Agilent 4284A Technical Overview

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Agilent 4284A/4285A Precision LCR Meter Family

20 Hz to 1 MHz 75 kHz to 30 MHz

Technical Overview

A new standard for precise component, semiconductor and material measurements

Agilent precision LCR meter family

Utilize state-of-the art measurement technologies

• 6-digits of resolution at any range

• Basic accuracies of

0.05% (Agilent 4284A) and

0.1% (Agilent 4285A)

• 20 impedance parameters to access and measure

• Constant V or I test signal level

• 20 Vrms test signal level (Agilent 4284A)

Move your process toward error-free operation

• Instrument setup state storage

• Comparator functions

• Selectable frequency error corrections

• Open, short and load corrections remove parasitics

Key specifications

Agilent 4284A precision LCR meter

Test frequency 20 Hz to 1 MHz over 8610 selectable frequencies

Measurement range

|Z|, R, X :0.01 mΩ to 99.9999 MΩ |Y|, G,B :0.01 nS to 99.9999 S

C :0.01 fF to 9.99999 F L :0.01 nH to 99.9999 kH D :0.000001 to 9.99999 Q :0.01 to 99999.9

Basic accuracy |Z| , C and L:0.05% D:0.0005

Test signal level range

Voltage 5 mVrms to 2 Vrms Current 50 µArms to 20 mArms

Constant test signal level range

Voltage 10 mVrms to 1 Vrms Current 100 µArms to 10 mArms

Measurement time

39 ms/190 ms/830 ms at 1 kHz

4284A with Option 4284A-001

Test signal level range

Voltage 5 mVrms to 20 Vrms Current 50 µArms to 200 mArms

Constant test signal level range

Voltage 10 mVrms to 10 Vrms Current 100 µArms to 100 mArms

Internal DC bias ± (1 mV ~ 40 V), ≤ 100 mA, 0.1% accuracy

4284A with Option 4284A-002 and 42841A

DC current bias 0.01 A to 20 A (with 42841A and 42842A)

0.02 A to 40 A (with 42841A x 2 ea., 42842B and 42843A)

1. Refer to specifications for complete accuracy.

2. Supplimental information only.

Satisfying your performance needs

Adapt instrument configurations to fit your test needs

• Internal voltage biasing up to ±40 Vdc

• High current biasing up to 40 A dc

(Agilent 4284A)

• Wide range of frequencies, 20 Hz to 30 MHz

• BIN’ing and comparator functions for handlers

• SMD, axial and radial test fixtures

Simplify your system development and integration

• Programming language compatible with IEEE 488.2

• Test port extensions: maximum 4 m for 4284A

and 2 m for 4285A

• Identical operation for the entire family of products

• Scanner, handler and GPIB interfaces

Key specifications

Agilent 4285A precision LCR meter

Test frequency 75 kHz to 30 MHz with 100 Hz resolution

Measurement range

|Z|, R, X :0.01 m Ω to 99.9999 MΩ |Y|, G,B :0.01 nS to 99.9999 S

C :0.01 fF to 999.999 µF L :0.001 nH to 99.9999 H D :0.000001 to 9.99999 Q :0.01 to 99999.9

Basic accuracy |Z|, C and L:0.1% D:0.001

Test signal level range

Voltage 5 mVrms to 2 Vrms Current 200 µArms to 20 mArms

Constant test signal level range

Voltage 10 mVrms to 1 Vrms Current 100 µArms to 20 mArms

Measurement time

30 ms/65 ms/200 ms

4285A with Option 4285A-001

Internal DC bias ± (1 mV ~ 40 V), ≤ 100 mA, 0.1% accuracy

4285A with Option 4285A-002, 42841A, and 42842C

DC current bias 0.01 A to 10 A

1. Refer to specifications for complete accuracy.

2. Supplimental information only.

3. The options, the accessories, or the test fixtures are needed.

Dissipation factor rise due to high ac signal

Versatile component measurements

Characterize inductive devices

• Sweep high current conditions

• Identify device properties precisely

• Test to RF frequencies

Low frequency measurements: Agilent 4284A

Inductive devices can now be accurately characterized from 20 Hz to 1 MHz with a dc bias current up to 40 A

dc.

High frequency measurements: Agilent 4285A

The Agilent 4285A’s wide 75 kHz to 30 MHz range allow you to test RF inductors with improved accuracy and 0.001 nH resolution. Magnetic heads, ferrite-cores, and power inductors that need to be tested at a specified current signal level can be easily tested with the Agilent 4285A.

Precise ceramic capacitor measurements

• Test at 1 kHz and 1 MHz

• Resolve measurements to low values

• Maintain constant signal levels

1 kHz and 1 MHz are the primary testing frequencies for ceramic materials and capacitors. The Agilent 4284A can provide these test frequencies while maintaining an equally excellent accuracy and 6-digits of measurement resolution.

1 MHz accuracies of capacitance (0.05%) and dissipation factor (0.0005) are essential for characterizing DUTs with low dissipation factors. Dissipation factors can change as a function of the applied test signal level to the DUT. For reliable and consistent measurements, the Agilent 4284A can maintain a constant voltage test signal level.

Inductance rolloff due to high dc current bias

1. Need Option 4284A-001

C-V characteristics sample—MOS diode

Adaptable parameter testing

Discover new material properties

• High accuracy and precise

measurements

• Wide frequency ranges

• High test signal levels

• Agilent 16451B dielectric test fixture

The Agilent precision LCR meter family provides the accuracy, resolution, high test signal and bias levels

required for material measurements. Using the Agilent 16451B dielectric test fixture provides you with accurate permittivity and dissipation factor measurements.

The ability to output a constant test signal level permits repeatable and accurate magnetic/dielectric measurements. Both the Agilent 4284A and Agilent 4285A offer variable voltage and current test signal level control.

Semiconductor testing

• Extend the test cable to the DUT

• Detect small parameter changes

• Rapidly acquire data

• Test at multiple frequencies

Both instruments allow you to extend the front panel measurement port through test cables, switches, and probers directly to the DUT. The 6-digits of resolution give you the ability to sense and identify changes not normally seen by conventional LCR meters.

The accuracies of the Agilent 4284A at key test frequencies up to 1 MHz permit complete DUT evaluation for either production or laboratory needs.

For high speed device testing at frequencies above 1 MHz, the best solution is the Agilent 4285A.

A material’s characteristics versus frequency

1. Need Option 4284A/4285A-001

Production test

Reduce production test factors

• Increase test throughput

The precision LCR meter family reduces testing costs by providing accurate high throughput testing.

• Interface easily to handlers

Built-in comparator, cable compensation

, and interfaces

permit system integration.

• Minimize operator error

Instrument state storage minimizes costly setup errors.

Quality assurance

Automated quality assurance

• Reduce your system development time

The Agilent 4284A and Agilent 4285A are designed to be used as elements in systems. This means GPIB, programming, and the ability to interface with scanners

• Painlessly integrate the system

GPIB and a scanner

interface allow the instruments to easily

integrate into system configurations.

• Leverage your programming experience

Learning to program one instrument automatically means you learn both.

One LCR meter family for your product’s life cycle

Research and development

Research tomorrow’s electronic components now

• Increase measurement confidence

The basic accuracies are:

Agilent 4284A 0.05% and Agilent 4285A 0.1%.

• Detect 1 ppm changes

The 6-digits of resolution permit you to measure differences in materials not detectable before.

• Fit the instrument to your test needs

For low frequency applications the Agilent 4284A is the ideal tool. For testing at RF frequencies the Agilent 4285A is the best solution.

Material design

Design and test new materials

• Material test fixtures For accurate permittivity and dissipation factor measurements of solid dielectric materials, the 16451B dielectric test fixture is provided. The 16452A liquid test fixture is provided for the permittivity measurements of liquids with minimal conductivity.

• Sample program

By using the sample program in the operation manual of 16451B, complex permittivity can be calculated rather easily and instantly. In addition, with the use of a spreadsheet software, the frequency response of permittivity can be displayed in a graph.

1. For 4284A, need Option 4284A-006

2. Choose the combination from Option 4284A/4285A-201, 4284A/4285A-202, or 4284A/4285A-301

3. Need Option 4284A/4285A-301

Comprehensive incoming inspection

Satisfying difficulties and requirements of impedance measurements during incoming inspection

Many types of measurements requiring a variety of measurement conditions have to be carried out during incoming inspection. However, as measurement instruments cannot perform all of the measurements required, substitute measurements are made. On the other hand, purchasing all the necessary equipment would substantially increase capital costs.

By employing the precision LCR meter family, a wide frequency range is covered (20 Hz to 1 MHz for 4284A and 75 kHz to 30 MHz for 4285A) and various test signal levels can be set (20 Vrms/200 mArms for 4284A Option 4284A-001 and 2 Vrms/20 mArms for 4285A). In addition, the ALC function allows measurements of constant-voltage and constant-current signals, and the added capability of Option 4284A/4285A-001 enables up to ±40 V of dc bias to be applied to the DUT. As a result of these features, a variety of measurement conditions can be carried out.

Furthermore, the precision LCR meter family achieves high accuracy measurements (basic |Z| measurement accuracy: 0.05% for 4284A and 0.1% for 4285A), permitting the characteristics of inductors and capacitors to be evaluated with excellent reliability. Also, built-in compensation functions reduce the influence of test fixtures to a minimum, further raising the reliability.

Built-in functionalities for efficient measurements

In order to save time and facilitate the efficiency of measurement routines, the precision LCR meter family has the following features. The memory card

allows the measurement conditions to be preset for various components with different measurement needs. The comparator function can be set to sort into a maximum of 10 BINs, enabling many components to be handled during inspection. The Option 4284A/4285A-301 scanner interface solves the problem of having discrepancies in measurement values for different channels of the switching matrix by allowing channel compensation for up to 128 channels.

1. Need Option 4284A/4285A-004

User friendly Interface

Simple front panel operation

• Clearly view the display

• See all instrument settings

• Interactive softkeys for simple control

Directly view all instrument settings and measurement results on the large LCD display. This simplifies operation and improves operator efficiency by minimizing readout error.

The softkeys simplify front panel operation by allowing the user to easily change instrument states by moving the LCD cursor with cursor keys. The softkeys will automatically change to reflect the cursor’s position. This minimizes the number of menus and key strokes.

Non-volatile memory

• Eliminate costly setup errors

• Increase user productivity

• Archive tests

The instruments contain two types of user accessible memory; internal and external (memory cards)

. The memory can easily be used to store measurement setups. Later, a setup can be loaded back into the instrument. This reduces test setup errors and increases the user’s productivity.

The memory can store 10 different instrument states, complete with correction data and system configuration. Entire setups including limit information can now be stored and loaded using either the internal memory or the memory card

The memory card

system is completely

electronic and is based on EEPROM.

Customized test frequencies

Inserting the memory card

1. Need Option 4284A/4285A-004

Testing with the proper tools

Measure the components’ performance in your power supply

• Test your components under load conditions

• Bias inductive devices with high currents

• Satisfy your needs with the right instrument

Designing advanced switching power supplies require the use of inductors and transformers that operate in the RF regions.

For low frequencies, the Agilent 4284A

precision LCR meter with the Agilent 42841A bias current source, and the 42842A/B bias current test fixtures all combine to form a 40 A dc test system.

Where a high frequency measurement is required, use an Agilent 4285A

, an Agilent 42842C bias current test fixture, and an Agilent 42841A bias current source to achieve up to 10 A dc biasing with measurements at 30 MHz.

Reduce system development time

The 4284A and 4285A employ a programming language, which is compatible with the IEEE 488.2. Since the command names are similar to the measurement functions, the time spent for creating and debugging programs can be largely minimized. The operation manual lists several key sample programs, allowing the user to efficiently create a program for their measurement system.

High current bias for inductor testing under load conditions

Code generation made easy

1. Need Option 4284A-002

2. Need Option 4285A-002

Specifications

All specifications are common to the Agilent 4284A and Agilent 4285A unless otherwise noted.

Measurement functions

Measurement parameters

|Z| (impedance), |Y| (admittance), q (phase), R (resistance), X (reactance), G (conductance), B (susceptance), L (inductance), C (capacitance), Q (quality factor), D (dissipation factor), ESR (equivalent series resistance) and Rp (parallel resistance).

20 parameter combinations are available

Equivalent circuit modes: Series and parallel

Mathematical functions: Deviation and percent deviation

Trigger: Internal, external and manual

Delay time: 0 to 60.000 s in 1 ms steps

Measurement terminals: Four-Terminal Pair

Test cable lengths:

Agilent 4284A-standard: 0 and 1 meter

Option 4284A-006: adds 2 and 4 meter extension

Agilent 4285A-standard: 0.1 and 2 meters

Integration time: Short, medium and long

Test signal

Test frequency:

Agilent 4284A: 20 Hz to 1 MHz, 8610 selectable frequencies Agilent 4285A: 75 kHz to 30 MHz, 100 Hz steps

Frequency accuracy: ±0.01%

Output impedance:

Agilent 4284A: standard: 100 Ω ±3%

Option 4284A-001: 100 Ω ±6%

Agilent 4285A: (25 + 0.5 f

) Ω ±10% @ 1 MHz, ±30% @ 30 MHz,

= test frequency in MHz

AC test signal modes:

Normal: Programs 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 independent of changes in the device’s impedance.

AC test signal

Agilent 4284A: standard

Range Accuracy

Normal V 5 mVrms to 2 Vrms ±(10% + 1 mVrms)

I 50 µArms to 20 mArms ±(10% + 10 µArms)

Constant V 10 mVrms to 1 Vrms ±(6% + 1 mVrms)

I 100 µArms to 10 mArms ±(6% + 10 µArms)

Agilent 4284A with Option 4284A-001

Range Accuracy

Normal V 5 mVrms to 20 Vrms ±(10% + 1 mVrms)

I 50 µArms to 200 mArms ±(10% + 10 µArms)

Constant V 10 mVrms to 10 Vrms ±(10% + 1 mVrms)

I 100 µArms to 100 mArms ±(10% + 10 µArms)

Specifications continued on page 11

Agilent 4285A: standard

Range Accuracy

Normal V 5 mVrms to 2 Vrms ±(8% + 0.4 fm% + 1 mVrms)

I 200 µArms to 20 mArms ±(8% + 1 fm% 40 µArms)

Constant V 10 mVrms to 1 Vrms ±(6% + 0.2 fm%+ 1 mVrms)

I 100 µArms to 20 mArms ±(6% + 0.2 fm%+ 40 µArms)

fm: test frequency in MHz

DC bias:

Standard: 0 V, 1.5 V and 2 V (Agilent 4284A only)

With Option 4284A/4285A-001: 0 V to ±40 V Rear panel DC bias monitor, BNC connector

Range Resolution Accuracy

±(0.000 to 4.000) V 1 mV ±(0.1% to 1 mV)

±(4.002 to 8.000) V 2 mV ±(0.1% to 2 mV)

±(8.005 to 20.000) V 5 mV ±(0.1% to 5 mV)

±(20.01 to 40.00) V 10 mV ±(0.1% to 10 mV)

Measurement range

Parameter Range

|Z|, R, X: 0.01 mΩ to 99.9999 MΩ |Y|, G, B: 0.01 nS to 99.9999 S C: 4284A: 0.01 fF to 9.99999 F

4285A: 0.01 fF to 999.999 µF

L: 4284A: 0.01 nH to 99.9999 kH

4285A: 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° ∆% -999.999% to 999.999%

Display

LCD Dot-matrix type display. Capable of displaying: measured values, control settings, comparator limits and decisions, list sweep tables, self test messages and annunciations.

Correction function

Open/short: Eliminates measurement errors due to stray parasitic

impedance in the test fixture.

Load: Improves measurement accuracy by using a calibrated

device as a reference.

List sweep function

A maximum of ten frequencies or test levels can be programmed. Single or sequential testing can be performed. When Option 4284A/4285A-001 is installed, dc bias sweep can also be performed.

Specifications continued on page 12

Specifications

Continued from page 10

1. Refer to measurement accuracy.

Comparator function

Ten bin sorting for the primary measurement parameter, IN/OUT for the secondary measurement parameter.

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 setups can be stored/loaded from the

internal non-volatile memory. Ten additional setups can also be stored/loaded from each memory card

GPIB: All instrument control settings, measured values,

comparator limits, list sweep tables, and self test results.

Memory: Memory buffer can store a maximum of 128 measurement

results and output the date over GPIB, ASCII and 64 bit binary data formats.

Options

Option 4284A/4285A-001: Power amplifier/dc bias

This option cannot be operated simultaneously with Option 4284A/4285A-002.

Agilent 4284A: Increases the AC test signal to 20 Vrms/0.2 Arms.

Extends bias range to variable ±40 Vdc. Rear panel BNC for dc voltage monitor.

Agilent 4285A: Adds variable ±40 Vdc. Rear panel BNC for dc voltage

monitor and current monitor.

Option 4284A/4285A-002: Accessory control interface/bias current

Interface allows the Agilent precision LCR meter to control the Agilent 42841A bias current source. This option cannot be operated simultaneously with Option 4284A/4285A-001.

Option 4284A-006: 2 m/4 m cable length operation (4284A only)

Increases test cable length capability. Adds 2 and 4 meter operation.

Option 4284A/4285A-201: Handler interface

This is a general purpose comparator/handler interface. Nine-sets of HIGH/LOW limits can be input allowing 10-bin sorting for L, C, or IZI. The handler interface enables systemization with an automatic component sorting machine. All signals are optically isolated.

Option 4284A/4285A-202: Handler interface

Option 4284A/4285A-301: Scanner interface

Open/short/load correction data for multiple channels is stored in non-volatile memory, a maximum of 128 for the Agilent 4284A and 90 for the Agilent 4285A. Three frequencies can be corrected on the Agilent 4284A while seven frequencies can be corrected on the Agilent 4285A.

Specifications continued on page 13

Specifications

Continued from page 11

1. Need Option 4284A/4285A-004

General

Power requirements 100 V/120 V/220 V ±10%, 240 V +5%/-10%,

47 Hz to 66 Hz.

Power consumption 200 VA

Operating temperature and humidity 0 °C to 55 °C, < 95% RH at 40 °C

Size 426(W) x 177(H) x 498(D) mm

Weight Agilent 4284A: 15kg (33lb.) Agilent 4285A: 16kg (35.2lb.)

Supplemental performance characteristics (Not guaranteed)

Agilent 4284A

Stability Medium integration and constant operating temperature

of 23 °C ±5 °C.

|Z|, |Y|, L, C, R < 0.01%/day D < 0.0001/day

Temperature coefficient Medium integration and 23 °C ±5 °C.

Agilent 4285A

Stability Long integration and constant operating temperature

of 23 °C ±5 °C.

≤ 1 MHz 30 MHz

|X|, |Y|, L, C, R 0.01 %/day < 0.05 %/day D 0.0001/day < 0.0005/day

Temperature coefficient Long integration, test signal voltage ≥ 20 mVrms

and 23 °C ±5 °C.

≤ 1 MHz 30 MHz

|X|, |Y|, L, C, R 0.004%/°C <0.05%/°C D 0.00004/°C <0.0005/°C

Settling time

Frequency

4284A < 70 ms; f

≥ 1 kHz

< 120 ms; 100 Hz ≤ f

< 1 kHz

< 160 ms; f

< 100 Hz

4285A < 50 ms

Test signal < 120 ms (4284A) < 100 ms (4285A)

Range < 50 ms/range shift; fm≥ 1 kHz

Input protection Internal circuit protection, when a charged capacitor is

connected to the unknown terminals. The maximum capacitor voltage is:

Vmax =√ 1/C (v) where: Vmax ≤ 200 V C is in Farads

Specifications continued on page 14

Specifications

Continued from page 12

Measurement time Time interval from a trigger command to the EOM

(end of measurement) signal output at the handler interface port.

Agilent 4284A setting time

Integrated time 100 Hz 1 kHz 10 kHz 1 MHz

Short 270 ms 40 ms 30 ms 30 ms Medium 400 ms 190 ms 180 ms 180 ms Long 1040 ms 830 ms 820 ms 820 ms

Agilent 4285A setting time

Integrated time 75 kHz ~ 30 MHz

Short 30 ms Medium 65 ms Long 200 ms

Option 4284A/4285A-001: DC bias current output: 100 mA max

Measurement accuracy (Agilent 4284A only)

The following conditions must be met:

1. Warm up time: ≥ 30 minutes

2. Ambient temperature: 23 °C ±5 °C

3. Test signal voltage: 0.3 Vrms to 1 Vrms

4. Test cable length: 0 m

5. Open and short corrections have been performed

6. D ≤ 0.1 for C, L, X and B measurements Q ≤ 0.1 for R and G measurements

See operation manual for additional conditions.

Accuracies are relative to calibrated standards. Absolute accuracies are given as: (Agilent 4284A’s relative accuracy +calibration uncertainty of standards).

Accuracy equations

|Z|, |Y|, L, C, R, X, G and B accuracies are given as:

±[A + (K

+ Kb+ Kc) x 100] (% of reading)

where: 1. A is basic accuracy as shown in figure 1

2. Kaand Kbare impedance proportional factors given in Table 2. The K

term is negligible for impedance above 500 Ω.

The K

term is negligible for impedances below 500 Ω.

3. K

is the calibration interpolation factor given in Table 1.

D accuracy is given as:

±[A

/100] (absolute D value)

where: 1. A

= [A + (Ka+ Kb+ Kc) x 100]

Q accuracy is given as (when Qx x De< 1):

±[(Q

x De)/(1 ](Qx x De)] (absolute Q value)

where: 1. Q

is the measured Q value

2. D

is the D accuracy

Specifications continued on page 15

Specifications

Continued from page 13

q accuracy is given as:

±[(180/p) x (A

/100)] (absolute degrees)

where: 1. A

= [A + (Ka+Kb+Kc) X 100]

Additional error due to temperature:

Multiply the measurement accuracy by the following temperature factors.

Example C and D accuracy calculation

Measurement conditions:

Frequency: 1 kHz Capacitance value: 100 nF Test signal level: 1 Vrms Integration time: Medium

Calculation:

Step 1: Use Figure 1 to determine A and Z

. a. Find the frequency along the X-axis. b. Find the capacitance value along a diagonal. c. Note the intersection of the values from steps a and b.

Interpolation may be necessary.

d. Each shaded area has two values for A; the upper

number is for medium and long integrations, the lower number is for short integration. A = 0.05%. Find Z

by extrapolating horizontally to the Y-axis

(impedance axis). Z

= 1590 Ω

Step 2: Use Tables 1 and 2 to find K

, Kband Kc.

a. Use the equations in Table 2 to find K

and Kb.

= (1 x 10-3/1590)(1+(200/1000)) = 7.5 x 10

-7

Kb= (1590(1 x 10-9) (1 + 70/1000)) = 1.67 x 10

-6

b. Use Table 1 to find Kcfor the given frequency.

= 0

Step 3: Calculate C and D accuracy.

C = 0.05 + (7.5 x 10

-7

+ 1.67 x 10-6+ 0) x 100% = 0.05%

D = 0.05/100 = 0.0005

Table 1. Kc: Calibration interpolation factor

Frequency K

Direct correction frequencies 0 All other frequencies 0.0003

Note: Direct calibration frequencies are 20, 25, 30, 40, 50, 60, 80, 100, 120, 150, 200Hz.

Sequence repeats for each decade up to 1 MHz. 48 frequencies total.

Specifications continued on page 16

Specifications

Continued from page 14

Table 2. Kaand Kb: Impedance proportional factors

Notes: 1. fmis the test frequency in (Hz)

2. |Zm| is the device’s impedance

3. Vs is the test signal level in (mVrms)

Specifications continued on page 17

Specifications

Continued from page 15

Figure 1. Baseline accuracy facto (4284A) (For additional accuracy information refer to the impedance accuracy equation on page 14.)

Notes: 1. Test signal level: 0.3 Vrms to 1 Vrms

2. Upper number, medium and long integration

3. Lower number, short integration

Specifications continued on page 18

Specifications

Continued from page 16

Additional specifications (Agilent 4284A only)

When measured value < 10 mΩ, |Z|, R, and X accuracy, which is described on page 14, is given as following equation.

|Z|, R, and X accuracy:

•±[(Ka + Kc) x 100] (%)

Where

• Ka = Impedance proportional factor (refer to Table 2)

• Kc = Calibration interpolation factor (refer to Table 1)

Measurement accuracy (Agilent 4285A only)

Accuracy is specified for the following conditions:

1. Warm up time: ≥ 30 minutes

2. Ambient temperature: 23 °C ±5 °C

3. Test signal level voltage: 0.2 Vrms to 1 Vrms

4. Test cable correction completed

5. Open and short corrections have been completed

6. D ≤ 0.1 for C, L, X and B measurements Q ≤ 0.1 for R and G measurements

7. For test frequencies above 10 MHz and DUT impedance ≥ 5 kΩ, the test signal level must be between 0.5 Vrms and 1 Vrms

These accuracies are absolute and include the calibration uncertainties of standards. Refer to the operation manual for additional setup conditions.

Accuracy equations

|Z|, |Y|, L, C, R, X, G and B accuracies are given as:

±(A

+ B) (% of reading)

where: 1. A

is the accuracy equation as specified by Figure 2 and

Table 3. A

ranges from A1to A8.

2. B is the test cable length factor in Table 5.

D accuracy is given as:

±[A

/100] (absolute D value)

Note: A

= (An + B)

Q accuracy is given as:

±[(Q

x De)/(1 ](Qx x De)] (absolute Q value)

Note: Specification valid only when Q

xDe

< 1. Qxis the measured

value of Q. D

is the computed D accuracy.

Specifications

Continued from page 17

Specifications continued on page 19

Table 3. Accuracy equations

Specifications continued on page 20

Specifications

Continued from page 19

q accuracy is given as:

±[(180/p) x (A

/100)] (absolute degrees)

Note: 1. A

= (An+ B)

Additional error due to temperature:

Multiply the measurement accuracy by the following temperature factors.

Example L and Q accuracy calculation

Measurement conditions:

Frequency: 500 kHz L value measured: 2 mH Test signal level: 1 Vrms Integration time: Long Cable length: 0 meters Q value measured (Qx): 200

Calculation:

Step 1: Use Figure 2 to determine A

and Zm. a. Find the frequency along the X-axis. b. Find the inductance value along a diagonal. c. Note the intersection of steps a and b.

In this case A

= A5. Refer to the equations in Table 3.

d. Note that in step c Z

is 6.3 kΩ.

Step 2: Use Tables 3 and 4 to determine A

and B.

a. A

is equation A5for long integration times:

0.18% + [(|Z

|/5 k) x 0.02%]

b. A

yields a value of 0.21%

c. Table 4 indicates that B has a value of 0.

(@ cable length = 0 m)

d. L accuracy is ±(A

+ B) = 0.21%

e. Determine D accuracy (D

): (An+ B)/100 = 0.0021

f. Q accuracy: (∆Q)

±[(Q

x De)/(1 ] (Qxx De)]

g. ∆Q yields a value of –57 to 133, Actual Q: 143 to 333

, N2and N3are in Table 3.

Table 4. Cable length correction

Test cable length B (%)

0 meter 0 1 meter (16048A) f

/15

2 meter (16048D) f

/15

(fm: test frequency in MHz)

Specifications continued on page 21

Specifications

Continued from page 19

Figure 2. Accuracy equation (An) frequency and impedance range (4285A)

Note: For additional accuracy information, refer to the impedance accuracy equation on page 18. The symbol in

parenthesis (An) represents accuracy equations in Tables 3 and 4. (Measurements outside Figure 2 are permitted but accuracies are not specified.)

Specifications

Continued from page 20

Accessories

The Agilent 42841A is used with either the Agilent 4284A or Agilent 4285A for high dc current bias measurements.

Agilent 42841A bias current source

Bias current output: Up to 20 Adc maximum, 0.01 Adc steps

Current accuracy: ±1% to 1A, ±2% to 5A, ±3% to 20 A

Output voltage: 38 Vdc maximum (for more details see

page 23)

Frequency range: Agilent 4284A: 20 Hz to 1 MHz

Agilent 4285A: Up to 30 MHz when combined with the

Agilent 42842C bias current fixture.

Test signal voltage: 0.5 Vrms to 2 Vrms

Basic measurement accuracy:

Agilent 4284A: 2% for < 1 kHz, 1% for 1 kHz to 1 MHz Agilent 4285A: √ f

% + Agilent 4285A accuracy

= test frequency in MHz)

Interface: Custom, directly controllable by the Agilent

4284A/4285A with Option 4284A/4285A-002

The Agilent 42842A/B/C are fixtures designed to interface from the Agilent 42841A bias current source to inductive DUT’s.

Agilent 42842A/B/C bias current test fixture

Agilent 42842A: Up to 20 Adc maximum, used only with the

Agilent 4284A

Agilent 42842B: Up to 40 Adc maximum, used only with the

Agilent 4284A

Basic impedance accuracy:

Refer to Agilent 42841A specifications

Component dimensions (maximum):

80 mm (W) x 80 mm (H) x 80 mm (D)

Agilent 42842C: Up to 10 Adc maximum, used only with the

Agilent 4285A. Option 42842C-001 adds the SMD test fixture.

Component dimensions (maximum):

60 mm (W) x 50 mm (H) x 60mm (D)

20A measurement system

40A measurement system

Bias current system configuration for 42842C

Agilent 42843A bias current cable

This cable is used with the Agilent 4284A for configurations greater than 20 Adc. Refer to the configuration table in the ordering information section.

This is the SMD test fixture, which is furnished with 42842C when Option 42842C-001 is ordered.

Frequency: ≤ 30 MHz

Maximum DC bias voltage: ±40 V

Agilent 42851-61100 SMD test fixture Maximum DC bias current: ±2 A

Temperature induced error of 42841A (40A configuration)

Supplemental characteristics data for the 42841A

Impedance measurement accuracy and applicable measurement range:

The figure to the right shows the inductance measurement accuracy of the 42841A measurement system configured for 40 A. The inductance measurement accuracy represents the tolerance of additional errors to the 4284A’s measurement accuracy and is applicable at the 42842A/B’s measurement terminals when all of the following conditions are satisfied:

(1) 4284A integration mode: long

(2) Test signal voltage level: 1 Vrms

(3) Test cable: 16048A

(4) Short compensation has been performed

(5) Surrounding temperature: 5 °C to 45 °C

(6) DUT’s dissipation factor D < 1

The entire system’s measurement error is given as 4284A accuracy + 42841A accuracy (see figure) + additional error due to temperature (see table). For more information see the operational manual of 42841A.

Bias current settling time:

The typical time required for the bias current to reach 99% of setting from 0 A is given as:

Bias current ≤ 1 A: 1 s + I bias + 0.6 s Bias current ≤ 5 A: 0.2 s + I bias + 0.6 s

Bias current > 5 A: 0.1 s + I bias + 0.6 s

where I bias is bias current setting in amperes.

Output voltage characteristics

Inductance measurement accuracy of 42841A (40A configuration)

Test fixtures

Agilent 16047A

Agilent 16034G Agilent 16334A

Surface mount device fixture

Agilent 16034G/H test fixtures

Frequency: ≤ 110 MHz

Maximum DC bias voltage: ±40 V

Agilent 16334A test fixture

Frequency: ≤ 15 MHz

Cable length: 1 meter

Maximum DC bias voltage: ±40 V

Agilent 16047E Agilent 16065A

Radial and Axial lead fixtures

Agilent 16047A/D test fixture

Frequency: ≤ 13 MHz (A)

≤ 40 MHz (D)

Maximum DC bias voltage: ±35 V (A)

±40 V (D)

Agilent 16047E test fixture

Frequency: ≤ 110 MHz

Maximum DC bias voltage: ±40 V

Agilent 16065A external voltage bias fixture

Frequency: 50 Hz to 2 MHz

Maximum external

DC bias voltage: ±200 V

Maximum AC voltage: ±7 V

Blocking capacitor of 5.6 µF is connected in series with the Hc terminal.

Test fixtures continued on page 25

Agilent 16451B

Dielectic material test fixture

Agilent 16451B dielectric test fixture

Frequency: ≤ 30 MHz

Function: Dielectric constant and dissipation factor

Please refer to the Accessories Selection Guide for Impedance Measurements (part number 5965-4792E) for the measurement accuracy and measurement methods.

Cable test leads and Kelvin clips

Agilent 16048 series test leads

Connector type: BNC (A/D/E)

SMC (B)

Cable Length:

16048A: 0.94 m 16048-60030: 1 m 16048D: 1.89 m 16048E: 3.8 m

Frequency: ≤ 30 MHz (A/B/D)

≤ 1 MHz (E)

Maximum DC bias voltage: ±40 V

16089A/B/C/D/E Kelvin clips

Clip type: Kelvin (A/B/C/E)

Alligator (D)

Cable length: 0.94 m (A/B/C/D)

1.3 m (E)

Frequency: ≤ 100 kHz

Maximum DC bias voltage: ±40 V

Test fixtures

Continued from page 24

Agilent 16048A 16089A/B/C Kelvin clips

Ordering information Agilent 4284A 20 Hz to 1 MHz precision LCR meter

Note: No test fixture is supplied with the Agilent 4284A.

Furnished accessory: power cable.

Options:

Option 4284A-700: Standard power (2 V, 20 mA, 2 V DC bias) Option 4284A-001: Power amplifier/40V dc bias (see note 1) Option 4284A-002: Bias current interface (see note 1, 2) Option 4284A-004: Memory card Option 4284A-006: 2 m/4 m cable length operation Option 4284A-1A7: ISO 17025 compliant calibration Option 4284A-201: General purpose handler interface (see note 2, 3) Option 4284A-202: Specific handler interface (see note 2, 3) Option 4284A-301: Scanner interface (see note 2) Option 4284A-710: Blank panel Option 4284A-915: Add service manual Option 4284A-ABJ: Add Japanese operation manual Option 4284A-ABA: Add English operation manual

Note 1: Options 4284A-001 and 4284A-002 do not operate simultaneously. Note 2: A maximum of 2 of the following may be installed at one time:

Options 4284A-002, 4284A-201, 4284A-202, 4284A-301, 4284A-710 (2 each max.)

Note 3: Select either Option 4284A-201 or 4284A-202.

Agilent 4285A 75 kHz to 30 MHz precision LCR meter

Note: No test fixture is supplied with the Agilent 4285A.

Furnished accessory: power cable.

Options:

Option 4285A-700: No DC bias Option 4285A-001: 40V dc bias (see note 1) Option 4285A-002: Accessory control interface (see note 1, 2) Option 4285A-004: Memory card Option 4285A-1A7: ISO 17025 compliant calibration Option 4285A-201: General purpose handler interface (see note 2, 3) Option 4285A-202: Specific handler interface (see note 2, 3) Option 4285A-301: Scanner interface (see note 2) Option 4285A-710: Blank panel Option 4285A-915: Add service manual Option 4285A-ABJ: Add Japanese operation manual Option 4285A-ABA: Add English operation manual

Note 1: Options 4285A-001 and 4285A-002 do not operate simultaneously. Note 2: A maximum of 2 of the following may be installed at one time:

Options 4285A-002, 4285A-201, 4285A-202, 4285A-301, 4285A-710 (2 each max.).

Note 3: Select either Option 4285A-201 or 4285A-202.

Specifications continued on page 27

Cabinet options (Agilent 4284A and Agilent 4285A)

Option 4284A/4285A-907: Front handle kit Option 4284A/4285A-908: Rack mount kit Option 4284A/4285A-909: Rack flange and handle kit

Bias current accessories:

Agilent 42841A bias current source Agilent 42842A 20 Adc bias current test fixture Agilent 42842B 40 Adc bias current test fixture

Refer to the Accessories Selection Guide for Impedance Measurements (part number 5965-4792E) for details.

Agilent 42842C (10 Adc @ 30 MHz) bias current test fixture Option 4282C-001: surface mount device (SMD) test fixture (42851-61000) Agilent 42843A bias current cable

Test fixtures:

Agilent 16034E test fixture (SMD) Agilent 16034G test fixture (0603mm/0201inch -sized SMD) Agilent 16034H test fixture (Array-type SMD) Agilent 16044A test fixture (SMD, Kelvin contact) Agilent 16047A test fixture (Axial and radial) Agilent 16047D test fixture (Axial and radial) Agilent 16047E test fixture (Axial and radial) Agilent 16048A test leads (0.94 meters/BNC) Agilent 16048-60030 test leads (0.94 meters/SMC) Agilent 16048D test leads (1.89 meters/BNC) Agilent 16048E test leads (3.8 meters/BNC)) Agilent 16065A external voltage bias fixture Agilent 16334A test fixture (Tweezer contacts) Agilent 16451B dielectric test fixture Agilent 16452A liquid test fixture

Other accessories:

Agilent 16380A standard capacitor set (1, 10, 100, 1000 pF) Agilent 16380C standard capacitor set (10, 100, 1000 nF) 42030A Four-Terminal Pair standard resistor set (1 mΩ to 100 kΩ) 42090A open termination 42091A short termination

1.Dc bias current measurement configurations:

0-10 Amps dc bias configuration (Agilent 4285A only) Agilent 4285A with Option 4285A-002, 1 ea. Agilent 42841A bias current source, 1 ea. Agilent 42842C bias test fixture, 1 ea. Option 42842C-001 adds SMD test fixture Agilent 16048A test fixture, 1 ea.

0-20 Amps dc bias configuration (Agilent 4284A only)

Agilent 4284A with Option 4284A-002, 1 ea. Agilent 42841A bias current source, 1 ea. Agilent 42842A bias test fixture, 1 ea. Agilent 16048A test leads, 1 ea.

0-40 Amps dc bias configuration (Agilent 4284A only)

Agilent 4284A with Option 4284A-002, 1 ea. Agilent 42841A bias current source, 2 ea. Agilent 42842B bias test fixture, 1 ea. Agilent 42843A bias current cable, 1 ea. Agilent 16048A test leads, 1 ea.

Ordering information

Continued from page 26

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Agilent 4284A Technical Overview

Specifications and Main Features

Frequently Asked Questions

User Manual