Datasheet

VCA261xEVM
4
SBOU015A
www.ti.com
V
DD
A
1
NC
2
NC
3
VCA
IN
4
VCA
IN
5
LNP
OUT
NA
6
LNP
OUT
PA
7
SWFBA
8
FBA
9
COMP1A
10
COMP2A
11
LNP
IN
NA
12
LNP
GS3
A
13
LNP
GS2
A
14
LNP
GS1
A
15
LNP
IN
PA
16
V
DD
R
17
V
BIAS
18
V
CM
19
GNDR
20
LNP
IN
PB
21
LNP
GS1
B
22
LNP
GS2
B
23
LNP
GS3
B
24
LNP
IN
NB
25
COMP2B
26
COMP1B
27
FBB
28
SWFBB
29
LNP
OUT
PB
30
LNP
OUT
NB
31
VCA
IN
32
VCA
IN
33
NC
34
NC
35
V
DD
B
36
GNDB
37
VCA
OUT
NB
38
VCA
OUT
PB
39
MGS 3
40
MGS 2
41
MGS 1
42
VCA
CNTL
43
VCA
IN
SEL
44
FBSW
CNTL
45
VCA
OUT
PA
46
VCA
OUT
NA
47
GNDA
48
U2
VCA261x
4 6
3 2 1 T2
T1-1T-KK81_XFMR
4 6
3 2 1T1
T1-1T-KK81_XFMR
R15
10kΩ
1 2 3 4 5
10
9 8 7 6
S1 SW DIP-5
R16
10kΩ
R17
10kΩ
R18
10kΩ
R19
10kΩ
1
2
3 4 5
J5 VCA CNTL
+5V
−5V
+5V
SW5 SW6
SW4 SW3
1
2
3
4
5
J2
1
2
3
4
5
J8
C32 0.01µF
C19 0.01µF
+
C23 1µF
+
C31 1µF
C21
0.1µF
C30 0.1µF
13
2
JP1
1 3
2
JP2
1
2
3
4
5
J3
1
2
3
4
5
J6
R8 549Ω
C11 1000pF
R7 549Ω
C2 1000pF
C13
56pF
C3 56pF
+
C28 1µF
+
C26 1µF
+
C25 1µF
+5DUT
C22 0.01µF
C27 0.01µF
C5
4.7pF
C10
4.7pF
C20
Not Installed
C29
Not Installed
C12 0.01µF
C4 0.01µF
-
4
+
3
V+
5
V−
2
1
U3 OPA642N
1 2
J4
1 2 3
J7 CON_3TERM_SCREW
+
C34 10µF
+
C38 10µF
+
C24 10µF
+5V
–5V
+5DUT
C9
330pF
C8
330pF
SW7 SW8
R12 169Ω
R11 169Ω
R10 332Ω R9 499Ω
C33 0.1µF
+
C36 2.2µF
C35 0.1µF
+
C37 2.2µF
R13 250Ω
R14 49.9Ω
C14 0.1µF
1
2
3
4
5
J9
R6 332Ω R5 499Ω
C7
330pF
C6
330pF
R1 49.9Ω
C1 0.1µF
1
2
3
4
5
J1
SW2 SW1
R2 250Ω
R4 169Ω
R3 169Ω
C18 0.1µF C16 0.1µF
+
C15 2.2µF
+
C17 2.2µF
−5V
+5V
-
4
+
3
V+
5
V−
2
1
U1
OPA642N
TP2
TP1
+5DUT +5DUT
TP3
TP4
TP5 TP6
TP7 TP8
A
A
B
B
2 2
2 2
2 2
2 2
1 1
1 1
1 1
1 1
(See Note 1)(See Note 1)
OUT B
VCAIN
B
LNPIN
B
LNPIN
A
VCAIN
A
OUT
A
FIGURE 1. Schematic.