RANDOM NOISE
MODULATION TRANSFER
FUNCTION
RNL
(10)
MTF
(11)
<24
<4
45
p-p mV
rms mV
%
Notes:
(1) TINT is the line scan rate or integration time. TINT is determined by the time interval
between two start pulses (SP). See above Table 5.1, under Note 5.
(2) FREQ is the input clock frequency and its corresponding PRATE is the pixel sample rate.
(3) The RESPONSIVITY is the ratio of video signal in volts divided by the unit exposure
(Volts/micro-Joules/cm
2
). The VP level was adjusted to ~1.6V with the individual LED
currents as specified in table’s the note column with module lying flat down on white sheet
with OD between 0.05 to 0.09.
(4) Vpmax = maximum pixel value of Vp(n); Vpmin = minimum pixel value of Vp(n); Vpavg =
å
Vp(n)/2408; where Vp(n) is the n
th
pixel in a line scan with the module scanning a uniform
white target. Vp values are measured with a uniform exposure.
(5) BRIGHT OUTPUT NONUNIFORMITY: Up(+) = [(Vpmax - Vpavg) / Vpavg] x 100% or Up(-)=
[(Vpavg - Vpmin) / Vpavg] x 100%, whichever polarity with the highest absolute value is
selected.
(6) BRIGHT OUTPUT TOTAL NONUNIFORMITY: Uptotal = [Vpmax -Vpmin]/Vpavg
(7) ADJACENT PIXEL NONUNIFORMITY: Upadj = MAX[ | (Vp(n) - Vp(n+l) | / Vp(n)) x 100%.
Upadj is the nonuniformity in percentage. It is the maximum difference amplitude between
two neighboring pixels.
(8) DARK NONUNIFORMITY: Ud = Vdmax – Vdmin: Vdmax is the maximum pixel value of the
video pixel with the exposure off. Vdmin is the minimum pixel value of the video pixel with
exposure off. The references for these levels are the dark level, VDL.
(9) DARK OUTPUT VOLTAGE, VDL is the level between the output dark level and ground.
(10) RANDOM NOISE, RNL, its rms value was calculated from measured p-p thermal noise
taken at output from a selected pixel. The rms is defined as one standard deviation of at
least 64 pixels samples. The calculation of the standard deviation is based on idealized
Gaussian Probability Curve.
(11) MODULATION TRANSFER FUNCTION is defined as
MTF = [(Vmax - Vmin) / (Vmax +
Vmin)] x 100 [%]. MTF is measure at glass surface. Vmax: maximum output voltage
at 300 lp/inch (At 1/2 of the optical Nyquest Frequency)
Vmin: minimum output voltage at 300 lp/inch.
7.0
ELECTRICAL CLOCKING CHARACTERISTICS.
(Ta =25
O
C)
MAX
UNITS
ITEM
SYMBOL
VIH
VIL
(1)
IIH
(1)
IIL
(1)
FCLK
(2)
Note (3)
(1)
TABLE 7.1 CLOCK AMPLITUDE AND DUTY CHARACTERISTICS
CONDITION
For values
see the notes
CLOCK
INPUT
VOLTAGE
CLOCK
INPUT
CURRENT
CLOCK
FREQUENCY
MIN
SPECIFICATION
TYP
See note
(1) for
values
See note
(1) for
values
2.5
MHz
PAGE 5 OF 10 - PI630MC-A6C, 11/19/03
AMI [ AMI SEMICONDUCTOR ]
