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TEK4 Parameters with UltraDAS + SDSU Gen.2

STOP PRESS : TEK4 has blobs that reduces it's sensitivity in the U band.  16/2/2000

Device Identification

Chip name TEK4
Year of manufacture 1993
Serial number 1675BR10-04
First light on La Palma July 1994
Description Thinned AR coated, converted to run with UltraDAS January 2001.

Operational Characteristics

    Speed  Slow Fast
    Bias(ADU) 1130 1100
    Gain(e/ADU) 1.43 3.48
    Noise(e) 4.6 7.0
    Noise (ADU) 3.2 2.0
    Linear to(ADU) 
    {also see graphs below}
    63K 63K
    Readout time(s) 39 24
Rapid Spectroscopy mode now available for TEK4 only 

Windowing is available.


Binning Properties
Noise in electrons
Binning factor
Slow readout
Fast readout
2 x 2
3 x 3
4 x 4


Linearity was measured by R.Hijmering on the 2nd January 2002 using this method.

Vertical CTE 0.999997
Horizontal CTE  0.999994

Physical Characteristics

X Pixel size 24 microns
Y Pixel size 24 microns
X size in pixels of digitised area 1100
Y size in pixels of digitised area 1040
X size of useful imaging area 1024
Y size of useful imaging area 1024
X start of useful imaging area 53
Ystart of useful imaging area 0
LN2 capacity of cryostat 2.5 litres
Cryostat window thickness 4 mm
Distance from window to CCD 11.4 mm
Cryostat window size 40mm x 40mm

Operational Parameters

Flooding type none
Operating temperature 168K
Preferred amplifier A,D failed 3/95
Anti-blooming available no

Measured Characteristics


Dark current <6 e/hour
Chip flatness  57 micron convex bow


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Last modified: 21 November 2010