Datasheet

LTC6400-14
14
640014fb
TYPICAL APPLICATIONS
Demo Circuit 987B Schematic (Test Circuit A)
• •
T1
(2)
• •
• •
T3
TCM 4-19
1:4
VERSION IC R3 R4 T1 SL1 SL2 SL3
T4
TCM 4-19
1:4
• •
T2
TCM 4-19
-B LTC6400CUD-14 OPEN OPEN MINI-CIRCUITS TCM4-19 (1:4) 6dB 14dB 8dB
640014 TA03
R10
86.6Ω
R8
(1)
R7
(1)
R9
86.6Ω
C3
0.1μF
C4
0.1μF
C1
0.1μF
C2
0.1μF
LTC6400-14
V
OCM
V
+
V
+
V
–
V
–
V
+
V
CC
V
CC
V
–
ENABLE
+IN
+IN
–IN
–IN –OUT
+OUTF
–OUTF
+OUT
ENABLE DIS
12 11 10 9
1234
5
6
7
8
16
15
14
13
SL1
(2)
SL2
(2)
J2
–IN
J1
+IN
J5
–OUT
SL3
(2)
J4
+OUT
C22
0.1μF
C21
0.1μF
C18
0.1μF
C13
0.1μF
C17
1000pF
R16
0Ω
TP2
V
CC
2.85V TO 3.5V
13
2
JP1
V
CC
V
CC
V
CC
C12
1000pF
C9
1000pF
C10
0.1μF
C15
1μF
V
CC
C14
4.7μF
C7
0.1μF
R4
(2)
1
3
2
3
1
2
5
4
4
5
TP5
V
OCM
R2
(1)
R1
0Ω
R3
(2)
J6
TEST IN
C19
0.1μF
1
3
2
5
4
C20
0.1μF
R21
(1)
R22
(1)
R20
1k
R19
1.5k
R14
(1)
R13
0Ω
C6
0.1μF
C5
0.1μF
C24
0.1μF
C23
0.1μF
J7
TEST OUT
NOTE: UNLESS OTHERWISE SPECIFIED.
(1) DO NOT STUFF.
(2)
SL = SIGNAL LEVEL
SL LEVELS DO NOT INCLUDE TRANSFORMER LOSS IN T1 AND T2
3
1
2
4
5
TP3
GND
R17
0Ω
R25
0Ω
R18
0Ω
R26
0Ω
R12
0Ω
R11
(1)
R24
(1)
R6
0Ω
R5
(1)
0dB
network analyzer. There are also series resistors at the
output to present the LTC6400 with a 375Ω differential
load, optimizing distortion performance. Due to the input
and output transformers, the –3dB bandwidth is reduced
from 2.4GHz to approximately 1.8GHz.
Test Circuit B uses a 4-port network analyzer to measure
S-parameters and gain/phase response. This removes the
effects of the wideband baluns and associated circuitry,
for a true picture of the >1GHz S-parameters and AC
characteristics.
APPLICATIONS INFORMATION