Low Noise I to V Converter
The external page Electronics Lab of the Department of Physics in Basel presents a Low Noise / High Stability I to V Converter (SP 983) that combines low input voltage noise with high stability and low drift input voltage. This combination is important for measurements on samples at temperatures near the absolute zero. Commercial available I/V converters suffer from higher voltage noise or lower input voltage stability over temperature.
We can equip the device with two different J-FETs in the input stage:
1) STANDARD: LSK389A
PRO: Lower input current noise; significant in the 1E8 and 1E9 V/A ranges
CON: Slightly higher input voltage noise / Smaller gain-bandwidth-product (68 MHz) = more sensitive to large input-capacitances
Data sheet: Download STANDARD: LSK389A (PDF, 1.7 MB)
2) HIGH-GBWP: IF3602
PRO: Slightly lower input voltage noise / Lager gain-bandwidth-product (620 MHz) = less sensitive to large input-capacitances
CON: Higher input current noise; significant in the 1E8 and 1E9 V/A ranges (1E9 V/A almost factor 2 higher than LSK389A)
Data sheet: Download HIGH-GBWP: IF3602 (PDF, 1.7 MB)
Available from the Uni Basel spin-off Basel Precision Instruments GmbH
QSIT members can ask about the QSIT discount.