4285A-001

4285A-001 KEYSIGHT | Alldatasheet

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02 | Keysight | 4285A Precision LCR Meter – Data Sheet Specifications The complete Keysight Technologies, Inc. 4285A specifications are listed below. These specifications are the performance standards or limits against which the instrument is tested. When shipped from the factory, the 4285A meets the specifications listed in this section. The specification test procedures are covered in Keysight 4285A Maintenance Manual (Keysight Part Number 04285-90030). Measurement Functions Measurement parameters |Z| = Absolute value of impedance |Y| = Absolute value of admittance L = Inductance C = Capacitance R = Resistance G = Conductance D = Dissipation factor Q = Quality factor Rs = Equivalent series resistance Rp = Parallel resistance X = Reactance B = Suceptance ø = Phase angle Combinations of measurement parameters |Z|, |Y| L, C R G ø (deg), ø (rad) D, Q, Rs, Rp, G X B Mathematical functions The deviation and the percent of deviation of measurement values from a programmable reference value. Equivalent measurement circuit Parallel and series Ranging Auto and manual (hold/up/down) Trigger Internal, external, BUS (GPIB), and manual Delay time Programmable delay from the trigger command to the start of the measurement, 0 to 60.000 s in 1 ms steps. Measurement terminals Four-terminal pair Test cable length 0 m, 1 m, and 2 m selectable Integration time Short, medium, and long selectable (refer to Supplemental Performance Characteristics, page 14, for the measurement time) Averaging 1 to 256, programmable

03 | Keysight | 4285A Precision LCR Meter – Data Sheet Test Signal Frequency 75 kHz to 30 MHz, 100 Hz solution Frequency accuracy ±0.01% Signal modes Normal – Program selected voltage or current at the measurement terminals when they are opened or shorted, respectively Constant – Maintains selected voltage or current at the device under test (DUT) independent of changes in the device’s impedance. Signal level The following test signal level accuracy is specified for an ambient temperature range of 23 °C ± 5 °C and the test cable length is 0 m. Mode Range Setting accuracy Voltage Normal 5 mVrms to 2 Vrms ±{(8 + 0.4 fm)% + 1 mVrms} Constant 1 10 mVrms to 1 Vrms ±{(6 + 0.2 fm)% + 1 mVrms} Current Normal 200 μArms to 20 mArms ±{(8 + 1 fm)% + 40 μArms} Constant 1 100 μArms to 20 mArms ±{(6 + 0.2 fm)% + 40 μArms} 1. When the ALC function is set to ON For the temperature range of 0 °C to 55 °C, multiply the temperature induced setting error listed in Figure 1-5 to the test signal setting accuracy. When test cable length is 1 m or 2 m, add the following error due to test cable length. 0.2 x fm x L [%] where: fm = Test frequency [MHz] L = Test cable length [m] Output impedance The following output impedance is specified for the test cable length of 0 m: where: fm = Test frequency [MHz]

04 | Keysight | 4285A Precision LCR Meter – Data Sheet Test signal level monitor The following test signal level monitor accuracy is specified for an ambient temperature range of 23 °C ± 5 °C and the test cable length is 0 m. Mode Range Monitor accuracy Voltage Voltage 0.01 mVrms – 2.000 Vrms 4 + 0.2 fm + Sset ± { Smon } [V ] 100 500 Current Current 0.001 μArms – 20.00 mArms For the temperature range of 0 °C to 55 °C, multiply the temperature induced setting error listed in Figure 1-5. When test cable length is 1 m or 2 m, add the following error due to test cable length. Smon 0.2 x fm x L [V] where: fm = Test frequency [MHz] L = Test cable length [m] Smon = Readout value of test signal level Sset = Setting value of test signal level For example, Test frequency: 1 MHz Test signal level: 1 Vrms Monitor readout value: 500 mVrms Cable length: 1 m Ambient temperature: 25 °C Then, voltage level monitor accuracy Vma is 100 100 100 = 0.024 [V]

0.024 Vma = ————

0.5 ≈ 4.8 [%] Display Range Parameter Range |Z|, R, X 0.00001 Ω to 99.9999 MΩ |Y|, G, B 0.00001 μS to 99.9999 S C 0.00001 pF to 999.999 μF L 0.001 nH to 99.9999 H D 0.000001 to 9.99999 Q 0.01 to 99999.9 q –180.000° to 180.000° Δ –999.999% to 999.999%

05 | Keysight | 4285A Precision LCR Meter – Data Sheet Measurement Accuracy The measurement accuracy includes stability, temperature coefficient, linearity, repeatability, and calibration interpolation error. The measurement accuracy is specified when all of the following conditions are satisfied: – Warm-up time: ≥ 30 minutes – Test cable length: 0 m, 1 m (Keysight 16048A), or 2 m (Keysight 16048D). For the 1 m or 2 m cable length operation (with Keysight 16048A/D), CABLE CORRECTION has been performed – OPEN and SHORT corrections have been performed. – The optimum measurement range is selected by matching the DUT’s impedance to the effective measuring range shown in Figure 1-1 and Figure 1-2. (For example, if the DUT’s impedance is 3 kΩ and oscillator level is less than or equal to 1 V, the optimum range is the 500 Ω range.) – Measurement accuracy is specified at the following reference planes: – Test frequency ≤ 1 MHz At the UNKNOWN terminals on the Keysight 4285A front panel or at the end of the standard test leads (Keysight 16048A/D). – Test frequency ≥ 1.001 MHz At the 1-port terminal of the Keysight 16085B Terminal Adapter, which should be connected to the UNKNOWN terminals of the Keysight 4285A or to the end of the standard test leads (Keysight 16048A/D). |Z|, |Y|, L, C, R, X, G, and B accuracy |Z|, |Y|, L, C, R, X, G, and B accuracy Ae is given as Ae = ±(An + Ac) Kt [%] where: An = Basic accuracy equation given from the A1 to A16 shown in Table 1-1. The applicable frequency range and impedance range of equations A1 to A16 are shown in Figure 1-3 and Figure 1-4. (Refer to Basic Accuracy Equations on page 7.) Ac = Cable length factor (Refer to Cable Length Factor on page 10.) Kt = Temperature factor (Refer to Temperature Factor on page 10.) L, C, X, and B accuracies apply when Dx (measured D value) ≤ 0.1. When Dx > 0.1, multiply Ae by 1 + D2x for L, C, X, and B accuracies. R and G accuracies apply when Qx (measured Q value) ≤ 0.1. When Qx > 0.1, multiply Ae by 1 + Q2x for R and G accuracies. G accuracy given by the equation above applies to the G-B combination only.

07 | Keysight | 4285A Precision LCR Meter – Data Sheet D accuracy D accuracy De is given as 100 where: Ae = |Z|, |Y|, L, C, R, X, G, and B accuracy D accuracy applies when Dx (measured D value) ≤ 0.1. When Dx > 0.1, multiply De by (1 + Dx). Q accuracy Q accuracy Qe is given as 1 ± Qx x De where: Qx = Measured Q value De = D accuracy Q accuracy applies when Qx x De <1. F Accuracy q accuracy qe is given as π X 100 where: Ae = |Z|, |Y|, L, C, R, X, G, and B accuracy G Accuracy G accuracy Ge is given as Ge = ±Bx De [S] 2 πfLx where: Bx = Measured B value [S] Cx = Measured C value [F] Lx = Measured L value [H] De = D accuracy f = Test frequency [Hz] G accuracy applies when Dx (measured D value) ≤ 0.1. G accuracy given by the equation above applies to the Cp-G and Lp-G combinations only.

08 | Keysight | 4285A Precision LCR Meter – Data Sheet Rp accuracy Rp accuracy Rpe is given as Rpx X De Dx + De where: Rpx = Measured Rp value [Ω] Dx = Measured D value De = D accuracy Rp accuracy applies when D x (measured D value) ≤ 0.1. Rs accuracy Rs accuracy Rse is given as Rse = ± Xx X De [Ω] 2 πfCx where: Xx = Measured X value [Ω] Cx = Measured C value [F] Lx = Measured L value [H] De = D accuracy f = Test frequency [Hz] Rs accuracy applies when D x (measured D value) ≤ 0.1. Basic accuracy equations The basic accuracy An is calculated from the following procedure: 1. Determine An equation from Figure 1-3 or Figure 1-4. In both charts, boundary line belongs to the better accuracy area. When the oscillator level is ≤ 1 Vrms, determine An to be applied, value of Ki and value of Kosc from the Figure 1-3. If the determined Kosc ≤ 1, then round up Kosc to 1. When the oscillator level is > 1 Vrms, determine An to be applied and value of Ki from the Figure 1-4. 2. Calculate An from the formula to be applied. The n accuracy factor included in the A n equation is shown in Table 1-2. Use Ki and Kosc factors determined in previous step.

09 | Keysight | 4285A Precision LCR Meter – Data Sheet Table 1-1. An equations fm 30 |Zm| 30 fm 30 50 30 fm 5 500 30 fm 30 500 30 fm A5 = 0.18% + ——— . 0.02%] . Ki . Kosc fm 30 5k 30 fm 30 5k 30 |Zm| A8 = 0.18% + ———— . 0.03% . Ki . Kosc 50k fm 30 |Zm| 30 fm 30 100 30 fm 5 1k 30 fm 30 1k 30 |Zm| . 0.02%] . Ki 10k fm 30 10k 10 fm 30 10k 30 |Zm| . 0.03%] . Ki 100k |Zm|: Absolute value of measured impedance in [Ω] fm: Test frequency in [MHz]

10 | Keysight | 4285A Precision LCR Meter – Data Sheet Figure 1-3. Accuracy equations, Ki factor, and Kosc factor (test signal level ≤ 1 Vrms)

11 | Keysight | 4285A Precision LCR Meter – Data Sheet Figure 1-4. Accuracy equations and Ki factor (test signal level > 1 Vrms )

12 | Keysight | 4285A Precision LCR Meter – Data Sheet N accuracy factors N1 and N2 in the An equations have the following values: Table 1-2. N accuracy factors Frequency(f) N1 N2 75 kHz ≤ f ≤ 200 kHz 0.15 0.15 200 kHz < f ≤ 3 MHz 0.08 0.15 3 MHz < f ≤ 5 MHz .15 0.38 5 MHz < f ≤ 30 MHz 0.30 0.38 Cable length factor Add the following cable length factor Ac to the measurement accuracy when the cable length is set to 1 m (for 16048A) or 2 m (for 16048D) in CABLE field, after performing the cable correction and the OPEN/SHORT correction. When the cable length is 0 m, Ac is 0 percent. fmAc = ——— + Aco [%] Aco is the additional error when the impedance range is above 5 kΩ. 1000 where: fm = Test frequency in [MHz] Zm = Absolute value of measured impedance in [kΩ] Kl = Test cable length in [m] Temperature factor Multiply the sum of the basic accuracy and the cable length factor by the following temperature induced error Kt, when the temperature range is 0 °C to 55 °C. The boundary belongs to the smaller multiplier. multiplier. Figure 1-5. Temperature factor Kt

13 | Keysight | 4285A Precision LCR Meter – Data Sheet Measurement Accuracy Calculation Example Example of Ls-Q accuracy calculation Measurement conditions Measured inductance Lx of DUT: 220 nH Measured Q value of DUT: 30 Test signal level: 1 Vrms Test frequency fm: 25.2 MHz Integration time: LONG Cable length: 0 m Operating temperature: 28 °C Determine inductance measurement accuracy Ae 1. From |Z|, |Y|, L, C, R, X, G, and B Accuracy (see page 6), measurement accuracy Ae is determined as below: Ae = ± ( An + Ac ) x Kt 2. First of all, to determine the measurement accuracy Ae, calculate the impedance value from the DUT’s inductance value. So the measurement impedance Zm is: Zm = 2 πfmLx ≈ 35 [Ω] where: fm = Test frequency [Hz] Lx = Measured inductance value of the DUT [H] 3. Choose an accuracy chart from Figure 1-3 and Figure 1-4. The oscillator level is 1 Vrms, then Figure 1-3 is chosen for this measurement. 4. Find the frequency point of fm (25.2 MHz) along the X axis in Figure 1-3. Both axes are in log format. Interpolation may be required. 5. Find the impedance point of Zm (35 Ω) along the Y axis in Figure 1-3 determined in step 2. Both axes are in log format. Interpolation may be required. 6. Mark the intersection of above two steps and determine the basic accuracy equation An, integration factor K i, and oscillator level factor K osc. From: Test frequency fm: 25.2 MHz DUT’s impedance Zm: 35 Ω Integration time: LONG Test signal level: 1 Vrms Then, An = A1, Ki = 1, and Kosc = 1 (rounded from 0.02).

14 | Keysight | 4285A Precision LCR Meter – Data Sheet 7. From Table 1-1, the actual accuracy equation to be applied is determined as A1. Then, 30 |Zm| 30 8. Determine N1 from Table 1-2. From frequency = 25.2 MHz, then, N1 = 0.3. 9. Then, 30 |35| 30 ≈ 2.6 [%] 10. Cable length is 0 m, then Ac = 0. 11. Operating temperature is 28 °C, then Kt = 1 (from Figure 1-5). 12. Therefore, inductance measurement accuracy Ae is: Ae = ±(An + Ac) x Kt = ±(2.6 + 0) x 1 = ±2.6 [%] Determine Q measurement accuracy Qe 1. From Q Accuracy (see page 6), Q measurement accuracy Qe is determined as below: 1 ± Qx x De 2. Determine D accuracy De for calculating Qe. From the previous step Determine inductance measurement accuracy A e (see page 10), Ae is 2.6 [%], then: 100 = ± 0.026 3. Therefore Qe is: 1 ±Qx x De 1 ± 30 x 0.026 ≈ +106/–13

15 | Keysight | 4285A Precision LCR Meter – Data Sheet Correction Functions Zero open Eliminates measurement errors due to parasitic stray admittance (C, G) of the test fixture. Zero short Eliminates measurement errors due to parasitic residual impedances (L, R) of the test fixture. Load Improves the measurement accuracy by using a device whose value is accurately known (a working standard) as a reference. List Sweep A maximum of ten frequencies or test signal levels can be programmed. Single or sequential tests can be performed. When Option 4285A-001 is installed, DC bias voltages can also be programmed. Comparator Function Ten-bin sorting for the primary measurement parameter, and IN/OUT decision output for the secondary measurement parameter. Sorting modes Sequential mode. Sorting into unnested bins with absolute upper and lower limits. Tolerance mode. Sorting into nested bins with absolute or percent limits. Bin count 0 to 999999 List sweep comparator HIGH/IN/LOW decision output for each point in the list sweep table. Other Functions Store/Load Ten instrument control settings, including comparator limits and list sweep programs, can be stored and loaded into and from the internal nonvolatile memory. Ten additional settings can also be stored and loaded from each memory card. GPIB All control settings, measured values, comparator limits, and list sweep program can be controlled or monitored. Uses ASCII and 64-bit binary data format. GPIB buffer memory can store measured values for a maximum of 128 measurements and output packed data over the GPIB bus. Complies with IEEE-488.1 and 488.2. The programming language is Test and Measurement Systems Language (TMSL). GPIB interface functions SH1, AH1, T5, L4, SR1, RL1, DC1, DT1, C0, E1 Self test Softkey controllable. Provides a means to confirm proper operation. Option 4285A-001 (Internal DC Bias) Adds the variable DC bias voltage function.

16 | Keysight | 4285A Precision LCR Meter – Data Sheet DC bias level The following DC bias level accuracy is specified for an ambient temperature range of 23 °C ± 5 °C. Multiply the temperature induced setting error, Kt listed in Figure 1-5 for the temperature range of 0 °C to 55 °C. Voltage range Resolution Setting accuracy ±(0.000 to 4.000) V 1 mV ±(0.1% of setting +1 mV) ±(4.002 to 8.000) V 2 mV ±(0.1% of setting +2 mV) ±(8.005 to 20.000) V 5 mV ±(0.1% of setting +5 mV) ±(20.01 to 40.00) V 10 mV ±(0.1% of setting +10 mV) A maximum DC bias current of 100 mA can be applied to the DUT. DC bias monitor terminal DC bias voltage or current can be monitored at the rear panel BNC connector. The following monitor accuracies are applied when the digital volt meter whose input impedance is ≥ 10 MΩ is used. – DC bias voltage monitor DC bias voltage across the DUT x 1 Output impedance: 11 kΩ Monitor accuracy: ±(0.2% of reading + 2 + 0.8 x I dut) mV where: I dut is current flowing through the DUT in [mA]. – DC bias current monitor DC bias current through the DUT 10 Ω (1 V at 100 mA) Output impedance: 10 kΩ Monitor accuracy: ±(1% of reading + 0.3) mA

17 | Keysight | 4285A Precision LCR Meter – Data Sheet Other Options Option 4285A-700: No DC bias Option 4285A-002: Accessory Control Interface Allows the 4285A to control the Keysight 42841A bias current source or the Keysight 42851A precision Q adapter. The voltage ratio meaurement accuracy, when the 4285A is used with the 42851A precision Q adapter, is described in the 42851A’s operation manual. Option 4285A-201: Handler interface Option 4285A-202: Handler interface Option 4285A-301: Scanner interface Option 4285A-710: Blank panel Option 4285A-907: Front handle kit Option 4285A-908: Rack mount kit Option 4285A-909: Rack flange and handle kit Option 4285A-915: Add service manual Option 4285A-ABA: Add English manual Option 4285A-ABD: Add German manual Option 4285A-ABJ: Add Japanese manual Furnished Accessories Power cord Depends on the country where the 4285A is being used 100 Ω resistor box Keysight P/N 04285-61001 BNC female-female Adapter Keysight P/N 1250-0080 (4 ea.) Fuse Only for Option 4285A-201 Keysight P/N 2110-0046 (2 ea.) Accessories Available Test fixture/test leads 16034E Test fixture for SMD or chip type DUT, f ≤ 40 MHz 16044A Four-terminal test fixture for SMD or chip type DUT, f ≤ 10 MHz 16047A Test fixture for axial or radial DUT, f ≤ 13 MHz 16047D Test fixture for axial or radial DUT, f ≤ 40 MHz 16048A Test leads, length 1 m (BNC connector) 16048D Test leads, length 2 m (BNC connector) 16048G Test fixture for SMD or chip type DUT, f ≤ 110 MHz 16048H Test fixture for array-type SMD or chip type DUT, f ≤ 110 MHz 16065A External voltage bias fixture 16334A Tweezer-type test fixture for SMD or chip type DUT, f ≤ 15 MHz 16451B Dielectric test fixture 42842C Bias current test fixture 42851-61100 SMD test fixture (Option 42842C-201) DC bias source 42841A Bias current source Memory card 04278-89001 Memory card, 1 ea GPIB interconnection cables 10833A GPIB cable, 1 m 10833B GPIB cable, 2 m 10833C GPIB cable, 4 m 10833D GPIB cable, 0.5 m

18 | Keysight | 4285A Precision LCR Meter – Data Sheet Power Requirements Line voltage 100, 120, 220 Vac ±10%, 240 Vac +5% –10% Line frequency 47 to 66 Hz Power consumption 200 VA max. Operating Environment Temperature 0 °C to 55 °C Humidity ≤ 95% R.H. at 40 °C Dimensions 426 (W) by 177 (H) by 498 (D) (mm) Weight Approximately 16 kg (35.3 lb., standard) Display LCD dot-matrix display Capable of displaying Measured values Control settings Comparator limits and decisions List sweep tables Self test message and annunciations Number of display digits 6-digits, maximum display count 999999 Supplemental Performance Characteristics The Keysight 4285A supplemental performance characterisics are listed below. These supplemental performance characteristics are not specifications, but are typical characteristics included as supplemental information for the operator. Stability When the following conditions are satisfied, Integration time: LONG Operating temperature: Constant operating temperature of 23 °C ± 5 °C Parameter ≤ 1 MHz 30 MHz |Z|, |Y|, L, C, R < 0.01%/day < 0.05%/day D < 0.0001/day < 0.0005/day

19 | Keysight | 4285A Precision LCR Meter – Data Sheet Temperature coefficient When the following conditions are satisfied, Integration time: LONG Test signal voltage: ≥ 20 mVrms Operating temperature: 23 °C ± 5 °C Parameter ≤ 1 MHz 30 MHz Settling time Frequency (fm) < 50 msec. Test signal level < 100 msec. Measurement range < 50 msec./range shift Input protection Internal circuit protection, when a charged capacitor is connected to the UNKNOWN terminals. The maximum capacitor voltage is: —1Vmax = \` — — [V] C where: Vmax = ≤ 200 V C = Capacitance value in Farads Measurement time Typical measurement times from the trigger to the output of EOM at the Handler Interface. (EOM: End of Measurement) Integration time Measurement time SHORT 30 ms MEDIUM 65 ms LONG 200 ms In the following condition an additional measurement time, approx. 300 ms, is added to the measurement time. Test signal voltage: 0.51 V – 2 Vrms Measurement range: 0 Ω Range Test signal current: ≥ 22 mA

20 | Keysight | 4285A Precision LCR Meter – Data Sheet Display time Display time for each display format is given as: MEAS DISPLAY page Approx. 8 ms BIN No. DISPLAY page Approx. 5 ms BIN COUNT DISPLAY page Approx. 0.5 ms GPIB data output time Internal GPIB data, processing time from EOM output to measurement data output on GPIB lines (excluding display time): – Approx. 10 ms Option 4285A-001 (internal DC bias) Maximum DC bias current when the normal measurement can be performed is 100 mA. DC bias settling time When DC bias is set to ON, add 5 ms to the measurement time. This settling time does not include the DUT charge time. Sum of DC bias settling time plus DUT (capacitor) charge time is shown in the following figure. Figure 1-6. Sum of the DC bias settling time and DUT (capacitor) charge time

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