Agilent/Keysight CX1101A

The Keysight CX1101A is a single-channel current sensor accessory for the CX3300 Series Device Current Waveform Analyzers, engineered to measure low-level current waveforms with high precision. It delivers a measurement range from 40 nA to 1 A (extendable to 10 A with the CX1206A High Current Sensor Head) and supports a maximum stand-alone bandwidth of 100 MHz. The sensor employs wideband noise-suppressed current measurement technology with a typical input resistance of 410 mΩ, enabling detection of subtle current variations critical in R&D and manufacturing environments.

Common-mode voltage capability reaches ±40 V peak (DC + AC), with AC limited to ±5 V above 1 MHz.

Technical Specifications

• Measurement range: 40 nA to 1 A (standard); up to 10 A with CX1206A High Current Sensor Head


• Bandwidth: 100 MHz maximum (stand-alone); effective bandwidth influenced by accessory and CX3300 mainframe


• Common-mode voltage range: ±40 V peak (DC + AC); ±5 V AC above 1 MHz


• Input resistance: 410 mΩ typical; 50 Ω typical (configuration-dependent)


• Input common-mode impedance: 750 MΩ // 31 pF (nominal)


• Burden voltage: R_IN × measured current


• Rise time (10% to 90%): 0.35 ns


• Measurable over range: 10% of selected range


• Dimensions: 46.8 mm (W) × 31.9 mm (H)

Key Features

• Wideband noise-suppressed measurement technology for low-current accuracy


• Includes CX1203A Coaxial Termination Sensor Head with cables


• Wide measurement dynamic range spanning three decades (40 nA to 1 A)


• Expandable to 10 A via optional CX1206A sensor head


• Minus terminal internally connected to circuit common through 10 MΩ resistor (CX1203A configuration)


• Low input resistance minimizes circuit loading

Typical Applications

• IoT device development - analyzing current consumption during sleep, standby, and active states


• Low-power mode transition debugging


• Device current waveform analysis in research and manufacturing

Compatibility & Integration

• Operates exclusively with Keysight CX3300 Series mainframes (CX3300A, CX3322A, CX3324A)


• Compatible sensor heads: CX1203A (furnished), CX1206A, CX1201A, CX1202A, CX1204A, CX1205A, CX1214A, CX1215A, CX1216A


• Sensor head selection affects bandwidth and measurement characteristics