ISL24211 datasheet(2/12 Pages) INTERSIL

Part #	ISL24211

Description	Programmable VCOM Calibrator with EEPROM and Output Buffer

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Manufacturer	INTERSIL [Intersil Corporation]

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ISL24211

2

FN7585.0

February 23, 2011

Block Diagram

Pin Configuration

ISL24211

(10 LD TDFN)

TOP VIEW

FIGURE 2. BLOCK DIAGRAM OF THE ISL24211

GND

I2C INTERFACE

DAC

REGISTERS

8-Bit EEPROM

SCL

SDA

WP

VDD

AVDD

SET

10

9

3

6

8

7

4

5

CS

DVR_OUT

2

1

Q1

A1

VCOM_OUT

INN

ANALOG DCP

AND

CURRENT SINK

VCOM BUFFER

AMPLIFER

A2

(*THERMAL PAD CONNECTS TO GND)

INN

DVR_OUT

AVDD

1

2

3

4

10

9

8

7

VCOM_OUT

SET

SCL

SDA

EXPOSED

THERMAL

PAD*

6 VDD

GND 5

WP

Pin Descriptions

NAME

NUMBER

FUNCTION

INN

1

Negative (inverting) input of the VCOM buffer op

amp. This pin is used to provide feedback from

the end point of the VCOM trace.

DVR_OUT

2

Adjustable Sink Current Output Pin. The current

sunk into the DVR_OUT pin is equal to the DAC

setting times the maximum adjustable sink

current divided by 256. See the “SET” pin

function description below (pin 9) for the

maximum adjustable sink current setting. Also

tied to the non-inverting input of buffer amp.

AVDD

3

Analog Power Supply Input. Bypass to GND

with 0.1µF capacitor.

WP

4

EEPROM Write Protect. Active Low.

0 = Programming disabled; 1 = Programming

allowed.

GND

5

Ground connection.

VDD

6

Digital power supply input. Bypass to GND with

0.1µF capacitor.

SDA

7

I2C Serial Data Input

SCL

8

I2C Clock Input

SET

9

Maximum Sink Current Adjustment Point.

Connect a resistor from SET to GND to set the

maximum adjustable sink current of the

DVR_OUT pin. The maximum adjustable sink

current is equal to (AVDD/20) divided by RSET.

VCOM_OUT

10

Output of the buffer amplifier

PAD

-

Thermal pad should be connected to system

ground plane to optimize thermal performance.

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