Transimpedance Amplifiers

A transimpedance amplifier (TIA) is a current to voltage converter which is used to amplify the current output from different types of sensors to a proportional voltage. Transimpedance amplifiers are used with sensors which have a current response that is more linear than the voltage response.
Transimpedance amplifiers are also referred to as current to voltage converters or I to V converters.

Passive or Active?

• Passive current to voltage converters uses only passive elements. There are however limitations with these types of amplifiers as the current source and output load must be ideal for proper operation. The output load resistance must be close to infinity, current from the current source must be independent of the voltage and the current source must have infinite internal resistance. As these conditions are virtually impossible to attain, passive current to voltage converters is rarely used.
• Active current to voltage converters is based on active elements like a bipolar junction transistor (BJT), field effect transistor (FET) or an operational amplifier (opamp). The most common combination is using a transimpedance amplifier with an operational amplifier.

What are the typical applications of the transimpedance amplifier?
There are a lot of possible applications for transimpedance amplifiers due to the amount of day to day electronics we use. A transimpedance amplifier allows for more advanced circuitry such as servomechanisms and light meters.

What is a accuracy of transimpedance amplifier?

The accuracy may depend on many aspects of the signal such as its condition, hysteresis or linearity. Also, the working temperature and environmental conditions have an impact on accuracy. This can be improved by using additional circuit integrated elements e.g. noise filters.

What are the most important specifications of TIA?

Before making a decision os one TIA or another, you should consider a few most important values e.g:

• bandwidth
• noise
• signal bandwidth
• gain
• capacitance

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Description Price Power Supply Type Typical Single Supply Voltage Typical Dual Supply Voltage Number of Channels per Chip Typical Slew Rate Output Type Typical Gain Bandwidth Product Mounting Type Package Type Pin Count Dimensions Height Length Maximum Operating Temperature
RS Stock No. 661-2498
Mfr. Part No.OPA380AID
$6.48
Each
units
Single 3 V, 5 V - 1 80V/µs - 90MHz Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 1.58mm 4.9mm +125 °C
RS Stock No. 709-5049
Mfr. Part No.AD8015ARZ
$12.34
Each
units
Dual, Single 5 V ±2.5V 1 - Differential - Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm +85 °C
RS Stock No. 912-6612
Mfr. Part No.AD8015ARZ
$8.885
Each (In a Tube of 98)
units
Dual, Single 5 V ±2.5V 1 - Differential - Surface Mount SOIC 8 5 x 4 x 1.5mm 1.5mm 5mm +85 °C
RS Stock No. 660-9852
Mfr. Part No.OPA381AIDGKT
$2.79
Each
units
Single 3 V, 5 V - 1 12V/µs - 18MHz Surface Mount MSOP 8 3 x 3 x 0.97mm 0.97mm 3mm +125 °C
RS Stock No. 162-5448
Mfr. Part No.OPA381AIDGKT
$2.023
Each (On a Reel of 250)
units
Single 3 V, 5 V - 1 12V/µs - 18MHz Surface Mount MSOP 8 3 x 3 x 0.97mm 0.97mm 3mm +125 °C
RS Stock No. 162-5447
Mfr. Part No.OPA380AIDGKT
$5.14
Each (On a Reel of 250)
units
Single 3 V, 5 V - 1 - - 90MHz Surface Mount MSOP 8 3 x 3 x 0.97mm 0.97mm 3mm +125 °C
RS Stock No. 660-6626
Mfr. Part No.RCV420JP
$13.82
Each
units
- 11.4 → 36 V - - 1.5V/µs - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm +85 °C
RS Stock No. 661-2422
Mfr. Part No.OPA380AIDGKT
$7.44
Each
units
Single 3 V, 5 V - 1 - - 90MHz Surface Mount MSOP 8 3 x 3 x 0.97mm 0.97mm 3mm +125 °C
RS Stock No. 923-3675
Mfr. Part No.RCV420JP
$9.234
Each (In a Tube of 25)
units
- 11.4 → 36 V - - 1.5V/µs - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm +85 °C
RS Stock No. 660-4273
Mfr. Part No.IVC102U
$16.24
Each
units
Dual - ±15V 1 3V/µs - 2MHz Surface Mount SOIC 14 8.65 x 3.91 x 1.58mm 1.58mm 8.65mm +85 °C
RS Stock No. 102-5659
Mfr. Part No.IVC102U
$12.411
Each (In a Tube of 50)
units
Dual - ±15V 1 3V/µs - 2MHz Surface Mount SOIC 14 8.65 x 3.91 x 1.58mm 1.58mm 8.65mm +85 °C
RS Stock No. 162-5196
Mfr. Part No.OPA2381AIDGKT
$3.031
Each (On a Reel of 250)
units
Single 3 V, 5 V - 2 12V/µs - 18MHz Surface Mount MSOP 8 3 x 3 x 0.97mm 0.97mm 3mm +125 °C
RS Stock No. 660-4314
Mfr. Part No.OPA2381AIDGKT
$4.38
Each
units
Single 3 V, 5 V - 2 12V/µs - 18MHz Surface Mount MSOP 8 3 x 3 x 0.97mm 0.97mm 3mm +125 °C
RS Stock No. 661-2410
Mfr. Part No.OPA2380AIDGKT
$8.39
Each
units
Single 3 V, 5 V - 2 - - 90MHz Surface Mount MSOP 8 3 x 3 x 0.97mm 0.97mm 3mm +125 °C