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User's Guide
SNWA005B–December 2007–Revised April 2013
AN-1761 Evaluation Board for the
LMH2100 Logarithmic Power Detector
1 General Description
This evaluation board, Figure 1, is designed to aid in the characterization of the Texas Instruments
LMH2100 Logarithmic Power Detector. This board simplifies the measurement of the DC output voltage
that the LMH2100 produces in response to the power level of the RF signal applied to the RF input. Use
the evaluation board as a guide for high frequency layout and as a tool to aid in device testing and
characterization.
Figure 1. LMH2100 Evaluation Board
2 Basic Operation
The LMH2100 is a 40 dB RF Logarithmic power detector intended for use in CDMA and WCDMA
applications. The device has an RF frequency range from 50 MHz to 4 GHz. It provides an accurate
temperature and supply compensated output voltage that relates linearly to the RF input power in dBm.
The circuit operates with a single supply form 2.7V to 3.3V and has an RF power detection range from
−45 dBm to −5 dBm. The board consist of a single LMH2100 along with external components soldered on
a printed circuit board. Figure 2 shows the schematic of the LMH2100 evaluation board.
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SNWA005B–December 2007–Revised April 2013 AN-1761 Evaluation Board for the LMH2100 Logarithmic Power Detector
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Verzeichnis
- ・ Blockdiagramm on Seite 2
- ・ Beschreibung der Funktionen on Seite 1
- ・ Anwendungsbereich on Seite 7
