LTC5509

5

5509f

BLOCK DIAGRA

PI FU CTIO S

SHDN (Pin 1): Shutdown Input. A logic low 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 no input is

applied.

GND (Pin 2, 5): Ground.

be bypassed appropriately with ceramic capacitors.

coupling capacitor must be used to connect to the RF

signal source. The frequency range is 300MHz to 3GHz.

This pin has an internal 250

Ω termination, an internal

Schottky diode detector and a peak detector capacitor.

–

+

–

+

5509 BD

28pF

SHDN

GND

GND

33pF TO 200pF

(DEPENDING ON

APPLICATION)

2

5

1

3

4

BUFFER

250

Ω

RF DET

30k

30k

60

µA60µA

150k

40k

130mV

BIAS

100

Ω

100

Ω

6

27k

27k