MAX1512ETA+-MAX1512ETA+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX1512ETA+ ,EEPROM-Programmable TFT VCOM CalibratorELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, V = 3V, V = 10V, V = 5V, R = 30.1kΩ , T ..
MAX1512ETA+T ,EEPROM-Programmable TFT VCOM CalibratorFeaturesThe MAX1512 is a programmable VCOM-adjustment♦ 7-Bit Adjustable Sink-Current Outputsolution ..
MAX1513ETP ,2.7 to 5.5 V, TFT-LCD power-supply controllerFeatures♦ 2.7V to 5.5V Input Supply RangeThe MAX1513/MAX1514 provide complete power-sup-ply solutio ..
MAX1513ETP+ ,TFT-LCD Power-Supply ControllersFeatures♦ 2.7V to 5.5V Input Supply RangeThe MAX1513/MAX1514 provide complete power-sup-ply solutio ..
MAX1513ETP+T ,TFT-LCD Power-Supply ControllersELECTRICAL CHARACTERISTICS(Circuit of Figure 1, V = 3V, V = 10V, SDFR = IN, C = 0.22µF, T = 0°C to ..
MAX1515ETG ,+1.3 V to +3.6 V, Low-voltage, internal switch, step-down/DDR regulatorfeatures dual internal♦ 1MHz Maximum Switching Frequencyn-channel MOSFET power switches for high ef ..
MAX4162EUK-T ,SOT23, Micropower, Single-Supply, Rail-to-Rail I/O Op AmpsFeaturesThe MAX4162/MAX4163/MAX4164 are single/dual/quad, ♦ UCSP Package (MAX4163)micropower operat ..
MAX4163ESA ,SOT23 / Micropower / Single-Supply / Rail-to-Rail I/O Op AmpsFeaturesThe MAX4162/MAX4163/MAX4164 are single/dual/quad,' 5-Pin SOT23 Package (MAX4162)micropower ..
MAX4163ESA ,SOT23 / Micropower / Single-Supply / Rail-to-Rail I/O Op AmpsFeaturesThe MAX4162/MAX4163/MAX4164 are single/dual/quad,' 5-Pin SOT23 Package (MAX4162)micropower ..
MAX4163ESA+ ,SOT23, Micropower, Single-Supply, Rail-to-Rail I/O Op AmpsMAX4162/MAX4163/MAX416419-1195; Rev 3; 1/10UCSP, Micropower, Single-Supply, 10V,Rail-to-Rail I/O Op ..
MAX4163ESA+T ,SOT23, Micropower, Single-Supply, Rail-to-Rail I/O Op AmpsELECTRICAL CHARACTERISTICS: 3V Operation(V = 3V, V = 0V, V = V /2, V = V /2, R connected to V /2, T ..
MAX4163ESA+T ,SOT23, Micropower, Single-Supply, Rail-to-Rail I/O Op AmpsMAX4162/MAX4163/MAX416419-1195; Rev 3; 1/10UCSP, Micropower, Single-Supply, 10V,Rail-to-Rail I/O Op ..

MAX1512ETA+-MAX1512ETA+T
EEPROM-Programmable TFT VCOM Calibrator
General Description
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.
Applications
LCD Panels
Notebook Computers
Monitors
LCD TVs
Features7-Bit Adjustable Sink-Current OutputResistor-Adjustable Full-Scale RangeGuaranteed Monotonic Output Over Operating
RangeSingle-Wire Adjustment and Programming*EEPROM Stores VCOM SettingInterface Enable/Disable Control (CE)2.6V to 3.6V Logic Supply-Voltage Operating
Range (VDD)4.5V to 20V Analog Supply-Voltage Range (VAVDD)VDDUVLO Protection8-Pin 3mm x 3mm TDFN (0.8mm max)
MAX1512
EEPROM-Programmable TFT VCOM Calibrator
CTL
AVDD
RSET
OUT
VCOM
SET
GND
VDD
VDD
AVDD
MAX1512
Pin Configuration
Ordering Information
SET
CTL
VDDGND
N.C.
AVDD
OUT
MAX1512
TDFN
TOP VIEW
A "+" SIGN WILL REPLACE THE FIRST PIN INDICATOR ON LEAD-FREE PACKAGES.
Typical Operating Circuit
19-2911 Rev 3; 8/06
PARTTEMP RANGEPIN-PACKAGE
MAX1512ETA-40°C to +85°C8 TDFN 3mm x 3mm
MAX1512ETA+-40°C to +85°C8 TDFN 3mm x 3mm
EVALUATION KIT
AVAILABLE
*Patent Pending.
+Denotes lead-free package.
MAX1512
EEPROM-Programmable TFT VCOM Calibrator
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, VDD= 3V, VAVDD= 10V, VOUT= 5V, RSET= 30.1kΩ, TA= 0°C to +85°C, unless otherwise noted. Typical values
are at TA= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
VDD, SET, CE to GND...............................................-0.3V to +4V
OUT to GND...........................................................-0.3V to +14V
AVDD to GND.........................................................-0.3V to +24V
CTL to GND............................................................-0.3V to +16V
Continuous Power Dissipation (TA= +70°C)...............................
8-Pin Thin QFN 3mm x 3mm (derate 24.4mW/°C
above +70°C).............................................................1951mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10s).................................+300°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
SINK-CURRENT ADJUSTMENT
SET Voltage Resolution7Bits
SET Differential NonlinearityGuaranteed monotonic-1+1LSB
SET Zero-Scale Error-1+1+2LSB
SET Full-Scale Error-12+12LSB
SET CurrentISET120µA
To GND, VAVDD = 20V10200SET External Resistance (Note 2)RSETTo GND, VAVDD = 4.5V2.2545.00kΩ
VSET / VAVDD Voltage RatioDAC full scale0.05V/V
VSET / VAVDD Factory-Set Voltage
Ratio0.0240.0250.026V/V
VDD SUPPLY
VDD Supply RangeVDD2.63.6V
CE = VDD3255VDD Supply CurrentIDDCE = GND1220µA
Rising edge2.22.52.7VDD Power-On Reset ThresholdFalling edge2.12.42.6V
VDD Power-On Reset Hysteresis100mV
CONTROL AND PROGRAMMING
CE Input Low Voltage2.6V < VDD < 3.6V0.4V
CE Input High Voltage2.6V < VDD < 3.6V1.6V
CE Startup Time(Note 3)1ms
CTL High Voltage2.6V < VDD < 3.6V0.70 x VDD0.82 x VDDV
CTL Float Voltage2.6V < VDD < 3.6V0.40 x VDD0.62 x VDDV
CTL Low Voltage2.6V < VDD < 3.6V0.20 x VDD0.32 x VDDV
CTL Rejected Pulse Width20µs
CTL Minimum Pulse Width200µs
CTL Minimum Time Between
Pulses10µs
CTL = GND-10CTL Input CurrentµA
MAX1512
EEPROM-Programmable TFT VCOM Calibrator
ELECTRICAL CHARACTERISTICS
(VDD= 3V, VAVDD= 10V, VOUT= 5V, RSET= 30.1kΩ, TA= -40°C to +85°C, unless otherwise noted.) (Note 1)
Note 1:Limits are 100% production tested at TA= +25°C. Limits over the operating temperature range are guaranteed through
correlation using standard quality control (SQC) methods.
Note 2:SET external resistor range is verified at DAC full scale.
Note 3:Guaranteed by design. Not production tested.
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, VDD= 3V, VAVDD= 10V, VOUT= 5V, RSET= 30.1kΩ, TA= 0°C to +85°C, unless otherwise noted. Typical values
are at TA= +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
CTL EEPROM Program VoltageVPP(Note 3)15.2515.515.75V
OUTPUT VOLTAGE
OUT Leakage CurrentVDD = 2.1V1nA
OUT Settling TimeTo ±0.5 LSB error band20µs
VOUT Voltage RangeVOUTVSET + 0.5V13V
AVDD SUPPLY
VAVDD Supply RangeVAVDD4.520.0V
VDD = 2.1V, VAVDD = 20V0.04AVDD Operating CurrentIAVDDVAVDD = 20V1020µA
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
SINK-CURRENT ADJUSTMENT
SET Differential NonlinearityGuaranteed monotonic-1+1LSB
SET Zero-Scale Error-1+2LSB
SET Full-Scale Error-12+12LSB
SET CurrentISET120µA
To GND, VAVDD = 20V10200SET External Resistance (Note 2)RSETTo GND, VAVDD = 4.5V2.2545.00kΩ
VDD SUPPLY
VDD Supply RangeVDD2.63.6V
CE = VDD55VDD Supply CurrentIDDCE = GND20µA
Rising edge2.22.7VDD Power-On Reset ThresholdFalling edge2.12.6V
CONTROL AND PROGRAMMING
CE Input Low Voltage2.6V < VDD < 3.6V0.4V
CE Input High Voltage2.6V < VDD < 3.6V1.6V
AVDD SUPPLY
VAVDD Supply RangeVAVDD4.520.0V
AVDD Operating CurrentIAVDDVAVDD = 20V20µA
MAX1512
EEPROM-Programmable TFT VCOM Calibrator
Typical Operating Characteristics
(Circuit of Figure 1, VDD= 3V, VAVDD= 10V, VOUT= 5V, RSET= 24.9kΩ, TA= +25°C, DAC half scale, unless otherwise noted.)
VDD SUPPLY CURRENT
vs. TEMPERATURE
MAX1512 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (6020400-20
CE = VDD = 3V
VDD SUPPLY CURRENT vs. VDD
MAX1512 toc02
VDD (V)
SUPPLY CURRENT (
RISING
FALLING
CE = VDD
IOUT vs. RSET
MAX1512 toc03
RSET (kΩ)
IOUT
10,000
VAVDD = 20V
VAVDD = 4.5V
VDD = VOUT = 3V
IOUT SINK-CURRENT ERROR vs. VDD
MAX1512 toc04
VDD (V)
IOUT
SINK-CURRENT ERROR (LSB)
IOUT SINK-CURRENT ERROR vs. VAVDD
MAX1512 toc05
VAVDD (V)
IOUT
SINK-CURRENT ERROR (LSB)
IOUT SINK-CURRENT ERROR vs. VOUT
MAX1512 toc06
VOUT (V)
IOUT
SINK-CURRENT ERROR (LSB)
IOUT SINK-CURRENT ERROR
vs. TEMPERATURE
MAX1512 toc07
TEMPERATURE (°C)
IOUT
SINK-CURRENT ERROR (LSB)6040200-20
-40
MAX1512
EEPROM-Programmable TFT VCOM Calibrator
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VDD= 3V, VAVDD= 10V, VOUT= 5V, RSET= 24.9kΩ, TA= +25°C, DAC half scale, unless otherwise noted.)
TOTAL UNADJUSTED ERROR
vs. DAC SETTING
MAX1512 toc08
DAC SETTING
TOTAL UNADJUSTED ERROR (LSB)
RSET = 25kΩ
RSET = 100kΩ
INTEGRAL NONLINEARITY
vs. DAC SETTING
MAX1512 toc09
DAC SETTING
INTEGRAL NON-LINEARITY (LSB)
RSET = 100kΩ
RSET = 25kΩ
DIFFERENTIAL NONLINEARITY
vs. DAC SETTING
MAX1512 toc10
DAC SETTING
DIFFERENTIAL NON-LINEARITY (LSB)
AVDD POWER-UP RESPONSE
MAX1512 toc11
VAVDD
10V/div
40μs/div
VOUT
1V/div
VDD
2V/div
COUT = 100pF
VDD POWER-UP RESPONSE
MAX1512 toc12
40μs/div
10V
VDD
2V/div
VOUT
VAVDD
COUT = 100pF
SINGLE LSB STEP-UP RESPONSE
MAX1512 toc13
VOUT
5mV/div
40μs/div
VCTL
COUT = 100pF
SINGLE LSB STEP-DOWN RESPONSE
MAX1512 toc14
VOUT
5mV/div
40μs/div
VCTL
COUT = 100pF
MAX1512
EEPROM-Programmable TFT VCOM Calibrator
Detailed Description
The MAX1512 is a solid-state alternative to mechanical
potentiometers used for adjusting the LCD backplane
voltage (VCOM) in TFT LCD displays. The MAX1512
attaches to an external resistive voltage-divider and
sinks a programmable current (IOUT), which sets the
VCOM level (Figure 1). An internal 7-bit DAC controls
the sink current and allows the user to increase or
decrease the VCOM level (Figure 2). The DAC is ratio-
metric relative to AVDD and is monotonic over all oper-
ating conditions. The user can store the DAC setting in
an internal EEPROM. On power-up, the EEPROM pre-
sets the DAC to the last stored setting. The single-wire
interface between the LCD panel and the programming
circuit adjusts the DAC, programs the EEPROM, and
provides programming power.
The resistive voltage-divider and the AVDD supply set
the maximum value of VCOM. The MAX1512 sinks cur-
rent from the voltage-divider to reduce the VCOM level.
The external resistor RSETsets the full-scale sink cur-
rent and the minimum value of VCOM.
Pin Description
PINNAMEFUNCTIONOUT
Adjustable Sink-Current Output. OUT connects to the resistive voltage-divider between AVDD and GND that
sets the VCOM voltage. IOUT lowers the divider voltage by an adjustable amount. See the SET pin
description.AVDDHigh-Voltage Analog Supply. Connects to the panel source-driver supply rail.N.C.No Connect. Not internally connected.GNDGround
5VDDSupply Input. +2.6V to +3.6V input range.CTL
VCOM Adjustment and EEPROM Programming Control. CTL sets the internal DAC code and programs the
EEPROM. A pulse-control method is used to adjust the VCOM level. See the VCOM Adjustment (CTL)
section. To program the DAC setting into the EEPROM as the power-on default, drive CTL to the EEPROM
programming voltage using the correct timing and voltage ramp rates. See the EEPROM Programming
(CTL) section.
7CEControl Interface Enable. Connect CE to VDD to enable the CTL input. Connect CE to GND to disable the
CTL input and reduce the supply current.SET
Full-Scale Sink-Current Adjustment Input. Connect a resistor, RSET, from SET to GND to set the full-scale
adjustable sink current. The full-scale adjustable sink current is equal to:
IOUT is equal to the current through RSET.
CTL
AVDD
RSET
25kΩ
OUT
245kΩ
200kΩ
VCOM
SET
GND
VDD
VDD
AVDD
10V
MAX1512
Figure 1. Standard Application Circuit
AVDD
SET20 ×⎜⎞⎟
MAX1512
EEPROM-Programmable TFT VCOM Calibrator
Setting the VCOM
Adjustment Range (RSET)
The external resistive voltage-divider sets the maximum
value of the VCOM adjustment range. RSETsets the
full-scale sink current, IOUT, which determines the mini-
mum value of the VCOM adjustment range. Large RSET
values increase resolution but decrease the VCOM
adjustment range. Calculate R1, R2, and RSETusing
the following procedure:Choose the maximum VCOM level (VMAX), the mini-
mum VCOM level(VMIN), and the AVDD supply
voltage(VAVDD).Calculate the R1 / R2 ratio:Calculate the R1 / RSETratio:Choose RSETaccording to the limits shown in the
Electrical Characteristicssection and calculate the
values for R1 and R2.The resulting resolution is:
A complete design example is given below:VMAX= 5V, VMIN= 3V, VAVDD= 10VIf RSET= 24.9kΩ, then R1 = 200kΩand R2 =
200kΩResolution = 15.75mV120538) RSET=×()=-11) R≅=-1 solutionV=()MAXMIN-V
127SETMAX20 ≅()×MAXMIN-V
AVDD
MAX1 ≅-
CTL
CTL
AVDD
RSET
OUT19R
DAC
EEPROM
VCOM
SET
GND
VDD
VDD
AVDD
MAX1512
CONTROL
INTERFACE
Figure 2. Simplified Functional Diagram

Partno	Mfg	Dc	Qty	Available	Descript
MAX1512ETA+ \|MAX1512ETA	MAXIM	N/a	7800	avai	EEPROM-Programmable TFT VCOM Calibrator
MAX1512ETA+T \|MAX1512ETAT	MAX	N/a	5000	avai	EEPROM-Programmable TFT VCOM Calibrator