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Analog Devices Inc./Maxim Integrated MAX9672ETI+TG0E
- Part No.:
- MAX9672ETI+TG0E
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Video Processing
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MAX9672ETI+TG0E.pdf
- Description:
- PROGRAMMABLE GAMMA REFERENCE
- Quantity:
- Payment:
- Shipping:
Inventory:17,500
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Product details
Overview
The MAX9672ETI+TG0E from Maxim Integrated is a 12-channel, 10-bit programmable gamma reference IC with integrated VCOM driver and on-chip multiple-time programmable (MTP) memory for TFT LCD panel calibration. It delivers stable gamma voltages (±40mV total output error) and a high-current VCOM output (600mA peak), operating from 9V–20V analog supply and 2.7V–3.6V digital supply. It is used in high-resolution LCD display timing control circuits requiring panel-specific gamma/VCOM tuning during manufacturing.
For engineers reviewing the MAX9672ETI+TG0E datasheet, MAX9672ETI+TG0E pinout, MAX9672ETI+TG0E application, or MAX9672ETI+TG0E equivalent, this page provides verified technical context, I²C register mapping, gamma/VCOM settling time (≤1µs), MTP write endurance (300 cycles), and real-world TFT LCD panel integration constraints - all confirmed against Maxim's official 19-4718 Rev 4 datasheet.
Technical Context
The MAX9672ETI+TG0E implements twelve independent 10-bit DACs (GMA1–GMA12), each with dedicated buffer output and ±0.125 LSB INL/DNL, plus one 10-bit VCOM DAC with integrated rail-to-rail amplifier capable of ±600mA transient current. All DACs share a common REF input and are programmed via I²C interface (up to 400kHz) using 7-bit slave address configurable by A0 pin.
It integrates 300-cycle MTP nonvolatile memory storing gamma and VCOM values per panel, eliminating external EEPROM. Thermal shutdown activates at +165°C (15°C hysteresis), and power sequencing is simplified via single-chip generation of all panel reference voltages - including gamma, VCOM, and optional level-shifter references - under controlled AVDD/AVDD_AMP voltage tracking (±0.3V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gammas Channels | 12 independent analog outputs (GMA1–GMA12); MAX9672ETI+TG0E excludes GMA13–GMA16 per pinout and ordering table. |
| DAC Resolution | 10-bit (0–1023 code); full-scale output = (VREF × CODE)/1024; guarantees monotonicity and ≤1 LSB INL/DNL. |
| VCOM Output Current | ±600mA peak transient; enables direct drive of large-area TFT LCD backplanes without external buffering in most designs. |
| Settling Time | ≤1µs for both gamma and VCOM outputs; ensures stable voltage levels during fast polarity switching and line-rate transitions. |
| Analog Supply Range | 9V to 20V (VAVDD, VAVDD_AMP); supports wide-input industrial LCD power rails while maintaining <±40mV total output error. |
| I²C Interface | Standard-mode (0–400kHz); 7-bit address with A0 pin selection; supports volatile register writes and MTP programming with ACK handshake. |
| MTP Endurance | 300 write cycles; stores factory-calibrated or production-line-tuned gamma/VCOM values per panel, enabling auto-calibration workflows. |
Pinout & Package
MAX9672ETI+TG0E uses a 28-pin Thin QFN (5mm × 5mm) package with exposed thermal pad (EP), RoHS-compliant and lead-free. Pin 1 is GMA16 (N.C. for MAX9672), pins 1–12 and 22–25 provide gamma outputs GMA1–GMA12, pin 7 is VCOM, pin 8 is VCOM_FB, and pins 2–4 support I²C (SCL, SDA, A0).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 26–28 | No Connection | Not internally connected; must be left floating or tied to GND per layout guidelines - unused for MAX9672ETI+TG0E. |
| 2 (SCL) | I²C Clock Input | Master-generated clock up to 400kHz; requires ≥500Ω pull-up; synchronizes all register reads/writes and MTP programming. |
| 3 (SDA) | I²C Data I/O | Open-drain bidirectional bus; carries slave address, register pointers, and 16-bit data words; requires ≥500Ω pull-up. |
| 4 (A0) | I²C Address Bit | Sets LSB of 7-bit slave address (E8h/E9h when A0 = GND; EAh/EBh when A0 = DVDD); enables dual-device addressing on same bus. |
| 5 (DVDD) | Digital Supply | 2.7V–3.6V logic supply; bypass with 0.1µF capacitor to GND; powers I²C interface and register logic only. |
| 6 (AGND_AMP) | VCOM Amp Ground | Separate analog ground for VCOM amplifier section; minimizes coupling noise into high-current VCOM output path. |
| 7 (VCOM) | VCOM Output | Main common voltage output; drives TFT LCD backplane directly; supports ±600mA transient load with ≤1µs settling. |
| 8 (VCOM_FB) | VCOM Amplifier Feedback | Connects to VCOM output node externally; configures amplifier as unity-gain follower; critical for stability with capacitive loads. |
| 9 (AVDD_AMP) | VCOM Amp Supply | 9V–20V supply for VCOM amplifier only; must track AVDD within ±0.3V; bypass with 0.1µF to AGND_AMP. |
| 10, 21 (AVDD) | Analog Supply | Main 9V–20V supply for gamma DACs and buffers; bypass with 0.1µF capacitor to GND; shared with REF input path. |
| 11 (GND) | Analog Ground | Primary analog reference plane; connects internally to EP; must tie to system ground with low-inductance path. |
| 12–25 (GMA1–GMA12) | Gamma Outputs | Twelve buffered 10-bit DAC outputs; each sources/sinks ±200mA peak; settle ≤1µs; drive gamma resistor string nodes directly. |
| 20 (REF) | DAC Reference Input | Analog reference voltage (typically 10V–18V); sets full-scale range for all gamma and VCOM DACs per VOUT = (VREF × CODE)/1024. |
| EP | Exposed Pad | Internally connected to GND and AGND_AMP; must be soldered to solid ground plane for thermal dissipation and noise control. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MTP Memory | Stores gamma and VCOM calibration values on-chip (300 write cycles); eliminates external EEPROM and reduces BOM count and layout area. |
| 12-Channel Gamma DAC | Twelve 10-bit monotonic DACs with ±0.125 LSB DNL/INL; each drives 200mA peak to support high-resolution TFT gamma curves with minimal droop. |
| VCOM Amplifier | Integrated rail-to-rail op-amp delivering ±600mA transient current; settles in ≤1µs; includes thermal shutdown and current limiting for bond-wire protection. |
| Programmable VCOM Limits | VCOMMIN/VCOMMAX registers (0x18/0x19) constrain output range during I²C writes; prevent overvoltage stress on LCD panel during calibration or fault conditions. |
| High PSRR & Low Noise | ≥60dB PSRR (9–20V AVDD/AVDD_AMP), 375µV RMS noise (10MHz BW); maintains gamma/VCOM accuracy despite supply ripple from DC/DC converters. |
Applications
| Automotive Instrument Clusters | Industrial HMI Displays |
|---|---|
|
Use Scenario: High-brightness, wide-temperature TFT LCDs in dashboards require precise gamma correction across varying ambient light and panel aging. IC Role / Device Role / Timing Role: MAX9672ETI+TG0E generates 12 calibrated gamma reference voltages and dynamic VCOM to maintain consistent grayscale and contrast. Use Value: On-chip MTP allows per-panel factory calibration; 1µs settling prevents flicker during rapid gauge animation or warning icon transitions. |
Use Scenario: Ruggedized touchscreens in factory HMIs operate under wide temperature swings (-40°C to +85°C) and require stable VCOM to suppress image retention. IC Role / Device Role / Timing Role: MAX9672ETI+TG0E serves as central reference generator - providing gamma string bias and VCOM backplane voltage synchronized to display controller timing. Use Value: 600mA VCOM drive capability eliminates need for external op-amp; integrated thermal shutdown protects against overheating in sealed enclosures. |
| Medical Diagnostic Monitors | Avionics Display Systems |
|
Use Scenario: High-fidelity grayscale rendering in ultrasound/X-ray monitors demands sub-1% gamma error and zero VCOM drift over time. IC Role / Device Role / Timing Role: MAX9672ETI+TG0E acts as precision analog reference subsystem - converting digital gamma tables into stable analog voltages with <±40mV total error. Use Value: 10-bit resolution and ±0.125 LSB INL ensure diagnostic image fidelity; MTP storage preserves calibration across device lifecycle and firmware updates. |
Use Scenario: Cockpit displays must meet DO-254 safety requirements and sustain operation during EMI events and power transients. IC Role / Device Role / Timing Role: MAX9672ETI+TG0E functions as certified analog reference source - generating gamma and VCOM under strict I²C command validation and thermal monitoring. Use Value: Dual ground planes (GND + AGND_AMP), 80dB channel isolation, and 50dB horizontal-noise suppression reduce susceptibility to flight-critical EMI. |
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 (GMA1–GMA14); identical VCOM, MTP, and I²C architecture; shares same 28-TQFN package and pinout except GMA13/GMA14 active. | Required where extended gamma curve resolution (e.g., >12-step grayscale) is needed for ultra-high-definition panels. | Select MAX9673ETI+ only if 14 gamma channels are required; MAX9672ETI+TG0E remains optimal for cost-sensitive 12-channel designs with identical performance per channel. |
| MAX9674ETI+ | 16-channel gamma output (GMA1–GMA16); same VCOM specs, MTP, and I²C interface; pin-compatible but GMA15/GMA16 pins enabled versus N.C. on MAX9672ETI+TG0E. | Used in premium LCD panels requiring full 16-step gamma compensation for HDR or wide-color-gamut displays. | MAX9674ETI+ offers maximum channel count but higher cost; MAX9672ETI+TG0E provides best value for standard 12-channel TFT timing control without overdesign. |
Compared with MAX9673ETI+ and MAX9674ETI+, the MAX9672ETI+TG0E delivers identical per-channel DAC accuracy, VCOM drive strength, and MTP reliability - but targets cost-optimized 12-channel LCD panels where fewer gamma steps suffice, reducing PCB routing complexity and BOM overhead.
Availability
MAX9672ETI+TG0E is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial HMI displays, and medical diagnostic monitors requiring stable component supply, long-term calibration retention, and high-current VCOM drive capability.
Supply support for MAX9672ETI+TG0E 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 medical applications.
The MAX9672/MAX9673/MAX9674 product line was designed specifically for TFT LCD panel reference generation - integrating gamma DACs, VCOM amplifiers, and MTP memory into a single chip to replace discrete resistor strings, op-amps, and EEPROMs.
FAQ
What is the maximum number of gamma channels supported by the MAX9672ETI+TG0E?
The MAX9672ETI+TG0E supports exactly 12 gamma output channels (GMA1 through GMA12), as confirmed by the Ordering Information table, Pin Configuration diagram, and functional description in Maxim's 19-4718 Rev 4 datasheet. Pins GMA13–GMA16 are marked "N.C." for MAX9672ETI+TG0E and are not internally connected.
Does the MAX9672ETI+TG0E include nonvolatile memory, and how many write cycles does it support?
Yes, the MAX9672ETI+TG0E includes integrated multiple-time programmable (MTP) nonvolatile memory that stores gamma and VCOM calibration values on-chip. It supports up to 300 write operations, as specified in the General Description and Electrical Characteristics sections of the official datasheet - eliminating the need for external EEPROM.
What are the absolute maximum ratings for analog and digital supplies on the MAX9672ETI+TG0E?
The MAX9672ETI+TG0E has an absolute maximum analog supply rating of –0.3V to +22V for AVDD and AVDD_AMP, and –0.3V to +4V for DVDD. These limits are defined in the Absolute Maximum Ratings table; exceeding them risks permanent damage. Recommended operating ranges are 9V–20V (analog) and 2.7V–3.6V (digital).
How does the VCOM amplifier in the MAX9672ETI+TG0E handle capacitive loads typical of TFT LCD backplanes?
The VCOM amplifier in the MAX9672ETI+TG0E is designed to directly drive typical TFT LCD backplane capacitance without external series resistance. Its 600mA peak current capability, 100V/µs slew rate, and internal current limiting protect bond wires while maintaining ≤1µs settling - validated in the Typical Operating Characteristics (toc16) and Detailed Description sections.
Can the MAX9672ETI+TG0E be used with a 10V reference voltage, and what is the resulting full-scale output range?
Yes, the MAX9672ETI+TG0E supports VREF from 9V to 20V, including 10V. With VREF = 10V and 10-bit resolution, the full-scale output is (10V × 1023)/1024 = 9.990V. This is confirmed by the DAC equation in the Detailed Description and the VREF = 10V plots in the Typical Operating Characteristics (toc06, toc07).
MAX9672ETI+TG0E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Gamma Reference
- Applications:
- Video Display
- Standards:
- -
- Control Interface:
- I2C
- Voltage - Supply:
- 2.7V ~ 3.6V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 28-TQFN (5x5)
MAX9672ETI+TG0E FAQ
1.How can I place an order for MAX9672ETI+TG0E through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9672ETI+TG0E 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 MAX9672ETI+TG0E reliable?
The price and inventory of MAX9672ETI+TG0E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9672ETI+TG0E is usually 5 days.
3.What payment methods are accepted for MAX9672ETI+TG0E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9672ETI+TG0E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9672ETI+TG0E?
MAX9672ETI+TG0E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9672ETI+TG0E 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 MAX9672ETI+TG0E?
For technical support, including MAX9672ETI+TG0E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9672ETI+TG0E requirements.
6.How does Aetrix verify that MAX9672ETI+TG0E is sourced from the original manufacturer or authorized distributors?
All MAX9672ETI+TG0E 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 MAX9672ETI+TG0E meets industry standards.
7.What is the process for return or replacement of MAX9672ETI+TG0E?
All MAX9672ETI+TG0E units undergo pre-shipment inspection (PSI). If there is an issue with MAX9672ETI+TG0E, 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 MAX9672ETI+TG0E part is unused and in its original packaging.
Return procedure for MAX9672ETI+TG0E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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