Parameter
PI228MC-A4
Symbol
High Power Yellow-Green LED
Value
Units
Note
Line scanning rate
Clock frequency
(2)
Bright output voltage
(3)
Bright output
nonuniformity
(4)
Dark nonuniformity
(5)
Dark output voltage
(6)
Modulation transfer
function
(7)
Tint
(1)
90
µsec
MHz
Volt
%
mV
mV
%
@ 5.0
MHz clock
frequency
Fclk
Video Output
Up
Ud
Dark Level (DL)
MTF
5.0
0.5
<+/-30
<40
<60
>40
Table 5C. PI228MC-A4 Electro-Optical Characteristics
See notes below Table 5D.
Parameter
PI229MC-A4
Symbol
Low Power Yellow-Green LED
Symbol
Units
Notes
Line scanning rate
Clock frequency
(2)
Bright output voltage
(3)
Bright output
nonuniformity
(4)
Dark nonuniformity
(5)
Dark output voltage
(6)
Modulation transfer
function
(7)
Tint
(1)
150
µsec
MHz
Volt
%
mV
mV
%
@ 3.0
MHz clock
frequency
Fclk
Video Output
Up
Ud
Dark Level (DL)
MTF
3.0
0.5
<+/-30
<40
<60
>40
Table 5D. PI229MC-A4 Electro-Optical Characteristics
Definition:
(1) Tint is the line scanning rate or integration time. Tint is determined by the interval between two
start pulses, SP.
(2) Fclk: main clock frequency also equals the video sampling frequency.
(3) Video output level is controlled with a voltage adjustment as well as the Integration time and
LED light power.
(4) Up = [Vp(max) - Vpavg]/Vpavgx100% or [Vpavg-Vp(min)]/Vpavg}x100%, whichever is greater
is selected.
Where Vp(max) = maximum pixel level and Vp(min) = minimum pixel level.
and Vpavg =
Vp
(
n
) / 5184
n
=
1
(5) Ud = Vdmax – Vdmin
Vdmin is the minimum output voltage with LED off.
Vdmax is maximum output voltage with LED on.
(6) This level is measured from the reset level that is located between the pixels, during the pixel
reset duration. The reset level is at or near ground, 0V. Note the gain is adjustable on each
output. However, it is recommended that the gain should not be increased above the level
where the reset ground level starts to increase above zero.
(7) A graph of the typical MTF vs DOF is shown under discussion of MTF in Figure 5.
PAGE 6 OF 10 - PI227/228/229, 01-31-04
∑
n
5184
AMI [ AMI SEMICONDUCTOR ]
