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MAX5679
Digitally Programmable LCD Gamma Reference Generator with Digital Voltage Reference
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Status
Active: In Production.
Description
The MAX5679 digitally programmable LCD gamma reference generator provides 18 buffered channels for biasing LCD column drivers. The device provides 14 outputs of 8-bit programmable gamma reference voltage derived from four externally applied reference voltages, and four buffered outputs of the same externally applied reference voltages. An I²C serial interface programs the 14 upper and lower range gamma buffer outputs independently.
The MAX5679 features a digitally programmable voltage reference (DVR) with 7-bit adjustable current sink to set the LCD common backplane (VCOM) voltage. The MAX5679 includes a power-on reset (POR) function that configures all 14 programmable gamma outputs to predetermined levels upon initial power-up.
The MAX5679 is available in a 5mm x 5mm, 32-pin TQFN package and is specified over the -40°C to +85°C extended temperature range.
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Data Sheet
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Key Features
- 7-Bit Adjustable VCOM Calibrator (DVR)
- 14 Programmable Gamma Outputs for LCD
- Column Driver ICs
- 8-Bit DAC Resolution for Upper and Lower Range Outputs
- Maximum Output Swing of (AVDD - 0.2V) (OUT1–OUT7)
- Minimum Output Swing of (GND + 0.2V) (OUT8–OUT14)
- Four Independent Reference Inputs
- Four Independent Buffered Reference Outputs
- 9V to 20V Analog Supply
- 2V to 5.5V Digital Supply
- 400kHz I²C-Compatible Serial Interface
- Pin-Selectable I²C Address Bit Allows Two Slave IDs
- Backward Compatible with the MAX5678
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Applications/Uses
- TFT-LCD Panels for Desktop Monitors
- TFT-LCD Panels for Flat Screen TVs
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Key Specifications:
| Programmable Gamma Buffers |
| Part Number |
Total Channels |
Programmable Channels |
Resolution
(bits) |
Integrated Nonvolatile Memory |
Memory Banks |
VCOM Calibrator |
VCOM Buffer |
Interface |
VSUPPLY
(V) |
IQ
(mA) |
Oper. Temp.
(°C) |
Package/Pins |
| MAX5679 |
18 |
14 |
8 |
No |
1 |
Yes |
No |
I2C |
9 to 16.5 |
12.5 |
-40 to +85 |
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See All Programmable Gamma Buffers (21)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Product Guides
Reliability Reports
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Software/Models
Ordering Information
This product cannot be purchased through our web site. Contact factory for availability.
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Information Index
Document Ref.: 19-4058
Rev 1;
2009-09-17
This page last modified: 2009-09-17
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