EPC901 Datasheet, PDF (28/37 Pages) Espros Photonics corp – CCD line sensor 1024x1 pixel

11.2. Circuit for single ended mode
C_VDD
VDD
Factory
L
(do not
connect)
Configuration
32
C_VDD1V8
18
C_VDD5V0
20
C_VDD7V0
VDD1V8
VDD5V0
VDD7V0
epc901
CCD --> Frame Store Buffers --> CDS
Communication
μC / FPGA
11
Video
Amp
VDD
VDD_OA 10
C_{VDD_OA}
VIDEO_P 9
VIDEO_CM
VIDEO_N 8
ADC
R_BIAS
Figure 14: Single ended mode application diagram
In single-ended transmission mode, VIDEO_N and VIDEO_CM must be tied to ground. The output signal is available at VIDEO_P.
Illumination
VIDEO_P (typ.)
Dark voltage
0.4V
Maximum video output
2.0V
Table 29: Video amplifier output in single-ended mode
11.3. External components
The external components in Figure 13 and Figure 14 shall be as follows:
Param- Description
eter
Value Units Toler-
ance
RBIAS External resistor defining the bias current 56k kΩ
CVDD1V8 Decoupling capacitor for VDD1V8
1.0 μF
CVDD5V0 Decoupling capacitor for VDD5V0
2.2 μF
CVDD7V0 Decoupling capacitor for VDD7V0
2.2 μF
CVDD
Decoupling capacitor for VDD
1.0 μF
CVDD_OA Decoupling capacitor for VDD_OA
1.0 μF
L
Decoupling inductor
600 Ω
±1%
±20%
±20%
±20%
±20%
±20%
Comments
Resistance temperature coefficient max. ±100ppm/K
low ESR
low ESR
low ESR
low ESR
low ESR
e.g. Taiyo Yuden BK1005HR601-T
11.4. Low noise operation
11.4.1. Charge pump noise
The internal charge pump generates considerable noise, especially in single-ended mode. The noise performance can be optimized by
turning off the charge pump and supplying the chip with an external 5V supply. Refer to section 12.2..
11.4.2. Video amplifier noise
Another noise source is the video amplifier which can be used in two different modes. Single ended mode is the lower noise operation
mode. Thus, use the chip in single ended mode for low noise applications.
© 2016 ESPROS Photonics Corporation
Characteristics subject to change without notice
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Datasheet_epc901-V5.6
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