The ML8540WD is a medium-resolution (approximately 2,000 pixels) infrared image sensor that allows noncontact temperature measurement of an object and easy obtaining of thermal images. The ML8540WD receives infrared rays from an object at 48×47 (2,256) pixels resolution, converts them into voltage through a thermopile, and selects pixels in accordance with external CPU clocks to output signals. The built-in op-amp circuit amplifies the infinitesimal voltage of the thermopile for conventional output signal level. Furthermore, the temperature sensor circuit is used to output a temperature-compensated signal by measuring the chip temperature.
Pixel selection is made with a clock signal output from customer’s host CPU. This allows thermal images to be easily obtained by capturing an amplified signal with host ADC and performing additional signal processing.
|Power supply voltage||5V|
|Operating temperature||-20 to +70°C|
|IR sensor||48×47(2,256) pixels
-30 to 60°C (10bit)
-30 to 300°C (12bit)
*Depends on ADC resolution
|Peripheral circuit||Temperature sensing circuit, Amp., Reference power supply|
|Readout rate||4 frames per second|
|Operating current (typ.)||<5mA with peripheral circuit in use
<1mA with peripheral circuit not in use
Note: Wafer sales only