Technical Specifications

Model Specific Specifications^•1

Model	Zyla 5.5	Zyla 4.2 PLUS
Sensor type	Front Illuminated Scientific CMOS
Active pixels (W x H)	2560 x 2160 (5.5 Megapixel)	2048 x 2048 (4.2 Megapixel)
Sensor size	16.6 x 14.0 mm 21.8 mm diagonal	13.3 x 13.3 mm 18.8 mm diagonal
Pixel readout rate (MHz)	200 (100 MHz x 2 sensor halves) 560 (280 MHz x 2 sensor halves)	Slow Read 216 (108 MHz x 2 sensor halves) Fast Read 540 (270 MHz x 2 sensor halves)
Read noise (e-) Median [rms] •2	Rolling Shutter Global Shutter @ 200 MHz 0.9 [1.2] 2.3 [2.5] @ 560 MHz 1.2 [1.6] 2.4 [2.6]	Rolling Shutter @ 216 MHz 0.90 [1.1] @ 540 MHz 1.10 [1.3]
Maximum Quantum Efficiency •3	64%	82%
Sensor Operating Temperature Air cooled Water cooled	0ºC (up to 30ºC ambient)* -10ºC**	0ºC (up to 27ºC ambient) -10ºC**
Dark current, e-/pixel/sec @ min temp •4 Air cooled Water cooled	0.10 0.019
Readout modes	Rolling Shutter and True Global Shutter (Snapshot)	Rolling Shutter and Global Clear •7
Maximum dynamic range	33,000:1
Photon Response Non-Uniformity (PRNU) Half-light range Low light range	< 0.01% < 0.1%
Pre-defined Region of Interest (ROI)	2048 x 2048, 1920 x 1080, 1392 x 1040, 512 x 512, 128 x 128	1920 x 1080, 1392 x 1040, 512 x 512, 128 x 128
User defined ROI (granularity	Yes (1 pixel) ***
Data range	12-bit (fastest USB 3.0 speeds) and 16-bit (maximum dynamic range)
Interface options	USB 3.0•8 Camera Link 10-tap
* Max ambient for Zyla 5.5 aircooled models manufactured prior to Feb 2015 is 35°C ** Cooling temperature must be above the dew point *** Minimum ROI size: 4 x 8 (W x H) possible for 12- or 16-bit modes and for both Camera Link 10-tap and USB 3.0 models

General Specifications^•1

Pixel size (W x H)	6.5 µm
Pixel well depth (e-)	30,000
Linearity (%, maximum)•5 Full light range Low light range (< 1000 electrons signal)	Better than 99.8% Better than 99.9%
MTF (Nyquist @ 555 nm)	45%
Pixel binning	Hardware binning: 2 x 2, 3 x 3, 4 x 4, 8 x 8
Anti-blooming factor	x 10,000
I/O	External Trigger, Fire, Fire n, Fire All, Fire Any, Arm
Trigger Modes	Internal, External, External Start, External Exposure, Software Trigger
Software Exposure Events•6	Start exposure - End exposure (row 1), Start exposure - End exposure (row n)
Hardware timestamp accuracy	25 ns
Internal memory	1 GB

Footnotes

1. Figures are typical unless otherwise stated.

2. Readout noise is for the entire system and is taken as a median over the sensor area excluding any regions of blemishes. It is a combination of sensor readout noise and A/D noise.

3. Quantum efficiency of the sensor at 20°C as supplied by the manufacturer.

4. Dark current measurement is taken as a median over the sensor area excluding any regions of blemishes.

5. Linearity is measured from a plot of Signal vs. Exposure Time, in accord with EMVA 1288 standard.

6. Software Exposure Events provide rapid software notification (SDK only) of the start and end of acquisition, useful for tight synchronization to moving peripheral devices e.g. Z-stage.

7. ‘Global Clear’ is an optional keep clean mechanism that can be implemented in rolling shutter mode, which purges charge from all rows of the sensor simultaneously, at the exposure start. The exposure end is still rolling shutter. It can be used alongside the Fire All output of the camera and a pulsed light source to simulate Global Exposure mechanism, albeit less efficiently than the true Global Shutter exposure mode of Zyla 5.5. Furthermore Global Clear differs from true Global Shutter in that it can only be used in ‘non-overlap’ readout mode, i.e. sequential exposure and readout phases rather than simultaneous.

8. Zyla USB 3.0 models should work with any modern USB 3.0 enabled PC/laptop (provided hard drives or RAM is sufficient to support data rates) as every USB 3.0 port should have its own host controller. Zyla USB 3.0 models also ship with a USB 3.0 PCI card as a means to add a USB 3.0 port to an older PC, or as a diagnostic aid to interoperability issues or to ensure maximum speed.