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Maxim Integrated - Nonvolatile Programmable Gamma and VCOM Reference Voltages

Numéro de référence MAX9665
Description Nonvolatile Programmable Gamma and VCOM Reference Voltages
Fabricant Maxim Integrated 
Logo Maxim Integrated 





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MAX9665 fiche technique
19-5000; Rev 4; 7/10
6/8/10-Channel, 10-Bit, Nonvolatile Programmable
Gamma and VCOM Reference Voltages
General Description
The MAX9665/MAX9666/MAX9667 provide multiple
programmable reference voltages for gamma correc-
tion in TFT LCDs and a programmable reference volt-
age for VCOM adjustment. All gamma and VCOM
reference voltages have a 10-bit digital-to-analog con-
verter (DAC) and buffer with high peak current. This
reduces the recovery time of the output voltage when
critical levels and patterns are displayed.
These devices include multiple-time programmable
(MTP) memory to store gamma and VCOM codes on
the chip, eliminating the need for external EEPROM.
The MTP memory supports up to 300 write operations.
The MAX9665/MAX9666/MAX9667 feature an I2C inter-
face to control the programmable reference voltages
and a single-wire interface to toggle the VCOM refer-
ence voltage up or down.
Applications
TFT LCDs
Ordering Information
PART
GAMMA
CHANNELS
TEMP RANGE
PIN-
PACKAGE
MAX9665ETP+ 6 -40°C to +85°C 20 TQFN-EP*
MAX9666ETP+ 8 -40°C to +85°C 20 TQFN-EP*
MAX9667ETP+ 10 -40°C to +85°C 20 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Pin Configurations
TOP VIEW
15 14 13 12 11
Features
o 6/8/10 Channels Gamma Correction, 10-Bit
Resolution
o VCOM Driver
o Integrated Multiple-Time Programmable Memory
o DAC Reference Input
o Single-Wire and I2C Programming of VCOM
Reference
o 950mA Peak Transient Current on VCOM Channel
Functional Diagrams
AVDD
REF
10
DAC
10
DAC
10
DAC
MTP
MEMORY
I2C
REGISTERS
10
DAC
10
DAC
10
DAC
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
REF 16
AVDD 17
FB 18
VCOM 19
CTL 20
+
MAX9665
EP*
1 2345
10 OUT3
9 N.C.
8 OUT4
7 N.C.
6 OUT5
THIN QFN
5mm x 5mm
*EP = EXPOSED PAD. CONNECT TO DIGITAL GROUND PLANE.
Pin Configurations continued at end of data sheet.
DVDD
SCL
SDA
CE
CTL
GND
10
DAC
I2C
SINGLE-WIRE
INTERFACE
MAX9665
VCOM
FB
Functional Diagrams continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

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