LTC5505-1 查看數據表（PDF） - Linear Technology

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LTC5505-1

RF Power Detector with Buffered Output and >40dB Dynamic Range

Linear Technology 

LTC5505-1/LTC5505-2

PI FU CTIO S

RFIN (Pin 1): RF Input Voltage. Referenced to VCC. An

external coupling capacitor to the RF source is required.

The frequency range is 300MHz to 3GHz. This pin has an

internal 250Ω termination, an internal Schottky diode

detector and peak detector capacitor. (See Note 6 in the

Electrical Characteristics.)

GND (Pin 2): System Ground.

SHDN (Pin 3): 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 the drivers are in

a tri-state condition.

VOUT (Pin 4): Buffered and Level Shifted Detector Output

Voltage.

VCC (Pin 5): Power Supply Voltage, 2.7V to 6V. VCC should

be bypassed appropriately with ceramic capacitors.

BLOCK DIAGRA

RFIN 1

250Ω

VCC

5

GAIN

COMPRESSION

SHDN

GND 2

28pF

60µA

60µA

+

RF DET

–

150k

3

SHDN

130mV

22k

+

BUFFER

–

30k

30k

100Ω

100Ω

BIAS

4 VOUT

5505 BD

5505f

5

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