NIR-256×1 InGaAs linear detector


NIR-256×1 InGaAs linear detector is mainly composed of low noise readout circuit (ROIC), P-I-N junction InGaAs photosensitive chip and primary thermoelectric cooler (TEC), and adopts ceramic package.This manual only describes this detector.



Product model


Name Model Price
NIR-256×1 InGaAs linear detector   [PDF]  [RFQ]

PL-1700-IGLA-AR50250-2561
Stock NO.: E80040505
[Please inquire]


Parameter



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)

256.4.png


Schematic diagram of working principle and connection mode of detector

256.6.png

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

256.2.png

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.

256.3.png

Schematic diagram of detector pins

256.5.png

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


Application

● Near infrared spectrometer



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