The MAX9697 12-channel programmable gamma reference system provides 12 programmable reference voltages with 10-bit resolution. These voltages can be used for gamma correction in TFT-LCD displays, as a VCOM reference, or as sources for level shifter inputs. Each reference voltage features a 10-bit digital-to-analog converter (DAC) and buffer with high peak current to reduce the recovery time of the output voltages when critical levels and patterns are displayed.
An adjustable, low-dropout linear regulator (LDO) further improves the stability and accuracy of the DAC outputs by creating the DAC reference. The MAX9697's integrated gate-driver output controls an external p-channel FET to slowly turn on the linear regulator so that the reference voltages ramp up in a controlled manner.
The MAX9697 has a serial peripheral interface (SPI™) bus for programming the reference voltages. The device also has a current-sense comparator to detect an abnormally high supply current in other areas of the application circuit.
The MAX9697 is available in a 28-pin TQFN package and is specified for operation over the -40°C to +125°C temperature range.
* 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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MAX9697
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TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
MAX9697ATI+
Active
TQFN;28 pin;26 mm²
Outline Drawing: 21-0140 (PDF)
Land Pattern: 90-0026 (PDF)
Use pkgcode/variation: T2855+6*
MAX9591 14 Programmable Gamma Reference Buffers with Four Static References for TFT-LCD Displays MAX9590 14 Programmable Gamma Reference Buffers with 4 Static References for TFT-LCD Displays MAX5678 Digitally Programmable LCD Gamma Reference Generator with VCOM Calibrator MAX5679 Digitally Programmable LCD Gamma Reference Generator with Digital Voltage Reference MAX9694 14 Programmable Gamma Reference Buffers with Four Static References for TFT LCDs MAX9669 10-Bit Programmable Gamma Reference System with MTP for TFT LCDs
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