• Transimpedance Amplifier Board
  • Transimpedance Amplifier Board
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Transimpedance Amplifier Board

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  • Price

    Price on request   ≥1piece

  • Model Number

    Digiboard

  • Data Sheet

  • Package

    Original packaging

  • Specs

    Digiboard

  • Quantity

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Product Description

Digiboard Transimpedance Amplifier Board Description
Most applications of photodiodes and especially those in the ultraviolet wavelength range require special  amplifiers  because  of  the  small photocurrents. Although the uv-sensors of sglux provide large active areas you mostly may consider using an amplifier.

To support your application development we provide you this completely new photodiode amplifier board. Based on our successful Multifunctional 2-Channel Amplifier Board we included additional features: one analog channel with adjustable Schmitt-Trigger (ST) and a Current-to-Frequency converter (CFC) channel.

The CFC clearly simplifies the integration of our photodiodes into digital- and microprocessor based designs.

Digiboard Transimpedance Amplifier Board Features
•  wide single supply voltage range 5.0 V … 18.0 V with surge and polarity protection
•  low power consumption ( < 50 mW @ 5 V )
•  analog transimpedance amplifier channel with:
   adjustable gain in the range 10 5 … 10 7 V/A with fine tuning option
   Schmitt-Trigger stage with adjustable switching point and adjustable Hysteresis
   LED for easy adjustment of the Schmitt-Trigger
•  Current-to-Frequency converter with:
   2 measurement ranges giving high dynamic range
   standard CMOS compatible digital output

Important Notice
Please consider any possible action to protect the sensitive devices on the board against electrostatic discharge (ESD). Not to do so voids warranty.

Digiboard Transimpedance Amplifier Board Absolute Maximum Ratings
Exceeding these limits may decrease lifetime or destroy the board or parts of it immediately.
Parameter
 Unit
 Value
Operation Temperature range * °C
 0 … +70
Storage Temperature range *
 °C
 -25 … +85
Supply voltage
 V
 +18.5
Output current (digital output)
 mA
 0.5
Output current (analog output)
 mA
 10
*in non condensing environment only

Digiboard Transimpedance Amplifier Board Electrical Characteristics 
(at 25°C unless otherwise noted, default jumper settings)
General
Parameter
 Unit
 Value
min
 typ
 max
Supply voltage
 V
 5 12 18
Power dissipation
(at 5 V supply voltage, depends on load and switching frequency)
 mW
50

Analog channel
Parameter
 Unit
 Value
min
 typ
 max
Fixed transimpedance gain  (gain setting by switches 3,4,5)



    low
 V/A
 0.98 x 105
 105
 1.02 x 105
    medium
 0.98 x 106
 106
 1.02 x 106
    high
 0.90 x 107
 107
 1.10 x 107
Variable transimpedance gain factor range*
0.7 - 1.3
 0.5 - 1.5
 0.3 - 1.7
Input current
 A

□ 30 x 10-6
Maximum output voltage
(in both polarities)
 V
 □ 2.6 □ 2.9 □ 3.3
Output offset voltage
(with optimal compensation)
 mV
< □ 5
 □ 10
* if fine tuning selected by closing switches 6 and 7 total gain derived by multiplying fixed gain with variable gain factor

Digital channel
Parameter
 Unit
 Value
min
 typ
 max
Output voltage LOW*
 V
 0 0.05 0.1
Output voltage HIGH*
 V
 2.8 3.1 3.3
Frequency output pulse length FWHM
(levels above)
 µs
 1 1.2 2
Input current 
 A
 ~ 10-10
~ 10-4
Conversion rate



   low frequency mode
 Hz / A
 2.8 x 108
 3.0 x 108 3.2 x 108
   high frequency mode
 3.1 109
 3.3 x 109 3.5 x 109
Conversion rate temperature dependance
 1 / K
□3 x 10-5
Linearity error, high frequency mode



   @ 10 kHz
 %
1
   @ 40 kHz
5.2
   @ 100 kHz
12
Linearity error, low frequency mode



   @ 10 kHz
 %
1
   @ 40 kHz
5.5
   @ 100 kHz
13
* for the frequency output as well as for the Schmitt-Trigger output