Evaluation Board Layout; Functional Blocks - Analog Devices ADD8754-EVAL Manual

EVALUATION BOARD LAYOUT

FUNCTIONAL BLOCKS

BLOCK 1
BLOCK 2
BLOCK 10
BLOCK 3
Table 4. Evaluation Board Functional Block Descriptions
Block Description
1 Positive Charge Pump. Provides access to the positive charge pump output (VCPH) and ground.
2 Gate Pulse Modulation. Accepts digital inputs from the timing controller (TCON) and provides a modulated VGH waveform (VGH_M).
3 VCOM Amplifiers. Provides access to the VCOM amplifier. The potentiometer in Block 9 adjusts the VCOM voltage.
4 AD5259 Serial Port. Accepts a serial port. Only boards with the optional AD5259 digital potentiometer include this port.
5 LDO. Provides access to the LDO output.
6 Digital Potentiometer. For digital control of the AD5259. Only boards equipped with the optional AD5259 use this pin.
7 Power Supply. Accepts an input voltage and provides the step-up output voltage (BOOST_OUT) and various ground pins.
8 Negative Charge Pump. Provides access to the negative charge pump output (VCPL) and ground.
9 VCOM Potentiometer. Includes one analog potentiometer configured in a rheostat mode for VCOM adjustment.
10
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.
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