Setting Up The Evaluation Board; Part Placement In Socket; Factory Settings - Analog Devices EVAL-ADD8504 Quick Start Manual

SETTING UP THE EVALUATION BOARD

To begin using the ADD8504/ADD8505/ADD8506 evaluation
board:
1. Use existing, or modify, Gamma Resistor RA1 to Gamma
Resistor RA7, and Gamma Resistor RB1 to Gamma
Resistor RB7 in Block 2 (see Figure 4).
2. Install the ADD8504/ADD8505/ADD8506 in the socket in
Block 3, see Figure 4. Read the Part Placement in Socket
section for proper part placement and refer to Figure 4 for
the ADD8504/ADD8505/ADD8506 evaluation board
layout.
3. Connect a +5 V power supply to at least one of the three
pins labeled VCC, and connect ground to at least one of
the three pins labeled GND in Block 5 (see Figure 4).
If the above list is complete, the user can probe the input and
output voltages. To switch between the two gamma resistor
strings, connect a switching signal to Pin A/B or toggle the
hardware switch (SW1) between Position A and Position B
(refer to Figure 4).

PART PLACEMENT IN SOCKET

The ADD8504/ADD8505/ADD8506
respectively. To properly place the part in the socket refer to
Figure 2.
ADD8504
The ADD8504 uses Socket Pin 3 to Socket Pin 10, and Socket
Pin 15 to Socket Pin 22. Only Input/Output 2 through Input/
Output 5 are used on the evaluation board. Power and ground
pins are unaffected. Refer to the
data sheet for proper pin designations for the ADD8504.
ADD8505
The ADD8505 uses Socket Pin 1 to Socket Pin 10, and Socket
Pin 15 to Socket Pin 24. Only Input/Output 1 through Input/
Output 5 are used on the evaluation board. Power and ground
pins are unaffected. Refer to the
data sheet for proper pin designations for the ADD8505.
have 16, 20, and 24 pins,
ADD8504/ADD8505/ADD8506
ADD8504/ADD8505/ADD8506
EVAL-ADD8504/ADD8505/ADD8506
ADD8506
The ADD8506 fills the socket and uses all input/output pins of
the evaluation board.
INA1
INB1
INA2
INB2
INA3
INB3
INA4
INB4
INA5
INB5
INA6
INB6

FACTORY SETTINGS

The ADD8504/ADD8505/ADD8506
configured with one 20 kΩ resistor and thirteen 10 kΩ resistors
filling the two gamma resistor strings, for a total of 14 resistors
labeled RA1 to RA7 and RB1 to RB7 as shown in Figure 4. The
20 kΩ resistor is labeled RA1 and serves to differentiate the two
resistor strings to make the outputs change significantly; output
voltages are listed in Table 1.
The board is shipped with an
All six output load resistors are jumpered (0 Ω resistors), and all
six output load capacitors are 1 nF.
Table 1. Factory Settings
OUTPUT PIN
OUT1_L
OUT2_L
OUT3_L
OUT4_L
OUT5_L
OUT6_L
1
Ideal voltages may differ slightly (±2%).
Rev. 0 | Page 3 of 8
VCC1
1 24
ADD8505
OUT1
2 23
OUT2
3 22
OUT3
4 21
VCC2
5 20
A/B
6 19
ADD8504
GND
7 18
GND
8 17
OUT4
9 16
OUT5
10 15
OUT6
11 14
ADD8506
VCC3
12 13
Figure 2. Part Placement in Socket
evaluation board is pre-
ADD8506 in the TSSOP socket.
1
GAMMA A GAMMA B
3.750 V 0.714 V
3.125 V 1.429 V
2.500 V 2.143 V
1.875 V 2.857 V
1.250 V 3.571 V
0.625 V 4.286 V