1. LSST Camera Readout chip
ASPIC
LSST Camera Readout chip
V. Tocut, J. Jeglot, M. Moniez, F. Wicek
LAL ORSAY/IN2P3/CNRS, France
H. Lebbolo, P. Antilogus, S. Bailey, D. Martin, R. Sefri
LPNHE Paris/IN2P3/CNRS, France

2. Camera  3200 electronic channels @ 500kHz readout ck 3.2Gpix camera
Filter in stored location
L1 Lens
L2 Lens
L1/L2 Housing
Camera Housing
L3 Lens
Raft Tower
Filter in light path
3.2Gpix camera
RAFT TOWER
FEE
Raft Assembly
Flex Cable &
FEE Cage
Thermal Straps
 3200 electronic 500kHz readout ck

3. DSI vs C&S Dual Slope Integrator or Clamp&Sample
Image reconstruction: reference level + signal level
Correlated Double Sampling
CCD output signal = few µV / e-
Output signal complexity : precise timing
CCD output stage
Dual Slope Integrator or Clamp&Sample
CCD out
CCD reset
Clamp
C&S out
C&S reset
Sample
2µs

4. Back end Board & Test Bench
Tests Results
Test
Requirements (173K)
DSI (proto1)
C&S (proto1)
Cross talk
0.05% (obj: 0.01%)
0.007%
0.02%
Linearity 1%
~0.5% (proto1)
~0.5%
Noise
500ns Tint + 5nV/√Hz
17µV (600ns)
12µV
Integration time (ns)
Input Noise (µV)
700
4.97
600
5.77
500
6.08
400
7.09
300
8.20
200
10.84
100
18.10
Power
28mW/channel
Cross-talk
~0.02%
Back end Board & Test Bench
ASPIC 2 Room Temperature measurements