lt5504 Linear Technology Corporation, lt5504 Datasheet - Page 7

• Manufacturer Part Number: lt5504
• Description: 800mhz To 2.7ghz Rf Measuring Receiver
• Manufacturer: Linear Technology Corporation

APPLICATIO S I FOR ATIO
to 400µA/C
µs when C
TYPICAL APPLICATIO S
INPUT
RF
Figure 4. Simplified Circuit Schematic of the Output Interface
Figure 5. LT5504 Evaluation Board Circuit Schematic
100pF
1nF
C4
C1
V
617DB-1022
Figure 7. Component Side
Layout of Evaluation Board
CC
TOKO
L
OUTPUT CURRENTS
L
T1
FROM RF AND IF
. For example, the slew rate is reduced to 4V/
= 100pF.
DETECTORS
82Ω
R1
U
100pF
C2
1
2
3
4
+
–
V
RF
RF
GND
CC
+
–
U
LT5504
1nF
C3
V
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
V
OUT
LO
EN
CC
400µA
U
C
8
7
6
5
C
W
R5
500k
R3
10k
200Ω
JUMPER
R2
V
CC
Figure 8.Bottom Side
Silkscreen of Evaluation Board
100pF
R4
20k
C7
5504 F04
U
V
OUT
5504 F04
V
LO
INPUT
OUT
Applications
The LT5504 can be used as a self-standing signal strength-
measuring receiver (RSSI) for a wide range of input
signals from – 75dBm to +5dBm, for frequencies from
800MHz to 2.7GHz.
The LT5504 can be used as a demodulator for AM and ASK
modulated signals with data rates up to 5MHz. Depending
on specific application needs, the RSSI output can be split
into two branches, providing AC coupled data output, and
DC coupled, RSSI output for signal strength measure-
ments and AGC. Refer to Figure 5.
The LT5504 can also be used as a wide range RF power
detector for transmit power control.
Figure 6.Component Side Silkscreen of Evaluation Board
Figure 9. Bottom Side Layout
of Evaluation Board
LT5504
7
5504f