MAX1512ETA+T Maxim Integrated Products, MAX1512ETA+T Datasheet

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MAX1512ETA+T

Manufacturer Part Number
MAX1512ETA+T
Description
IC CALIBRATOR TFT VCOM 8-TDFN
Manufacturer
Maxim Integrated Products
Type
TFT VCOM Calibratorr
Datasheet

Specifications of MAX1512ETA+T

Applications
LCD TV/Monitor
Mounting Type
Surface Mount
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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 3; 8/06
*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
A "+" SIGN WILL REPLACE THE FIRST PIN INDICATOR ON LEAD-FREE PACKAGES.
EEPROM-Programmable TFT VCOM Calibrator
AVDD
GND
OUT
N.C.
________________________________________________________________ Maxim Integrated Products
3
4
1
2
General Description
MAX1512
TDFN
Pin Configuration
7
6
5
8
Applications
SET
CE
CTL
V
DD
♦ 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)
+Denotes lead-free package.
MAX1512ETA
MAX1512ETA+
Range
Range (V
DD
PART
UVLO Protection
CE
CTL
DD
MAX1512
GND
V
V
)
DD
DD
Typical Operating Circuit
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
AVDD
OUT
SET
Ordering Information
R
SET
AVDD
R1
R2
PIN-PACKAGE
8 TDFN 3mm x 3mm
8 TDFN 3mm x 3mm
Features
AVDD
VCOM
1
)

Related parts for MAX1512ETA+T

MAX1512ETA+T Summary of contents

Page 1

... TDFN A "+" SIGN WILL REPLACE THE FIRST PIN INDICATOR ON LEAD-FREE PACKAGES. *Patent Pending. ________________________________________________________________ Maxim Integrated Products 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. ♦ 7-Bit Adjustable Sink-Current Output ♦ Resistor-Adjustable Full-Scale Range ♦ ...

Page 2

EEPROM-Programmable TFT VCOM Calibrator ABSOLUTE MAXIMUM RATINGS V , SET GND...............................................-0.3V to +4V DD OUT to GND ...........................................................-0.3V to +14V AVDD to GND.........................................................-0.3V to +24V CTL to GND ............................................................-0.3V to +16V Continuous Power Dissipation (T = +70°C) ............................... ...

Page 3

EEPROM-Programmable TFT VCOM Calibrator ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 3V 10V AVDD are +25°C.) (Note 1) A PARAMETER SYMBOL CTL EEPROM Program Voltage OUTPUT VOLTAGE OUT Leakage Current OUT ...

Page 4

EEPROM-Programmable TFT VCOM Calibrator (Circuit of Figure 3V 10V AVDD V SUPPLY CURRENT DD vs. TEMPERATURE 33 33.0 32.8 32.6 32.4 32.2 32.0 31.8 31.6 31.4 -40 ...

Page 5

EEPROM-Programmable TFT VCOM Calibrator (Circuit of Figure 3V 10V AVDD TOTAL UNADJUSTED ERROR vs. DAC SETTING 25kΩ SET 100kΩ SET ...

Page 6

EEPROM-Programmable TFT VCOM Calibrator PIN NAME Adjustable Sink-Current Output. OUT connects to the resistive voltage-divider between AVDD and GND that 1 OUT sets the VCOM voltage. I description. 2 AVDD High-Voltage Analog Supply. Connects to the panel source-driver supply rail. ...

Page 7

EEPROM-Programmable TFT VCOM Calibrator CONTROL CTL INTERFACE CTL 7 Figure 2. Simplified Functional Diagram Setting the VCOM Adjustment Range (R The external resistive voltage-divider sets the maximum value of the VCOM adjustment range. R full-scale ...

Page 8

EEPROM-Programmable TFT VCOM Calibrator MECHANICAL POTENTIOMETER AVDD Ra Rb VCOM Rc Figure 3. Replacement of Mechanical/Potentiometer Circuit MECHANICAL POTENTIOMETER AVDD Rd Re VCOM Rf Figure 4. Replacement of Mechanical/Potentiometer Circuit Translating Existing Potentiometer Circuits Existing VCOM adjustment circuits using conventional ...

Page 9

EEPROM-Programmable TFT VCOM Calibrator PROGRAMMING CE CIRCUIT Figure 5. Optional Circuit to Drive CE >1ms CTL HIGH CTL CTL LOW DAC SETTING UNDEFINED VCOM Figure 6. VCOM Adjustment _______________________________________________________________________________________ The ...

Page 10

EEPROM-Programmable TFT VCOM Calibrator To avoid unintentional VCOM adjustment, the MAX1512 is guaranteed to reject CTL pulses shorter than 20µs. In addition, to avoid the possibility of a single false pulse caused by power-up sequencing between V CTL, the very ...

Page 11

EEPROM-Programmable TFT VCOM Calibrator USER µC INTERFACE V PP Figure 8. Conceptual Programming Circuit Applications Information The VCOM adjustment and the EEPROM programming must be performed with an external programming cir- cuit. Refer to the MAX1512 evaluation kit for a ...

Page 12

EEPROM-Programmable TFT VCOM Calibrator (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 12 ______________________________________________________________________________________ Package Information PACKAGE OUTLINE, 6,8,10 & 14L, TDFN, EXPOSED PAD, 3x3x0.80 ...

Page 13

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 13 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2006 Maxim Integrated Products ...

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