Keysight E4990A Impedance Analyzer
A precision impedance analyzer designed for accurate characterization of electronic components and materials. It covers a wide frequency range (20 Hz to 120 MHz) with exceptional accuracy, ideal for evaluating capacitors, inductors, and dielectric materials.
System Capabilities
The Keysight E4990A provides industry-leading accuracy (typical ±0.045%) for impedance measurements over a vast frequency range. It features built-in DC bias capability (voltage and current modes) to characterize devices under realistic operating conditions.
With its 10.4-inch touchscreen and multi-channel trace display, users can perform real-time equivalent circuit analysis to extract R, L, C, and Q parameters for simulation and design verification.
Operating Modes
LCR Sweep
Sweeps Z, R, L, C, D, and Q against frequency to characterize component behavior across the spectrum.
DC Bias Sweep
Measures impedance variations vs. DC voltage or current to evaluate bias-dependent materials.
Equivalent Circuit
Automatically fits measurement data to R-L-C network models for parameter extraction.
Limit Line Test
Pass/Fail testing with user-defined limits per frequency point for production quality assurance.
Technical Specifications
| Frequency Range | 20 Hz to 120 MHz |
|---|---|
| Basic Accuracy | ± 0.08% (Typical ± 0.045%) |
| Impedance Range | 25 mΩ to 40 MΩ (10% Accuracy Range) |
| Measurement Parameters | |Z|, |Y|, θ, R, X, G, B, L, C, D, Q |
| DC Bias Source | 0 to ±40 V, 0 to ±100 mA |
| Interface | 10.4" Touchscreen, GPIB/LAN/USB |
Comparison: Impedance Analyzer vs. LCR Meter
Comparing the E4990A Analyzer against a standard benchtop LCR Meter.
| Feature | E4990A Analyzer | Standard LCR Meter |
|---|---|---|
| Frequency Sweep | Continuous (Sweep) | Discrete Points (Fixed) |
| Analysis | Graphical (Plots & Trends) | Numerical (Single Value) |
| Bandwidth | Wide (20 Hz - 120 MHz) | Limited (typ. < 1 MHz) |
| Application | R&D / Characterization | Quick Sorting / QC |