Keysight (Agilent) CX1103A Current Sensor, Low Side, 200 MHz

The Keysight CX1103A is a low-side current sensor engineered for high-bandwidth dynamic current measurements in electronic circuits and systems. It delivers 200 MHz measurement bandwidth and captures currents from 100 pA to 20 mA with offset-adjustable transimpedance technology, enabling detection of small AC waveforms superimposed on DC bias currents up to ±20 mA. The sensor’s low-side configuration connects the SMA connector outer conductor to circuit common, minimizing burden voltage through low input resistance and reducing circuit intrusion.

– Technical Specifications

• Bandwidth: Up to 200 MHz standalone
• Dynamic Current Range: 100 pA to 20 mA
• Offset Current Range: Up to ±20 mA
• Input Resistance: 4 Ω typical (50 Ω input OFF); 50 Ω typical (50 Ω input ON)
• Common Mode Voltage Range: ±12 V maximum; ±1 V (50 Ω input ON); ±0.5 V (50 Ω input OFF)
• Minimum Measurable Current: 100 pA level
• Connector Type: SMA
• Dimensions: 46.8 mm (W) × 31.9 mm (H) × 215.3 mm (D)
• Weight: 600 g

– Key Features

• Offset-adjustable transimpedance architecture for DC bias rejection
• Low burden voltage design minimizes circuit loading
• Low-side measurement topology for direct circuit common connection
• Selectable 50 Ω input impedance matching
• Maximum common mode voltage handling to ±12 V

– Typical Applications

• Dynamic current waveform analysis in power electronics
• Power supply transient characterization
• Low-level signal measurement on high DC bias currents
• High-frequency current behavior observation

– Compatibility & Integration

The CX1103A integrates with Keysight CX3300 series Current Waveform Analyzers including the CX3322A and CX3324A mainframes. Standard accessory package includes coaxial adapters, termination head (CX1203A), interconnect cables, and grounding leads.