Agilent/Keysight CX1211A

The CX1211A is a resistive sensor head designed for integration with Keysight CX3300 series Device Current Waveform Analyzers. This sensor head enables precision measurement of medium-level currents across power rail characterization, power integrity analysis, and dynamic device behavior testing. The CX1211A delivers the impedance and current rating required for detailed waveform capture in demanding test environments.

Technical Specifications

• Current range: 0–15 A


• Sensor resistance: 5.5 mΩ


• Designed for use with CX3300 series mainframes operating at up to 1 GSa/s digitization rate


• Supports bandwidth up to 200 MHz in the CX3300 analyzer framework


• Compatible with 14-bit and 16-bit dynamic range configurations

Key Features

• Resistive measurement topology for low thermal drift and stable DC characteristics


• Direct integration with CX3300 series 2-channel and 4-channel configurations


• Part of a modular sensor family covering current ranges from 0.25 A to 15 A


• Enables capture of fast transient waveforms in device under test (DUT) applications

Typical Applications

• Power rail current profiling during device startup and steady-state operation


• Power integrity and PDN characterization on integrated circuits


• Dynamic current analysis of switching regulators and power converters


• Device current waveform capture for power consumption analysis


• Transient current measurement when paired with pulse generation accessories

Compatibility & Integration The CX1211A mounts directly into CX3300 series Device Current Waveform Analyzer slots. It works alongside other Keysight current sensors - including the CX1101A (40 nA–1 A), CX1104A (1 μA–15 A), and CX1103A - to form multi-channel measurement systems. Voltage measurement capability is available through the CX1151A Passive Probe Interface Adapter. For transient testing, the CX1201A Coaxial Through enables pulse generator integration with current measurement.