LT5504

7

5504f

OUTPUT CURRENTS

FROM RF AND IF

DETECTORS

400µA

5504 F04

+

–

TYPICAL APPLICATIO S

APPLICATIO S I FOR ATIO

Figure 5. LT5504 Evaluation Board Circuit Schematic

Figure 6.Component Side Silkscreen of Evaluation Board

5504 F04

1

2

3

4

8

7

6

5

GND

LO

EN

C2

100pF

C3

1nF

C7

100pF

LO

INPUT

R1

82Ω

R3

10k

R2

200Ω

R5

500k

R4

20k

C1

100pF

C4

1nF

RF

INPUT

LT5504

JUMPER

T1

TOKO

617DB-1022

Figure 4. Simplified Circuit Schematic of the Output Interface

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.

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 9. Bottom Side Layout

of Evaluation Board

Figure 7. Component Side

Layout of Evaluation Board

Figure 8.Bottom Side

Silkscreen of Evaluation Board