Datasheet

LTC6409
21
6409fa
Typical applicaTions
DC-Coupled Level Shifting of an I/Q Demodulator Output
6409 TA02
C2
10pF
C1
10pF
RF IN
1900MHz
–10dBm
200mV
P-P
C3
12pF
R5
620Ω
R6
620Ω
C5
0.9pF
C4
0.9pF
DIFF OUTPUT Z
130Ω
| | 2.5pF
DC LEVEL
1.25V
DC LEVEL
3.9V
DC LEVEL
3.4V
GAIN: 12.3dBGAIN: 1.1dB
R3
75Ω
R4
75Ω
R1
75Ω
R2
75Ω
–OUT
+OUT
IDENTICAL
Q CHANNEL
5V
5pF
65Ω
5pF
65Ω
–
+
+
–
5V
LTC6409
V
OCM
1.25V
5V
I
5V
5pF
65Ω
5pF
65Ω
5V
Q
5V
LT5575
LO
1920MHz
0dBm
–8.9dBm
227mV
P-P
3.4dBm
936mV
P-P
Single-Ended to Differential Conversion Using LTC6409 and 50MHz Lowpass Filter (Only One Channel Shown)
LTM9011-14
F3
F1
F2
C1
C2
B3
B1
B2
V
CM12
A
IN2
+
A
IN2
–
A
IN3
+
A
IN3
–
V
CM34
A
IN4
+
A
IN4
–
A
IN8
+
A
IN8
–
A
IN1
+
A
IN1
–
O1A
+
O1A
–
DCO
+
DCO
–
FR
+
FR
–
G2
G1
N1
N2
H7
H8
G8
G7
E7
E8
CLK
+
CLK
–
P5 P6
B6C5
1.8V
1.8V
SENSE
V
DD
V
REF
OV
DD
33pF
150pF
180nH180nH
3.3V
180nH
180nH
150pF
150Ω 474Ω
37.4Ω
37.4Ω
–OUT
+OUT
V
OCM
+IN
V
+
–IN
474Ω
75Ω
75Ω
66.5Ω
66.5Ω
0.1µF
0.8pF
0.8pF
68pF
68pF
6409 TA03
• • •
–
+
150Ω
SHDN
GND
INPUT
49.9Ω
LTC6409