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Analog Devices Inc./Maxim Integrated MAX9674ETI+T
- Part No.:
- MAX9674ETI+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Video Processing
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX9674ETI+T.pdf
- Description:
- IC VIDEO GAMMA REF SYST 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,273
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Product details
Overview
MAX9674ETI+T from Maxim Integrated is a 16-channel, 10-bit programmable gamma reference IC with integrated VCOM driver and on-chip MTP memory for TFT LCD panel calibration. It delivers 200mA peak current per gamma channel and 600mA peak current on the VCOM output, settling within 1µs, and operates from 9V–20V analog and 2.7V–3.6V digital supplies. It is used in high-resolution LCD display timing and voltage calibration subsystems.
For engineers reviewing the MAX9674ETI+T datasheet, MAX9674ETI+T pinout, MAX9674ETI+T application, or MAX9674ETI+T equivalent, this page provides verified functional specifications, I²C register mapping, gamma/VCOM output performance under load, thermal shutdown behavior, and real-world design implications for TFT LCD power and reference architecture.
Technical Context
The MAX9674ETI+T integrates sixteen 10-bit DACs with buffered gamma outputs and one dedicated 10-bit DAC driving a high-current operational amplifier for VCOM. Each gamma channel guarantees monotonicity, ±1 LSB INL/DNL, and 375µV RMS noise (10MHz BW), while the VCOM amplifier supports direct capacitive backplane drive with 60MHz bandwidth and 100V/µs slew rate.
It uses an I²C interface (up to 400kHz) with configurable slave address (A0 pin), supports up to 300 MTP write cycles, and features thermal shutdown at +165°C with 15°C hysteresis. Power sequencing is simplified via single-chip generation of all panel reference voltages - eliminating external resistor strings, discrete DVRs, and separate VCOM amplifiers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gamma Channels | 16 independent analog outputs, each with 10-bit DAC and buffer - enables full-panel gamma curve tuning across high-resolution TFT displays. |
| VCOM Output | Dedicated 10-bit DAC + integrated op-amp delivering 600mA peak sink/source - directly drives LCD backplane capacitance without external buffering in most designs. |
| Settling Time | ≤1µs for both gamma and VCOM outputs - ensures stable reference voltages during fast polarity switching and line-rate transitions. |
| Analog Supply Range | 9V to 20V (AVDD/AVDD_AMP) - compatible with standard LCD panel high-voltage rails and eliminates need for external LDOs. |
| Digital Supply Range | 2.7V to 3.6V (DVDD) - interoperable with 3.3V microcontrollers and baseband processors in display subsystems. |
| I²C Interface | Standard-mode (400kHz), SMBus-compatible, with A0-addressable slave addressing - supports multi-device configuration on shared display bus. |
| MTP Endurance | 300 write cycles - sufficient for factory calibration and final trim, but not intended for runtime reprogramming. |
Pinout & Package
MAX9674ETI+T is housed in a 28-pin Thin QFN (5mm × 5mm) with exposed pad (EP), RoHS-compliant and lead-free. The EP must be soldered to system ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GMA1–GMA16 | Gamma DAC analog outputs | 16 buffered voltage references for LCD gamma correction; each sources/sinks 10mA DC and 200mA transient current. |
| VCOM | VCOM amplifier output | High-current output for LCD common electrode; drives backplane capacitance directly with 600mA peak capability. |
| VCOM_FB | VCOM amplifier feedback | Connects to VCOM output for unity-gain configuration; enables precise closed-loop regulation of VCOM voltage. |
| REF | DAC reference input | Defines full-scale output range for all 16 gamma DACs and VCOM DAC via VOUT = (VREF × CODE)/1024. |
| SCL / SDA / A0 | I²C interface signals | Enable register programming and MTP configuration; A0 selects between two I²C addresses (E8h/EAh write, E9h/EBh read). |
| AVDD / AVDD_AMP / DVDD / GND / AGND_AMP | Power and ground terminals | Separate analog (gamma/VCOM) and digital supply domains minimize noise coupling; AGND_AMP isolates VCOM amplifier ground. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MTP memory | Stores gamma and VCOM calibration values on-die - removes external EEPROM, reduces BOM count, and secures panel-specific tuning data. |
| 16-channel gamma + 1-channel VCOM | Single-chip replacement for resistor string + discrete VCOM amp - simplifies layout, improves matching, and reduces board area by >40% vs. discrete solutions. |
| 600mA VCOM drive capability | Eliminates need for external VCOM power amplifier in mid-size panels (≤15.6") - lowers system cost and thermal load. |
| 1µs output settling | Enables stable grayscale rendering during rapid frame updates and polarity inversion - critical for flicker-free video playback. |
| Thermal shutdown with hysteresis | Disables gamma outputs at +165°C and re-enables at +150°C - protects device during overcurrent or poor heatsinking conditions without latch-up. |
Applications
| Automotive Instrument Clusters | Industrial HMI Displays |
|---|---|
|
Use Scenario: High-brightness, wide-temperature TFT LCDs in digital dashboards requiring consistent gamma across operating conditions. IC Role / Device Role / Timing Role: Generates 16 calibrated gamma reference voltages and dynamic VCOM bias synchronized to display controller timing. Use Value: Maintains color fidelity and contrast ratio over -40°C to +85°C using on-chip MTP-trimmed DACs - avoids recalibration in field. |
Use Scenario: Ruggedized touchscreens in factory HMIs where ESD immunity and long-term voltage stability are critical. IC Role / Device Role / Timing Role: Provides low-noise, high-PSRR gamma references and robust VCOM drive immune to industrial supply ripple. Use Value: 90dB PSRR (60kHz) and 375µV RMS noise ensure stable grayscale levels despite 24V rail noise and motor switching transients. |
| Medical Diagnostic Monitors | Consumer Tablet Panels |
|
Use Scenario: High-accuracy grayscale rendering in ultrasound and X-ray preview displays where luminance linearity is diagnostic-critical. IC Role / Device Role / Timing Role: Delivers monotonic 10-bit gamma outputs with ±1 LSB INL to meet DICOM GSDF compliance requirements. Use Value: Guaranteed monotonicity and <±40mV total output error enable pixel-level grayscale accuracy without post-fabrication trimming. |
Use Scenario: Cost-sensitive tablet displays requiring fast gamma tuning during mass production calibration. IC Role / Device Role / Timing Role: Enables panel-by-panel automatic gamma and flicker calibration via I²C during final test. Use Value: 300 MTP write cycles support full factory calibration sequence - reducing test time and yield loss vs. external EEPROM-based methods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar gamma reference and VCOM driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9673ETI+ | 14-channel gamma output (vs. 16), identical VCOM spec, same package and pinout - pins 26–28 are NC. | Suitable for lower-resolution panels (e.g., 10.1" or smaller) where fewer gamma points suffice; shares identical register map except GMA15/GMA16. | Select when panel gamma curve requires ≤14 reference points and BOM consolidation with MAX9674ETI+T is desired. |
| MAX9672ETI+ | 12-channel gamma output, no GMA13–GMA16 pins; otherwise identical architecture, MTP, and VCOM performance. | Targeted at entry-level displays (e.g., 7"–8") with simpler gamma profiles; lacks support for advanced multi-zone backlight compensation schemes. | Choose for cost-optimized designs where 12-point gamma suffices and PCB layout reuse across MAX9672/MAX9673/MAX9674 families is prioritized. |
Compared with MAX9673ETI+ and MAX9672ETI+, the MAX9674ETI+T provides maximum gamma channel count in the family - enabling finer grayscale control for high-PPI panels - while maintaining full register compatibility, thermal protection, and MTP endurance across all three variants.
Availability
MAX9674ETI+T is available at Aetrix Electronics and suitable for TFT LCD display modules, automotive instrument clusters, and industrial HMI systems requiring stable, programmable gamma and VCOM reference voltage generation with factory-calibrated nonvolatile storage.
Supply support for MAX9674ETI+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) is a semiconductor company specializing in precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and consumer applications.
The MAX9672/MAX9673/MAX9674 product line was designed specifically to replace discrete gamma resistor strings and VCOM amplifiers in TFT LCD timing controllers - integrating calibration memory, high-current drive, and noise-immune interfaces into a single compact package.
FAQ
What is the maximum gamma channel count supported by the MAX9674ETI+T?
The MAX9674ETI+T supports 16 gamma channels (GMA1–GMA16), the highest count in the MAX9672/MAX9673/MAX9674 family. This enables fine-grained grayscale control for high-resolution TFT LCD panels, including those used in medical imaging and premium consumer tablets. All 16 outputs are active and electrically validated in the MAX9674ETI+T.
Does the MAX9674ETI+T require external EEPROM for gamma calibration storage?
No. The MAX9674ETI+T includes integrated multiple-time programmable (MTP) memory that stores gamma and VCOM calibration values on-die. This eliminates the need for external EEPROM, reduces component count, improves reliability, and secures panel-specific tuning data against tampering or accidental overwrite during operation.
What is the VCOM output current capability of the MAX9674ETI+T?
The MAX9674ETI+T VCOM output delivers up to 600mA peak sink/source current with ≤1µs settling time. This allows direct drive of typical TFT LCD backplane capacitance without external amplification in panels up to 15.6". The integrated current limiting protects bond wires during overload or short-circuit events.
Can the MAX9674ETI+T operate from a 12V analog supply?
Yes. The MAX9674ETI+T supports analog supply voltages from 9V to 20V on both AVDD and AVDD_AMP rails. A 12V supply falls well within specification and is commonly used in automotive and industrial display systems. Performance parameters such as PSRR, load regulation, and output error remain fully guaranteed across this range.
How many I²C addresses does the MAX9674ETI+T support?
The MAX9674ETI+T supports two I²C slave addresses via the A0 pin: when A0 = GND, the write address is E8h (read E9h); when A0 = DVDD, the write address is EAh (read EBh). This allows up to two MAX9674ETI+T devices - or combinations with MAX9672/MAX9673 - to coexist on the same I²C bus without address conflict.
MAX9674ETI+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Gamma Reference
- Applications:
- Video Display
- Standards:
- -
- Control Interface:
- I2C, Serial
- Voltage - Supply:
- 2.7V ~ 3.6V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 28-TQFN (5x5)
MAX9674ETI+T FAQ
1.How can I place an order for MAX9674ETI+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9674ETI+T 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 MAX9674ETI+T reliable?
The price and inventory of MAX9674ETI+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9674ETI+T is usually 5 days.
3.What payment methods are accepted for MAX9674ETI+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9674ETI+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9674ETI+T?
MAX9674ETI+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9674ETI+T 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 MAX9674ETI+T?
For technical support, including MAX9674ETI+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9674ETI+T requirements.
6.How does Aetrix verify that MAX9674ETI+T is sourced from the original manufacturer or authorized distributors?
All MAX9674ETI+T 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 MAX9674ETI+T meets industry standards.
7.What is the process for return or replacement of MAX9674ETI+T?
All MAX9674ETI+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9674ETI+T, 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 MAX9674ETI+T part is unused and in its original packaging.
Return procedure for MAX9674ETI+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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