Datasheet

MLX90255BA

Linear Optical Array

MLX90255BA Linear Optical Array

Page 3

Rev 1.2 08-Aug-01

3901090255

MLX90255BA Electrical specifications

All tests are made with 0.7ms integration time, at 1

0mW/cm² light = 100% at 25°C at 880nm and with a

clock speed of 500kHz in, 250kHz out, and 500kHz, unless otherwise specified in the Test Conditions.

100 % light under Test Conditions means that the light is set in such a way that there is 2.4V at the output

of the chip.

Parameter

Symbol Test Conditions

Min

Typ

Max

Units

Illumination

Illum100 At 25°C, 2.4V at output

11.4

14

16

µW/cm²

Average analog output (1)

VaoLight At 25°C, 100% light

1.5

1.7

2.1

V

Average analog output

Initial offset At 25°C, 0% light

0

0.15

0.3

V

Average analog output

VaoDark At 125°C, 0% light

0

0.40

1.4

V

Highest Dark Pixel

Vaodarkmax At 125°C, 0.25ms integration time

0.8

V

Non Linearity

Nlao1

All Temp

±0.5% ±1.2%

FS

Pixel Response Non Uniformity (2)

PRNU

All Temp, 100% light

±4.0% ±8.5%

FS

Pixel Interaction Test (3)

PIT

AT 25°C

5%

FS

Noise Level (4)

Vn

All Temp

3

6

mV (RMS)

Hold spec, same as PRNU

PRNUH All Temp, 100% light, 62.5kHz

±4.0% ±8.5%

FS

Output Settling Time

Ts

All Temp

450

750

ns

Array Lag (5)

Alag

At 25°C

0.5%

FS

Dark Signal Non Uniformity (6)

DSNU

At 25°C

At 125°C

80

140

120

440

mV

mV

Analog Output Saturation

All Temp

3.0

V

Change in sensitivity with

Temperature at 880nm (7)

0

0.3

0.8

%/°C

Operating Free Temp

-40

125

°C

Supply Current (8)

Idd

2

5

8

mA

(0) After power on, the first integration scan is not guaranteed correct. This scan is needed for initializing digital levels on chip. After a SI and 133 proper

CLK signals, the system is fully initialized and all further scans are valid. The next SI will provide a valid scan.

(1) Absolute Light measurements are very test-setup dependent and should be regarded with caution. Relative measurements are possible with

accuracy.

(2) PRNU is defined as the worst case deviation of any PixelValue (pixel 3 till 130) to the average light value. PixelValue = (Vout of a pixel at 100% light

– Vout of same pixel at 0% light) The 90255BA has a cosign shaped gain: external pixels have 15% more gain than middle pixels.

(3) PIT = (Vout of pixel 132 @ 10µW – Vout of pixel 132 @0µW) / (Vaverage @10µW – Vaverage @10µW)

(4) Noise: We compare 5 different measurements, normalize them and then take the RMS value.

(5) Array Lag is defined as: (Vaverage 0µW

light level. (there can still be some light effects). 0µW

(6) DSNU is defined as: (max Vout of pixel I @ 0% light) - (min Vout of pixel j @ 0% light) for pixels 3 thru 130

(7) Sensitivity always increases with rising temperature.

(8) Idd is measured with Rload disconnected from the output pin.