2MHz to 1.6GHz 45dB RF-Detecting

Controllers and RF Detector

10

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10

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OUTPUT-

ENABLED

DELAY

DET

DET

DET

DET

10dB

REFERENCE

CURRENT

OFFSET

COMP

SHDN

OUT

*INVERTING VOLTAGE TO CURRENT CONVERTER

CLPF

SET

RFIN

GND

DET

10dB

10dB

10dB

X1

V-I*

OUTPUT-

ENABLED

DELAY

DET

DET

DET

DET

10dB

REFERENCE

CURRENT

OFFSET

COMP

SHDN

OUT

CLPF

RFIN

GND

DET

10dB

10dB

10dB

X1

V-I*

MAX9933

MAX9930

MAX9931

MAX9932

Figure 1. Functional Diagram

Pin Description

PIN

MAX9930/

MAX9931/

MAX9932

MAX9933

NAME

FUNCTION

1

1

RFIN

RF Input

22

SHDN

3

—

SET

Set-Point Input

4

4

CLPF

Lowpass Filter Connection. Connect external capacitor between CLPF and GND to set

control-loop bandwidth.

5

3, 5

GND

Ground

6

6

N.C.

No Connection. Not internally connected.

7

7

OUT

PA Gain-Control Output

88

Supply Voltage. Bypass to GND with a 0.1µF capacitor.