AMIS-720442-A: 400dpi Contact Image Sensor

Data Sheet

Table 4: Electro-Optical Characteristics at High Frequency

Red 660 LED Bar, A6 PCB in A6 Module Housing, at 5.0MHz Clock

Parameters

Symbols

Typical

Units

Remarks

Line scanning rate

Tint

(1)

334

µs/line

13 die in the scan, see Note 1 (bottom of Table 6)

Clock frequency

Fclk

(2)

5

MHz

Output voltage

Vpavg

(3)

0.5

V

Amplifier gain = 1.0, see Note 3

Output voltage non-uniformity

Up

(4)

± 20

%

LED bar non-unif

y, see Note 4

ormit

Dark output voltage

Vd

(5)

<180

mV

Dark output non-uniformity

Ud

(6)

<80

mV

Adjacent pixel non-uniformity

Upadj

(7)

<20

%

LED bar input voltage

VLED

(8)

5.0

V

LED power varies

y, see Note 8

greatl

LED bar Input current

ILED

(8)

90

mA

LED power varies

y, see Note 8

greatl

Table 5: Electro-Optical Characteristics at High Frequency

Y-G LED Bar, A6 PCB in A6 Module Housing, at 2.0MHz Clock

Parameters

Symbols

Typical

Units

Remarks

Line scanning rate

Tint

(1)

835

µs/line

13 die in the scan, see Note 1 (bottom of Table 6)

Clock frequency

Fclk

(2)

2

MHz

Output voltage

Vpavg

(3)

0.4

V

Amplifier gain = 1.0, see Note 3

Output voltage non-uniformity

Up

(4)

± 20

%

LED bar non-unif

y, see Note 4

ormit

Dark output voltage

Vd

(5)

<15

mV

Dark output non-uniformity

Ud

(6)

<15

mV

Adjacent pixel non-uniformity

Upadj

(7)

<20

%

LED bar input voltage

VLED

(8)

5.0

V

LED power varies

y, see Note 8

greatl

LED bar input current

ILED

(8)

380

mA

LED power varies

y, see Note 8

greatl

Table 6: Electro-Optical Characteristics at High Frequency

Y-G LED Bar, A6 PCB in A6 Module Housing, at 5.0MHz Clock

Parameters

Symbols

Typical

Units

Remarks

Line scanning rate

Tint

(1)

334

µs/line

13 die in the scan, see Note 1 (bottom of Table 6)

Clock frequency

Fclk

(2)

5

MHz

Output voltage

Vpavg

(3)

0.2

V

Amplifier gain = 1.0, see Note 3

Output voltage non-uniformity

Up

(4)

± 25

%

LED bar non-unif

y, see Note 4

ormit

Dark output voltage

Vd

(5)

<160

mV

Dark output non-uniformity

Ud

(6)

<60

mV

Adjacent pixel non-uniformity

Upadj

(7)

<20

%

LED bar input voltage

VLED

(8)

5.0

V

LED power varies

y, see Note 8

greatl

LED bar input current

ILED

(8)

380

mA

LED power varies

y, see Note 8

greatl

Notes:

(1)

Note 1 under

integration time

Table 2, is a valid d

cept that in the A6 modules

3 sensors sequ

k for the minimum

.

e production module) on all of CIS modules because of variations caused by the LED light sources.

(4)

sensors, or 13x128 pixels.

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

(5)

(6)

p

efinition, ex

has 1

entially cascaded, hence, Tint = (13X128)/Fcl

(2)

Fclk is the module’s clock, CP, frequency and is equal to the pixel rate. Also, the clock duty cycle is set to 25 percent for the 2.0MHz clock frequency and set to 50

percent for the 5.0MHz.

(3)

Vpavg =

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

Where

Vp(n) is the amplitude of n

amplitude of Vpavg is adjusted with RIN (which installed in th

The low-cost production LED’s light power are known to vary as much as ± 30%.

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 dark.

The pixel Vp(n) is one n

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

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

worst because of the LED bar CIS modules.

Vd =

Ud = Vdmax – Vdmin.

(7)

Upadj = MAX[ | (Vp(n) - Vp(n+l) | / Vp(n)) x 100%. Upadj is the non-uniformity in percentage. It is the amplitude difference between two neighboring pixels.

powers are widely specified, worst case as high as ± 30%, hence, the requirement for the Vpavg gain control and the wide U

(8)

The low-cost LED light

specifications.

11

AMI Semiconductor – May 06, M-20571-001

www.amis.com