HMC714LP5E datasheet(21/40 Pages) HITTITE

21 / 40 page

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Pin Descriptions (Continued)

HMC714LP5 / 714LP5E

v05.0309

DUAL RMS POWER DETECTOR

0.1 - 3.9 GHz

Pin Number

Function

Description

Interface Schematic

FBKB

Feedback through 3.5K Ohms to the negative

terminal of the integrated Op Amp driving OUTN

OUTN

Output providing the difference of RMS outputs

using an Op Amp. For normal operation,

connected to FBKB to provide the function:

OUTN = RMSB - RMSA + VLVL

OUTP

Output providing the difference of RMS outputs

using an Op Amp. For normal operation,

connected to FBKA to provide the function:

OUTP = RMSA - RMSB + VLVL

FBKA

Feedback through 3.5K Ohms to the negative

terminal of the integrated Op Amp driving OUTP

VTGT

This voltage input changes the logarithmic

intercept point. Use of lower target voltage

reduces error for complex signals with large crest

factors. Normally connected to VREF3 via resistor

voltage divider. See Application Note section.

VREF3

3V Reference voltage output for use with VTGT.

See Application Note section.

TEMP

Temperature sensor output. See Application Note

section.

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