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Analog Devices Inc./Maxim Integrated MAX1512ETA+
- Part No.:
- MAX1512ETA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Video Processing
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
MAX1512ETA+.pdf
- Description:
- CONSUMER CIRCUIT
- Quantity:
- Payment:
- Shipping:
Inventory:823
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Product details
Overview
The MAX1512ETA+ from Maxim Integrated is an EEPROM-programmable TFT VCOM calibrator IC designed to replace mechanical potentiometers in LCD panel backplane voltage adjustment. It features a 7-bit ratiometric DAC, single-wire CTL interface for VCOM tuning and EEPROM programming, and operates with 2.6V–3.6V logic supply (VDD) and 4.5V–20V analog supply (AVDD), enabling automated calibration in notebook computers and LCD monitors.
For engineers reviewing the MAX1512ETA+ datasheet, MAX1512ETA+ pinout, MAX1512ETA+ application, or MAX1512ETA+ equivalent, key selection criteria include sink-current monotonicity, EEPROM retention across temperature, single-wire programming compatibility, RSET-based full-scale current scaling, and TDFN-8 package integration into space-constrained display modules.
Technical Context
The MAX1512ETA+ implements a ratiometric 7-bit DAC whose output sink current (IOUT) scales linearly with AVDD and is set via external resistor RSET (2.25kΩ–45kΩ). Its monotonic performance is guaranteed over -40°C to +85°C, and DAC code persistence relies on internal EEPROM programmed via controlled CTL voltage ramping to 15.5V ±0.25V.
Control logic uses CE to enable/disable the CTL interface, reducing VDD current from 32µA (CE = VDD) to 12µA (CE = GND). VCOM adjustment occurs through >200µs high/low CTL pulses that increment/decrement DAC code by 1 LSB, while noise immunity rejects transients <20µs and ignores the first power-up pulse.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 7-bit DAC (128 steps), enabling fine VCOM tuning resolution down to ~15.75mV in typical 5V→3V range |
| Sink Current Range | 10µA to 200µA (set by RSET), directly determining minimum VCOM level and adjustment span |
| VDD Supply Range | 2.6V to 3.6V - compatible with standard 3.3V logic rails and includes UVLO reset at 2.2V/2.1V thresholds |
| VAVDD Supply Range | 4.5V to 20V - supports wide-panel source-driver voltages without external regulation |
| EEPROM Programming Voltage | 15.5V ±0.25V (VPP) - requires precise ramp timing (7.5ms) and hold (1ms) to ensure reliable data retention |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade LCD panel manufacturing and field operation |
| Package | 8-pin TDFN (3mm × 3mm, 0.8mm max height) - surface-mount footprint optimized for compact display module PCBs |
Pinout & Package
MAX1512ETA+ is housed in an 8-pin 3mm × 3mm thin dual-flat no-lead (TDFN) package with exposed thermal pad. Pin 1 is marked by a "+" sign on lead-free variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Sink-current output | Connects to R1/R2 voltage divider; IOUT lowers VCOM by sinking adjustable current from divider node |
| AVDD (Pin 2) | Analog high-voltage supply | Powers internal current sink; sets DAC full-scale reference; must be ≥4.5V and ≤20V |
| N.C. (Pin 3) | No connect | Not internally bonded; must remain unconnected per datasheet |
| GND (Pin 4) | Ground reference | Common return for VDD, AVDD, SET, and OUT current path |
| VDD (Pin 5) | Digital logic supply | Powers control logic and EEPROM interface; 2.6V–3.6V range with UVLO protection |
| CTL (Pin 6) | Single-wire control | Carries both VCOM adjustment pulses and EEPROM programming voltage; requires precise timing and voltage ramping |
| CE (Pin 7) | Interface enable | Active-high signal enabling CTL functionality; pulling low reduces VDD current by ~60% |
| SET (Pin 8) | Full-scale current setting | Resistor-to-GND (RSET) defines maximum IOUT; determines VCOM adjustment range and resolution |
Key Features
| Feature | Design Value |
|---|---|
| 7-bit monotonic DAC | Guaranteed monotonic output across full temperature and supply range eliminates VCOM overshoot during calibration sweeps |
| Single-wire CTL interface | Combines programming power delivery and command signaling - eliminates need for dedicated programming pins or connectors on LCD panels |
| Internal EEPROM storage | Retains last-calibrated DAC code across power cycles; factory-set to mid-scale (64) for safe default startup |
| RSET-adjustable full-scale current | Enables design flexibility: larger RSET increases resolution but narrows VCOM adjustment range; validated 2.25kΩ–45kΩ range ensures accuracy |
| VDD UVLO with hysteresis | 2.1V/2.2V threshold with 100mV hysteresis prevents erratic behavior during brown-out conditions common in panel power sequencing |
Applications
| Notebook Computers | LCD Monitors |
|---|---|
Use Scenario: Automated VCOM calibration during final assembly line testing of 13–17-inch notebook displays. IC Role / Device Role / Timing Role: Solid-state replacement for manual potentiometer trimming; adjusts LCD backplane voltage to minimize flicker and improve grayscale uniformity. Use Value: Reduces calibration time from minutes to seconds per unit and eliminates mechanical wear, improving long-term display stability. | Use Scenario: Factory calibration of 24–32-inch desktop LCD monitors before packaging and shipment. IC Role / Device Role / Timing Role: Programmable VCOM calibrator interfacing with production-grade programming fixtures via single-wire CTL connection. Use Value: Enables repeatable, traceable calibration settings stored in EEPROM - critical for quality consistency across high-volume monitor SKUs. |
| LCD TVs | Industrial Display Panels |
Use Scenario: In-line VCOM tuning during mass production of 43–75-inch LCD TV modules. IC Role / Device Role / Timing Role: High-voltage-tolerant (up to 20V AVDD) calibrator integrated into TV main board or TCON board for panel-specific VCOM offset correction. Use Value: Supports wide AVDD range required by large-panel source drivers while maintaining monotonic DAC response across operating temperature. | Use Scenario: Calibration of sunlight-readable industrial HMI displays deployed in factory automation equipment. IC Role / Device Role / Timing Role: EEPROM-retained VCOM setting ensures consistent image quality after repeated power cycling in harsh environments. Use Value: Eliminates field recalibration needs - critical for sealed, maintenance-free industrial enclosures where physical access is restricted. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar VCOM calibration applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1513ETA+ | Same pinout and function but includes internal RSET (no external resistor required); slightly higher quiescent current | Better suited for designs prioritizing BOM simplification over RSET tuning flexibility | Select MAX1513ETA+ when eliminating external RSET saves layout area and cost outweighs minor current penalty |
| TPS65150RGER | Integrated VCOM generator with boost converter; no EEPROM; requires separate digital interface (I²C) | Targeted at systems needing full display power management (VGH/VGL/VCOM) in one IC | Choose TPS65150RGER only if consolidating multiple power rails justifies added complexity and loss of standalone VCOM calibration simplicity |
Compared with MAX1512ETA+, MAX1513ETA+ offers plug-in replacement with reduced external components but less tuning granularity, while TPS65150RGER provides broader power integration at the expense of dedicated EEPROM-based VCOM calibration robustness and single-wire simplicity.
Availability
MAX1512ETA+ is available at Aetrix Electronics and suitable for notebook computers, LCD monitors, and industrial display panels requiring stable component supply, long-term calibration repeatability, and lead-free compliance.
Supply support for MAX1512ETA+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, computing, and consumer applications.
The MAX1512 belongs to Maxim's display power and timing product line, engineered specifically to replace electromechanical VCOM trimmers in TFT LCD manufacturing with programmable, repeatable, and automated calibration solutions.
FAQ
What is the primary function of the MAX1512ETA+ in an LCD system?
The MAX1512ETA+ serves as an EEPROM-programmable VCOM calibrator that replaces mechanical potentiometers in TFT LCD panels. It sinks a precisely adjustable current from an external resistive divider to set the LCD backplane voltage (VCOM), ensuring optimal image contrast and minimizing flicker. Its internal 7-bit DAC and nonvolatile memory allow factory calibration and consistent power-on behavior - a core capability of the MAX1512ETA+.
How does the single-wire CTL interface of the MAX1512ETA+ simplify LCD panel design?
Unlike traditional multi-pin calibration interfaces, the MAX1512ETA+ uses its CTL pin to deliver both programming power and digital commands - eliminating the need for separate clock, data, and power lines between the programming fixture and LCD panel. This reduces connector pin count, simplifies cable harnesses, and avoids PCB layout changes when upgrading from potentiometer-based designs - a key advantage of the MAX1512ETA+ in high-volume manufacturing.
What is the role of the RSET resistor in the MAX1512ETA+ circuit?
The RSET resistor connected from the MAX1512ETA+ SET pin to GND defines the full-scale sink current (IOUT), which directly determines the VCOM adjustment range and resolution. With RSET values from 2.25kΩ to 45kΩ, designers can trade off between fine-grained tuning (larger RSET) and wider voltage swing (smaller RSET). This external scaling is a defining feature of the MAX1512ETA+ architecture.
Does the MAX1512ETA+ require special voltage conditions to program its EEPROM?
Yes - EEPROM programming of the MAX1512ETA+ requires applying a precise 15.5V ±0.25V voltage (VPP) to the CTL pin using a controlled 7.5ms ramp from VDD/2, followed by a 1ms hold and fast discharge. Deviating from these specifications risks data corruption or EEPROM damage. The MAX1512ETA+ datasheet specifies strict timing and voltage tolerances to ensure reliable write cycles.
Can the MAX1512ETA+ operate reliably across automotive temperature ranges?
No - the MAX1512ETA+ is rated for -40°C to +85°C, meeting industrial temperature requirements but not the extended -40°C to +125°C range required for under-hood automotive applications. While it functions in automotive infotainment displays mounted in climate-controlled cabins, it is not qualified for AEC-Q100 or automotive-grade reliability testing. For such use cases, alternative solutions must be evaluated beyond the MAX1512ETA+.
MAX1512ETA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- TFT VCOM Calibrator
- Applications:
- Consumer Video
- Standards:
- -
- Control Interface:
- -
- Voltage - Supply:
- 2.6V ~ 3.6V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-TDFN-EP (3x3)
MAX1512ETA+ FAQ
1.How can I place an order for MAX1512ETA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1512ETA+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX1512ETA+ reliable?
The price and inventory of MAX1512ETA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1512ETA+ is usually 5 days.
3.What payment methods are accepted for MAX1512ETA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1512ETA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1512ETA+?
MAX1512ETA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1512ETA+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX1512ETA+?
For technical support, including MAX1512ETA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1512ETA+ requirements.
6.How does Aetrix verify that MAX1512ETA+ is sourced from the original manufacturer or authorized distributors?
All MAX1512ETA+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX1512ETA+ meets industry standards.
7.What is the process for return or replacement of MAX1512ETA+?
All MAX1512ETA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX1512ETA+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX1512ETA+ part is unused and in its original packaging.
Return procedure for MAX1512ETA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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