MAX9673 Просмотр технического описания (PDF) - Maxim Integrated
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MAX9673 Datasheet PDF : 24 Pages
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10-Bit, Programmable Gamma Reference
Systems with MTP for TFT LCDs
MAX9672
1, 26, 27, 28
—
2
3
4
5
6
7
8
9
10, 21
11
12
13
14
15
16
17
18
19
20
22
23
24
25
—
—
—
—
PIN
MAX9673
1, 28
—
2
3
4
5
6
7
8
9
10, 21
11
12
13
14
15
16
17
18
19
20
22
23
24
25
26
27
—
—
Pin Description
MAX9674
—
1
2
3
4
5
6
7
8
9
10, 21
11
12
13
14
15
16
17
18
19
20
22
23
24
25
26
27
28
—
NAME
FUNCTION
N.C.
GMA16
SCL
SDA
A0
DVDD
AGND_AMP
VCOM
VCOM_FB
AVDD_AMP
AVDD
GND
GMA1
GMA2
GMA3
GMA4
GMA5
GMA6
GMA7
GMA8
REF
GMA9
GMA10
GMA11
GMA12
GMA13
GMA14
GMA15
EP
No Connection. Not internally connected.
Gamma DAC Analog Output 16
I2C-Compatible Serial-Clock Input
I2C-Compatible Serial-Data Input/Output
I2C-Compatible Device Address Bit 0
Digital Power Supply. Bypass DVDD with a 0.1µF capacitor to GND.
Ground for VCOM Amplifier
VCOM Output
Feedback for VCOM Amplifier
Power Supply for VCOM Amplifier. Bypass AVDD_AMP with a 0.1µF
capacitor to AGND_AMP.
Analog Power Supply. Bypass AVDD with a 0.1µF capacitor to GND.
Analog Ground
Gamma DAC Analog Output 1
Gamma DAC Analog Output 2
Gamma DAC Analog Output 3
Gamma DAC Analog Output 4
Gamma DAC Analog Output 5
Gamma DAC Analog Output 6
Gamma DAC Analog Output 7
Gamma DAC Analog Output 8
DAC Reference Input
Gamma DAC Analog Output 9
Gamma DAC Analog Output 10
Gamma DAC Analog Output 11
Gamma DAC Analog Output 12
Gamma DAC Analog Output 13
Gamma DAC Analog Output 14
Gamma DAC Analog Output 15
Exposed Pad. EP is internally connected to the analog ground and
digital ground. EP must be connected to the system’s ground.
Detailed Description
The MAX9672/MAX9673/MAX9674 feature 13/15/17
total programmable reference voltage channels. Each
channel has a 10-bit DAC to create the reference volt-
age. One channel has an amplifier that follows the DAC
while all other channels have a buffer after the DAC.
The MAX9672/MAX9673/MAX9674 feature integrated
MTP memory to store gamma and VCOM values on the
chip, eliminating the need for external EEPROM. The
MAX9672/MAX9673/MAX9674 support up to 300 write
operations to the on-chip nonvolatile memory.
The MAX9672/MAX9673/MAX9674 can provide the
gamma, VCOM, and possibly level-shifter reference
voltages for an LCD panel that can potentially replace a
discrete digital variable resistor (DVR), VCOM amplifier,
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