MAX1512 Maxim Integrated Products, MAX1512 Datasheet

MAX1512

Manufacturer Part Number

MAX1512

Description

EEPROM-Programmable TFT VCOM Calibrator

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX1512.pdf (12 pages)

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The MAX1512 is a programmable VCOM-adjustment

solution for thin-film transistor (TFT) liquid-crystal displays

(LCDs). The MAX1512 simplifies the labor-intensive

VCOM-adjustment process and replaces mechanical

potentiometers, which significantly reduces labor costs,

increases reliability, and enables automation.

The MAX1512 attaches to an external resistive voltage-

divider and sinks a programmable current to set the

VCOM voltage level. An internal 7-bit digital-to-analog

converter (DAC) controls the sink current. The DAC is

ratiometric relative to AVDD and is guaranteed to be

monotonic over all operating conditions. This VCOM

calibrator IC includes an EEPROM to store the desired

VCOM voltage level. The EEPROM can be programmed

repeatedly, giving TFT LCD manufacturers the flexibility

to calibrate the display panel as many times as the

manufacturing process requires.

The IC features a single-wire interface between the

LCD panel and the programming circuit. The single-

wire interface delivers both programming power and

DAC-adjustment commands to minimize changes to

panel connectors and production equipment. The

MAX1512 is available in an 8-pin 3mm x 3mm TDFN

package. A complete evaluation kit is available to sim-

plify evaluation and production development.

19-2911 Rev 2; 8/04

*Patent Pending.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

LCD Panels

Notebook Computers

Monitors

LCD TVs

TOP VIEW

EEPROM-Programmable TFT VCOM Calibrator

AVDD

GND

OUT

N.C.

________________________________________________________________ Maxim Integrated Products

General Description

MAX1512

TDFN

Pin Configuration

Applications

SET

CTL

♦ 7-Bit Adjustable Sink-Current Output

♦ Resistor-Adjustable Full-Scale Range

♦ Guaranteed Monotonic Output Over Operating

♦ Single-Wire Adjustment and Programming*

♦ EEPROM Stores VCOM Setting

♦ Interface Enable/Disable Control (CE)

♦ 2.6V to 3.6V Logic Supply-Voltage Operating

♦ 4.5V to 20V Analog Supply-Voltage Range (V

♦ V

♦ 8-Pin 3mm x 3mm TDFN (0.8mm max)

MAX1512ETA

Range

Range (V

PART

UVLO Protection

CTL

MAX1512

GND

)

Typical Operating Circuit

-40°C to +85°C

TEMP RANGE

AVDD

OUT

SET

Ordering Information

SET

AVDD

PIN-PACKAGE

8 TDFN 3mm x 3mm

Features

AVDD

VCOM

)

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