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XEDITION

AD131 Photodetector Module [190nm to 4.8μm] Detector

Compact, Convenient, Affordable

 

- 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

 

The AD131 is a computer controlled data acquisition device for photodiode detectors, coverin 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 USB 2.0 interface. Signal processing functions take place internal to the AD131 to greatly reduce the noise level of the measured signal, including Correclated 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 Themoelectric 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

Temperature

Sensitivity

Dark Resistance / Current

AD421 Si 5.8 x 5.8 190 - 1000 25°C 0.4A/W @ 720nm 20pA
AD430 InGaAs 3⌀ 800 - 1700 25°C 0.95A/W @ 1.55µm 15nA
AD431 Si
InGaAs
2.4 x 2.4
1⌀
300 - 1700 25°C
25°C
0.45A/W @ 0.94µm
0.55A/W @ 1.55µm
30pA
1nA

 

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

 

SP Part #

Detector Type

Size (")

Range

Temperature

Sensitivity

Dark resistance / Current

AD430-C Cooled InGaAs 3⌀ 800 - 1700 -10°C 0.95A/W @ 1.55µm 1nA
AD431-C Cooled Si
Cooled InGaAs
2.4 x 2.4
1⌀
300 - 1700 25°C
-10°C
0.45 (25°C) @ 0.94µm
0.55 @ 1.55µm
30pA
0.07nA

 

Model

AD131

Wavelength Range Dependent on Sensor Type
A/D Resolution 16-bit
A/D Conversion Rate 500 kilo-samples per second (kSPS)
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° (selectable)
Amplification Gain x1 to x10 (selectable)
Phase Lock Loop Voltage Input 0 - 5V optical chopper reference signal
Trigger Input Voltage 0 - 5V DC TTL
Supply Voltage 100 - 240V AC
USB 2.0 Transfer Rate 480 MB/s
Software

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

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