Analog Devices Inc./Maxim Integrated MAX9591ETU+

Overview

MAX9591ETU+ from Maxim Integrated is an evaluation kit (EV kit) designed to demonstrate the MAX9591 reference-voltage generator IC for gamma correction in TFT-LCD panels. It delivers 14 programmable 8-bit DAC outputs and four static buffered reference outputs, operates from a 9V–20V DC supply, and features USB-to-I2C interface with Windows-compatible GUI software for real-time voltage configuration.

For engineers reviewing the MAX9591ETU+ datasheet, MAX9591ETU+ pinout, MAX9591ETU+ application, or MAX9591ETU+ equivalent, this page provides verified hardware context, I2C address configuration options, output current ratings per channel group, reference input handling, and stand-alone operation guidance - all critical for LCD panel reference design validation and gamma curve tuning.

Technical Context

The MAX9591ETU+ EV kit implements the MAX9591 IC in a 38-pin TQFN-EP package and supports dual-bank register architecture (Bank A/B), enabling alternating or static reference selection for gamma correction. It uses on-board resistor-divider networks (R37–R41) to generate default REFU_H/REFU_L/REFL_H/REFL_L inputs, but allows external reference injection via dedicated PCB pads.

I2C communication is handled via U4 (UART-to-USB converter) and level-translated by U7/U8 (MAX3394E), supporting slave addresses 0xE8–0xEF selectable via jumper JU6. Power delivery includes independent analog (AVDD) and digital (DVDD) rails, with DVDD configurable via jumper JU5 for either on-board 3.3V or user-supplied 2.7V–5.5V operation.

Key Specifications

Availability

MAX9591ETU+ is available at Aetrix Electronics and suitable for TFT-LCD gamma calibration, industrial reference-voltage generation, and high-resolution display panel development requiring stable component supply and rapid prototyping support.

Supply support for MAX9591ETU+ 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 solutions for industrial, communications, and consumer applications.

The MAX9591ETU+ belongs to Maxim's display interface and reference voltage product line, engineered specifically for high-fidelity gamma correction in TFT-LCD panels used in TVs, monitors, and industrial HMI displays.

FAQ

What is the primary function of the MAX9591ETU+ evaluation kit?

The MAX9591ETU+ evaluation kit demonstrates the MAX9591 reference-voltage generator IC for gamma correction in TFT-LCD panels. It provides 14 programmable DAC outputs and four static buffered reference outputs, enabling precise voltage tuning across gamma curves. The kit includes USB-to-I2C interface, Windows GUI software, and configurable jumpers for address and power setup - all pre-assembled and tested for immediate use in display reference design validation.

Can the MAX9591ETU+ be used without a PC?

Yes, the MAX9591ETU+ supports stand-alone operation. By cutting specific traces (SDA, SCL, STD_REG, BANK_SEL), moving jumper JU5 to pins 2–3, and connecting a user-supplied 2.7V–5.5V DVDD source, the board interfaces directly with an external I2C system. Pull-up resistors R35/R36 can be installed for signal integrity, and control signals (GPO, BANK_SEL) are accessible via labeled PCB pads per Table 3 in the official documentation.

How are the I2C slave addresses configured on the MAX9591ETU+?

The MAX9591ETU+ uses jumper JU6 to set the MAX9591 IC's I2C slave address to one of four options: 0xE8/0xE9 (default, A0 = GND), 0xEA/0xEB (A0 = DVDD), 0xEC/0xED (A0 = SCL), or 0xEE/0xEF (A0 = SDA). The GUI software auto-detects the address or allows manual selection; if no acknowledge is received, it prompts verification of JU6 position - ensuring reliable communication during evaluation and integration.

What are the output current capabilities of the MAX9591ETU+ DAC channels?

The MAX9591ETU+ DAC outputs are segmented by current rating: OUT_REFU_H/L, OUT_REFL_H/L, OUT1, OUT7, OUT8, and OUT14 each support up to 400mA peak current; OUT2–OUT6 and OUT9–OUT13 support up to 200mA peak. These values reflect the MAX9591 IC's internal driver capability and must be observed to avoid exceeding thermal limits or degrading voltage accuracy during gamma curve generation.

Does the MAX9591ETU+ evaluate other devices besides the MAX9591?

Yes, the MAX9591ETU+ is explicitly validated to evaluate both the MAX9591ETU+ and the MAX9590ETU+. The board's schematic, firmware, and GUI are compatible with both ICs, sharing identical pinout, register map, and functional behavior for gamma reference generation - allowing engineers to assess performance differences or migration paths between these closely related reference-voltage generators.