ADD8754-EVAL AD [Analog Devices], ADD8754-EVAL Datasheet - Page 7

• Manufacturer Part Number: ADD8754-EVAL
• Description: Evaluation Kit for LCD Power, VCOM, and Gate Modulation
• Manufacturer: AD [Analog Devices]

EVALUATION BOARD LAYOUT
FUNCTIONAL BLOCKS
Table 4. Evaluation Board Functional Block Descriptions
Block
1
2
3
4
5
6
7
8
9
10
BLOCK 10
BLOCK 1
BLOCK 2
BLOCK 3
Description
Positive Charge Pump. Provides access to the positive charge pump output (VCPH) and ground.
Gate Pulse Modulation. Accepts digital inputs from the timing controller (TCON) and provides a modulated VGH waveform (VGH_M).
VCOM Amplifiers. Provides access to the VCOM amplifier. The potentiometer in Block 9 adjusts the VCOM voltage.
AD5259
LDO. Provides access to the LDO output.
Digital Potentiometer. For digital control of the AD5259. Only boards equipped with the optional AD5259 use this pin.
Power Supply. Accepts an input voltage and provides the step-up output voltage (BOOST_OUT) and various ground pins.
Negative Charge Pump. Provides access to the negative charge pump output (VCPL) and ground.
VCOM Potentiometer. Includes one analog potentiometer configured in a rheostat mode for VCOM adjustment.
ADD8754. Includes a soldered ADD8754 24-lead LFCSP. If the part needs to be replaced, care should be taken to properly solder
the thermal vias to the thermal pad on the bottom side of the IC.
Serial Port. Accepts a serial port. Only boards with the optional AD5259 digital potentiometer include this port.
BLOCK 4
Figure 6. Evaluation Board Layout
Rev. A | Page 7 of 12
ADD8754-EVAL
BLOCK 8
BLOCK 7
BLOCK 9
BLOCK 6
BLOCK 5