PMT Transimpedance Amplifier

  • Transimpedance Amplifier for Photomultiplier Tubes
  • DC to 60 MHz Bandwidth
  • Low Input Current Noise

Application Idea

TIA60 Transimpedance Amplifier Shown Integrated into a Bergamo® II Multiphoton Microscope


Transimpedance Amplifier
Shown with All Included Accessories

Power Cord AdapterBNC to SMA Input CableTrim Pot Adjuster


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Engraved Back of OAP
Click to Enlarge

The TIA60's connections include an SMA input, a 4-pin power socket, and a BNC output.
Engraved Back of OAP
Click to Enlarge

The image above shows how to use the included screwdriver to adjust the DC offset.


  • Transimpedance Gain: 30 200 V/A
  • Large Operation Bandwidth: DC to 60 MHz
  • Low Input Current Noise: 4.8 pA/√Hz @ 1 MHz
  • Designed for Multiphoton and Other Laser Scanning Microscopies
  • Ideal for Hamamatsu H7422, H10720, and H10721 Series PMTs

Thorlabs' TIA60 Transimpedance Amplifier is designed to amplify the output signal from a photomultiplier tube (PMT), PIN photodiode, or other devices that require an amplified current to voltage signal. It offers a large operational bandwidth range from DC to 60 MHz (3 dB) and low noise output (4.8pA/√Hz @ 1 MHz). A trim pot, accessible through a hole in the top of the amplifier (see image to the right), provides a DC offset adjustment to improve the dynamic range of the data collection system.

The TIA60 can be powered by the KPS101 Power Supply Unit (sold below). Internal electronics of the TIA60 regulate the power to the amplification circuitry, isolating the performance of this amplifier from electrical noise that may be inherent to the power source.  

The compact amplifier housing is designed to be mounted close to the detector in order to reduce the noise coupled into the unamplified signal between the detector and the amplifier. It comes with an SMA to BNC adapter, a 4-pin to power jack adapter, and a trim pot adjuster. M3 screws are also included for mounting the amplifier to the Hamamatsu H7422 series PMT.

This amplifier is fully compatible with Hamamatsu's H7422, H10720, and H10721 series PMTs, but the mounting hole pattern will only accommodate the H7422 series. The TIA60 amplifier is also compatible with our biased photodetectors and passive electrical filters.

Specifications Minimum Typical Maximum
AC Performance
Bandwidth (3 dB, Cin = 4 pF)a - 60 MHz -
Rise/Fall Time (10% to 90%) - 5.5 ns -
Settling Time (3%, 0.5 V Output) - 16 ns -
Transfer Characteristics
Total Transimpedance (Combined Stages, DC)b 29 000 V/A 30 200 V/A 32 000 V/A
Transresistance (Input Stage Z-Amp, DC) - 6.04 kΩ -
Linear Input Range, 0 V Bias - - ±50 µA
Maximum Inputc - - ±500 µA
DC Input Impedance - 33 Ω -
Input Reference - 0 V -
Input Current Noise (1 MHz, Cin = 4 pF)a - 4.8 pA/√Hz -
Total Input RMS Noise (DC to 60 MHz)a - 50 nA -
DC Bias (50 Ω Load) -0.15 VDC 0 VDC 1.5 VDC
Output Range (50 Ω Load) -1.5 V - 1.5 V
Impedance (DC to 60 MHz) - 50 Ω -
Return Loss (DC to 60 MHz) 15 dB - -
Slew Rate - 625 V/µs -
DC Performance
Offset Voltage Drift (at Output) - ±103 µV/°C -
Power Supply
Input Voltage 9 V 12 V 15 V
Input Current - 65 mA 100 mA
Operating Temperature 5 °C - 55 °C
Storage Temperature -40 °C - 55 °C
Dimensions (L x W x H) 3.78" x 2.20" x 1.06"
(95.9 mm x 55.9 mm x 26.8 mm)
Weight 100 g
  • Bandwidth and equivalent input current noise are typical values, which depend on the source capacitance. Keep the source capacitance as low as possible by using short cables at the input to achieve best possible bandwidth and noise performance.
  • Positive Gain. Current is considered positive flowing into the amplifier input, and produces a resulting positive output voltage.
  • A significant chance of damaging the amplifier exists if operating above this specification.

The graphs below represent measured data using the KPS101 as the power source. For a file containing the raw data, click here.

Output Voltage Signal

BNC Female

BNC Female

50 Ω Recommended Termination

Input Current SignalSMA Female

Input Power SignalSMA Female

1 +V Input
2 NC
3 NC
4 Ground

Posted Comments:
user  (posted 2021-03-17 11:38:49.78)
Hallo, I am planing to use the PMT H10721 with the TIA60. My laser source has repetition rate which can vary between 100 kHz and 4.5 MHz, each laser pulse is 50 fs long. The rise time of the PMT H10721 is 0.57 ns. - Assuming the PMT provides an output current signal 2 ns long, is the bandwidth of the TIA60 sufficient to amplify the current with a conversion factor of about 30000 V/A ? - what is the expected voltage pulse duration coming out of the TIA60 ? Thanks a lot and best regards, Giuseppe Mercurio
asundararaj  (posted 2021-04-01 02:12:44.0)
Thank you for contacting Thorlabs. The TIA60 has a bandwidth of 60 MHz and a rise and fall time of 5.5 ns. This would not be a suitable amplifier for applications with a shorter pulse. We typically recommend that the rise time of the detection system should be 10x larger than the pulse width to fully resolve the pulse.
Andrea Papi  (posted 2020-10-10 09:26:18.267)
Hi, we at Italian National Institute of Nuclear Physiscs in Perugia Italy, are trying to develop a Low Light Leak System for a RICH detector on a CERN HEP Experiment. We have to use PMT from Hamamatsu R7400U for low leak light detection in a Dark Box where are the Photon Counting PMT for the RICH detector. If there is a low light leak in the box we have to turn off the HV Bias of the detectors to protect the Photon Counting System. The signal from the PMT come form 100 meters of RG58 cable (10nF Cable) with BNC connectors, we need to read the Photocurrent and convert this current in a linear voltage. Now the low light rate is 1.3Mhz and the High light rate (photons) is 18Mhz, prom PMT pulse, we have to place the alarm threshold near 15Mhz. The counting rate is quite high and the PMT pulses will overlap each other and produce a continuous current (Photocurrent) and may be an hybrid solution between an CSA and TIA could be the best circuit. The costant time of the CF and RF should be more than 10 times the T of the maximun pulse PMT frequency 18Mhz (I mean 500ns). We need at maximun 20 sensors and conditioning circuts for the 20 dark box of the experiment then the solution with custom design for bipolar pulse shaping to photon_counting is non feasible. We want to use a TIA System to convert current in voltage coupled in DC then we send the output buffered to a comparator and set two alarm signals one is TTL and the other is LVDS signals to turn off the HV Bias of the PMT. We'd like to know if your TIA60 can fits our need for prorotype and also to Know the cost, we will have 15 PMT R7400U to monitor 15 dark box each containing 64 multianode PMT to protect. We will need also the schematic of the TIA60 to konw the tau of the TIA expecially if the long 100 meters of RG58 cable at the input can create problem to your instruments. We wait your hints and tips for our assumptions. Thank you. Kind regards. Andrea Papi. Perugia Italy INFN. 075 5852754
asundararaj  (posted 2020-10-22 09:04:53.0)
Thank you for contacting Thorlabs. We have contacted you directly to discuss this further.
CHEOL HONG MIN  (posted 2019-10-02 13:52:58.203)
Hi, I need technical support for the overturned image or signals from TIA60 with H7422-40 PMT. I've already purchased the TIA60 and KPS101 and connected them to Olympus FV500 DAQ ports on my computer and than received the light and made the fluorescent bead images by using flouview (olympus) program while the con-focal scanning is accomplished. But I just observed the image which was consisted of black color in area of fluorescent beads. I think that it is caused by opposite signal from the TIA60. How can I figure it out? Should I use the converter (amp) for that?
asundararaj  (posted 2019-10-04 02:08:49.0)
Thank you for contacting Thorlabs. If you are observing a negative signal such that when there is light, there is no signal and vice versa, can you please verify if the connections on the DAQ are proper and not inverted? If this checks out, this can mean that the output of the PMT is opposite. In this case, you will have to have a signal inverter in between the PMT and the TIA. I have reached out to you directly to discuss this further.
yingshun xu  (posted 2019-05-18 15:08:46.383)
Hi, I need technical support. I have one TIA60 but it doesnot work now. Do you have any simple test methods to verify its functions? Thank you! Best regards, yingshun
YLohia  (posted 2019-06-13 08:51:15.0)
Hello Yingshun, thank you for contacting Thorlabs. How are you using it and testing it right now? One way to test would be to input a very small current into the IN port using an SMA cable and measuring on the oscilloscope with the BNC out. Do you see any response? What load resistance are you using on your oscilloscope? We reached out to you at the time of your original post to troubleshoot this further.
stephane.pages  (posted 2018-09-12 14:32:57.35)
Hi, I would like to use the TIA60 with a Hamamatsu H10770PA-40 PMT. Is it compatible ? Thanks,
llamb  (posted 2018-09-20 03:27:03.0)
Thank you for contacting Thorlabs. The H10770PA-40 is the PMT we use in our PMT2101 and its amplifier board is very similar to our TIA60, so yes this combination should work.
paulg  (posted 2018-02-24 14:38:29.02)
Hi, we want to also know the frequency response below 100 kHz (to 10 kHz). Can you please provide this too? Thank you!
nbayconich  (posted 2018-03-15 10:58:47.0)
Thank you for contacting Thorlabs. The response is essentially flat across the frequency range of 10kHz to 100khz. The frequency response, 3dB bandwidth and noise floor can slightly change when using different connection cable lengths. I will reach out to you directly with test data regarding the frequency response.
jugon.shin  (posted 2018-02-05 23:42:51.883)
Dear THORLABS. Hi, we are using the TIA60 with PMTss, also we are using the KPS101 as a power supplier for TIA60. Now, we adjusted a initial signal position at the 0.01V using by a Trim Pot Adjuster, then the output voltage was going down from 0.01V to 0.005V, when light source was detected. We would like to ask about the output signal we got. Could we use the TIA60 right way? and Could we get the manual about TIA60?
tfrisch  (posted 2018-02-06 09:39:55.0)
Hello, thank you for contacting Thorlabs. KPS101 is the recommend power supply unit for TIA60. The manual is available below through the Docs icon, but I will also reach out to you directly about the set up and using the TIA60 with the PMTSS.
joseph.raimondo  (posted 2017-12-11 18:50:49.753)
Hi, we are attempting to use the TIA60 together with a Hamamatsu H10770PA-40 PMT, is this trans-impedence amplifier compatible the PMT as we are struggling to get it working? Many thanks, Joseph
tfrisch  (posted 2017-12-27 04:37:28.0)
Hello, Joseph. Thank you for contacting Thorlabs. While I don't have a Hamamatsu H10770PA-40 on hand to test, I see that the max output current is about 2uA, only a little less than PMTSS. I will reach out to you directly to troubleshoot.
johanna.tragardh  (posted 2016-05-23 16:27:50.757)
We are using the TIA60 together with the Thorlabs PMTSS PMT. (We are connecting the PMT to the amplifier with the supplied BNC to SMA cable and driving them from the same 15V source.) It seems that this combination results in an excessive noise level. Already at very low PMT gain and light levels the amplifier is completely saturated and/or there is excessive number of voltage spikes in the signal. (We have tested the PMT and TIA60 separately and they function as expected). Is there a problem specific to this amplifier/PMT combination?
besembeson  (posted 2016-05-25 10:23:06.0)
Response from Bweh at Thorlabs USA: You can in principle use these together as the KPS101 that is used for the TIA60 should have enough power if proper wiring is done, which may not be the case with your setup now. We can actually provide a special version of the PMTSS with the amplifier and power supply integrated that should give you the desired performance. Or you may test using a separate power supply for the PMTSS. I will follow-up with you.
bernd.polder  (posted 2015-11-23 16:21:53.97)
Dear Ladies and Gentlemen, I am looking for a transimpedance amplifier with a large operating temperature range. Could you please give me further information about the thermal behaviour of the TIA60? Thank you very much With best regards Bernd Polder Inertial Sensors MEMS Technologies Sensor Business Group TDK-EPC AG & Co. KG A TDK Group Company Beeskowdamm 3- 11 14167 Berlin Telephone: +49 30 890 4055 5345 Fax: +49 3329 6068 15 mailto: · Headquarters: Berlin ∙ Commercial register of the local court (Amtsgericht): Charlottenburg ∙ HRA 28220 B General Partner: EPCOS AG Headquarters: Munich ∙ Commercial register of the local court (Amtsgericht): Munich ∙ HRB 127250 Chairman of the Supervisory Board: Dr. Werner Faber Management Board: Joachim Zichlarz, Chairman ∙ Joachim Thiele · Dr. Norbert Hess · Christian Block
besembeson  (posted 2015-11-25 02:19:43.0)
Response from Bweh at Thorlabs USA: Our Germany division will provide this to you via email.
daniel.o-connor  (posted 2015-04-29 16:53:23.86)
I have a number of biased Si photodiodes e.g. DET100A DET10A and was wondering on the compatibility of this amplifier (TIA60) with them to boost their output when observing low power beams and scatterred light that is modulated at high frequency (close to MHz). I am aware of the PDA200C for photodiodes but I wish to sample beyond 1 MHz if possible to avoid undersampling the signals.
jlow  (posted 2015-04-29 03:40:00.0)
Response from Jeremy at Thorlabs: The TIA60 can be used with the DET series detector. Please make sure the cable between them is as short as possible (one short SMA to BNC cable is included with the TIA60).

Transimpedance Amplifier

Please note that the TIA60 does not ship with a power supply. A compatible power supply is our KPS101, sold below.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
TIA60 Support Documentation
TIA60PMT Transimpedance Amplifier

Transimpedance Amplifier Power Supply

  • Power Supply Compatible with TIA60
  • Universal Input: 90 - 264 VAC
  • Interchangeable AC Plug

The KPS101 Power Supply Unit supports a single TIA60 Transimpedance Amplifier. It is connected to the TIA60 using the 4-pin to power jack adapter that is included with the TIA60. A location-specific adapter plug is shipped with the KPS101 based on your location.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
KPS101 Support Documentation
KPS10115 V, 2.4 A Power Supply Unit with 3.5 mm Jack Connector for One K- or T-Cube