LTC5507

4

5507f

BLOCK DIAGRA

–

+

–

+

5507 BD

GAIN

COMPRESSION

SHDN

SHDN

GND

C1

C2

2

1

3

4

BUFFER

250

Ω

RF DET

30k

30k

60

µA60µA

150k

BIAS

100

Ω

6

5

PCAP

C1 = C2

C2 (

µF) ≥

, f = LOWEST RF INPUT FREQUENCY (MHz)

1

30f

PI FU CTIO S

SHDN (Pin 1): Shutdown Input. A logic low or no-connect

on the SHDN pin places the part in shutdown mode. A logic

high enables the part. SHDN has an internal 150k pull

down resistor to ensure that the part is in shutdown when

the enable driver is in a tri-state condition.

GND (Pin 2): System Ground.

Voltage.

be bypassed with 0.1

µF and 100pF ceramic capacitors.

PCAP (Pin 5): Peak Detector Hold Capacitor. Capacitor

value is dependent on RF frequency. Capacitor must be

coupling capacitor must be used to connect to the RF

signal source. This pin has an internal 250

Ω termination

and an internal Schottky diode detector.

Figure 2.