RF power detector intended

www.DataSheet4U.com LMV221 50 MHz to 3.5 GHz 40 dB Logarithmic Power Detector for CDMA and WCDMA December 2006 LMV221 50 MHz to 3.5 GHz 40 dB Logarithmic Power Detector for CDMA and WCDMA General Description The LMV221 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 3.5 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 LMV221 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 LMV221 power detector is offered in the small 2.2 mm x 2.5 mm x 0.8 mm LLP package. Features ■ ■ ■ ■ ■ ■ ■ 40 dB linear in dB power detection range Output voltage range 0.3 to 2V Shutdown Multi-band operation from 50 MHz to 3.5 GHz 0.5 dB accurate temperature compensation External configurable output filter bandwidth 2.2 mm x 2.5 mm x 0.8 mm LLP 6 package Applications ■ ■ ■ ■ UMTS/CDMA/WCDMA RF power control GSM/GPRS RF power control PA modules IEEE 802.11b, g (WLAN) Typical Application (a) LMV221 with output RC Low Pass Filter (b) LMV221 with feedback (R)C Low Pass Filter 20173771 20173704 © 2006 National Semiconductor Corporation 201737 www.national.com www.DataSheet4U.com LMV221 Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage VDD - GND RF Input Input power DC Voltage Enable Input Voltage ESD Tolerance (Note 2) Human Body Model Machine Model Charge Device Model Storage Temperature Range 3.6V 10 dBm 400 mV VSS - 0.4V < V EN < VDD + 0.4V 2000V 200V 2000V −65°C to 150°C Junction Temperature (Note 3) Maximum Lead Temperature (Soldering,10 sec) 150°C 260°C (Note 1) 2.7V to 3.3V −40°C to +85°C 50 MHz to 3.5 GHz −45 dBm to −5 dBm −58 dBV to −18 dBV 86.6°C/W Operating Ratings Supply Voltage Temperature Range RF Frequency Range RF Input Power Range (Note 5) Package Thermal Resistance θJA (Note 3) 2.7 V DC and AC Electrical Characteristics Unless otherwise specified, all limits are guaranteed to; TA = 25°C, VDD = 2.7V, RF input frequency f = 1855 MHz CW (Continuous Wave, unmodulated). Boldface limits apply at the temperature extremes (Note 4). Symbol Supply Interface IDD Supply Current Active mode: EN = High, no Signal present at RFIN. Shutdown: EN = Low, no Signal present at RFIN. EN = Low: PIN = 0 dBm (Note 8) Logic Enable Interface VLOW VHIGH IEN RIN VOUT EN Logic Low Input Level (Shutdown mode) EN Logic High Input Level Current into EN Pin Input Resistance Output Voltage Swing From Positive Rail, Sourcing, VREF = 0V, IOUT = 1 mA From Negative Rail, Sinking, VREF = 2.7V, IOUT = 1 mA IOUT Output Short Circuit Current Sourcing, VREF = 0V, VOUT = 2.6V Sinking, VREF = 2.7V, VOUT = 0.1V BW RTRANS SR Small Signal Bandwidth Output Amp Transimpedance Gain Slew Rate No RF input signal. Measured from REF input current to VOUT No RF Input Signal, from IREF to VOUT, DC Positive, VREF from 2.7V to 0V Negative, VREF from 0V to 2.7V ROUT Output Impedance (Note 8) No RF Input Signal, EN = High. DC measurement 35 3 2.7 3 2.7 3 2.7 3 2.7 40 47.1 16 14 5.4 5.7 450 42.7 4.1 4.2 0.6 5 6 V/µs 55 mA 1.1 1 60 40 50 40 50 0.6 V V μA Ω 6.5 5 7.2 0.5 8.5 10 3 4 10 mA Parameter Condition Min (Note 6) Typ (Note 7) Max (Note 6) Units μA RF Input Interface Output Interface mV kHz kΩ Ω www.national.com 2 www.DataSheet4U.com LMV221 Symbol IOUT,SD Parameter Output Leakage Current in Shutdown mode Maximum Output Voltage PIN= −5 dBm (Note 8) Condition EN = Low, VOUT = 2.0V Min (Note 6) Typ (Note 7) 21 Max (Note 6) 300 500 1.83 1.82 1.68 1.57 1.48 1.36 350 388 20 Units nA RF Detector Transfer VOUT,MAX f = 50 MHz f = 900 MHz f = 1855 MHz f = 2500 MHz f = 3000 MHz f = 3500 MHz VOUT,MIN ΔVOUT,MIN ΔVOUT Minimum Output Voltage (Pedestal) Pedestal Variation over temperature Output Voltage Range PIN from −45 dBm to −5 dBm (Note 8) No input Signal No Input Signal, Relative to 25°C f = 50 MHz f = 900 MHz f = 1855 MHz f = 2500 MHz f = 3000 MHz f = 3500 MHz KSLOPE Logarithmic Slope (Note 8) f = 50 MHz f = 900 MHz f = 1855 MHz f = 2500 MHz f = 3000 MHz f = 3500 MHz PINT Logarithmic Intercept (Note 8) f = 50 MHz f = 900 MHz f = 1855 MHz f = 2500 MHz f = 3000 MHz f = 3500 MHz tON tR tF en vN PSRR Turn-on Time (Note 8) Rise Time (Note 9) Fall Time (Note 9) Output Referred Noise (Note 9) Output referred Noise (Note 8) Power Supply Rejection Ratio (Note 9) No signal at PIN, Low-High transition EN. VOUT to 90% PIN = No signal to 0 dBm, VOUT from 10% to 90% PIN = 0 dBm to no signal, VOUT from 90% to 10% PIN = −10 dBm, at 10 kHz Integrated over frequency band 1 kHz - 6.5 kHz PIN = −10 dBm, f = 1800 MHz 55 1.67 1.67 1.53 1.42 1.33 1.21 175 142 −20 1.37 1.34 1.24 1.14 1.07 0.96 39 36.7 34.4 32.6 31 30 −50.4 −54.1 −53.2 −51.8 −51.1 −49.6 1.44 1.40 1.30 1.20 1.12 1.01 40.5 38.5 35.7 33.8 32.5 31.9 −49.4 −52.8 −51.7 −50 −48.9 −46.8 8 2 2 1.5 100 60 150 1.76 1.75 1.61 1.49 1.40 1.28 250 V mV mV 1.52 1.47 1.37 1.30 1.20 1.09 42 40 37.1 35.2 34 33.5 −48.3 −51.6 −50.2 −48.3 −46.6 −44.1 10 12 12 12 µs µs µs µV/ µVRMS dB dBm mV/dB V 3 www.national.com www.DataSheet4U.com LMV221 Symbol Parameter Condition Min (Note 6) −0.60 −1.10 −0.70 −1.24 −0.40 −1.1 −0.43 −1.0 −0.87 −1.2 −1.73 −2.0 −1.1 −1.0 −1.1 −1.1 −1.2 –1.2 −0.06 −0.056 −0.069 −0.084 −0.092 −0.10 −0.65 −0.75 −0.88 −0.86 −0.85 −0.76 −15 −13.4 −14.1 −13.4 −11.7 −10.5 −12.3 −13.1 −14.7 −15.9 −18 −21.2 −15.8 −14.2 −14.9 −14.5 −13 −12 Typ (Note 7) 0.53 0.46 0.48 0.51 0.56 0.84 0.4 0.38 0.44 0.48 0.5 0.62 Max (Note 6) 0.56 1.3 0.37 1.1 0.24 1.1 0.56 1.1 1.34 1.6 2.72 2.7 1.4 1.27 1.31 1.15 0.98 0.85 0.069 0.056 0.069 0.084 0.092 0.10 0.57 0.58 0.72 0.75 0.77 0.74 Units Power Measurement Performance ELC Log Conformance Error (Note 8) −40 dBm ≤ PIN ≤ −10 dBm f = 50 MHz f = 900 MHz f = 1855 MHz f = 2500 MHz f = 3000 MHz f = 3500 MHz EVOT Variation over Temperature (Note 8) −40 dBm ≤ PIN ≤ −10 dBm f = 50 MHz f = 900 MHz f = 1855 MHz f = 2500 MHz f = 3000 MHz f = 3500 MHz E1 dB Measurement Error for a 1 dB input power step (Note 8) −40 dBm ≤ PIN ≤ −10 dBm f = 50 MHz f = 900 MHz f = 1855 MHz f = 2500 MHz f = 3000 MHz f = 3500 MHz E10 dB Measurement Error for a 10 dB input power step (Note 8) −40 dBm ≤ PIN ≤ −10 dBm f = 50 MHz f = 900 MHz f = 1855 MHz f = 2500 MHz f = 3000 MHz f = 3500 MHz ST Temperature Sensitivity −40°C < TA < 25°C (Note 8) −40 dBm ≤ PIN ≤ −10 dBm f = 50 MHz f = 900 MHz f = 1855 MHz f = 2500 MHz f = 3000 MHz f = 3500 MHz ST Temperature Sensitivity 25°C < TA < 85°C (Note 8) f = 50 MHz f = 900 MHz f = 1855 MHz f = 2500 MHz f = 3000 MHz f = 3500 MHz ST Temperature Sensitivity −40°C < TA < 25°C, (Note 8) PIN = −10 dBm f = 50 MHz f = 900 MHz f = 1855 MHz f = 2500 MHz f = 3000 MHz f = 3500 MHz dB dB dB dB −7 −6 −5.9 −4.1 −1.8 0.5 −6.7 −6.7 −7.1 −7.6 −8.5 −9.5 −8.3 −6 −7.4 −6.6 −4.9 −3.4 1 1.5 2.3 5.2 8 1.2 −1.1 −0.2 0.42 0.63 1 2.5 −0.75 2.2 2 1.3 3.3 5.3 mdB/°C mdB/°C mdB/°C −40 dBm ≤ PIN ≤ −10 dBm www.national.com 4 www.DataSheet4U.com LMV221 Symbol ST Parameter Temperature Sensitivity 25°C < TA < 85°C, (Note 8) PIN = −10 dBm f = 50 MHz f = 900 MHz f = 1855 MHz f = 2500 MHz f = 3000 MHz f = 3500 MHz Condition Min (Note 6) −12.4 −13.7 −14.6 −15.2 −16.5 −18.1 −8.85 −9.3 −8.3 −6 −5.4 −7.2 Typ (Note 7) −8.9 −9.4 −10 −10.8 −12.2 −13.5 −5.9 −6.1 −5.5 −4.2 −3.7 −2.7 −40.3 −44.2 −42.9 −40.4 −38.4 −35.3 Max (Note 6) −5.3 −5 −5.6 −6.5 −7.9 −9 Units mdB/°C PMAX Maximum Input Power for ELC = 1 dB(Note 8) f = 50 MHz f = 900 MHz f = 1855 MHz f = 2500 MHz f = 3000 MHz f = 3500 MHz dBm PMIN Minimum Input Power for ELC = 1 dB (Note 8) f = 50 MHz f = 900 MHz f = 1855 MHz f = 2500 MHz f = 3000 MHz f = 3500 MHz −38.9 −42.9 −41.2 −38.6 −35.8 −31.9 dBm DR Dynamic Range for ELC = 1 dB (Note 8) f = 50 MHz f = 900 MHz f = 1855 MHz f = 2500 MHz f = 3000 MHz f = 3500 MHz 31.5 34.4 34 33.8 32.4 26.2 34.5 38.1 37.4 36.1 34.8 32.7 dB Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics. Note 2: Human body model, applicable std. MIL-STD-883, Method 3015.7. Machine model, applicable std. JESD22–A115–A (ESD MM std of JEDEC). FieldInduced Charge-Device Model, applicable std. JESD22–C101–C. (ESD FICDM std. of JEDEC) Note 3: The maximum power dissipation is a function of TJ(MAX) , θJA. The maximum allowable power dissipation at any ambient temperature is PD = (TJ(MAX) - TA)/θJA. All numbers apply for packages soldered direc