Features • 40 dB linear in dB power detection range • Output voltage range 0.3 to 2V • Shutdown • Multi-band operation from 50 MHz to 4 GHz • 0.5 dB accurate temperature compensation • External configurable output filter bandwidth • 0.4 mm-pitch micro SMD package Description The LMH2100 is a 40 dB RF 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 from 2.7V to 3.3V. The LMH2100 has an RF power detection range from −45 dBm to −5 dBm and is ideally suited for direct use in combination with a 30 dB directional coupler. Additional low-pass filtering of the output signal can be realized by means of an external resistor and capacitor. Figure (a) shows a detector with an additional output low pass filter. The filter frequency is set with RS and CS. Figure (b) shows a detector with an additional feedback low pass filter. Resistor RP is optional and will lower the Trans impedance gain (RTRANS). The filter frequency is set with CP//CTRANS and RP//RTRANS. The device is active for Enable = High, otherwise it is in a low power consumption shutdown mode. To save power and prevent discharge of an external filter capacitance, the output (OUT) is high-impedance during shutdown. The LMH2100 power detector is offered in the small 0.4 mm pitch micro SMD package. Applications • UMTS/CDMA/WCDMA RF power control • GSM/GPRS RF power control • PA modules • IEEE 802.11b, g (WLAN)

single application with output filter MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application click for larger image single application with output filter	Block Diagram click for larger image block diagram
Typical Performance *click for larger image Vout and Log Conformance vs. RF Input Power @ 1855 MHz

Datasheet

Title		Size	Date	Other Language
	LMH2100 50 MHz to 4 GHz 40 dB Logarithmic Power Detector for CDMA and WCDMA	1976 Kbytes	21-Mar-08	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-1761: Application Note 1761 Evaluation Board for the LMH2100 Logarithmic Power Detector	309 Kbytes	14-Dec-07

More Application Notes

Title		Size	Date	Other Language
	AN-1681: Application Note 1681 Design Migration from the LM1881 to the LMH1980	143 Kbytes	2-Aug-07	日本語
	AN-1599: Application Note 1599 LMH1981 Evaluation Board Instruction Manual	503 Kbytes	11-Feb-09	日本語
	AN-1618: Application Note 1618 LMH1980 Evaluation Board Instruction Manual	674 Kbytes	19-Jul-07	日本語

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LMH2100TM	BICMOS8B+	0	1152	0	0	743900	5	211083656
LMH2100TMX	BICMOS8B+	0	1152	0	0	743900	5	211083656

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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