MAX8738 is an I2C programmable VCOM calibrator for TFT LCD. It replaces the bulky mechanical potentiometer and simplifies the tedious VCOM adjustment process, greatly reducing labor costs and improving reliability and automation.
The MAX8738 is a low‑power, I²C‑compatible voltage‑adjustable sink‑current regulator. It integrates a high‑voltage programming supply for EEPROM, a 2‑wire I²C interface, and a selectable full‑scale sink‑current set by an external resistor. The document details absolute maximum ratings, electrical characteristics, pin assignments, and timing diagrams for proper integration.
Key sections include Absolute Maximum Ratings, Electrical Characteristics (supply ranges, temperature limits, I/O voltage levels), Pin Name Function table, Equivalent Circuit diagrams, and timing diagrams for I²C start/stop conditions and DAC programming. Package dimensions and mechanical drawings are also provided for PCB layout. This manual is written in Japanese.
| AVDD Supply Range | 4.5 V – 20 V |
|---|---|
| Operating Temperature Range | -40 °C – +85 °C |
| I²C Logic‑Low Voltage (VIL) | 0.8 V |
| I²C Logic‑High Voltage (VIH) | 2.1 V |
| SET Current (ISET) | 120 µA |
The device operates from –40 °C up to +85 °C.
AVDD may be supplied between 4.5 V and 20 V.
Logic‑low is 0.8 V and logic‑high is 2.1 V.
Connect a resistor (RSET) from the SET pin to ground; the full‑scale sink current equals the current through RSET.