ISL45042EVAL1Z Intersil, ISL45042EVAL1Z Datasheet

ISL45042EVAL1Z

Manufacturer Part Number

ISL45042EVAL1Z

Description

EVAL BOARD 1 FOR ISL45042

Manufacturer

Intersil

Datasheets

1.ISL45042IRZ.pdf (9 pages)

2.ISL45042EVAL1Z.pdf (5 pages)

Specifications of ISL45042EVAL1Z

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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Description

The ISL45042EVAL1Z is a RoHS compliant evaluation

board for the ISL45042, LCD Module Calibrator. For detailed

information on the ISL45042, reference the ISL45042 data

sheet (FN6072). Additionally, for detailed information on the

dual low noise Amplifier, please refer to the EL5220 data

sheet (FN7186).

The ISL45042EVAL1Z is designed to operate from an AVDD

supply (5V to 20V), and VDD supply (2.6V to 3.6V).

Jumpers

The evaluation board is configured with several jumpers.

The jumpers enable the user to easily perform several

different tests. The board is configured from the factory with

the data sheet external components and the output amplifier

connected. Reference Figure 3 for jumper location relative to

the circuit schematic.

J1 is the test header output. J1 provides easy access to:

ISL45042 output, EL5220 output, +10V supply, GND, +3V

supply, CTL pin and the SET pin.

J2 and J3 provide power and input signal to the EL5220

respectively. Removing both jumpers will enable the user to

evaluate the output of the ISL45042 by itself.

J4 enables and disables operation of the ISL45042. To

enable operation, set J4 into position 1-2. This will pull the

CE pin high. To disable operation, set J4 into position 2-3.

This will pull the CE pin low.

J5, J6 and J7 allow the user to choose different resistor

values than the ones already set on the board (for the

biasing resistors and R

J8 and J9 enable independent measurement of the

ISL45042 VDD (+3V) and AVDD (+10V) supply currents.

Operation

The ISL45042 provides an output sink current which is

converted to a voltage via the external voltage divider. The

equations that control the output voltage are given in

Equation 1 and Equation 2. Figure 2 defines R1, R2 and

output voltages for the following conditions: R1 = 200kΩ, R2

= 243kΩ, R

NOTE: Where “Setting” is an integer between 1 and 128.

OUT

SET

used in Equation 1 and Equation 2. Table 1 lists the

Setting

-------------------- - X

⎛

⎝

--------------------- -

128

SET

= 24.9kΩ and AVDD = 10V.

-------------------------- -

20 R

⎞ AVDD 1 Setting

⎠

AVDD

(

SET

⎛

⎝

)

–

-------------------- - X

128

Application Note

-------------------------- -

20 R

(

SET

)

⎞

⎠

(EQ. 1)

(EQ. 2)

1-888-INTERSIL or 1-888-468-3774

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

ISL45042EVAL1Z User’s Manual

Switches

There are three switches on the board. Reference Figure 1

for the location of switches on the board, and Figure 3 for

switch location relative to the circuit schematic.

S1 is the EEPROM Program switch that supplies AVDD level

voltage to the ISL45042 CTL pin. Any level over 4.9V on

CTL pin will program the current counter value to the

EEPROM.

S2 is the decrement switch that will cause the output voltage

S3 is the increment switch that will cause the output voltage

CE pin has to be active high, (jumper J4 in the position 1-2)

in order for the increment/decrement switches to have the

effect on the output voltage. Also, CE has to be high in order

to program the EEPROM.

Taking the CE pin low (inactive) will reset the counter to the

last EEPROM programmed value.

Note: the 0Ω resistor (Figure 3, R2) makes the EL5220 a

buffer. If other functionality is desired, please replace R2 with

the desired value.

Using the ISL45042EVAL1Z Board

Please make sure that the power supplies are connected

properly.

Set the J4 jumper to a position 1-2 to enable the CE, and

allow the counter to move. Use S2 and S3 switches to move

the counter values (decrement and increment the counter).

As long as the CE is active, the counter value should remain

at the position chosen. The output levels (current/voltage)

can be measured at the J1 test header.

When the desired counter value is reached, use the S1,

PROG EEPROM, switch to write the value to the

Non-Volatile EEPROM.

If the value is not written to the EEPROM, and the CE is

pulled low, the counter will reset to the last programmed

value.

The output of the ISL45042 could be observed at the J1 test

header, pin 2 (when EL5220 disabled with J2 and J3 taken

out). Otherwise, the output could be fed to the EL5220 and

then the output of the Amplifier (buffer) observed at the pin 1

of J1.

OUT

October 4, 2006

EL5220 or V

All other trademarks mentioned are the property of their respective owners.

Intersil (and design) is a registered trademark of Intersil Americas Inc.

OUT

ISL45042) to increase its value.

ISL45042) to decrease its value.

AN1188.2

Related parts for ISL45042EVAL1Z

ISL45042EVAL1Z Summary of contents

Page 1

... ISL45042, reference the ISL45042 data sheet (FN6072). Additionally, for detailed information on the dual low noise Amplifier, please refer to the EL5220 data sheet (FN7186). The ISL45042EVAL1Z is designed to operate from an AVDD supply (5V to 20V), and VDD supply (2.6V to 3.6V). Jumpers The evaluation board is configured with several jumpers. ...

Page 2

... ISL45042EVAL1Z Picture TEST-- INPUT/OUTPUT HEADER J2: EL5220 POWER EL5220 OP AMP J3: EL5220 + INPUT NOTES: Jumpers J5, J6 and J7 allow user to choose different values of biasing and R Jumpers J8 and J9 allow user to measure current draw of the ISL45042. 2 Application Note 1188 VDD, AVDD AND GND CABLES PROGRAM EEPROM resistors ...

Page 3

... ISL45042EVAL1Z Block Diagram EL5220 OUT AMPLIFIER NOT USED TABLE 1. SETTING (INTEGER BETWEEN 1 AND 128 100 111 122 128 3 Application Note 1188 AVDD RANGE 15V R1 200kΩ R2 243kΩ X 0Ω I OUT FIGURE 2. SIMPLIFIED APPLICATION SCHEMATIC V OUT 5.468 5.2788 5.0894 4.9001 4.7108 4 ...

Page 4

... ISL45042EVAL1Z Schematics EL5220 V EL5220 OUT V ISL45042 OUT +10V GND +3V CTL V SET FIGURE 3. EVAL BOARD SCHEMATIC ...

Page 5

... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 5 Application Note 1188 TABLE 2. ISL45042EVAL1Z BOM QUAN. VALUE TOL. POWER PACKAGE 1 THOLE ...

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