E4980AU-007 Datasheet, PDF (36/38 Pages) Keysight Technologies – Precision LCR Meter

36 | Keysight | E4980A Precision LCR Meter 20 Hz to 2 MHz, E4980AL Precision LCR Meter 20 Hz to 300 kHz/500 kHz/1 MHz – Data Sheet
Relative measurement accuracy with bias current isolation
When DC bias Isolation is set to ON, add the following value to the open offset Yo.
Equation 20.
Zm [Ω]
Fm [Hz]
Vs [V]
Yo_DCI1,2 [S]
Idc [A]
Yo_DCI1 × (1 + 1/(Vs)) × (1 +√(500/Fm)) + Yo_DCI2
Impedance of DUT
Test frequency
Test signal voltage
Calculate this by using Table 61 and 62
DC bias isolation current
Table 66. Yo_DCI1 value
DC bias current range
20 µA
200 µA
2 mA
20 mA
100 mA
Measurement time mode
SHORT
0S
0.25 nS
2.5 nS
25 nS
250 nS
MED, LONG
0S
0.05 nS
0.5 nS
5 nS
50 nS
Table 67. Yo_DCI2 value
DC bias current Measurement time mode
range
≤ 100 Ω
300 Ω, 1 k Ω
20 µA
0S
0S
200 µA
0S
0S
2 mA
0S
0S
20 mA
0S
0S
100 mA
0S
300 nS
3 k Ω, 10 k Ω
0S
0S
0S
30 nS
300 nS
30 k Ω, 100 k Ω
0S
0S
3 nS
30 nS
300 nS
DC bias settling time
When DC bias is set to ON, add the following value to the settling time:
Table 68. DC bias settling time
Bias
1
Standard
2
Option 001
Settling time
Capacitance of DUT × 100 × loge (2/1.8 m) + 3 m
Capacitance of DUT × 100 × loge (40/1.8 m) + 3 m
100 sec
10 sec
1 sec
100 msec
10 msec
1 µF
Figure 12. DC bias settling time
2.
1.
10 µF 100 µF 1 mF
DUT capacitance
10 mF
100 mF