50MHz to 1000MHz, 75dB Logarithmic

Detector/Controller

8

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 Pad (TDFN Package Only). 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)

(

TA = +25°C, unless otherwise noted.)