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

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

Parameters Values RF Frequency (MHz) 50-4000 Dynamic Range 40 dB Detector Power Range -45 dBm to -5 dBm Accuracy 0.5 dB Inputs/Outputs 1/1 Transfer Linear in dB Modulation Independent No Supply Min 2.7 Volt Supply Max 3.3 Volt Supply Current 7.1 mA Shut down Yes Detector Internal PLL Type Single Temperature Min -40 deg C Temperature Max 85 deg C

Datasheets

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

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

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LMH2100TM/NOPB RoHS Status	MICRO SMD	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 1408 FARNELL Europe and Asia 55 MOUSER Worldwide 475	$1.10 each at 1K+ pcs	reel of 250
LMH2100TMX/NOPB RoHS Status	MICRO SMD	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 3000 DIGI-KEY Worldwide 0	$1.10 each at 1K+ pcs	reel of 3000

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LMH2100.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LMH2100 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LMH2100EVAL/NOPB	Evaluation Board for the LMH2100 Logarithmic Power Detector	Full production Lead Free (RoHS)	Distributor Region Qty DIGI-KEY Worldwide 0 MOUSER Worldwide 1	$99.00 each	1
Description This evaluation board is designed to aid in the characterization of National Semiconductors 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. Contents: LMH2100 Logarithmic Power Detector Evaluation Board LMH2100 Datasheet Application Note 1761 Evaluation Board for the LMH2100 Logarithmic Power Detector

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LMH2100TM/NOPB	1.385	MICRO SMD	6	1	260	Detail	N/A	N/A	XV I J
LMH2100TMX/NOPB	1.385	MICRO SMD	6	1	260	Detail	N/A	N/A	XV I J

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LMH2100.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LMH2100 is located at RoHS Status.

CAD Symbols and Models N/A

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LMH2100TM	BICMOS8B+	0	3632	0	0	2762292	2	783807897
LMH2100TMX	BICMOS8B+	0	3632	0	0	2762292	2	783807897

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.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LMH2100.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LMH2100 is located at RoHS Status.