IRAC Detector Arrays
InSb (1-5.5 ?m) for channels 1 & 2, Si:As IBC (2-28 ?m) for channels 3 & 4
Made by Raytheon Infrared Center of Excellence (SBRC)
- CRC 744 Mux
- 256x256 pixels (30 ?m)
- 1E+5 e– well depth
- ᢛ.5% operability
- Read noise ~ 10 e– at Fowler N=32
- Dark current ə e–/sec
- QE of ᢈ% for InSb, ᡪ% for Si:As
- ə mW dissipation per array
Fowler Sampling used
- N=1 to 64 possible, Frame times of 0.4 to 200 s
- Fowler arithmetic performed in IRAC, only single (result) image stored on S/C and transmitted to ground
- Subarray Mode - a 32x32 pixel section of the arrays are read out, Frame times of 0.02 to 2 sec are implemented