Analog Devices Inc. EVAL-CN0407-SDPZ Circuit Evaluation Board

Analog Devices Inc. EVAL-CN0407-SDPZ Circuit Evaluation Board helps designers evaluate the CN-0407 Ultra-high Sensitivity Femtoampere Measurement Platform. The EVAL-CN0407-SDPZ from Analog Devices provides a reference design for real-world application by partitioning the system into a low-leakage mezzanine board (EVAL-CN0407-1-SDPZ) and a data acquisition board (EVAL-CN0407-2-SDPZ). The mezzanine board (EVAL-CN0407-1-SDPZ) includes the electrometer-grade ADA4530-1 Amplifier for input signal conditioning. The default amplifier configuration is in the transimpedance mode with a 10GΩ glass resistor and a metal shield that prevents leakage current from entering any of the high impedance paths on the board. Additionally, the mezzanine board includes an unpopulated resistor and capacitor pads to enable prototyping with surface-mount feedback resistors as well as other input configurations. The data acquisition board (EVAL-CN0407-2-SDPZ) features uses an AD7172-2 24-bit Σ-Δ ADC. Powered by a single 9Vdc supply, the onboard supply generates all necessary voltages required to power both boards. The board connects to a PC through the SDP-S board and uses digital isolation to prevent noise from the USB bus or ground loops from degrading low current measurements.