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PDF MAX9666 Data sheet ( Hoja de datos )
| Número de pieza | MAX9666 | |
| Descripción | Nonvolatile Programmable Gamma and VCOM Reference Voltages | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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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.
1 page  
6/8/10-Channel, 10-Bit, Nonvolatile Programmable
Gamma and VCOM Reference Voltages
ELECTRICAL CHARACTERISTICS (continued)
(VAVDD = VREF = 15.7V, VDVDD = 3.3V, VGND = 0V, VCOM connected to FB, CTL = DVDD/2, no load, TA = -40°C to +85°C, unless
otherwise noted. Typical values are at TA = +25°C.) (Note 2)
PARAMETER
SYMBOL
I2C TIMING CHARACTERISTICS (Figure 4)
Serial-Clock Frequency
fSCL
Bus Free Time Between STOP
and START Conditions
tBUF
CONDITIONS
MIN TYP MAX UNITS
0 400 kHz
1.3 µs
Hold Time (Repeated) START
Condition
tHD,STA
0.6 µs
SCL Pulse-Width Low
SCL Pulse-Width High
Setup Time for a Repeated
START Condition
tLOW
tHIGH
tSU,STA
1.3 µs
0.6 µs
0.6 µs
Data Hold Time
Data Setup Time
SDA and SCL Receiving Rise
Time
tHD,DAT
tSU,DAT
tR
(Note 8)
0
100
20 +
0.1CB
900 ns
ns
300 ns
SDA and SCL Receiving Fall
Time
tF (Note 8)
20 +
0.1CB
300 ns
SDA Transmitting Fall Time
Setup Time for STOP Condition
Bus Capacitance
Pulse Width of Suppressed Spike
tF,TX
tSU,STO
CB
tSP
(Note 8)
20 +
0.1CB
0.6
0
250 ns
µs
400 pF
50 ns
Note 2: All devices are 100% production tested at TA = +25°C. Specifications over temperature limits are guaranteed by design.
Note 3: For AVDD below 15.6V, internal LDO must be externally adjusted to meet LDO dropout specification.
Note 4: This section applies to OUT0, OUT2, OUT3, and OUT5 of the MAX9665; OUT0, OUT3, OUT4, and OUT7 of the MAX9666;
OUT0, OUT4, OUT5, and OUT9 of the MAX9667.
Note 5: This section applies to OUT1 and OUT4 of the MAX9665; OUT1, OUT2, OUT5, and OUT6 of the MAX9666; OUT1, OUT2,
OUT3, OUT6, OUT7, and OUT8 of the MAX9667.
Note 6: Measured with the VCOM amplifier configured as an inverting unity-gain amplifier. RF = RIN = 10kΩ.
Note 7: Guaranteed by design. Not production tested.
Note 8: CB is in pF.
_______________________________________________________________________________________ 5
5 Page 
6/8/10-Channel, 10-Bit, Nonvolatile Programmable
Gamma and VCOM Reference Voltages
AVDD
REF
DVDD
SCL
SDA
CE
CTL
GND
AVDD
MTP
MEMORY
10
10
10
10
10
I2C
REGISTERS
10
10
10
10
10
10
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
DAC
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
OUT9
+ VCOM
-
FB
I2C
SINGLE-WIRE
INTERFACE
MAX9667
SOURCE
DRIVER
LCD PANEL
LEVEL
SHIFTER
Figure 1. Pullup and Pulldown Resistors Attached to Source Driver
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MAX9666.PDF ] | |
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