THORLABS PDA400 Operating Manual

PDA400 Operating Manual - Switchable Gain, Amplified InGaAs Detector

Description:

The PDA400 is an amplified, switchable-gain, InGaAs detector designed for detection of light signals from DC to 10
MHz. A five-position rotary switch allows the user to vary the gain in 10 dB steps. A buffered output drives a 50Ω
load impedance up to 5 volt. The PDA400 housing includes a removable threaded coupler 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 PDA400 has an 8-32 tapped mounting hole with a 0.25" mounting depth and includes a 120VAC power AC/DC
supply. The PDA400-EC has an M4 tapped mounting hole and includes a 230VAC AC/DC power supply.

Specifications:

Detector
Detector
Active Diameter
Response
Peak Response
Bandwidth
NEP (1310nm, 0dB)
NEP (1310nm, 10dB)
NEP (1310nm, 20dB)
NEP (1310nm, 30dB)
NEP (1310nm, 40dB)
Output Voltage (50Ω)
1
Output Voltage
1
Output Impedance
1
Load Impedance
Gain Steps
Gain Switch
On / Off Switch
Output
Damage Threshold
2
Optical Head Size
Weight
Accessories
Storage Temp
Operating Temp
AC Power Supply
Input Power
Note 1: The PDA400 has a 50Ω series termination resistance (i.e. in series with amplifier output). This forms a voltage divider
with any load impedance (e.g. 50Ω load divides signal in half).
2: Newer PDA's have a smaller package diameter to easily fit into Thorlabs cage plate assemblies. Also note that the
length includes the SM1T1 mounting adapter and the BNC / power switch.

Setup

•
Unpack the optical head, install a Thorlabs TR-series ½" diameter post into the 8-32 (M4 on -EC version) tapped
hole on the bottom of the head, and mount into a PH-series post holder.
•
Connect the power supply 5-pin DIN plug into the mating receptacle on the PDA400.
•
Plug the power supply into a 50-60Hz, 100-120VAC outlet (220-240VAC for -EC version).
PO Box 366, 435 Route 206N, Newton, NJ 07860
Ph (973) 579-7227, Fax (973) 300-3600, http://www.thorlabs.com
InGaAs 0 dB Setting
1 mm
800 to 1750 nm
0.95 A/W @ 1550
nm
DC to 10MHz
-12
8.2 x 10 W/√Hz
-12
10 dB Setting
6 x 10 W/√Hz
-12
3.8 x 10 W/√Hz
-12
3.4 x 10 W/√Hz
-12
2.9 x 10 W/√Hz
0 to 5V
0 to 10V
20 dB Setting
50Ω
Hi -Z to 50Ω
0, 10, 20, 30, 40
dB
5-Pos Rotary
Switch
Toggle
BNC
100mW CW 30 dB Setting
2
0.5J/cm 10ns PW
φ1.425" x 1.45"
60 grams
SM1T1 Coupler
-40 to 125°C
40 dB Setting
-40 to 85°C
AC - DC Converter
100-120VAC,
(220_240VAC -EC
version)
50-60Hz, 5W
2151-D02 REV F 8/15/2005
Performance
1
Transimpedance Gain
1
Trans. Gain (50Ω)
Bandwidth
Noise (RMS) 0.28 mV
Offset
-5 mV
1
Transimpedance Gain
1
Trans. Gain (50Ω)
Bandwidth
Noise (RMS)
0.30 mV
Offset
-5 mV
1
Transimpedance Gain
1
Trans. Gain (50Ω)
Bandwidth
Noise (RMS) 0.36 mV
Offset
-10 mV
1
Transimpedance Gain
1
Trans. Gain (50Ω)
Bandwidth
Noise (RMS)
0.48 mV
Offset -20 mV
1
Transimpedance Gain
1
Trans. Gain (50Ω)
Bandwidth
Noise (RMS) 0.74 mV
Offset -100 mV
Page 1 of 5
min typical
4
1.5 x 10 V/A
4
0.75 x 10 V/A
10 MHz
0.33 mV
6 mV
4
4.7 x 10 V/A
4
2.35 x 10 V/A
2.2MHz
0.35 mV
8 mV
5
1.5 x 10 V/A
5
0.75 x 10 V/A
700kHz
0.40 mV
10 mV
5
4.7 x 10 V/A
5
2.35 x 10 V/A
160kHz
0.53 mV
20 mV
6
1.5 x 10 V/A
6
0.75 x 10 V/A
50kHz
0.81 mV
20 mV
max
0.44 mV
15 mV
0.45 mV
15 mV
0.46 mV
20 mV
0.60 mV
50 mV
1.0 mV
100 mV