AMIS-720658 Datasheet, PDF (6/15 Pages) AMI SEMICONDUCTOR – Contact Image Sensor

AMIS-720658: Contact Image Sensor
Data Sheet
5.0 Device Specifications
Table 2 lists the device specifications of the AMIS-720658 sensor operating under the typical values of the recommended operating
conditions in table 3; pixel rate of 3.0MHz, temperature of 25^°C, Vdd = 3.3V, VREF = 1.2V, integration time of 1.0ms for 300dpi and
2.0ms for 600dpi, no resistive load on Vout and with a capacitive load of 50pf on Vout to ground. The average output voltage Vpavg,
which is defined as the voltage difference between the average pixel level in the light and the average pixel level in the dark, will be
adjusted to approximately 0.7V, unless stated otherwise. A linear array of uniform green LED’s will be used as the light source for
measurements requiring illumination, unless otherwise stated.
Table 2: Device Specifications
Parameter
Number of pixels ⁽¹⁾
Symbol
Min.
Typ.
Max.
Units
@ 600dpi
344
344
@ 300dpi
Pixel-to-pixel spacing ⁽¹⁾
172
172
@ 600dpi
42.3
42.3
µm
@ 300dpi
84.6
84.6
µm
Pixel vertical height
Dark output voltage level ⁽²⁾
Dark output non-uniformity ⁽³⁾
Photo-response non-uniformity ⁽⁴⁾
Adjacent photo-response non-uniformity ⁽⁵⁾
25
25
µm
Vd
1.2
V
Ud
100
mV
Up
±15
%
Upn
±15
%
Sensor-to-sensor photo-response
Non-uniformity ⁽⁶⁾
Saturation voltage ⁽⁷⁾
Sensitivity ⁽⁸⁾
@ 600dpi
@ 300dpi
Photo response linearity ⁽⁹⁾
Individual pixel noise (rms) ⁽¹⁰⁾ @ 600dpi
Usensor
VSat
Sv
PRL
P_noise
±10
0.95
750
1500
−2.5
+2.5
3.0
10
%
V
V / uJ / cm²
V / uJ / cm²
%
mV
Image lag (chip average)
2
%
Power supply current
IDD per chip
60
80
mA
Wafer thickness
325
350
375
µm
Notes
1. The SR input is connected to high (Vdd) or to low (ground) to set the sensor to operate in the 600dpi or 300dpi mode, respectively. In the 600dpi mode, all 344 pixels are
clocked out, whereas in the 300dpi mode, Pixels 1 and 2 are combined, 3 and 4 are combined and so on up to Pixels 343 and 344 being combined. One half of the pixel
amplifiers and one half of the scanning register are then disabled. As a result, sensitivity in the 300dpi mode will be twice that of the 600dpi mode. The 300dpi readout
time will be approximately half of the 600dpi readout time.
2. Dark output voltage (Vd). Vd is the average dark output level and is essentially the offset level of the video output in the dark. The dark level is set by the voltage on
VREF and which must be applied externally, to a voltage of 1.2V for optimal module operation.
3. Dark output non-uniformity (Ud). Ud = Vdmax – Vdmin, where Vdmax is the maximum pixel output voltage in the dark and Vdmin is the minimum pixel output voltage in
the dark.
4. Photo-response non-uniformity (Up). Up = ((Vpmax-Vpavg)/Vpavg) x 100% or ((Vpavg-Vpmin)/Vpavg) x 100%, whichever is the greater, where Vpmax is the maximum
pixel output voltage in the light, Vpmin is the minimum pixel output voltage in the light and Vpavg is the average output voltage of all pixels in the light.
5. Adjacent photo-response non-uniformity (Upn). Upn = [Max(Vpn, Vpn+1) - Min(Vpn, Vpn+1)) / Min(Vpn, Vpn+1)) x 100%, where Vpn is the pixel output voltage of pixel n
in the light and Vpn+1 is the pixel output voltage of pixel n+1.
6. Sensor-to-sensor photo-response non-uniformity (Usensor). Usensor = (Vpavg – Wavg) / Wavg, where Wavg is the average output of all sensors on the same wafer that
pass all other specifications.
7. Saturation voltage (Vsat) is defined as the maximum video output voltage swing measured from the dark level to the saturation level. It is measured by using the module
LED light source with the module imaging a uniform white target. The LED light level is increased until the output voltage no longer increases with an increase in the
LED brightness. The dark level is set by the voltage on VREF and which must be applied externally, to a voltage of 1.2V for optimal module operation.
8. Sensitivity (Sv) is defined as the slope of the Vpavg vs. Exposure curve.
9. Photo-response linearity (PRL). PRL = ((Vratio – Tratio) / Tratio) x 100% where Vratio = (Vavg2 – Vavg1) / (Vavg3 – Vavg1), Tratio = (Tint2 – Tint1) / (Tint3 – Tint1),
Vavg1 is the average output voltage of all pixels under fixed illumination with an integration time of Tint1 selected so that Vavg1 is around 0.1 V, Vavg2 is the average
output voltage of all pixels under the same fixed illumination with an integration time of Tint2 selected so that Vavg2 is around 0.4 V, Vavg3 is the average output voltage
of all pixels under the same fixed illumination with an integration time of Tint3 selected so that Vavg3 is around 0.7 V.
10. Individual pixel noise in rms (P_noise). The individual pixel noise in rms is defined as the standard deviation of each pixel in the dark. This can also be though of as
output referred noise as it is measured at the sensor output.
AMI Semiconductor – Jul 06, M-20503-007
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