Features
● Positive irradiation structure
● High aspect ratio photosensitive surface
● High sensitivity
● Internally integrated thermoelectric
Specifications
Optical and electrical performance
Terms | TYP |
Response spectrum (μm)*1 | 0.95 ±0.05~1.7 ±0.05 |
Pixel filling rate(%) | 100 |
Quantum efficiency (%) | ≥65 |
Peak detection rate (cm·√Hz/W ) | ≥1 × 1012 |
Peak sensitivity (A/W) | ≥0.8 |
Effective pixel rate (%)*2 | 100 |
Response inconsistency (%) | <4 |
Playback mode | IWR 、ITR，Optional |
Readout rate(MHz) | ≥10 |
Maximum frame rate(fps) | >20k |
Gain gear | 8 |
Saturation voltage(V) | 1.6 |
Conversion gain (nV/e-) | Gain gear1：16000 Gain gear2：8000 Gain gear3：4000 Gain gear4：2665 | Gain gear5：1775 Gain gear6：840 Gain gear7：325 Gain gear8：160 |
Notice：
*1 Focal plane temperature=25℃
*2 The percentage of pixels whose response signal deviates from the mean value less than a certain range
Response spectrum(TYP)
Schematic diagram of working principle and connection mode of detector
Mechanical capacity
Terms | TYP |
Length x width x height (mm) | 28 × 15 × 6.2 |
Weight (g) | ~9 |
Focal Plane Scale | 256 × 1 |
Pixel Center Distance (μm) | 50 |
Pixel Size (μm) | 50 ×250 |
Sensing Area (mm) | 12.8 ×0.25 |
Dimensions and Pin definitions
Mechanical Specifications
The detector is packaged In ceramic form, filled with atmospheric pressure high purity nitrogen, the shell is made of alumina ceramic, the cover plate and pin are made of FeNiCoSi alloy, the surface is electroplated Ni/Au layer, the window welding is IN brazing, and the cover is resistance welding。The dimensions of the detector are 28mm (L)×15mm (W)×6.2mm (H). There are 30 pins with Φ0.45mm leading from the back on the shell, and the spacing of the pins is 1.778mm. They are used for the input of focal plane power supply and instruction, the electrical extraction of focal plane detection signal and temperature sensor, and the power input of thermoelectric refrigerator.
The appearance and dimensions of the mechanical interface are shown in the following
Optical configuation
This product uses a 256× 1 yuan InGaAs focal plane with one redundant element at each end, that is, the number of pixels in the whole body is 258× 1. Columns 2 to 257 are recommended for actual use. The pixel shape is rectangular, the sensitive size is 50μm×250μm, the structure is arranged in a "one" font, and the longitudinal center distance of the pixel is 50μm, as shown in the following figure.
The design distance between the sensitive surface of the detector and the upper surface of the package structure is 1.86± 0.1 mm, the design distance between the sensitive surface and the lower surface of the window is 1.16 ± 0.1 mm, and the calculated distance between the sensitive surface and the mounting surface/bottom of the shell is 4.34± 0.1 mm. The window material is sapphire, the thickness is 0.5±0.05mm, the window refractive index is 1.76, the surface is plated with AR film, the response band transmittance is >95%, the window transmittance area is 16mm×3mm.
Schematic diagram of detector pins
Pin Names | Input/Output | Pin function | Reference value |
GND | Input | ground wire | Working current<10mA |
CLK | Input | A clock that provides a time reference for circuit driven timing | Digital voltage;
High level 3.3V, low level 0V |
VDDD | Input | Digital circuit power supply, providing voltage to the digital circuit in the detector | Dc 3.3V, working current needs to be<5mA |
VDDA | Input | An analog circuit power supply that provides voltage to the analog circuit in the detector | Dc 3.3V, working current needs to be<25mA |
SC1 、SC2、 SC3 | Input | Detector gain selection, control detector output signal size, the control method is detailed in the timing section | Digital voltage
High level 3.3V, low level 0V |
ST | Input | Trigger the pulse, and the circuit begins to collect signals | Digital voltage
High level 3.3V, low level 0V |
RESET | Input | Reset the signal and control the length of the circuit acquisition cycle. See the timing section for the control method | Digital voltage
High level 3.3V, low level 0V |
SH1 、SH2、 SH3 | Input | Sample the control signal, set the pixel integration time, and change the readout mode. See the time sequence section for the control method | Digital voltage
High level 3 3V, low level 0V |
Pin Names | Input/Output | Pin function | Reference value |
VBOUT | Input | Buffer offset to provide the bias voltage for the total buffer of the circuit | DC2.3V |
VBOP | Input | The amplifier is biased to provide the bias voltage for the signal amplifier | DC2.3V~2.5V ，Recommend 2.4V |
VREF | Input | Reference voltage, which provides a reference value for the output signal | DC2.3V |
VNDET | Input | Chip common N | DC2.3V |
VBUF | Input | When in use, short connect with VBOUT pin | DC2.3V |
STBUF | Input | When used, it should be short connected with the ST pin | Digital voltage
High level 3.3V, low level 0V |
VOUTR | Output | Reference signal | 0.5V~2.5V |
VOUTS | Output | The output signal is subtracted from the reference signal of the same channel to obtain the actual detector response signal value | 0.5V~2.5V |
TS | - | The temperature sensor measures the resistance value through two pins to feedback the operating temperature of the focal plane |
|
TEC+、TEC- | - | The input voltage of the thermoelectric refrigerator is + pin for refrigeration when connected to high potential, and for heating when connected to low potential Empty foot | The rated voltage and current of TEC shall not be exceeded |
NC | - | The input voltage of the thermoelectric refrigerator is + pin for refrigeration when connected to high potential, and for heating when connected to low potential Empty foot |
|
Notice：
The DC input directly affects the overall noise of the detector, so the ripple noise of the DC input power supply has the following requirements：
1) VDDA＜2mV
2) VDDD＜10mV
3) VREF 、VNDET＜0.3mV
4) VBOP 、VBOUT＜1mV
