AD131 Photodetector Module 190nm to 4.8μm

● Combines SP photodiode detector, programmable charge integrator, and data conversion in a compact package.

● Expandible with add-on modules for cooled sensor capability.

● Null function for background noise subtraction.

● Programmable gain ranges.

● Windows® based data acquisition software included.

● Easy to install and use on any SP Monochromator.

Internal data averaging.

 ad131.jpg

  Compact, Convenient, Affordable

The AD131 is a computer controlled data acquisition device for photodiode detectors, covering a wide wavelength range with Si, InGaAs, PbS, and PbSe photocells from the AD4x series. The unit contains an internal programmable charge integration amplifier, a 16-bit A/D converter, and a microprocessor with a USB2.0 interface. Signal processing functions take place internal to the AD131 to greatly reduce the noise level of the measured signal, including Correlated Double Sampling (CDS) and signal oversampling for digital filtering. Windows® based software allows for stand-alone operation or integrated control and data acquisition with any of the Digikröm line of monochromators.
Adding the AD131-TC Thermoelectric Controller module to the AD131 enables the use of AD4x series heads with cooling capability (designated by a "-C" on the model name). AD4x heads are easily exchanged on the same AD131 unit.

SP Part #

Detector Type

Size

Range

Temp

Sensitivity

Dark resistance or current

AD421

Si

5.8x5.8

190-1000

25°C

0.4 A/W at 720 nm

20 pA

AD427*

PbS

3x3

1000-2900

25°C

5x104 V/W at 2200 nm

0.5 to 2.5 MΩ

AD429*

PbSe

3x3

1500-4800

25°C

5x102 at 4 µm

0.3 to 1.5 MΩ

AD430

InGaAs

3 dia

800-1700

25°C

0.95 A/W at 1.55 µm

15 nA

AD431

Si/InGaAs

2.4x2.4

300-1700

25°C

0.45 A/W at 0.94 µm

30 pA

1 dia

25°C

0.55 A/W at 1.55 µm

1 nA

   The following require the AD131-TC Thermoelectric Controller module in addition to

   the AD131 Photodetector module

SP Part #

Detector Type

Size

Range

Temp

Sensitivity

Dark resistance or current

AD427-C*

Cooled PbS

4x5

1000-2900

-10°C

8x104 V/W at 2.2µm

0.5 tp 10 MΩ

AD429-C*

Cooled PbSe

3x3

1500-4800

-10°C

1x103 V/W at 4 µm

1.7 to 7 MΩ

AD430-C

Cooled InGaAs

3 dia

800-1700

-10°C

0.95 A/W at 1.55 µm

1 nA

AD431-C

Cooled Si/InGaAs

2.4x2.4

300-1700

25°C

0.45 (25°C) at 0.94 µm

30 pA

1 dia

-10°C

0.55 at 1.55 µm

0.07 nA

   *Requires 450 Hz chopped optical signal

Feature

Value

Wavelength Range:

Depends on Sensor type

A/D Resolution:

16 bit

A/D Conversion Rate:

500kSPS

Response Rate:

USB 2.0

Time Constant:

10µS, 100µS, 1mS, 10mS (selectable)

Low Pass Filter:

1/3Hz, 1Hz, 10Hz, 100Hz (selectable)

Phase Shift:

0-180 degrees (selectable)

Amplification Gain:

x1 to x10 (selectable)

Phase Lock Loop Voltage Input:

0-5V optical chopper reference signal

Trigger Input Voltage:

0-5Vdc TTL

Supply Voltage:

100-240 Vac

USB2.0 Transfer Rate:

480 Mbits/S

Software:

Windows® control program for stand-alone use or integrated with SP Monochromators.

   If you need more information about this item,

   please call (877)208-0245 x100 or email sales@spectralproducts.com




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