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4155C Datasheet(PDF) 7 Page - Agilent(Hewlett-Packard) |
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4155C Datasheet(HTML) 7 Page - Agilent(Hewlett-Packard) |
7 / 14 page 7 Sampling (Time Domain) Measurement Characteristics Displays the time sampled voltage/current data versus time. Max. sampling points: 10,001 (linear) Sampling mode: linear, log, and thinned-out Note: The thinned-out mode is similar to reverse-log sampling. Sampling measurement continues by thin- ning out older data until the sampling completion condition is satisfied. Sampling interval range and resolution: Linear scale (auto mode): 60 μs to 480 μs range: 20 μs resolution 480 μs to 1 s range: 80 μs resolution 1 s to 65.535 s range: 2 ms resolution Linear scale (no limit mode), log scale, and thinned-out modes: 560 μs (720 μs at thinned-out mode) to 1 s range: 80 μs resolution 1 s to 65.535 s range: 2 ms resolution Note: The following conditions must be set when initial interval is less than 2 ms. • Number of measurement channels: 1 • Measurement ranging: fixed range • Stop condition: disable Hold time: Initial wait time: 0.03 s to 655.35 s, 100 μs resolution Sampling measurement stop condition: A condition to stop the sampling can be defined. Sampling interval setting accuracy (supplemental data): 0.5% + 10 μs (sampling interval ≤480 μs) 0.5% + 10 μs (480 μs ≤sampling interval <2 ms) 0.5% + 100 μs (2 ms ≤sampling interval) C-V Measurement Characteristics Capacitance is a calculated value derived from the following equation: DQ C = ——— DV DQ is the change in charge when DV, the step voltage, is applied by the SMU; DQ is derived from the measurement current (amps) and the integration time (seconds). Maximum Measurable Value Maximum measurable value depends on the current range, integration time, and step voltage (refer to the chart in supple- mental data). Capacitance Calculation Accuracy Accuracy is dependent on accuracy of the current measurement and voltage measurement and the stray capacitance and leakage current of measurement path, etc. (Refer to the chart in supplemental data). Zero Offset Cancels stray capacitance of the fixtures and test leads. Leakage Current Compensation Cancels the influence of the leakage current to the capacitance measurement. Stress Force Characteristics SMU, VSU, and PGU output can be forced for the user specified period. Stress time set range: 500 μs to 31,536,000 s (365 days) Resolution: 100 μs (500 μs ≤stress time ≤10 s) 10 ms (10 s <stress time ≤31,536,000 s) Burst pulse count: 1–65,535 (PGU only) Trigger: The 4155C and 4156C output a gate trigger while stress channels are forcing stress. Knob Sweep In knob sweep mode, sweep range is controlled instantaneously with the front-panel rotary knob. Only the Channel Definition page need be defined. Standby Mode SMUs in “Standby” remain programmed to their specified output value even as other units are reset for the next measurement. Other Characteristics Measurement Control: Single, append, repeat, and stop Stress Control: Stress force and stop SMU Setting Capabilities: Limited autoranging, voltage/current compli- ance, power compliance, automatic sweep abort functions, self-test, and self-calibration. Arithmetic and Analysis Functions Arithmetic Functions User Functions Up to six USER FUNCTIONS can be defined using arithmetic expressions. Measured data and analyzed variables from graphics analysis (marker, cursor, and line data) can be used in the computation. The results can be displayed on the LCD. Arithmetic Operators +, -, *, /, ^, LGT (logarithm, base 10), LOG (logarithm, base e), EXP (exponent), DELTA, DIFF (differential), INTEG (integra- tion), MAVG (moving average), SQRT, ABS (absolute value), MAX, MIN, AVG (averaging), COND (conditional evaluation). Physical Constants Keyboard constants are stored in memory as follows: q: Electron Charge, 1.602177 E-19 C k: Boltzman’s Constant, 1.380658 E-23 ε (e): Dielectric Constant of Vacuum, 8.854188 E-12 Engineering Units The following unit symbols are also avail- able on the keyboard: f (10-15 ), p (10-12 ), n (10-9 ), u or µ (10-6 ), m (10-3 ), K (103 ), M (106 ), G (109 ) Analysis Capabilities Overlay Graph Comparison A graphics plot can be stored and later recalled as an overlay plane. Four overlay planes can be stored. One plane can be overlaid onto the current data. Marker Marker to min/max, interpolation, direct marker, and marker slip Cursor Long and short, direct cursor. Line Two lines, normal mode, grad mode, tangent mode, and regression mode. Scaling Auto scale and zoom. Data Variable Display Up to two user defined parameters can be displayed on the graphics screen. Read Out Function The read out functions are built-in func- tions for reading various values related to the marker, cursor, or line. |
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