Newtons4th Ltd [email protected] www.newtons4th.com Transimpedance Amplifier TA107 Accessory for use with the PSM1700 or PSM1735 Frequency Response Analyzers for high impedance measurement. APPLICATION The PSM range from N4L provide impedance measurement either with passive shunts or with external accessories that offer an accurate and flexible solution to many impedance analysis applications. Accessories include the ‘LCR Active Head’ or ‘Impedance Analysis Interface’ that give a convenient measurement solution to general purpose LCR applications from 10uHz to 35MHz and an impedance range of 1mOhm to 500MOhm. Above 500MOhm, the measurement techniques utilized within the ‘LCR Active Head’ or ‘IAI’ are not ideal, due partly to the exceptionally low current associated with high impedance analysis and also the parasitic capacitance of the connection leads to a sample under test. SOLUTION A recognized measurement technique for high impedance analysis applications is to measure the current flowing through a component or material under test with a transimpedance amplifier. N4L have therefore developed the TA107 for use with the PSM1700 or PSM1735, significantly increasing the maximum impedance measurement range. OPERATION The TA107 uses a virtual earth connection from a sample holder as shown above (not supplied standard). SPECIFICATION (When used with a PSM1735) Impedance range: Frequency range: Input current range: Input connector: Dimensions: Input power: Using PSM generator output 1M Ohm to 100G Ohm Using PSM + LPA400 Amplifier 10M Ohm to 1T Ohm DC to 100kHz Nominal Gain: 107 volts per amp 5pA to 500nA Max output voltage: 5Vpk BNC Output connector: BNC 130 x 90 x 45 mm Weight: 400 g 9V ac adaptor supplied standard or ± 12V dc (Aux o/p on PSM1735) Newtons4th Ltd 30 Loughborough Rd Mountsorrel Loughborough LE12 7AT UK Tel +44 (0)116 2301066