L-1 3300 User manual

L-1 Standards and Technology, Inc.
www.L-1.biz
Model 3300
Transimpedance
Amplier (TIA)
User Manual
Rev3

©Copyright L-1 Standards and Technol-
ogy, Inc. 2015
No part of this manual may be repro-
duced in any form or by any means
(including electronic storage and retrieval
or translation into a foreign language)
without prior agreement and written con-
sent from L-1 Standards and Technology,
Inc. as governed by United States and
international copyright laws.
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The material contained in this document
is provided “as is,” and is subject to being
changed without notice. Further, to the
maximum extent permitted by applicable
law, L-1 Standards and Technology, Inc.
disclaims all warranties, either express
or implied, with regard to this manual
and any information contained herein,
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for a particular purpose. L-1 shall not be
liable for errors or for any direct, indirect,
incidental, consequential, or other dam-
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use, or performance of this document or
of any information contained herein.
Manual Part Number
TIA-MANUAL-REV3
Edition
First Edition, November 2015
L-1 Standards and Technology, Inc.
209 High Street
New Windsor, MD 21776-0729
USA
[phone] Phone
[phone] FAX
[email protected]
www.L-1.biz
Model 3300 Transimpedance Amplier (TIA) User Manual
Rev3

Table of Contents
1 Overview 1
2 Parts List 3
3 General Specications 4
4 Identication 5
- Model 3300 Transimpedance Amplier
- Model 3310 TIA Power Supply
- Model 3311 TIA Quad Power Supply
5 Set Up 10
6 Control Software — Single Channel 11
7 Control Software — Four Channel 15
8 Command Guide 19
9 Dimensions 36
Model 3300 Transimpedance Amplier (TIA) User Manual
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Model 3300 Transimpedance Amplier (TIA) User Manual
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1 Overview
The L-1 Standards Model 3300 Transimpedance Amplier (TIA) is a precision elec-
tronic instrument designed to measure photocurrents to very low uncertainties, for
the most demanding optical metrology applications. The amplier senses the cur-
rent owing into/out of its input, which is held at constant potential (virtual ground),
and supplies a proportional analog potential at its output. There is an internal ana-
log-to-digital convertor that can be used in-lieu of an external voltmeter to measure
the output potential. The amplier has 11 effective gains that may be set either via
front panel controls or remotely through a USB or Ethernet computer interface.
A block diagram of the amplier is shown below:
There are 3 stages in the TIA: a current-to-voltage amplier with selectable gains
ranging from 103 [V/A] to 109 [V/A] by factors of 10, an electronically controlled trim-
ming attenuator with a 0% to 1% range, and a voltage amplier with gains of 1, 10
and 100 and a full scale output of +/- 10 volts. The input is held at a virtual ground,
within a millivolt of its shield. Using a low bias current op-amp, current owing onto
the input is forced through one of several feedback resistors. A network of relays
selects the feedback resistor. The internal analog-to-digital convertor samples the
output voltage with 24 bits of resolution. The convertor supports several user se-
lectable integration times and trigger modes. The available integration times include
integer multiples of both 50 Hz and 60 Hz power line cycles. All critical components
in the circuit are very stable and highly accurate. In addition, a trimming network is
included, so all gains are adjusted and set very close to their nominal values during
factory calibration.

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The computer interface is routed through a TIA power supply module. There are two
module types. Model 3310 TIA Power Supply powers one TIA and supports USB
communications with a Windows based computer, while Model 3311 TIA Quad Power
Supply powers up to four TIAs and supports both USB and Ethernet communications.
A 9-pin Mini DIN cable from a TIA power module routes both power and data to an
amplier. All data transfers are ASCII text based. To minimize the effects of ground
loops, there is galvanic isolation between the TIA analog ground and the ground
references of the USB, Ethernet, and line power cables.
The TIA can communicate with a Windows based computer via the USB port located
on its power supply. An FTDI FT232RL USB2.0 UART converter located inside the
power supply translates communications between the USB and the RS232 inter-
face that connects the power supply to the TIA. Once installed on the host PC, the
required USB driver creates a virtual COM port which emulates standard RS232
communications.
The RS232 settings used by the TIA are as follows:
Port Settings
Baud Rate 115200
Data bits 8
Parity None
Stop bits 1
Flow Control None
Note that this initialization is automatically done with the supplied LabVIEW control
demo software. The communication protocol is further dened in the “Command
Guide” section of this manual.

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2 Parts List
• Model 3300v2 Transimpedance Amplier 1 each
• 9-pin Mini DIN Cable 1 each
• BNC Cables 2 each
• Power Cable 1 each
• USB to Mini USB Cable 1 each
TIA Power Supply Required Separately: 1 each of either
• Model 3310 TIA Power Supply
OR
• Model 3311 TIA Quad Power Supply

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Voltage Output Range +/- 10 Volts Minimum
Linearity:
Differential 10 ppm
Integral 2 ppm
Input Offset Voltage <100 microvolts
Internal ADC:
Resolution 24-bits
Uncertainty 50 ppm
Stability 4 ppm/C; Longterm 40 ppm
3 General Specications
Model 3300 Transimpedance Amplier
General Specications
Sync Input Electrical Specications
Specications as a Function of Gain & Multiplier Settings
Sync Input
Edge Triggered Rising or Falling
Input Voltage 0 V to 5.5 V
Logic Low: max 1.5 volts
Logic High: min 2 volts
Uncertainty
(k=2, 25 C)
Temperature
Coefcient
(ppm/C)
3dB Roll-off (Hz)*
Input
Resistance
(Ω)
Noise Average
(1-10 Hz) (A/Hz½)
Multiplier 1,10,100 1 1 10 100 - 1 10 100
Gain
1030.005% <1 1.6E+05 > 5E+04 > 1E+04 0.10 5.6E-11 3.0E-11 2.7E-11
1040.005% <1 5.9E+04 > 5E+04 > 1E+04 0.11 6.1E-12 3.1E-12 3.3E-12
1050.005% <1 1.6E+04 1.6E+04 > 1E+04 0.15 7.2E-13 4.8E-13 4.9E-13
1060.005% 5 5.7E+03 5.7E+03 5.7E+03 0.60 1.4E-13 1.4E-13 1.2E-13
1070.005% 5 1.4E+03 1.4E+03 1.4E+03 5.1 4.0E-14 3.9E-14 4.0E-14
1080.005% 5 6.4E+02 6.4E+02 6.4E+02 50 1.2E-14 1.3E-14 1.3E-14
1090.010% 25 1.6E+02 1.6E+02 1.6E+02 500 4.1E-15 4.2E-15 4.1E-15
*Note: The trimmer network rolls-off at approximately 25 kHz. Above this frequency the gain may change by as much as 1%.

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4 Identication
Model 3300 Transimpedance Amplier—Front
Gain (V/A)
Selects the feedback resistance used in the amplier.
Multiplier
Selects the gain of the built-in voltage amplier that further amplies the voltage
output of the TIA.
Remote
When LED is lit, indicates the amplier is connected to a computer for remote
control of amplier functions.
Local
Press to take amplier out of remote mode. While in remote mode, any chang-
es made to the gain or multiplier on the front panel will not register. If button is
pressed and held for ve seconds, front LED indicators are turned off or on. If the
amplier is being controlled remotely, do not turn off and on the front LED indica-
tors using this button.

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Current In
Provides connection to detector or current source to be measured through sup-
plied BNC cable.
Voltage Out
Provides connection to a digital voltmeter or digital multimeter through supplied
BNC cable.
Pwr/Com
Provides connection to a TIA power supply through supplied 9-pin DIN cable.
Model 3300 Transimpedance Amplier—Back

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Model 3310 TIA Power Supply—Front
USB
Provides connection to a computer for remote operation.
Sync
Used to synchronize measurements of the internal analog to digital converter
with external triggers.
Amplier Pwr/Com
Provides connection to a Model 3300 Transimpedance Amplier through supplied
9-pin DIN cable.
Model 3310 TIA Power Supply—Back

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Model 3311 TIA Quad Power Supply—Front
TIA 1
Provides connection to a Model 3300 Transimpedance Amplier through supplied
9-Pin Din cable at TIA address 1. See “TIA Addressing” located in the Command
Guide section for more details about TIA addresses.
TIA 2
Provides connection to a Model 3300 Transimpedance Amplier through supplied
9-Pin Din cable at TIA address 2. See “TIA Addressing” located in the Command
Guide section for more details about TIA addresses.
TIA 3
Provides connection to a Model 3300 Transimpedance Amplier through supplied
9-Pin Din cable at TIA address 3. See “TIA Addressing” located in the Command
Guide section for more details about TIA addresses.
TIA 4
Provides connection to a Model 3300 Transimpedance Amplier through supplied
9-Pin Din cable at TIA address 4. See “TIA Addressing” located in the Command
Guide section for more details about TIA addresses.
Sync
Used to synchronize measurements of the internal analog to digital converter
with external triggers for all connected TIAs.

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Model 3311 TIA Quad Power Supply—Back
Reset
Resets the internal microcontroller of the Model 3311 Power Supply.
Do not operate the Reset button while communicating with the instrument.
Ethernet
Provides connection to a computer for remote operation using TCP-IP communi-
cations.
USB
Provides connection to a computer for remote operation using RS232 communi-
cations.

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5 Set Up
The Model 3300 Transimpedance Amplier must be used with a correct communica-
tion/power supply unit, either Model 3310 TIA Power Supply or Model 3311 TIA Quad
Power Supply. The Model 3310 TIA Power Supply can only be used with one TIA
unit. The Model 3311 TIA Quad Power Supply can be used with up to four TIA units at
once.
To setup (using either TIA power supply):
1. Plug the supplied 9-pin DIN cable between Amplier Pwr/Com port on the front of
the power supply and the Pwr/Com port on the back of the amplier. Connect up
to four ampliers to the Model 3311 Quad Power Supply if desired.
2. Connect the power supply to a grounded, surge protected AC power source
using the provided AC power cable. Turn the power switch on at the back of the
power supply. The indicator LEDs for the selected gain and multiplier will illumi-
nate on the front of the amplier.
3. Use shielded BNC cables when connecting the TIA input to a photo-detector or
the TIA output to a voltmeter. Connect either the input or output shield to ground
at a single point—avoid multiple ground connections.
4. When possible, use a gain setting that is smaller than the shunt resistance of
the detector. If more amplication is desired, increase the multiplier instead. This
maximizes the amplier linearity and accuracy and has minimal impact on signal-
to-noise ratios compared to increasing the gain in-lieu of the multiplier.
5. If using a Windows based computer to control the amplier and/or record data,
plug the supplied mini USB cable between the USB port on the front of the power
supply and the computer or laptop.
The required USB driver needed to communicate with the TIA unit(s) should auto-
matically install when a Power Supply USB port is connected to a Windows based
computer. If communication through the USB port cannot be established with the TIA
unit(s), it may be necessary to install the USB driver manually from the provided CD.
The provided CD contains a folder labeled FTDI which contains the 32-bit and 64-bit
USB drivers. To install the USB driver manually, open the FTDI folder and run the in-
staller labeled dpinst-x32.exe for 32-bit operating systems or dpinst-x64.exe for 64-bit
operating systems. Once the installer successfully nishes, the correct USB driver for
use with the TIA unit(s) should be installed. In Windows’ Device Manager under the
Ports sub-tree, the TIA should be listed as a “USB Serial Port” followed by the COM
port number being used. If needed, the most recent drivers for the FT232RL can be
found on the “Virtual COM Port Drivers” section of the FTDI Chip website: http://www.
ftdichip.com/Drivers/VCP.htm

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6 Control Software —Single Channel
Demo software is provided as LabVIEW source code. The software is optimized to
be used with a screen resolution of 1920 x 1080. To use the demo software, open the
TIA Single Channel Demo library (.llb le extension) and double click on the Single
Channel Demo vi in the LLB Manager window.
In the Single Channel Demo vi, press the run button to start the software.

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Up to four TIAs with single channel power supplies (Model 3310) can be operated
using the demo software. Select the computer serial ports that the TIAs are connect-
ed to and press the Connect buttons to connect to the TIA units.
When the TIAs are connected through the demo software, the green Connected
lights are lit. Controls for the corresponding number of TIAs connected will open in
the software window. The below screen shows one TIA connected and its corre-
sponding controls.

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The screen below shows four TIAs connected and their corresponding controls.

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Gain/Multiplier:
Use to select the gain and multiplier settings.
Disable LEDs:
Press to turn off the LED lights on the front panel of the TIA. Press again to turn
on the LED lights on the front panel.
Collect Data/Stop Collection:
Press to start or stop data collection.
ADC Rate (Hz):
Use to select ADC rate in Hz. Default is 10 Hz.
Trigger:
Use to synchronize the TIA ADC conversion with an external trigger signal
applied to the sync input on the back of the TIA power supply. Select the trigger
polarity (Falling or Rising), set the delay in milliseconds (range 0-65534 ms), and
then press the Set button. The button will now read ‘Clear’. Press the Collect
Data button and data collection will begin once the trigger signal is detected.
Press the clear button to clear the wait for trigger.
ADC Output (V):
Shows the ADC output in volts in graphical and numeric format. Press the Clear
Chart button if a chart restart is desired.
Data Storage:
File Path:
Default is C:\TIA Data which is created if it does not exist. Press the folder
button to choose a different le path.
File Name:
Cannot be changed. Consists of TIA serial number and date/time code which
is auto generated by software upon pressing Save Data button or Start New
File button.
Sample Period (s):
The number of seconds between recorded data. Default is 1.
Save Data:
Default is off. Turn on to save data in a tab delimited text le.
Start New File:
Press to start recording data to a new text le. File Name will be updated
upon button release.
Serial Number:
Serial number of the TIA unit.
Calibration Date:
Date and time stamp of last factory calibration. Not Cal indicates that the unit has
not been calibrated.
Temp (C):
Temperature in degrees Celsius of the main PCB within the TIA.

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7 Control Software —Four Channel
Demo software is provided as LabVIEW source code. The software is optimized to
be used with a screen resolution of 1920 x 1080. To use the demo software, open
the TIA 4 Channel Demo library (.llb le extension) and double click on the 4 Channel
Demo vi in the LLB Manager window.
In the 4 Channel Demo vi press the run button to start the software.

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Up to four TIAs can be operated with the power supply and demo software using
either TCP or Serial communications. For TCP communications, select TCP using the
Connection Type control and input the IPv4 address of the device in the correspond-
ing eld. For Serial communications select Serial using the Connection Type con-
trol and select the computer serial port the power supply is connected to. Once the
connection parameters have been chosen press the Start Communications button to
connect to the power supply. If successful the red light will illuminate.

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The 4 channel power supply has the capability to detect the presence of any TIAs
connected to it. The software will automatically poll the power supply to determine
if and where any TIAs are connected. If a TIA is connected to any of the ports, the
corresponding controls will enable automatically.
Press the Connect buttons to connect to the TIA units. When the TIAs are connected
through the demo software, the green connected lights are lit. Controls for the cor-
responding number of TIAs connected will open in the software window. The screen
below shows two TIAs connected and their corresponding controls.