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Data Sheet

FULL DATA SHEET (PDF, 288kB) Download   E-Mail

Description

The MAX8738 is an I²C-programmable VCOM-adjustment solution for thin-film transistor (TFT) liquid-crystal displays (LCDs). The MAX8738 simplifies the labor-intensive VCOM-adjustment process and replaces mechanical potentiometers, which significantly reduces labor costs, increases reliability, and enables automation. The MAX8738 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 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 MAX8738 features a 2-wire I²C interface for DAC-adjustment commands and EEPROM programming. The interface utilizes the existing I²C bus on the LCD panel connector so no additional panel connector pins are required. The MAX1512 is a similar product with 1-wire interface and is recommended for applications with no existing I²C interface. The MAX8738 is available in an 8-pin µMAX® package. A complete evaluation kit is available to simplify evaluation and production development.

Key Features		Applications/Uses
7-Bit Adjustable Sink-Current Output Resistor-Adjustable, Full-Scale Range Guaranteed Monotonic Output Over Operating Range 2-Wire I²C Interface EEPROM Stores VCOM Setting 4.5V to 20V Analog Supply Voltage Range (VAVDD) 60µA (max) AVDD Supply Current 16.1V to 28V EEPROM Programming Supply Voltage Range (VHV) <1µA HV Supply Current (Not in Program Mode) 8-Pin µMAX		Display Products LCD Panels LCD TVs Notebook Computers

Diagram

Typical Operating Circuit

Evaluation Kits

MAX8738EVKIT

Reliability Reports

Show FIT data for: MAX8738 Request Reliability Report for: MAX8738

Software/Models

none

Ordering Information
Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices: 1-4 of 4
MAX8738	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX8738EUA			uMAX;8 pin; Dwg: 21-0036 (PDF) Use pkgcode/variation: U8-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX8738EUA+			uMAX;8 pin; Dwg: 21-0036 (PDF) Use pkgcode/variation: U8+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX8738EUA+T				-40°C to +85°C	See data sheet
MAX8738EUA-T				-40°C to +85°C	See data sheet

More Information

New Product Press Release 2005-04-21

Related Products

MAX1512, MAX1512ETA EEPROM-Programmable TFT VCOM Calibrator

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