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4LS

Typical Operating Characteristics

Datasheet

• PUBLIC

DS000542

• v3-01 • 2022-Nov-17

114

│ 19

6.2

Spectral Characteristics

Figure 21:

4LS Monochrome QE(1)(2)

Figure 22:

4LS RGB + Monochrome QE(1)(2)(3)

(1)

The results were obtained using a tunable LED light source, with a built-in integrating sphere, covering the range of

410 nm

– 940 nm. The ADC ramp gain was adjusted to the equivalent of 1 V swing, for 12-bit ADC mode at 60 MHz

(MCLK). The sensors temperature was approximately 60 ºC (uncontrolled temperature environment). The values

presented are for the default configuration of Full Well around 20 ke- (STS3 Register bits [3:0] = 0x0). Sensor supply

levels were the typical ones: VDDA = 3.3 V and VDDD = 1.8 V. The set Readout mode was 1-To-1. The results are valid

for all variants, once they all share the same silicon.

(2)

The settings used to get these values are those recommended by the European Machine Vision Association standard

1288 from the Machine Vision Sensors and Cameras. https://www.emva.org/standards-technology/emva-1288/

(3)

The RGB sensor QE figure is affected by the coupling of the adjacent lines. There is electrical crosstalk from the Red

line to the Monochrome

line and from the Green line to the Blue line. This effect causes a “bump” in the PTC which in

turn affects the accuracy of the conversion gain calculation and therefore, the QE results. For RGB sensors this effect is

more visible on Top as both Red and Monochrome lines are highly responsive to red illumination, while the Bottom lines

are response in different spectral ranges. For monochrome sensors this effect is equally visible on both and bottom,

once all lines are equally responsive.

370

470

570

670

770

870

970

Wavelength [nm]

QE 4LS15K Mono

370

470

570

670

770

870

970

Wavelength [nm]

4LS15K Blue

4LS15K Green

4LS15K Red

4LS15K Monochrome

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