InGaAs area image sensor
The G12242-0707W has a hybrid structure consisting of a CMOS readout circuit (ROIC: readout integrated circuit) and back-illuminated InGaAs photodiodes. Each pixel is made up of an InGaAs photodiode and a ROIC electrically connected by indium bumps. The timing generator in the ROIC provides an analog video output and AD-TRIG output which are obtained by just supplying a master clock (MCLK) and master start pulse (MSP) as digital inputs from external sources.The G12242-0707W has 128 × 128 pixels arrayed at a 20 μm pitch and their signals are read out from a video line. Light incident on the InGaAs photodiodes is converted into electrical signals which are then input to the ROIC through indium pumps. Electrical signals in the ROIC are converted into voltage signals by charge amplifiers and then sequentially output from the video line by the shift register. The G12242-0707W is hermetically sealed in a TO-8 package together with a two-stage thermoelectric cooler to deliver low-cost yet highly stable operation.
|Spectral response range||950 to 1700 nm|
|Peak sensitivity wavelength (typ.)||1550 nm|
|Image size||2.56 × 2.56 mm|
|Pixel size||20 × 20 μm|
|Pixel pitch||20 μm|
|Number of total pixels||128 × 128 pixels|
|Frame rate (max.)||258 frames/s|
|Dark current (typ.)||0.5 pA|
|Measurement condition||Ta=25 ℃, Td=15 ℃, Vdd=5 V, PD_bias=3 V|
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