lt5502 Linear Technology Corporation, lt5502 Datasheet - Page 8

• Manufacturer Part Number: lt5502
• Description: 400mhz Quadrature If Demodulator With Rssi
• Manufacturer: Linear Technology Corporation

LT5502
I
8
TYPICAL APPLICATIO S
OUT
IF
IN
J2
J1
49.9
MINI-CIRCUIT
R7
1 = EN
2 = STBY
JTX-4-10T
1
SW1
1:4
T1
C13
1 F
6
V
240
6
CC2
R3
5.11k
R10
LT1809CS
4
U2
C23
1 F
7
1.8pF
22nF
C12
C5
51.1k
+
–
R8
3
2
R1
20k
2.55k
51.1k
R6
Figure 3. Evaluation Circuit Schematic With I/Q Output Buffers
C10
1 F
R9
20k
U
R2
C11
1 F
I
OUT
+
I
OUT
10
11
12
–
1
2
3
4
5
6
7
8
9
I
I
GND
V
GND
IF
IF
GND
GND
EN
STBY
IFt
IF INTERSTAGE
OPTIONAL CIRCUIT
OUT
OUT
CC
+
–
+
+
–
C9
1 F
C1
1 F
LT5502
V
V
C24
10 F
C8
R17
CC2
CC1
U1
L1
2
C25
10 F
2XLO
2XLO
Q
Q
22nF
C19
C2
1nF
RSSI
OUT
OUT
GND
GND
GND
V
V
V
IFt
CC
CC
CC
+
–
+
–
–
24
23
22
21
20
19
18
17
16
15
14
13
5502 F02
C20
1 F
Q
OUT
+
Q
OUT
C15
1 F
1nF
C3
–
51.1k
C4
1nF
R14
C14
1 F
2.55k
R12
C18
1 F
3
2
R15
51.1k
+
–
1.8pF
LT1809CS
C16
U3
7
C7
1.8pF
RSSI
4
5.11k
R13
R4
240
6
MINI-CIRCUIT
JTX-4-10T
6
C17
1 F
T2
4:1
R16
49.9
1
J4
J3
2XLO
Q
OUT