ltc6400cud-26-trpbf Linear Technology Corporation, ltc6400cud-26-trpbf Datasheet - Page 14

• Manufacturer Part Number: ltc6400cud-26-trpbf
• Description: 1.8ghz Low Noise, Low Distortion Differential Adc Driver For 300mhz If
• Manufacturer: Linear Technology Corporation

APPLICATIONS INFORMATION
2.85V TO 3.5V
LTC6400-20
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 1.8GHz to approximately 1.3GHz.
TYPICAL APPLICATIONS
14
TEST IN
V
GND
OCM
TP5
TP2
TP3
V
+IN
–IN
CC
J1
J2
J6
0dB
R6
0Ω
R5
(1)
R17
R25
0Ω
0Ω
C14
4.7μF
R2
(1)
R1
0Ω
5
4
5
4
TCM 4:19
V
CC
(2)
1:4
T1
T3
C15
1μF
1
2
3
1
2
3
0.1μF
C19
(2)
V
R4
(2)
R20
1k
SL = SIGNAL LEVEL
CC
VERSION
R3
(2)
R19
1.5k
-C
0.1μF
C21
Demo Circuit 987B Schematic (Test Circuit A)
LTC6400CUD-20 OPEN OPEN MINI-CIRCUITS TCM4-19 (1:4)
0.1μF
0.1μF
C2
C1
0.1μF
0.1μF
C23
C24
V
R24
ENABLE
(1)
CC
IC
C10
0.1μF
SL1
(2)
1
2 JP1
13
14
15
16
R3
3
+IN
+IN
–IN
–IN
V –
V
DIS
C9
1000pF
+
R16
12
1
R4
0Ω
R21
(1)
ENABLE
V
LTC6400-20
OCM
V
11
2
CC
C7
0.1μF
0.1μF
0.1μF
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 cir-
cuitry, for true picture of the >1GHz S-parameters and
AC characteristics.
C5
C6
V
V
V
CC
+
+
10
3
+OUTF
–OUTF
T1
+OUT
–OUT
V –
V –
C17
1000pF
C12
1000pF
9
4
8
7
6
5
R22
(1)
86.6Ω
86.6Ω
R10
V
R8
(1)
R7
(1)
R9
CC
SL1
6dB
C18
0.1μF
C13
0.1μF
20dB
SL2
0.1μF
0.1μF
C4
C3
14dB
SL3
0.1μF
SL2
(2)
C20
C22
0.1μF
3
2
1
3
2
1
NOTE: UNLESS OTHERWISE SPECIFIED.
(1) DO NOT STUFF.
TCM 4:19
1:4
T2
T4
R14
R13
0Ω
(1)
4
5
4
5
R18
R26
0Ω
0Ω
R12
R11
0Ω
(1)
640020 TA03
J4
+OUT
SL3
(2)
J5
–OUT
J7
TEST OUT
640020f