LTC5531 データシートの表示（PDF） - Linear Technology

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LTC5531

Precision 300MHz to 7GHz RF Detector with Shutdown and Offset Adjustment

Linear Technology 

LTC5531

PI FU CTIO S

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

coupling capacitor must be used to connect to the RF

signal source. The frequency range is 300MHz to 7GHz.

This pin has an internal 500Ω termination, an internal

Schottky diode detector and a peak detector capacitor.

GND (Pin 2): 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 160k pulldown resistor to

ensure that the part is in shutdown when no input is

applied. In shutdown VOUT is connected to ground via a

280Ω resistor.

VOS (Pin 4): VOUT Offset Voltage Adjustment. This pin

adjusts the starting VOUT voltage when no RF signal is

present. For VOS from 0V to 120mV, VOUT is unaffected by

VOS. For VOS > 120mV, VOUT is the sum of VOS plus the

detected RF signal.

VOUT (Pin 5): Detector Output.

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

be bypassed appropriately with ceramic capacitors.

BLOCK DIAGRA

RFSOURCE

1

RFIN

GND 2

VCC

6

BIAS

500Ω

500Ω

SHUTDOWN

SD

+

BUFFER

–

30k

30k

31k

25pF

24k

50µA

50µA

+

RF DET

–

SD

160k

80k

80k

SD

120mV+

3

SHDN

5 VOUT

180Ω

100Ω

4 VOS

5531 BD

5531f

8

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