PXI-4022

6-Wire Guard and Current Amplifier NI PXI-4022 NEW! • High-speed, high-precision guard and current amplifier • Applications • 6-wire guarded measurements • Low-current measurements • Used as an accessory to NI PXI-407x digital multimeters and M Series data acquisition devices • ±200 µV guard accuracy, typical • 1 ±0.0005% DC gain Operating Systems • Windows 2000/NT/XP • Linux Recommended Software • LabVIEW Driver Software (included) • NI-DMM Overview The National Instruments PXI-4022 guard and current amplifier is a PXI accessory module consisting of a high-speed, high-precision amplifier that conditions signals for measurement devices. With the guarding functionality, you can make 6-wire resistance measurements for resistors connected in a network, on complex printed circuit board layouts, or cable test applications. For low-current measurements, the NI PXI-4022 amplifier and high-precision resistors create a feedback current amplifier. This implementation minimizes burden voltages and converts current to voltage, so you can measure pA signals with fA noise. Guard Output LO Guard Input+ LO Guard Inputñ Blue Black + Red Black Red - PXI-4022 Guard Mode Amplifier Output LO Bias Voltage Current Blue Black + Red Black Red 100 M Add Functionality to DMMs and Data Acquisition Devices You can use the PXI-4022 with NI PXI-407x digital multimeters (DMMs) for 6-wire resistance/capacitance measurements or ultralow-current measurements in a wide variety of applications. You also can use it with an M Series data acquisition device to form a low-cost, high-resolution acquisition module for basic in-circuit test needs. Current 1M 10 k PXI-4022 Current Amplifier Mode Software The PXI-4022 is shipped with NI-DMM driver software, an IVI-compliant driver that provides numerous example programs and access to the complete functionality of the PXI-4022 through an easy-to-use application programming interface (API). Ordering Information NI PXI-4022............................................................................779614-01 Includes NI-DMM software. Low-leakage, low thermal cable set ....................................779410-01 Low-leakage, low thermal connectivity set..........................779499-01 BUY NOW! For complete product specifications, pricing, and accessory information, call (800) 813 3693 (U.S.) or go to ni.com/multimeters. 6-Wire Guard and Current Amplifier Specifications Guard Amplifier Input-output offset................................................................. Gain ....................................................................................... Slew rate................................................................................ Bandwidth.............................................................................. ±200 µV typical; ±500 µV max 1 ±0.0005% at DC 40 V/µS minimum 1 MHz typical minimum Current Amplifier Gain Setting V/A (Range) 108 (100 nA) 106 (10 µA) 104 (1 mA) 1Recommended Accuracy1 23 °C ± 5 °C 0.7% ± 5 pA 0.5% ± 0.5 nA 0.5% ± 50 nA Usable Sensitivity2 0.5 pA 50 pA 5 nA Settling Time3 100 ms 33 ms 1 ms Burden Voltage (max) 20 µV 2 mV 200 mV Tempco/°C (0 to 55 °C) 0.01% + 0.2 pA 0.005% + 2 pA 0.005% + 200 pA for laboratory enviornments, 0 to 35 °C up to 60% relative humidity. 210 Hz bandwidth 310 to 90%, 3 dB bandwidth = 0.5/settling time Input Characteristics Input impedance .................................................................... >1010 Ω Input bias current...................................................................