in 2 different pixel quantities for each series:
256 (S3901-256F), 512 (S3901-512F, S3904-512F), 1024 (S3904-1024F).
Hamamatsu also provides S3902/S3903-F series having a pixel height of 0.5 mm.
Features
Applications
Wide active area
Pixel pitch: 50 µm (S3901-F series)
Multichannel spectrophotometry
Image readout system
25 µm (S3904-F series)
Pixel height: 2.5 mm
Low dark current and high saturation charge allow a long
integration time and a wide dynamic range at room temperature
Excellent output linearity and sensitivity spatial uniformity
Lower power consumption: 1 mW Max.
Start pulse and clock pulses are CMOS logic compatible
ꢀꢀEquivalent circuit
ꢀꢀActive area structure
START st
DIGITAL SHIFT RESISTER
(MOS SHIFT RESISTER)
END OF SCAN
ACTIVE VIDEO
CLOCK
CLOCK
1
2
ACTIVE
PHOTODIODE
b
Vss
a
SATURATION
CONTROL GATE
SATURATION
DUMMY VIDEO
CONTROL DRAIN
DUMMY DIODE
FIBER OPTIC PLATE
OXIDATION SILICON
N TYPE SILICON
P TYPE SILICON
KMPDC0020EA
S3901-F SERIES: a=50 µm, b=45 µm
S3904-F SERIES: a=25 µm, b=20 µm
KMPDA0131EA
ꢀ Absolute maximum ratings
Parameter
Symbol
Vφ
Value
Unit
15
V
mW
°C
Input pulse (φ1, φ2, φst) voltage
Power consumption *
1
P
1
2
Operating temperature *
Topr
Tstg
-40 to +65
-40 to +85
Storage temperature
°C
*1: Vφ=5.0 V
*2: No condensation