1-14 Agilent 4155B/4156B User’s Guide Vol.2, Edition 5
Measurement Units
Source/Monitor Unit (SMU)
Table 1-12 HPSMU Measurement Current Values and Resolutions
When SMU is pulsed source, set pulse parameters in following ranges:
Pulse width 0.5 ms to 100 ms, 100 ms resolution
Pulse period 5 ms to 1 s, 100 ms resolution
where pulse period ³ pulse width + 4 ms
Be aware that if any of following are true, pulsed SMU channel may not output the
pulse period and pulse width you specified:
• Measurement range differs from compliance range (lowest range that includes
compliance).
• Ranging mode is set to auto range or limited auto range.
• Multi-channel measurement is set.
Range
Measurement Value
a
a. This column is applied to the auto ranging or the limited auto ranging. For fixed ranging, maximum mea-
surement value is Range column value.
Measurement Resolutions
b
b. Measurement resolution depends on the integration time setting. For Knob sweep measurement, see the
column of Integration Time 80 ms to 560 ms.
Integration Time
High Speed
Sampling
Measurement
c
c. This column is applied to the sampling measurement that initial interval is set to 480 ms or shorter.
1PLC or
Longer
640 ms to 1.92
ms
80 ms to 560 ms
1 nA 0 £ ½I½ £ 1.15 nA 10 fA 10 fA 100 fA 1 pA
10 nA 0 £ ½I½ £ 11.5 nA 10 fA 100 fA 1 pA 10 pA
100 nA 0 £ ½I½ £ 115 nA 100 fA 1 pA 10 pA 100 pA
1 mA0 £ ½I½ £ 1.15 mA 1 pA 10 pA 100 pA 1 nA
10 mA0 £ ½I½ £ 11.5 mA 10 pA 100 pA 1 nA 10 nA
100 mA0 £ ½I½ £ 115 mA 100 pA 1 nA 10 nA 100 nA
1 mA 0 £ ½I½ £ 1.15 mA 1 nA 10 nA 100 nA 1 mA
10 mA 0 £ ½I½ £ 11.5 mA 10 nA 100 nA 1 mA10 mA
100 mA 0 £ ½I½ £ 50 mA 100 nA 1 mA10 mA100 mA
50 mA < ½I½ £ 115 mA 100 nA 1 mA10 mA100 mA
1 A 0 £ ½I½ £ 1 A 1 mA10 mA100 mA1 mA
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