Texas Instruments ADS5120EVM, Руководство пользователя, Страница: 6 / 22

ADS5120EVM
6
SBAU078 www.ti.com
FIGURE 1. EVM Schematic Diagram (1 of 5).
REFT
REFT
J3
REFT
K3
REFB
REFB
J5
REFB
K5
REFB
L5
REFT
L1
BG
K1
IREFR
K6
CML
L2
CML
L3
IREFN
L6
IREFL
M1
CLK
W9
PD_REF
V9
OE
P10
N/C
K2
N/C
E2
N/C
E1
DCASEL
N2
N/C
W5
N/C
U6
STBYA
W10
STBYB
P9
STBYC
R9
STBYD
U9
STBYE
C8
STBYF
B8
STBYG
A8
STBYH
A9
U1A
257BGA_ADS5120
C4 1
µ
F
C5 2.
2
µ
F
+5VA
R15 2.49K
R13 1K
R8 1K
1
2
3
R14 1K
R17 10K
C8 0.
µ
F
R19 100
C10 0.1
µ
F
C11 470pF
C12 0.047
µ
F
C9 0.1
µ
F
+5VA
R21 49.9
R23 2.0K
W3
W4
C14 0.01
µ
F
C16 1
µ
F
REFT
R18
10K
R26 475
R25 953
C15
0.01
µ
F
C17 1
µ
F
C1 0.1
µ
F
C2 470pF
–
5VA
REFB
EXT_CML
2 3
1
4 11
U2A OPA4227UA
5 6
7
U2B
OPA4227UA
10
9
8
U2C
OPA4227UA
TP1 TP2
+
C6 10
µ
F
+
C3
10
µ
F
1
2
3
R16 1K
+
C7 10
µ
F
R20 100
C13 0.047
µ
F
R22 49.9
R24 2.0K
0.1%
0.1%
C20 0.1
µ
F
R29
10K
R27 475
1
2
3
R28 1K
+
C19
10
µ
F
R30 100
C21 0.047
µ
F
R31 49.9
R32 2.0K
0.1%
TP3
EN
3
BYPASS
4
OUT
5
GND
2
IN
1
U3
TPS79225
C18 0.01
µ
F
+2.5V
(1.25V TYP)
(0.75V TYP)
(1V TYP)
R1 4.7K
4.7K
4.7K
4.7K
4.7K
4.7K
4.7K
4.7K
R2
R3
R4
R5
R6
R7
1
3
2
W1
1
3
2
W2
DRVDD
DR
VDD
CML
CML
1
2
3
4
5
J1
INPUT CLOCK
R10 49.9
CLK
R11 0
R9 0
(1)
DRVDD
12 13
14
U2D
OPA4227UA
R97
R98
0
(1)
1
3
2
W32
EXT_CML
R12
6.19K
R99
0
(1)
ADC_CML
DVDD
1 3
2
W22
R102 3.01K
R101
1K
+5VA
REFT
REFT
C233 1
µ
F
C234 0.1
µ
F
1 2 3
8
4
7 6 5
S1
SWITCH_4POS_SMT SWITCH_4POS_SMT
1 2 3
8
4
7 6 5
S10
E1
NOTE: (1) Part not installed.
3
1
2
SJP1
R41 100K
AVDD