Peak Atlas DCA Pro Manuel utilisateur

Advanced Semiconductor Component Analyser

with Graphics Display and PC connectivity

Model DCA75

Peak Atlas DCA Pro

EN 875-1.

©Peak Electronic Design Limited 2012/2022

In the interests of development, information in this guide is subject to change without notice - E&OE

User Guide

Designed and manufactured with pride in the UK

electronic design ltd

Peak Atlas DCA Pro User Guide October 2022  Rev 1.8

Page 2

Want to use it now?

We understand that you want to use your Peak Atlas DCA Pro right

now. The unit is ready to go and you should have little need to refer

to this user guide, but please make sure that you do at least take a

look at the notices on page 5.

Contents Page

Introduction.....................................................................................4

Important Considerations................................................................5

Analysing Semiconductors - Standalone mode ..............................6

Diodes.......................................................................................8

Zener Diodes ............................................................................9

Diode Networks......................................................................10

LEDs.......................................................................................11

Bicolour LEDs (2-lead types).................................................12

Bicolour LEDs (3-lead types).................................................13

Bipolar Junction Transistors (BJTs).......................................14

Darlington Transistors ............................................................18

Digital Transistors ..................................................................21

Enhancement Mode MOSFETs..............................................22

Depletion Mode MOSFETs....................................................23

Enhancement Mode IGBTs ....................................................24

Depletion Mode IGBTs ..........................................................25

Junction FETs (JFETs) ...........................................................26

Thyristors (SCRs) and Triacs .................................................28

Voltage Regulators .................................................................29

Contents continued on next page

Peak Atlas DCA Pro User Guide October 2022  Rev 1.8

Page 3

Contents (continued) Page

PC Software Installation ............................................................30

Windows XP Installation........................................................31

Windows Vista, 7, 8 and 10 Installation.................................32

Running the DCA Pro software for the first time.........................33

Analysing Semiconductors  PC mode ........................................34

PC mode - Curve Tracing functions.......................................35

PC mode - Exporting your data ..............................................36

PC mode - Special functions ..................................................37

Audible Settings............................................................................38

Care of your Peak Atlas DCA Pro ...............................................39

Appendix A - Troubleshooting .....................................................40

Appendix B - General Technical Specifications...........................41

Appendix C - Component Testing Specifications ........................42

Appendix D - Analysis test circuits ..............................................44

Transistor test circuit ..............................................................44

JFET/MOSFET/IGBT test circuit ..........................................45

Diode test circuit.....................................................................46

Voltage regulator test circuit ..................................................47

Appendix E - Warranty Information.............................................48

Appendix F - Disposal information ..............................................48

Peak Atlas DCA Pro User Guide October 2022  Rev 1.8

Page 4

Introduction

The Peak Atlas DCA Pro is an advanced semiconductor analyser that

combines simplicity, ease of use and a range of advanced features. You can

use your DCA Pro on its own or in combination with a laptop or desktop PC.

Summary Features:

·Automatic component type identification and schematic display:

Bipolar transistors, Darlington transistors and Digital transistors.

Enhancement Mode and Depletion Mode MOSFETs.

Enhancement Mode and Depletion Mode IGBTs.

Junction FETs (including SiC normally off types).

Low power sensitive Triacs and Thyristors.

Light Emitting Diodes including Bicolour LEDs (2 and 3 leads).

Diodes and Diode networks.

Zener diodes (<~11V).

Voltage regulators (<~8V).

·Automatic pinout identification, just connect any way round.

·Special feature identification such as free-wheeling diodes and

resistor shunts.

·Gain measurement for bipolar transistors.

·Leakage current measurement for bipolar transistors.

·Silicon and Germanium detection for bipolar transistors.

·Gate threshold and transconductance measurement for MOSFETs,

JFETs and IGBTs.

·Semiconductor forward voltage measurement for diodes, LEDs and

transistor Base-Emitter junctions.

·Zener voltage measurement.

·Voltage regulator drop-out measurement.

·PC connectivity providing:

Larger component identification display.

Detailed characteristics measurement.

Curve tracing functions.

·Single alkaline AAA cell (not used when USB connected).

·Automatic and manual power-off.

Peak Atlas DCA Pro User Guide October 2022  Rev 1.8

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Important Considerations

Please observe the following guidelines:

·This instrument must NEVER be connected to powered

equipment/components or equipment/components with any

stored energy (e.g. charged capacitors). Failure to comply with

this warning may result in personal injury, damage to the

equipment under test, damage to your DCA Pro and

invalidation of the manufacturers warranty.

·The DCA Pro is designed to analyse semiconductors that are

not in-circuit, otherwise complex circuit effects will result in

erroneous measurements.

·Large voltage differences between true earth and your PCs

USB port can result in damage. The device under test should

therefore have no path to earth or other supplies.

·Avoid rough treatment, hard knocks and extreme temperatures.

·This unit is not waterproof.

·Only use a good quality AAA Alkaline or Lithium-Iron-

Disulphide cell. Input supply rated up to 1.9V.

Peak Atlas DCA Pro User Guide October 2022  Rev 1.8

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Analysing Semiconductors  Standalone mode

The DCA Pro is designed to analyse discrete,

unconnected, unpowered components.

This ensures that external connections dont

influence the measured parameters. The three test

probes can be connected to the component any way round.

If the component has only two terminals, then any pair of the three

test probes can be used.

The DCA Pro will start component analysis when the on-test button is

pressed.

For the first analysis, the tests are

performed while displaying the Peak

logo (no time is wasted while

displaying the logo).

For subsequent testing when the unit is

already powered-up, the unit displays

the Testing screen.

Depending on the component type, analysis may take a few seconds to

complete, after which, the results of the analysis are displayed.

Information is displayed a page at a time, each page can be smoothly

scrolled by briefly pressing the scroll-off button.

Although the

DCA Pro

will switch itself off if left unattended, you can

manually switch the unit off by holding down the

scroll-off

button for

a couple of seconds.

Peak Atlas DCA Pro User Guide October 2022  Rev 1.8

Page 7

If the DCA Pro cannot detect any

supported component between any of

the test probes, the following message

will be displayed:

If the component is not a supported

component type, a faulty component or

a component that is being tested in-

circuit, the analysis may result in the

following message being displayed:

Some components may be faulty due

to a shorted junction between a pair of

the probes. If this is the case, the

following message (or similar) will be

displayed:

If all three probes are shorted (or very

low resistance) then the following

message will be displayed:

It is possible that the

DCA Pro

may detect one or more diode junctions

or other component type within an unknown or faulty part. This is

because many semiconductors comprise of PN (diode) junctions.

Please refer to the section on diodes and diode networks for more

information.

Peak Atlas DCA Pro User Guide October 2022  Rev 1.8

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Diodes

The DCA Pro will analyse almost any type of diode. Any

pair of the three test clips can be connected to the diode, any way

round. If the unit detects a single diode, a message similar to the following

will be displayed:

In this example, the Cathode (symbol

of K) is connected to the Green test

clip and the Anode (symbol of A) is

connected to the Blue test clip,

additionally, the Red test clip is unconnected.

The forward voltage drop is also displayed; this gives an indication of the

diode technology. In this example, it is likely that the diode is a standard

silicon diode. A germanium or Schottky diode may yield a forward voltage of

about 0.25V. The current at which the diode was tested is also displayed.

Unlike most multimeters that dont have a defined diode test current, the

DCA Pro typically tests diodes (PN junctions) at a forward current of 5mA.

You can test at different currents by performing an I/V graph using the PC

software.

Note that the

DCA Pro

will detect only one diode even if two diodes

are connected in series when the third test clip is not connected to the

junction between the diodes. The forward voltage drop displayed

however will be the voltage across the whole series combination.

The

DCA Pro

will determine that the diode(s) under test is an LED if

the measured forward voltage drop exceeds 1.50V. This has no effect

on the readings displayed other than the LED message instead of Diode

message. Please refer to the section on LED analysis for more

information.

Peak Atlas DCA Pro User Guide October 2022  Rev 1.8

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Zener Diodes

The DCA Pro supports Zener diodes (and Avalanche

diodes). Additionally, the instrument can measure the Zener

voltage*.

Connect any pair of the 3 test leads to the Zener diode. Following analysis, the

component details are displayed.

In this example, a Zener diode with a

reverse voltage (Zener voltage) of

nearly 5.1V has been detected.

Additionally, the forward biased

voltage characteristic is measured,

0.702V at 5mA for this example.

The DCA Pro attempts to test the Zener diode with a current of nominally

5mA. For Zener diodes with a Zener voltage of more than about 7V, a lower

test current of 2mA or 1mA will be used. This is illustrated in the following

graph:

*The DCA Pro may not be able to identify Zener diodes with a Zener voltage

of more than 11V. It will however still identify the diode junction in its

forward biased mode.

Peak Atlas DCA Pro User Guide October 2022  Rev 1.8

Page 10

Diode Networks

The DCA Pro will identify multiple diode junctions

between the probes. For three terminal devices such as

SOT-23 diode networks, all three test clips must be

connected. The optional Peak Component Adapter for SOT-

23 parts (Peak model PCA23) can be useful for testing SOT-23 parts.

The instrument will describe the type

of diode network as text and as a

component schematic symbol. Types

of diode network supported include:

Series pair, Common Cathode and

Common Anode.

It will then show the pinout and the VF

specs for each diode in turn.

It can be seen in this example, that the blue test clip is connected to both the

anode on Diode #1 and to the cathode of Diode #2. This means that the two

diodes are effectively connected in series, with the blue clip at the mid point.

This example is illustrated below:

In the same way as the single diode analysis, the forward voltage for each

diode is measured for a nominal test current of 5mA.

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