50MHz to 1000MHz, 75dB Logarithmic

Detector/Controller

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7

Pin Description

PIN

NAME

DESCRIPTION

1, 4

Supply Voltage. Bypass with capacitors as specified in the typical application circuits. Place capacitors

as close to the pin as possible (see the Power-Supply Connections section).

2, 3

INHI, INLO

Differential RF Inputs

5

PWDN

Power-Down Input. Drive PWDN with a logic-high to power down the IC. PWDN must be connected to

Ω.

6

GND

Ground. Connect to the printed circuit (PC) board ground plane.

7

SET

Set-Point Input. To operate in detector mode, connect SET to OUT. To operate in controller mode,

connect a precision voltage source to control the power level of a power amplifier.

8

OUT

Detector Output. In detector mode, this output provides a voltage proportional to the log of the input

power. In controller mode, this output is connected to a power-control input on a power amplifier (PA).

—

EP

Exposed Paddle. Connect EP to GND using multiple vias, or the EP can also be left unconnected.

OUTPUT VOLTAGE vs. FREQUENCY

FREQUENCY INPUT (MHz)

0

200

400

600

800

1000

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

RF PULSE RESPONSE

TIME (50ns/div)

-1.0

-0.5

0

0.5

1.0

1.5

2.0

2.5

RFIN

(AC-COUPLED)

S11 MAGNITUDE

FREQUENCY (MHz)

0

200

400

600

800

1000

-25.0

-22.5

-20.0

-17.5

-15.0

-12.5

-10.0

S11 MAGNITUDE

FREQUENCY (MHz)

0

200

400

600

800

1000

-25.0

-22.5

-20.0

-17.5

-15.0

-12.5

-10.0

°C

°C

°C

°C

Typical Operating Characteristics (continued)