The Keysight (Agilent) N5425A is a 12 GHz differential ZIF probe head engineered for precision high-speed signal measurement in advanced circuit designs. It delivers flat frequency response extending beyond 12 GHz while maintaining low input loading through its 50 kΩ differential input resistance and 0.33 pF differential input capacitance. The Zero Insertion Force (ZIF) tip design enables reliable contact on densely populated PCBs and ICs without requiring high insertion pressure—critical when physical access is constrained.
Technical Specifications
• Bandwidth: >12 GHz typical
• Differential Input Resistance: 50 kΩ
• Differential Input Capacitance: 0.33 pF
• Single-Ended Input Resistance: 25 kΩ
• Single-Ended Input Capacitance: 0.53 pF
• Frequency Response: Flat to >12 GHz
– Key Features
• Zero Insertion Force (ZIF) tip design eliminates high contact pressure during deployment
• Differential input impedance of 50 kΩ reduces signal loading on circuits under test
• Interchangeable ZIF tip options optimize bandwidth and physical reach for specific measurement scenarios
• InfiniiMax interface with AutoProbe 2 compatibility enables automatic probe configuration, attenuation, power delivery, and offset settings
– Typical Applications
• High-frequency digital interface characterization
• Advanced semiconductor signal analysis
• Differential signal acquisition on densely packed boards where probe access is limited
• Multi-point signal monitoring with InfiniiMax probe amplifier systems
– Compatibility & Integration
The N5425A operates with Keysight InfiniiMax Ultra, InfiniiMax RC, and InfiniiMax II probe amplifiers (N2830/1/2A, N2800/1/2/3A, 1130/1/2/4B, 1168B, and 1169B models). Three ZIF tip options are available separately: the N5426A standard tip (12 GHz with 1169B), the N2884A fine-wire tip (12 GHz with 1169B), and the N5451A long-wire tip (9 GHz at 7 mm or 5 GHz at 11 mm). Bandwidth performance varies based on selected amplifier and tip configuration.
