This device extends Teledyne e2v’s family of scientific CCD sensors. The CCD231 has been designed to provide a large image area for demanding astronomical and scientific imaging applications. Back-illuminated spectral response combined with very low readout noise give exceptional sensitivity.
The sensor has an image area having 6144 x 6160 pixels, split read-out registers at both top and bottom with charge detection amplifiers at both ends. The pixel size is 15 µm square. The image area has four separately connected sections to allow full-frame, frame transfer, split full-frame or split frame-transfer modes. Depending on the mode, the read-out can be through 1, 2 or 4 of the output circuits. A gate-controlled drain is also provided adjacent to each of the registers to allow fast dumping of unwanted data.
The output amplifier is designed to give very low noise at read-out rates of up to 3 MHz. The low output impedance simplifies the interface with external electronics and the optional dummy outputs are provided to facilitate rejection of common parasitic feed-through.
The package provides a compact footprint with guaranteed flatness at cryogenic temperatures. Connections are made at the top and bottom of the device via two flexi connectors that also provide a thermal break. The sides may be close butted if needed.
Specifications are tested and guaranteed at 173 K (–100oC).
The CCD231 devices described here are non-inverted (non-MPP) types.
