THORLABS PDA25K Operating Manual

www.thorlabs.com
PDA25K Operating Manual - Switchable Gain, Amplified GaP Detector
Description:
The PDA25K is an amplified, switchable-gain, GaP detector designed for detection of light signals over a 150 –
550 nm wavelength range. An eight-position rotary switch allows the user to vary the gain in 10 dB steps. A buffered
output drives 50 load impedances up to 5 volt. The PDA25K housing includes a removable threaded coupler
(SM1T1) and retainer ring (SM1RR) that is compatible with any number of Thorlabs 1" threaded accessories. This
allows convenient mounting of external optics, light filters, apertures, as well as providing an easy mounting
mechanism using the Thorlabs cage assembly accessories.
The PDA25K has two #8-32 tapped mounting holes with a 0.25" mounting depth and includes a 120 VAC power
AC/DC supply. The PDA25K-EC has two M4 tapped mounting holes and includes a 230 VAC AC/DC power supply.
Specifications:
Detector
Active Area
Surface Depth
Wavelength Range
Peak Wavelength (
Peak Response
1
Output Voltage (50Ω)
(Hi-Z)
Output Impedance
Max Output Current
Load Impedance
Gain Adj. Range
Gain Steps
13050-S01 Rev H 2/10/2012
General Specifications
GaP PIN
2
4.8 mm (2.2 mm x 2.2 mm)
0.12" (3.1 mm)
150 – 550 nm
) 440 nm
p
0.12 A/W @ 
5 V (max)
10 V (max)
50 Ω
100 mA
50Ω – Hi-Z
70 dB
8x 10 dB steps
Figure 1 – PDA25K Spectral Responsivity
Gain Switch
On / Off Switch
Optical Head Size
p
Accessories
AC Power Supply
Power Supply
Input Power
Storage Temp
Operating Temp
8-Pos Rotary
Slide
Output BNC
2.76" x 2.06" x 0.88"
70.1 x 52.3 x 22.4 mm
3
Weight 0.15 / 2.1 lbs
SM1T1, SM1RR
AC-DC Converter
31W
4
100-120 VAC, 50 – 60 Hz
(220 - 240 VAC -EC)
-55 to 125 C
0 to 40 C
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