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 I
2
C inter-
face to control the programmable reference voltages
and a single-wire interface to toggle the VCOM refer-
ence voltage up or down.
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 I
2
C Programming of VCOM
Reference
o
950mA Peak Transient Current on VCOM Channel
MAX9665/MAX9666/MAX9667
Functional Diagrams
AVDD
REF
Applications
TFT LCDs
10
Ordering Information
PART
MAX9665ETP+
MAX9666ETP+
MAX9667ETP+
GAMMA
PIN-
TEMP RANGE
CHANNELS
PACKAGE
6
8
10
-40°C to +85°C 20 TQFN-EP*
-40°C to +85°C 20 TQFN-EP*
-40°C to +85°C 20 TQFN-EP*
MTP
MEMORY
I
2
C
REGISTERS
10
10
10
DAC
OUT0
DAC
OUT1
OUT2
DAC
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
OUT3
DAC
Pin Configurations
OUT0
OUT1
N.C.
N.C.
10
DAC
OUT4
TOP VIEW
OUT2
15
14
13
12
11
10
DAC
OUT5
REF 16
AVDD 17
FB 18
VCOM 19
CTL 20
10
9
OUT3
10
DAC
VCOM
N.C.
OUT4
N.C.
OUT5
DVDD
SCL
I
2
C
SDA
CE
FB
MAX9665
8
7
MAX9665
SINGLE-WIRE
INTERFACE
+
1
CE
2
DVDD
3
SCL
4
SDA
EP*
6
CTL
GND
5
GND
Functional Diagrams continued at end of data sheet.
THIN QFN
5mm x 5mm
*EP = EXPOSED PAD. CONNECT TO DIGITAL GROUND PLANE.
Pin Configurations 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.
6/8/10-Channel, 10-Bit, Nonvolatile Programmable
Gamma and VCOM Reference Voltages
MAX9665/MAX9666/MAX9667
ABSOLUTE MAXIMUM RATINGS
Supply Voltages
Continuous Power Dissipation (T
A
= +70°C)
AVDD to GND.....................................................-0.3V to +22V
20-Pin TQFN (derate 25.6mW/°C above +70°C) ....2051.3mW
DVDD to GND.......................................................-0.3V to +4V
Junction-to-Case Thermal Resistance (
θ
JC
) (Note 1)
20-Pin TQFN...................................................................6°C/W
Outputs
Junction-to-Ambient Thermal Resistance (
θ
JA
) (Note 1)
OUT0–OUT9, VCOM to GND .............-0.3V to (V
AVDD
+ 0.3V)
Inputs
20-Pin TQFN.................................................................39°C/W
SDA, SCL, CE to GND..........................................-0.3V to +4V
Operating Temperature Range ...........................-40°C to +85°C
CTL, REF to GND ...............................................-0.3V to +22V
Junction Temperature ......................................................+150°C
FB to GND ..........................................-0.3V to (V
AVDD
+ 0.3V)
Storage Temperature Range .............................-65°C to +150°C
Continuous Current
Lead Temperature (soldering, 10s) .................................+300°C
OUT0–OUT9, VCOM...................................................±400mA
Soldering Temperature (reflow) .......................................+260°C
All Other Pins ................................................................±50mA
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to
www.maxim-ic.com/thermal-tutorial.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
AVDD
= V
REF
= 15.7V, V
DVDD
= 3.3V, V
GND
= 0V, VCOM connected to FB, CTL = DVDD/2, no load, T
A
= -40°C to +85°C, unless
otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
SUPPLIES
Analog-Supply Voltage Range
V
AVDD
Guaranteed by power-supply rejection
ratio specification (Note 3)
9
20
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Analog-Supply Voltage Range for
Programming MTP
Digital-Supply Voltage Range
Analog Quiescent Current
Digital Quiescent Current
DVDD Undervoltage Lockout
DAC
Resolution
Integral Nonlinearity Error
Differential Nonlinearity Error
REF Input Resistance
GAMMA OUTPUTS (Note 4)
Short-Circuit Current
Maximum Capacitive Load
Output Impedance
Load Regulation
Total Output Error
Slew Rate
V
AVDD_MTP
V
DVDD
MAX9665
I
AVDD
I
DVDD
UVLO
MAX9666
MAX9667
No SCL or SDA transitions
15
2.7
12
14
16
450
2.3
10
20
3.6
22
24
26
900
2.6
V
V
mA
µA
V
Bits
INL
DNL
T
A
= +25°C, 16
≤
CODE
≤
1008
T
A
= +25°C, 16
≤
CODE
≤
1008
384
1
1
LSB
LSB
kΩ
mA
pF
kΩ
mV/mA
I
SC
Z
O
R
EG
SR
Output to AVDD or GND, T
A
= +25°C
Placed directly at output
Output resistance when output is disabled
-5mA to +5mA
T
A
= +25°C, measured at code = 512
5V swing, measure 10% to 90%
100
400
300
84
0.5
-40
22
+40
mV
V/µs
2
_______________________________________________________________________________________
6/8/10-Channel, 10-Bit, Nonvolatile Programmable
Gamma and VCOM Reference Voltages
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
REF
= 15.7V, V
DVDD
= 3.3V, V
GND
= 0V, VCOM connected to FB, CTL = DVDD/2, no load, T
A
= -40°C to +85°C, unless
otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
Low Output Voltage
High Output Voltage
SYMBOL
V
MIN
V
MAX
CONDITIONS
Sinking 4mA, T
A
= +25°C
Sourcing 4mA, T
A
= +25°C
To AVDD, f = 60kHz, REF and AVDD shorted
9V < V
AVDD
< 20V, V
REF
= 9V
f = 5MHz, all channels to all channels
Outputs to AVDD or GND, T
A
= +25°C
Placed directly at output
Z
O
R
EG
Output resistance when output is disabled
-5mA to +5mA
T
A
= +25°C, measured at code = 512
SR
V
MIN
V
MAX
PSRR
Swing 5V
P-P
at input, 10% to 90%
measurement on output
Sinking 4mA
Sourcing 4mA
To AVDD, f = 60kHz, REF and AVDD shorted
9V < V
AVDD
< 20V, V
REF
= 9V
60
V
AVDD
-
0.2
-40
22
0.15
V
AVDD
- 0.15
40
90
160
15
C
XTLK
I
SC
Z
O
R
EG
f = 5MHz, all channels to all channels
Outputs to AVDD or GND, T
A
= +25°C
Placed directly at output
Output resistance when output is disabled
-5mA to +5mA
T
A
= +25°C, measured at code = 512
SR
V
MIN
V
MAX
PSRR
Swing 4V
P-P
at VCOM, 10% to 90%,
R
L
= 10kΩ, C
L
= 50pF (Note 6)
Sinking 4mA
Sourcing 4mA
To AVDD, f = 60kHz, REF and AVDD shorted
9V < V
AVDD
< 20V, V
REF
= 9V
70
V
AVDD
- 0.2
-50
50
80
200
300
84
±0.2
1
100
0.15
V
AVDD
- 0.15
40
0.2
+50
0.2
50
60
V
AVDD
- 0.15
MIN
TYP
0.1
V
AVDD
- 0.1
40
90
80
200
300
84
0.50
+40
MAX
0.15
UNITS
V
V
MAX9665/MAX9666/MAX9667
Power-Supply Rejection Ratio
Channel-to-Channel Isolation
GAMMA OUTPUTS (Note 5)
Short-Circuit Current
Maximum Capacitive Load
Output Impedance
Load Regulation
Total Output Error
Slew Rate
Low Output Voltage
High Output Voltage
Power-Supply Rejection Ratio
Thermal Shutdown
Thermal-Shutdown Hysteresis
Channel-to-Channel Isolation
VCOM OUTPUT
Short-Circuit Current
Maximum Capacitive Load
Output Impedance
Load Regulation
Total Output Error
Slew Rate
Low Output Voltage
High Output Voltage
Power-Supply Rejection Ratio
PSRR
C
XTLK
I
SC
dB
dB
mA
pF
kΩ
mV/mA
mV
V/µs
V
V
dB
°C
°C
dB
mA
pF
kΩ
mV/mA
mV
V/µs
V
V
dB
_______________________________________________________________________________________
3
6/8/10-Channel, 10-Bit, Nonvolatile Programmable
Gamma and VCOM Reference Voltages
MAX9665/MAX9666/MAX9667
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
REF
= 15.7V, V
DVDD
= 3.3V, V
GND
= 0V, VCOM connected to FB, CTL = DVDD/2, no load, T
A
= -40°C to +85°C, unless
otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
SINGLE-WIRE INTERFACE
CE Input Low Voltage
CE Input High Voltage
CE Startup Time
CTL High Voltage
2.6V < V
DVDD
< 3.6V
2.6V < V
DVDD
< 3.6V
(Note 7)
2.6V < V
DVDD
< 3.6V
0.7 x
V
DVDD
0.4 x
V
DVDD
0.2 x
V
DVDD
20
50
200
10
CTL = GND
CTL = DVDD
0.7 x
V
DVDD
0.3 x
V
DVDD
V
SDA/SCL
= 0V or V
DVDD
(Note 7)
I
SDA/SCL
V
OL
V
DVDD
= 0V, V
SDA/SCL
= 1.98V
I
SINK
= 6mA
-10
-10
+0.01
5
+10
0.4
+10
-10
+10
0.7 x
V
DVDD
1
0.82 x
V
DVDD
0.62 x
V
DVDD
0.32 x
V
DVDD
0.3 x
V
DVDD
V
V
ms
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CTL Float Votlage
2.6V < V
DVDD
< 3.6V
V
CTL Low Voltage
CTL Rejected Pulse Width
CTL Typical Pulse Width
CTL Minimum Pulse Width
CTL Minimum Time Between Pulses
CTL Input Current
LOGIC INPUTS AND OUTPUTS (SDA, SCL)
Input High Voltage
Input Low Voltage
Input Leakage Current
Input Capacitance
Power-Down Input Current
SDA Output Low Voltage
V
IH
V
IL
I
IH
, I
IL
2.6V < V
DVDD
< 3.6V
V
µs
µs
µs
µs
µA
V
V
µA
pF
µA
V
4
_______________________________________________________________________________________
6/8/10-Channel, 10-Bit, Nonvolatile Programmable
Gamma and VCOM Reference Voltages
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD
= V
REF
= 15.7V, V
DVDD
= 3.3V, V
GND
= 0V, VCOM connected to FB, CTL = DVDD/2, no load, T
A
= -40°C to +85°C, unless
otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
Serial-Clock Frequency
Bus Free Time Between STOP
and START Conditions
Hold Time (Repeated) START
Condition
SCL Pulse-Width Low
SCL Pulse-Width High
Setup Time for a Repeated
START Condition
Data Hold Time
Data Setup Time
SDA and SCL Receiving Rise
Time
SDA and SCL Receiving Fall
Time
SDA Transmitting Fall Time
Setup Time for STOP Condition
Bus Capacitance
Pulse Width of Suppressed Spike
SYMBOL
f
SCL
t
BUF
t
HD,STA
t
LOW
t
HIGH
t
SU,STA
t
HD,DAT
t
SU,DAT
t
R
t
F
t
F,TX
t
SU,STO
C
B
t
SP
0
(Note 8)
(Note 8)
(Note 8)
CONDITIONS
MIN
0
1.3
0.6
1.3
0.6
0.6
0
100
20 +
0.1C
B
20 +
0.1C
B
20 +
0.1C
B
0.6
400
50
300
300
250
900
TYP
MAX
400
UNITS
kHz
µs
µs
µs
µs
µs
ns
ns
ns
ns
ns
µs
pF
ns
I
2
C TIMING CHARACTERISTICS (Figure 4)
MAX9665/MAX9666/MAX9667
Note 2:
All devices are 100% production tested at T
A
= +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. R
F
= R
IN
= 10kΩ.
Note 7:
Guaranteed by design. Not production tested.
Note 8:
C
B
is in pF.
_______________________________________________________________________________________
5
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