User`s guide

Agilent 4155C/4156C User’s Guide Vol.2, Edition 6 7-5
Measurement Units and Functions
Measurement Units
Type of SMUs
Following three types of SMUs are available:
• HRSMU (high resolution SMU)
• Only for the 4156C. The 4156C has four HRSMUs.
• Force and measure: up to ±100 V or ±100 mA.
• Maximum output power: 2 W.
• Minimum current measurement range: 10 pA with 1 fA resolution.
• Output and measurement ranges: see “HRSMU - High Resolution SMU” on
page 7-6.
• Kelvin connection is available.
• MPSMU (medium power SMU)
• The 4155C has four MPSMUs, and the 41501A/B option 420 or 422 has two
MPSMUs.
• Force and measure: up to ±100 V or ±100 mA.
• Maximum output power: 2 W.
• Output and measurement ranges: see “MPSMU - Medium Power SMU” on
page 7-9.
• HPSMU (high power SMU)
• Only for the 41501A/B. The 41501A/B option 410 or 412 has one HPSMU.
• Force and measure: up to ±200 V or ±1 A.
• Maximum output power: 20 W.
• Output and measurement ranges: see “HPSMU - High Power SMU” on page
7-12.
• Kelvin connection is available.
Each SMU has a compliance feature that limits output voltage or current to prevent
damage to your devices. When the SMU forces voltage, you can specify current
compliance. When the SMU forces current, you can specify voltage compliance.
For details about the compliance setting range and resolution, see “Compliance” on
page 7-23.