EPC901 Datasheet, PDF (10/37 Pages) Espros Photonics corp – CCD line sensor 1024x1 pixel

3.7.1. Typical spectral range and quantum efficiency (QE)
The following diagrams show the quantum efficiency as a function of wavelength. The curve is a measurement where the chip has a wide-
range anti-reflection coating which is optimized at 650 nm.
100
90
80
70
60
50
40
30
20
10
0
300
400
500
600
700
800
900 1000 1100 1200
Wavelength [nm]
Figure 6: Quantum efficiency as a function of wavelength
3.8. Frequency response
The signal amplitude at the output of the video amplifier is a function of the optical modulation and the read-out clock frequency. The
optical modulation is defined as follows:
Test setup
Light source (parallel light)
0.128mm
0.128mm
Pixel 0
Grid
Light
Shadow
epc901
side view
Pixel 1023
Amplifier
output
Measurement output
0
Pixel no.
1023
The amplitude at the video amplifier output as a function of the Read Clock frequency is as follows (temperature sensor off, differential
mode):
Read Clock
frequency
Mode
BW (video am- VIDEO_
plifier band- GBW_SEL_
width setting)
REG
GAIN Min. useful
SNR typ.
SNR typ.
signal swing (charge pump off) (charge pump on)
min
typ
min
typ
Useful
pixel
range ¹
1MHz
Differential
LOW_BW
0x0
1
2.0Vpp
66dB 70dB 65dB 67dB 3..1020
10MHz
Differential
HIGH_BW
0x3
1
1.5Vpp
55dB 58dB 53dB 55dB 3..1020
54MHz
Differential
HIGH_BW
0x3
1
0.5Vpp
46dB 49dB 44dB 46dB 3..1020
54MHz
Differential
HIGH_BW
0x3
2
0.75Vpp
46dB 49dB 42dB 46dB 3..1020
54MHz
Differential
HIGH_BW
0x3
4
1.25Vpp
46dB 49dB 42dB 46dB 3..1020
1MHz Single-ended LOW_BW
0x0
1
1.6Vpp
67dB 70dB
N/A
N/A 3..1020
Table 2: Useful video amplifier signal swing and SNR for different settings
Note:
1 _{For the ROI_SEL=H, the read-out region as defined in Table 5 is the useful pixel range}
© 2016 ESPROS Photonics Corporation
Characteristics subject to change without notice
10 / 37
Datasheet_epc901-V5.6
www.espros.com