Analog Devices EVAL-ADIN1200 User Manual page 20

UG-1673
100Ω DIFFERENTIAL;
5 MIL TRACES, 10 MIL SPACING ( 5 / 10 / 5 );
MATCH AND MINIMIZE TRACE LENGTH
MDI_1_N
1 TD+
TCT1
2 TDCT
MDI_1_P
3 TD–
MDI_0_N
6 RD+
TCT0
7 RDCT
MDI_0_P
8 RD–
DNI
PLACEHOLDERS FOR ADDITIONAL DECOUPLING
ALONG THE SUPPLY TRACE
EXT_5V
C33 C45
0.01µF 0.01µF
DNI DNI
MAX INPUT VOLTAGE = 5.5V
P4
1A
1B
3
2
EXT_5V
1
2
C31
1803277 4.7µF
T1
TRANSMIT
TX+ 16
TXCT 15
MCT0
TX– 14
RECEIVE
RX+ 11
RXCT 10
MCT1
RX– 9
HX1260NL
R2
MCT0
75Ω
R3
MCT1
75Ω
C99
0.01µF
DNI
ADP223: PLACE VIN AND VOUT CAPACITORS AS CLOSE AS POSSIBLE TO THE PINS
ADP223: MAX VIN = 5.5V
SUPPLY
DNI
E2
EXT_5V
21
C47
1kΩ
4.7µF
VOUT1 = AVDD3P3 = 0.5(1 + 280K/50K)
VOUT2 = VDDIO = 3.3V = 0.5(1 + 280K/50K)
VOUT2 = VDDIO = 2.5V = 0.5(1 + 200K/50K) (DEFAULT)
VOUT2 = VDDIO = 1.8V = 0.5(1 + 130K/50K)
EVAL-ADIN1200FMCZ
100Ω DIFFERENTIAL;
5 MIL TRACES, 10 MIL SPACING ( 5 / 10 / 5 );
MATCH AND MINIMIZE TRACE LENGTH
CON-MDI_1_P
PAIR A
CON-MDI_1_N
CON-MDI_0_P
PAIR B
CON-MDI_0_N
R4
75Ω
C4
0.001µF
C39
0.001µF
Figure 38. Magnetics
U4
C48
ADP223ACPZ
4.7µF
1
EN1
2
EN2 7
6 VOUT1
VIN 5
8 VOUT2
ADJ1
4
C44
ADJ2
GND PAD 4.7µF
3 P A D
Figure 39. Power Supplies
Rev. 0 | Page 20 of 29
CONNECTIONS OF TRANSFORMER TO RJ45
ARE CONFIGURED FOR OPTIMUM LAYOUT
P1
1
2
3
4
5
6
7
8
R5
9 SHLD
75Ω
PINS
10
5406299-1
SHIELD
DNI
1
20054
AVDD3P3
INSERTED
69157-102HLF
L3
R67
0Ω
10nH
DNI
R11
280kΩ
RESISTOR FOOTPRINT CAN BE USED
FOR CURRENT MEASUREMENTS
R12 VDDIO
50kΩ
INSERTED
69157-102HLF
L1
R65
0Ω
10nH
DNI
R16
200kΩ
VDDIO DEFAULT IS 2.5V
CHANGE R16 TO 280K FOR VDDIO = 3.3V
CHANGE R16 TO 130K FOR VDDIO = 1.8V
R52
50kΩ
User Guide
AVDD3P3
VDDIO