Datasheet

LTC6406
21
6406fc
Figure 11. Interfacing the LTC6406 to an ADC
0.1μF
–
+
1
SHDN
5 6
–IN
7
+OUT
8
+OUTF
16 15
+INNC
14
–OUT
13
–OUTF
+INA
–INA
150Ω
2
V
+
3
V
–
V
+
V
+
V
–
3.3V
V
OCM
V
OCM
12
V
–
11
V
+
10
V
+
9
V
–
V
–
V
–
6406 F11
LTC6406
LTC2208
V
IN
, 2V
P-P
SHDN
150Ω
150Ω
150Ω
0.1μF
3.3V
4
0.1μF
0.1μF
CONTROL
GND
V
DD
D15
•
•
D0
0.1μF
V
CM
2.2μF
3.3V
1μF 1μF
V
TIP
100k
1.8pF
1.8pF
1.25pF
1.25pF
1.25pF
50Ω
50Ω
APPLICATIONS INFORMATION
from properly dampening the load transient caused by
the sampling process, prolonging the time required for
settling. In 16-bit applications, this will typically require
a minimum of 11 R-C time constants. It is recommended
that the capacitor chosen have a high quality dielectric
(such as C0G multilayer ceramic).
TYPICAL APPLICATION
DC-Coupled Level Shifting of Demodulator Output
LTC2249
14-BIT ADC
80MHz
SAMPLE
CLOCK
3.3V
6406 TA02
10dBm
R9
10Ω
C8
22pF
C7
22pF
C6
22pF
C2
10pF
C1
10pF
RF IN
900MHz
–3dBm
C3
12pF
R10
10Ω
R7
49.9Ω
R5
475Ω
R6
475Ω
C5
1.8pF
C4
1.8pF
DIFF OUTPUT Z
130Ω
\\ 2.5pF
DC LEVEL
1.25V
DC LEVEL
3.9V
DC LEVEL
3.3V
GAIN: 10dB
INPUT NF: 18dB
OIP3: 44dBm
SEE DN418 FOR MORE INFORMATION
GAIN: 3dB
INPUT NF: 13dB
OIP3: 31dBm
R8
49.9Ω
R3
75Ω
R4
75Ω
R1
75Ω
R2
75Ω
0dBm
IDENTICAL
Q CHANNEL
5V
5pF
65Ω
5pF
65Ω
–
+
+
–
3.3V
LTC6406
V
OCM
1.25V
5V
I
5V
5pF
65Ω
5pF
65Ω
5V
Q
5V
LT5575