Charge shuffle & read-out timings
 
 
DETECTOR READ TIME  PIXEL READOUT RATE
Detector Format Pixel size (um) Charge shift of 1 row (us) NON
ASTRO
(sec)
FAST
(sec)
NORMAL
(sec)
SLOW
(sec)
XTRA
SLOW
(sec)
NON
ASTRO
(us/pix)
FAST
(us/pix)
NORMAL
(us/pix)
SLOW
(us/pix)
XTRA
SLOW
(us/pix)
Thompson 1K x 1K 18 12.5 28 38 60 100 160 28 38 60 100 160
Tek 1K x 1K 24 500 33 52 75 120 394 33 52 75 120 394
MITLL 2 2K x 4K 15 46.5 60 95 160 300 940 6.5 10.5 16 32 104
MITLL 3 2K x 4K 15 46.5 58 108 143 285 924 6.5 10.5 18 34 106

You can now see that the rate of charge shifts row-to-row is typically 3 orders of mag faster than the time to read out through the amplifiers.

Note that the Thompson and the Tek timings are with the old version of the AAO-1 controller. (A small qualification is that the Thompson did not really have an XTRASLOW mode, more a CTE-enhanced mode.)

In 1998, the AAO-1 controller was upgraded with new hardware: these are the timings reflected for the MITLL chips.