Datasheet

TEK.COM

4

Built-In Test Sequencer (Source Memory List)

The Source Memory list provides faster and easier testing

by allowing you to setup and execute up to 100 different

tests that run without PC intervention.

• Stores up to 100 instrument configurations, each

containing source settings, measurement settings,

pass/fail criteria, etc.

• Pass/fail limit test as fast as 500 µs per point

• Onboard comparator eliminates the delay caused

when sending data to the computer for analysis

• Built-in, user definable math functions to calculate

derived parameters

Test 3

Test 2

V

I

Test 1

Test Pass/Fail Test If Passes Test

If Fails Test

Test

1

Check V

F1

at 100 mA

against pass/

fail limits

Go to Test 2

1. Bin part to

bad bin

2. Transmit data

to computer

while handler

is placing

new part

3. Return to

Test 1

Test

2

Check V

1 A against

pass/fail limits

Go to Test 3

Test

3

Check leakage

current at

–500 V and

test against

pass/fail limits

1. Bin part to good bin

2. Transmit readings

to computer while

handler is placing

new part

3. Return to Test 1

Example test sequence

Digital I/O Interface

The digital I/O interface can link a SourceMeter SMU

instrument to many popular component handlers,

including Aetrium, Aeco, and Robotronics. Other

capabilities of the interface include:

• Tight systems integration for applications such as

binning and sorting

• Built-in component handler interface

• Start of test and end of test signals

• 5 V, 300 mA power supply

• Optional expander accessory (2499-DIGIO) adds 16

digital I/O lines

The digital I/O interface is available on all Series 2400

SoourceMeter instruments except the 2401.

Trigger Link Interface

All SourceMeter SMU instruments include Keithley’s

unique Trigger Link interface, which provides high-speed,

seamless communications with many of Keithley’s other

instruments independent of a computer and GPIB.

Unique 6-Wire Ohms Technique

SourceMeter SMU instruments can make standard 4-wire,

split Kelvin, and 6-wire, guarded ohms measurements

and can be configured for either the constant current or

constant voltage method. The 6-wire ohms technique:

• Uses guard and guard sense leads in addition to the

4-wire sense and source leads.

• Locks out parallel current paths when measuring

resistor networks or hybrid circuits to isolate the

component under test.

• Allows users to configure and plot data easily from

Series 2400 SourceMeter SMU instruments, making

characterization of two, three, and four terminal

devices a snap.

+

-

GUARD

GUARD SENSE

IN/OUT HI

SENSE HI

SENSE LO

IN/OUT LO

DUT

R2

R1

R3

6-Wire Ohms Circuit. All test current flows through R1 because the high

current guard drives the voltage across R2 to 0 V.