Agilent Technologies 4284A Guida all'installazione

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 range1

|Z|, R, X :0.01 mΩto 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 239 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 Vdc3

• High current biasing up to 40 A dc3

(Agilent 4284A)

• Wide range of frequencies, 20 Hz to

30 MHz

• BIN’ing and comparator functions for

handlers

• SMD, axial and radial test fixtures3

Simplify your system

development and integration

• Programming language compatible

with IEEE 488.2

• Test port extensions: maximum 4 m

for 4284A3and 2 m for 4285A

• Identical operation for the entire

family of products

• Scanner, handler and GPIB interfaces3

Key specifications

Agilent 4285A precision LCR meter

Test frequency 75 kHz to 30 MHz with 100 Hz resolution

Measurement range1

|Z|, R, X :0.01 m Ωto 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 time230 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 A1dc.

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 levels1required 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 frequen-

cies 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 compensation1, and interfaces2

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 scanners3.

• Painlessly integrate the system

GPIB and a scanner3interface 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 soft

ware, 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 card1 allows the measurement conditions to be pre-

set 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 prob-

lem of having discrepancies in measurement values for different

channels of the switching matrix by allowing channel compensa-

tion 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)1. 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 instru-

ment 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 card1.

The memory card1system is completely

electronic and is based on EEPROM.

Customized test frequencies

Inserting the memory card1

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 4284A1

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 4285A2, 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 program-

ming 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 fm) Ω±10% @ 1 MHz, ±30% @ 30 MHz,

fm= 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 m Vrms to 2 Vrms ±(10% + 1 mVrms)

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

Constant V 10 m Vrms 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 m Vrms to 20 Vrms ±(10% + 1 mVrms)

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

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

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

Specifications continued on page 11

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