Analog Devices Inc./Maxim Integrated MAX9667ETP+T

Overview

The MAX9667ETP+T from Maxim Integrated is a 10-channel, 10-bit nonvolatile programmable gamma and VCOM reference voltage generator for TFT LCD panels. It integrates ten gamma DAC buffers (six 10mA, four 5mA), one VCOM operational amplifier with 400mA peak sink/source capability, on-chip multiple-time programmable (MTP) memory (300 write cycles), I²C and single-wire interfaces, and supports AVDD up to 20V. It replaces discrete resistor strings, DVRs, and external VCOM amplifiers in high-resolution display timing systems.

For engineers reviewing the MAX9667ETP+T datasheet, MAX9667ETP+T pinout, MAX9667ETP+T application, or MAX9667ETP+T equivalent, key selection criteria include gamma channel count (10), VCOM transient current (±400mA), MTP endurance (300 writes), I²C timing compliance (400kHz), and thermal shutdown behavior (160°C).

Technical Context

The MAX9667ETP+T implements ten independent 10-bit DACs feeding gamma output buffers-six rated for 10mA DC/400mA transient, four for 5mA DC/200mA transient-and one dedicated VCOM op-amp with unity-gain stability into capacitive loads. All DACs share a common REF input (0–AVDD), enabling precise full-scale scaling per panel design.

It features dual digital control: an I²C interface (400kHz, standard-mode) for full register and MTP memory access, and a legacy-compatible single-wire CTL/CE interface for flicker-adjustment-only VCOM toggling. MTP memory auto-loads at power-up, and thermal protection disables non-central gamma outputs above 160°C while preserving VCOM functionality.

Key Specifications

Pinout & Package

MAX9667ETP+T uses a 20-pin TQFN-EP package (5mm × 5mm, exposed pad). The exposed pad must be connected to digital ground for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar gamma and VCOM reference applications.

Compared with MAX9666ETP+T and MAX9665ETP+T, the MAX9667ETP+T delivers two additional gamma channels (10 vs. 8 or 6) while retaining identical VCOM drive strength, MTP reliability, and thermal protection-making it the optimal choice for next-generation high-fidelity displays demanding full 10-point correction.

Availability

MAX9667ETP+T is available at Aetrix Electronics and suitable for high-resolution TFT-LCD panels, automotive instrument clusters, and medical imaging monitors requiring stable component supply, long-term calibration retention, and robust thermal management.

Supply support for MAX9667ETP+T 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) designs precision analog and mixed-signal ICs for power, sensing, interface, and timing applications in industrial, automotive, and consumer systems.

The MAX9667ETP+T belongs to Maxim's TFT-LCD gamma/VCOM reference family, engineered specifically to replace discrete resistor strings and external amplifiers with a single-chip, nonvolatile, high-current solution for display calibration and stability.

FAQ

What is the maximum number of gamma channels supported by the MAX9667ETP+T?

The MAX9667ETP+T supports exactly 10 gamma channels (OUT0 through OUT9), as confirmed in the Ordering Information table and Functional Diagram. This distinguishes it from the 6-channel MAX9665ETP+T and 8-channel MAX9666ETP+T variants within the same family. Each channel features a dedicated 10-bit DAC and buffer optimized for TFT-LCD gamma correction.

Does the MAX9667ETP+T include nonvolatile memory, and how many write cycles does it support?

Yes, the MAX9667ETP+T integrates on-chip multiple-time programmable (MTP) memory that retains gamma and VCOM DAC codes without power. Per the datasheet Absolute Maximum Ratings and Detailed Description sections, this MTP memory supports up to 300 write operations-sufficient for factory calibration and panel-specific tuning across production lifecycles.

What is the peak output current capability of the VCOM amplifier in the MAX9667ETP+T?

The VCOM amplifier in the MAX9667ETP+T delivers ±400mA peak transient current, as specified in the Electrical Characteristics table under "VCOM OUTPUT" and confirmed in the Detailed Description section. This enables robust driving of large-area TFT-LCD backplanes during polarity switching without output droop or recovery delay.

Can the MAX9667ETP+T be used with both I²C and single-wire interfaces simultaneously?

No-the MAX9667ETP+T enforces strict interface arbitration: operation through one interface is blocked while the other is active. As stated in the Interoperability section, if the I²C interface is executing a command, inputs on the single-wire interface (CTL/CE) are ignored, and vice versa. This prevents register corruption during concurrent access.

What package type and thermal characteristics apply to the MAX9667ETP+T?

The MAX9667ETP+T uses a 20-pin TQFN-EP package (5mm × 5mm) with an exposed pad that must be soldered to a digital ground plane. Its thermal characteristics include θJA = 39°C/W and θJC = 6°C/W (per JEDEC JESD51-7), and it activates thermal shutdown at 160°C junction temperature-disabling non-central gamma outputs while preserving VCOM and OUT4/OUT5 functionality.