LMH2100 - 50 MHz to 4 GHz 40 dB Logarithmic Power Detector for CDMA and WCDMA
Datasheet Packaging Samples & Pricing Eval. Boards Reliability Knowledge Base

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

General Description

The LMH2100 is a 40 dB RF power detector intended for use in CDMA and WCDMA applications. More...


Applications

•UMTS/CDMA/WCDMA RF power control
•GSM/GPRS RF power control
•PA modules
•IEEE 802.11b, g (WLAN)
  Typical Application
click for larger image

single application with output filter

ParametersValues
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


Typical Performance

*click for larger image

Vout and Log Conformance vs. RF Input Power @ 1855 MHz
  Block Diagram
click for larger image

block diagram

Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LMH2100 50 MHz to 4 GHz 40 dB Logarithmic Power Detector for CDMA and WCDMA 1976
Kbytes		 21-Mar-08 Download
LMH2100 50 MHz to 4 GHz 40 dB Logarithmic Power Detector for CDMA and WCDMA (Japanese)
 2392 Kbytes   Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.


Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LMH2100EVALEvaluation Board for the LMH2100 Logarithmic Power DetectorFull productionN/A
 
Buy Now 		1+$99.001-
N/AN/A
LMH2100TMMICRO SMD6NOPB1260RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$1.10reel
of
250		XV
I J
16 weeks1000
LMH2100TMXMICRO SMD6NOPB1260RoHS N/A Full productionN/A
 
Buy Now 		1K+$1.10reel
of
3000		XV
I J
16 weeks750000

General 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.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LMH2100TMBICMOS8B+01152007439005211083656
LMH2100TMXBICMOS8B+01152007439005211083656

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.


Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1761: Application Note 1761 Evaluation Board for the LMH2100 Logarithmic Power Detector 309
Kbytes		 14-Dec-07 Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 7-Nov-2009]