AD131 Photodetector Module 190 nm to 4.8 μm
                 

• 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

FEATUER VALUE
Wavelength Range Depend on Sensor type
A/D Resolution 16 bit
A/D Conversion Rate 500 kSPS
Response Rate USB 2.0
Time Constant 10 μs, 100 μs, 1 ms, 10 ms(selectable)
Low Pass Filter 1/3 Hz, 1 Hz, 10 Hz, 100 Hz(selectable)
Phase Shift 1-180 degrees(selectable)
Amplification Gains X1 to X10(selectable)
Phase Lock Loop Voltage Input 0-5 V Optical Chopper Reference Signal
Trigger Input Voltage 0-5 Vdc TTL
Supply Voltage 100-240 VAC
USB 2.0 Transfer Rate 480 Mbits/sec

SP Part # Detector Type Size Range Temp Sensitivity Dark resistance
or Current
AD421 Si 5.8 X 5.8 190-1000 25℃ 0.4 A/W at 720nm 20 pA
AD427* Pbs 3 X 3 1000-2900 25℃ 5 X 10^4 V/W
at 2200nm
0.5 to 2.5 MΩ
AD429* PbSe 3 X 3 1500-4800 25℃ 5 X 10^2 at 4μm 0.3 to 1.5 MΩ
AD430 InGaAs 3 dia 800-1700 25℃ 0.95A/W at 1.55μm 15 nA
AD431 Si/InGaAs 2.4 X 2.4 300-1700 25℃ 0.45 A/W at 0.94μm 30 pA
1 dia 25℃ 0.55A/W at 1.55 μm 1 nA
The following require the AD131-TC Thermoelectric Controller module in addition to the AD131 Photodetector module
AD427-C* Cooled PbS 4 X 5 1000-2900 -10℃ 8 X 10^4 at 2.2μm 0.5 to 10 MΩ
AD429-C* Cooled PbSe 3 X 3 1500-4800 -10℃ 1 X 10^3 at 4μm 1.7 to 7 MΩ
AD430-C Cooled InGaAs 3 dia 800-1700 -10℃ 0.95A/W at 1.55μm 1 nA
AD431-C Cooled Si/ InGaAs 2.4 X 2.4 300-1700 25℃ 0.45(25℃) at 0.94μm 30 pA
1 dia -10℃ 0.55 at 1.55μm 0.07 nA
* Requir 450 Hz chopped optical signal

Compact, Convenient, Affordable

The AD131 is a computer controlled data acquisition device for photodiode detectors, covering a wide wavelength range with Si, InGaAs, PbS, ans PbSe photocells from the AD4x series. The unit contains an internal programmable charge integration amplifier, a 20-bit A/D converter, and a microprocessor with a RS232 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 Digikrom 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.
AD131 Labview Source(USB) ▶  Download
		
AD131 Labview Executable Demo(USB) ▶  Download