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Analog Devices Inc./Maxim Integrated MAX9665ETP+
- Part No.:
- MAX9665ETP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Video Processing
- Package:
- 20-WQFN Exposed Pad
- Datasheet:
-
MAX9665ETP+.pdf
- Description:
- IC VIDEO GAMMA REF SYST 20TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,624
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Product details
Overview
The MAX9665ETP+ from Maxim Integrated is a 6-channel, 10-bit nonvolatile programmable gamma reference voltage generator with integrated VCOM driver for TFT LCD panels. It delivers precision gamma correction (OUT0–OUT5), a high-current VCOM output (950mA peak transient), and on-chip multiple-time programmable (MTP) memory storing up to 300 write cycles. It operates from 9V–20V AVDD and 2.7V–3.6V DVDD, supporting I²C and single-wire programming in industrial-grade -40°C to +85°C environments.
For engineers reviewing the MAX9665ETP+ datasheet, MAX9665ETP+ pinout, MAX9665ETP+ application, or MAX9665ETP+ equivalent, key selection criteria include gamma channel count (6), VCOM peak current capability (950mA), MTP endurance (300 writes), 10-bit DAC linearity (±1 LSB INL/DNL), and TQFN-EP package thermal performance (θJA = 39°C/W).
Technical Context
The MAX9665ETP+ integrates six independent 10-bit DACs feeding buffered gamma outputs (OUT0–OUT5), plus one dedicated 10-bit DAC driving a rail-to-rail VCOM operational amplifier. Its dual digital interface-full-function I²C (400kHz) and legacy-compatible single-wire (CTL/CE)-enables both factory calibration and in-system flicker adjustment without external EEPROM.
All gamma and VCOM DACs share a common REF input (0–AVDD), enabling scalable full-scale output via VREF scaling. The VCOM amplifier features internal current limiting, unity-gain stability into capacitive loads, and ±400mA continuous output, while gamma buffers deliver 5mA/10mA DC drive with 200mA/400mA peak transient recovery for fast pixel transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gamma Channels | 6 independent outputs (OUT0–OUT5) for TFT source driver biasing |
| DAC Resolution | 10-bit (0–1023 code range); enables 1024-step gamma curve granularity |
| VCOM Peak Current | 950mA transient (per datasheet Figure toc21); sustains rapid backplane charge/discharge |
| MTP Endurance | 300 write cycles; stores power-on default gamma/VCOM codes without external EEPROM |
| Analog Supply Range | 9V–20V AVDD; supports high-voltage LCD bias rails without external regulators |
| Digital Supply Range | 2.7V–3.6V DVDD; compatible with 3.3V logic systems and I²C buses |
| Output Linearity | ±1 LSB INL/DNL (at TA = +25°C, code 16–1008); ensures monotonic gamma voltage steps |
| Thermal Shutdown | 160°C junction activation with 15°C hysteresis; disables non-critical gamma buffers only |
Pinout & Package
The MAX9665ETP+ uses a 20-pin TQFN-EP package (5mm × 5mm, exposed pad). The exposed pad must be soldered to a digital ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CE | Single-wire interface enable | High = enables CTL control; low = disables CTL and reduces quiescent current |
| 2 DVDD | Digital supply input | 3.3V logic domain; requires 0.1µF local bypass to GND |
| 3 SCL | I²C clock input | Open-drain, 400kHz max; VIH ≥ 0.7×DVDD, VIL ≤ 0.3×DVDD |
| 4 SDA | I²C data I/O | Open-drain bidirectional; supports standard/fast-mode I²C protocol |
| 5 GND | Ground reference | Common analog/digital return; connects to exposed pad |
| 10 OUT5 | Gamma reference output | 10-bit DAC-buffered; 5mA/10mA DC drive, 200mA/400mA peak |
| 11 OUT4 | Gamma reference output | Same as OUT5; assigned to middle tap of gamma resistor ladder |
| 12 OUT3 | Gamma reference output | Same as OUT5; supports precise grayscale voltage division |
| 13 OUT2 | Gamma reference output | Same as OUT5; thermally protected during shutdown (Table 1) |
| 14 OUT1 | Gamma reference output | Same as OUT5; disabled during thermal shutdown |
| 15 OUT0 | Gamma reference output | Same as OUT5; top-end gamma ladder driver |
| 16 REF | DAC reference input | DC voltage (0–AVDD) sets full-scale DAC output; 384kΩ input impedance |
| 17 AVDD | Analog supply input | 9–20V high-voltage rail; requires ≥0.1µF local bypass to GND |
| 18 FB | VCOM amplifier inverting input | Connected directly to VCOM for unity-gain configuration |
| 19 VCOM | VCOM amplifier output | 950mA peak transient; drives TFT-LCD backplane capacitance directly |
| 20 CTL | VCOM/MTP control input | Pulse-driven for flicker adjustment; voltage-ramped for MTP programming |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MTP memory | Stores gamma/VCOM DAC codes across 300 write cycles; eliminates external EEPROM and manual trimming |
| Dual digital interface | I²C (full register access) + single-wire (legacy flicker tuning); prevents bus collision via idle-state arbitration |
| VCOM operational amplifier | Unity-gain stable into panel capacitance; ±400mA continuous, 950mA peak; no series resistor required in most designs |
| Gamma buffer architecture | Mixed 5mA/10mA DC drive with 200mA/400mA peak recovery; matches resistor ladder current demands |
| Power supply noise rejection | 90dB PSRR at 60kHz (AVDD), 80dB PSRR at 5MHz (channel-to-channel); suppresses horizontal line noise |
| Thermal protection | 160°C shutdown with 15°C hysteresis; selectively disables non-critical gamma buffers to maintain partial operation |
Applications
| Automotive Instrument Clusters | Industrial HMI Displays |
|---|---|
Use Scenario: High-brightness TFT LCDs in vehicle dashboards requiring flicker-free operation under wide temperature swings (-40°C to +85°C). IC Role / Device Role / Timing Role: Generates 6 gamma reference voltages and dynamic VCOM bias to calibrate grayscale and minimize AC coupling artifacts. Use Value: Eliminates discrete resistor strings and external VCOM amplifiers; reduces BOM count by 4+ components per panel. | Use Scenario: Ruggedized touchscreens in factory automation panels exposed to EMI and thermal cycling. IC Role / Device Role / Timing Role: Provides stable, programmable gamma references and high-current VCOM drive immune to supply ripple. Use Value: 90dB PSRR and 80dB channel isolation prevent noise coupling between gamma channels and VCOM path. |
| Medical Diagnostic Monitors | Avionics Display Systems |
Use Scenario: High-resolution diagnostic imaging displays demanding precise grayscale linearity and zero image retention. IC Role / Device Role / Timing Role: Delivers 10-bit gamma accuracy (±1 LSB INL/DNL) and fast VCOM settling (<2µs for ±500mA transients) for critical image fidelity. Use Value: On-chip MTP memory enables panel-specific calibration storage, eliminating post-assembly firmware updates. | Use Scenario: MIL-STD-810-certified cockpit displays requiring radiation-tolerant, long-lifecycle component sourcing. IC Role / Device Role / Timing Role: Supplies all gamma and VCOM references from a single IC with guaranteed -40°C to +85°C operation and 300-cycle field reprogrammability. Use Value: TQFN-EP package with θJA = 39°C/W enables conduction-cooled mounting in sealed avionics enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar gamma/VCOM reference generation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9666ETP+ | 8-channel gamma output (vs. 6); identical VCOM, MTP, and interface architecture | Requires higher-resolution gamma curves (e.g., 8-bit source drivers); same PCB footprint but different pin mapping for OUT6/OUT7 | Select when panel design mandates >6 gamma taps; verify layout compatibility with OUT6/OUT7 placement |
| MAX9667ETP+ | 10-channel gamma output (vs. 6); identical VCOM, MTP, and interface architecture | Targets ultra-high-fidelity panels (e.g., medical imaging); adds OUT8/OUT9 requiring additional routing and decoupling | Choose for future-proofing or multi-panel reuse; confirm AVDD current budget supports 10-channel load |
Compared with MAX9666ETP+ and MAX9667ETP+, the MAX9665ETP+ offers optimal cost and layout efficiency for 6-channel TFT panels, reducing gamma DAC count and associated passive filtering while retaining full VCOM functionality, MTP programmability, and thermal robustness.
Availability
The MAX9665ETP+ is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial HMI displays, medical diagnostic monitors, and avionics display systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX9665ETP+ 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 high-reliability industrial, automotive, and medical applications.
The MAX9665ETP+ belongs to Maxim's TFT LCD gamma/VCOM reference family, engineered to replace discrete resistor strings, external VCOM amplifiers, and EEPROM-based calibration in high-voltage display biasing systems.
FAQ
What is the maximum gamma channel count supported by the MAX9665ETP+?
The MAX9665ETP+ supports exactly 6 gamma reference outputs (OUT0–OUT5), as confirmed in the Ordering Information table and Pin Configurations diagram. This distinguishes it from the 8-channel MAX9666ETP+ and 10-channel MAX9667ETP+ in the same family. All three share identical VCOM, MTP, and interface specifications, but channel count is fixed per part number and cannot be configured via software or pins.
Does the MAX9665ETP+ require an external EEPROM for gamma calibration storage?
No, the MAX9665ETP+ does not require an external EEPROM. It integrates on-chip multiple-time programmable (MTP) memory capable of storing gamma and VCOM DAC codes across up to 300 write cycles. Upon power-up, the MTP contents automatically load into volatile I²C registers, enabling true "power-on default" behavior without external nonvolatile storage or boot-time firmware intervention.
What is the peak transient current capability of the VCOM output on the MAX9665ETP+?
The VCOM output of the MAX9665ETP+ delivers 950mA peak transient current, as specified in the Features section and verified in Typical Operating Characteristic Figure toc21 (VCOM LOAD TRANSIENT). This exceeds the ±400mA continuous rating and enables rapid charging/discharging of large TFT-LCD backplane capacitances during polarity switching, minimizing image flicker and ghosting artifacts.
Can the MAX9665ETP+ be programmed using only the single-wire interface?
The single-wire interface (CTL/CE pins) on the MAX9665ETP+ supports only VCOM level adjustment - it cannot program gamma registers or MTP memory. Full functionality (gamma code writes, MTP programming, readback) requires the I²C interface. The single-wire interface is provided for backward compatibility with legacy flicker-adjustment equipment like the MAX1512, but all gamma-related configuration must use I²C.
What package type and thermal characteristics does the MAX9665ETP+ use?
The MAX9665ETP+ 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 (JEDEC JESD51-7, four-layer board), enabling reliable operation at full load in industrial ambient temperatures up to +70°C with standard PCB copper area.
MAX9665ETP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-WQFN Exposed Pad
- Packaging:
- Bulk
- 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:
- 20-TQFN-EP (5x5)
MAX9665ETP+ FAQ
1.How can I place an order for MAX9665ETP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9665ETP+ 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 MAX9665ETP+ reliable?
The price and inventory of MAX9665ETP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9665ETP+ is usually 5 days.
3.What payment methods are accepted for MAX9665ETP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9665ETP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9665ETP+?
MAX9665ETP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9665ETP+ 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 MAX9665ETP+?
For technical support, including MAX9665ETP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9665ETP+ requirements.
6.How does Aetrix verify that MAX9665ETP+ is sourced from the original manufacturer or authorized distributors?
All MAX9665ETP+ 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 MAX9665ETP+ meets industry standards.
7.What is the process for return or replacement of MAX9665ETP+?
All MAX9665ETP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX9665ETP+, 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 MAX9665ETP+ part is unused and in its original packaging.
Return procedure for MAX9665ETP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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