Low-noise preamplifier selection guide
Compact, wide-bandwidth current-to-voltage conversion module
- I/V conversion of high-frequency signals up to 10MHz
- Combines high gain with wide frequency response
![](images/iv_200-1.jpg)
Lineup
Gain (V/A) | Frequency response | Equivalent input noise current density | |
---|---|---|---|
IV-202F4 | 100k | DC to 10MHz | 450fA/√Hz |
IV-204F3 | 4M | DC to 1MHz | 70fA/√Hz |
*The IV-200 series supports customization of the frequency response according to the capacitance of the sensor connected to the input.
Input voltage - Frequency response
Wide measurement range: 1nA to 100µA
![](images/fig_iv200_input-1.jpg)
The IV-204F3 (up to 1MHz) is recommended for input current ranges between 1nA and 100nA, and the IV-202F4 (up to 10MHz) is recommended for currents above 100nA.
Conversion gain - Frequency response
![](images/fig_sa_600_gain.jpg)
*Survey conducted June 16, 2017
Output noise - Frequency response
![](images/fig_sa600_noise_d.jpg)
*Survey conducted June 16, 2017
Pulse response
Output waveform comparison at square wave small signal input
IV-202F4 (DC to 10MHz, 450fA/√Hz) [Input current: 10µAp-p]
![](images/iv_202_f4_100.jpg)
![](images/iv_202_f4_10k.jpg)
![](images/iv_202_f4_1m.jpg)
![](images/iv_202_f4_10m.jpg)
IV-204F3 (DC to 1MHz, 70fA/√Hz) [Input current: 250nAp-p]
![](images/iv_204_f3_100.jpg)
![](images/iv_202_f4_10k-1.jpg)
![](images/iv_204_f3_100k.jpg)
![](images/iv_204_f3_1m.jpg)