Preliminary PI3041A datasheet

Output voltage non-uniformity

25

%

LED bar non-uniformity,

see note 4.

Dark output voltage

<180

mV

Dark output non-uniformity

<60

mV

Adjacent Pixel non-uniformity

<20

%

LED Bar Input Voltage

5.0

V

LED Power Varies greatly.

See note 8.

LED Bar Input Current

380

mA

LED Power Varies greatly.

See note 8.

Table 6. Electro-Optical Characteristic At High Frequency

Notes: (1)

Note 1 under Table 2, Electro-Optical Characteristic is valid definition, except

that the A6 modules has 13 sensors sequentially cascaded, hence, Tint =

(13X96)/Fclk is the minimum integration time.

(2)

Fclk is the module’s clock, CP, frequency and equal to the pixel rate. Also, the

clock duty cycle is set to 25% for the 2.0 MHz clock frequency and set to 50% for

the 5.0 MHz.

(2)

Vpavg = Vp(n)/Npixels (average level in one line scan).

Npixels is the total number of pixels in the module, i.e., 13 die x 96 pixels. The

amplitude of Vpavg is adjusted with RIN (which are installed in the production

module) on all of CIS modules because of variations caused by the LED light

sources. The low-cost production LED’s light power are known to vary as much

as ± 30%.

(4)

Up is the uniformity specification, measured under a uniform exposing light

exposure. Up = [Vp(max) - Vpavg] / Vpavg x 100% or [Vpavg - Vp(min)] / Vpavg}

x 100%, whichever is greater.

Where

Vp(max) is the maximum pixel output voltage in the light.

Vp(min) is the minimum pixel output voltage in the light.

In applying the Up definition, Npixels must change. It must include 13 sensors,

or 13x96 pixels.

Additionally, because the low-cost LED power variation can be high as ± 30%,

the non-uniformities may varies as much as ± 30%. Hence the uniformities are

worst because of the LED Bar CIS modules.

(5)

of the sensor. Dark is where light is off, leaving the image surface unexposed.

(6)

Ud = Vdmax – Vdmin.

(7)

Upadj = MAX[ | (Vp(n) - Vp(n+l) | / Vp(n)) x 100%. Upadj is the nonuniformity in

percentage. It is the amplitude difference between two neighboring pixels.

Page 13 of 18 Date: 09/23/05

(8)

The low-cost LED light powers are widely specified, worst case as high as ± 30%,

hense, the requirement for the Vpavg Gain Control and the wide Up specifications.