Pin Description - AOC LM-700 Service Manual

1.3 Pin Description

Unless otherwise stated, unused input pins must be tied to ground, and unused output pins left open.
PIN # Name
77 ADC_VDD2
78 ADC_GND2
79 ADC_VDD1
80 ADC_GND1
81 SUB_GNDA
82 ADC_GNDA
84 ADC_VDDA
83 Reserved
85 ADC_BGNDA
88 ADC_BVDDA
86 BLUE-
87 BLUE+
89 ADC_GGNDA
92 ADC_GVDDA
90 GREEN-
91 GREEN+
93 ADC_RGNDA
96 ADC_RVDDA
94 RED-
95 RED+
Table 1 : Analog-to-Digital Converter
I/O Description
Digital power for ADC encoding logic. Must be bypassed with 0.1uF capacitor to
pin 78 (ADC_GND2)
Digital GND for ADC encoding logic. Must be directly connected to the digital
system ground plane.
Digital power for ADC clocking circuit. Must by passed with 0.1uF capacitor to
pin 80 (ACD_GND1).
Digital GND for ADC clocking circuit. Must be directly connected to the digital
system ground plane.
Dedicated pin for substrate guard ring that protects the ADC reference system.
Must be directly connected to the analog system ground plane.
Analog ground for ADC analog blocks that are shared by all three channels.
Includes bandgap reference, master biasing and full scale adjust. Must be directly
connected to analog system ground plane.
Analog power for ADC analog blocks that are shared by all three channels.
Includes bandgap reference, master biasing and full scale adjust. Must be
bypassed with 0.1uF capacitor to pin 82 (ADC_GNDA).
For internal testing purpose only. Do not connect.
Analog ground for the blue channel. Must be directly connected to the analog
system ground plane.
Analog power for the blue channel. Must be bypassed with 0.1uF capacitor to pin
85(BGNDA).
Negative analog input for the Blue channel.
I
Positive analog input for the Blue channel.
I
Analog ground for the green channel. Must be directly connected to the analog
system ground plane.
Analog power for the green channel. Must be bypassed with 0.1uF capacitor to
pin 89 (ADC_GGNDA).
Negative analog input for the Green channel.
I
Positive analog input for the Green channel.
I
Analog ground for the red channel. Must be directly connected to the analog
system ground plane.
Analog power for the red channel. Must be bypassed with 0.1uF capacitor to pin
93 (ADC_RGNDA).
Negative analog input for the Red channel.
I
Positive analog input for the Red channel.
I
39
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