The HP 4140B is a high-precision picoammeter and dual DC voltage source designed for measuring extremely low currents and performing quasi-static C-V (capacitance-voltage) characterization of semiconductor devices and materials.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | HP-IB (IEEE-488) (SH1, AH1, T5, L4, SR1, RL1, PP0, DC1, DT1, C0) |
| Display | 3.5-digit LED (current/capacitance), 4.5-digit LED (voltage) |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 100/120/220/240 V AC (±10%), 48-66 Hz, ~135 VA |
| Operating Temperature | 0 °C to 40 °C |
| Dimensions (W×H×D) | 426 mm × 177 mm × 498 mm |
| Weight | 13 kg |
Current Measurement Performance
| Parameter | Value |
|---|---|
| Measurement Ranges | ±1.000 x 10^-12 A to ±19.99 x 10^-3 A |
| Maximum Resolution | 10^-15 A (1 fA) |
| DC Current Accuracy | 0.5% |
| Calculated Capacitance Range | 0.1 pF to 1999 pF |
| Capacitance Measurement Ranges | Two ranges |
| Zero Offset Function | Available |
| Ranging Modes | Automatic or manual |
Voltage Source Specifications
| Parameter | Value |
|---|---|
| Voltage Source Output Range | ±100 V |
| Voltage Programming Resolution | 10 mV (10 V range), 100 mV (100 V range) |
| Voltage Ramp Rate | 0.001 V/s to 1.000 V/s (10 V range), 0.01 V/s to 10.00 V/s (100 V range) |
| Number of DC Voltage Sources | Two programmable sources |
| Selectable Source Current Limit | Available |
Measurement Speed and Timing
| Parameter | Value |
|---|---|
| Trigger Modes | INT, EXT, HOLD/MAN |
| Integration Times | Selectable (short, medium, or long) |
| Measurement Functions | I-V, C-V, I |
| Quasi-Static C-V Measurements | Supported |
| Hold and Step Delay Function | Programmable |
Inputs and Outputs
| Parameter | Value |
|---|---|
| Input Terminal Type | Triaxial |
| Analog Output | Available for plotting I-V, C-V data |
Environmental and Safety Compliance
| Parameter | Value |
|---|---|
| Self Test Function | Available |
Connectivity and Control Interfaces
| Parameter | Value |
|---|---|
| Parameter Selection and Entry | Manual or programmable |
Environmental
| Parameter | Value |
|---|---|
| Operating Humidity | ≤ 70% RH (at 40 °C) |
| Storage Temperature | -20 °C to +60 °C |
Performance
| Parameter | Value |
|---|---|
| Warm-up Time | 30 minutes |
Voltage Sources
| Parameter | Value |
|---|---|
| Voltage Source Accuracy | ±(0.5% of setting + 10 mV) on 10V range, ±(0.5% of setting + 100 mV) on 100V range |
| Voltage Source Output Impedance | < 0.2 Ω |
| Voltage Source Maximum Current | 10 mA |
Picoammeter (Current Measurement)
| Parameter | Value |
|---|---|
| Input Burden Voltage | ≤ 10 µV (10^-12 A to 10^-5 A ranges), ≤ 100 µV (10^-4 A to 10^-2 A ranges) |
Interfaces
| Parameter | Value |
|---|---|
| HP-IB Interface Capabilities | SH1, AH1, T5, L4, SR1, RL1, PP0, DC1, DT1, C0 |
Safety & Protection
| Parameter | Value |
|---|---|
| Maximum Allowable Input Voltage | 100 V |
Technology
Semiconductor Characterization / Low-Current Measurement
Applications
Picoampere current measurements and Quasi-Static C-V characterization
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