_______________________________________________________________ maxim integrated products 1 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxims website at www.maxim-ic.com. rf power detector with shutdown control MAX2209A 19-5493; rev 0; 9/10 ordering information functional diagram/typical operating circuit +denotes a lead(pb)-free/rohs-compliant package. ucsp is a trademark of maxim integrated products, inc. general description the MAX2209A is a wideband (800mhz to 2ghz) rf power detector. it takes an rf signal from the directional coupler at the input, and outputs a dc voltage propor - tional to the rf peak voltage. the change in output voltage versus temperature is very repeatable from part to part and enables a lookup table based on nominal behavior, minimizing the effective detection error to less than q 0.5db relative to room temperature. the MAX2209A comes in a space-saving 2 x 2, 0.5mm pitch ucsp?. applications dual-band wcdma handsets high-speed downlink packet access (hsdpa) high-speed uplink packet access (hsupa) features s -25dbm to -5dbm power detection range s 0.5db detection error due to temperature s +2.7v to +5v single-supply operation s space-saving 4-bump, 1mm 2 ucsp package s shutdown control s 140ns step-response time evaluation kit available rf input adc v cc a1 out a2 v cc b1 gnd b2 rfin/ shdn MAX2209A shdn 2ki part temp range pin- package top mark MAX2209Aebs+ -40 n c to +85 n c 4 ucsp agj
rf power detector with shutdown control MAX2209A 2 ______________________________________________________________________________________ stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. v cc to gnd ............................................................. -0.3v to +6v rfin to gnd ......................................... -0.3v to + (v cc + 0.3v) out to gnd .......................................... -0.3v to + (v cc + 0.3v) rfin input power .......................................................... +10dbm continuous power dissipation (t a = +70 n c) 4-bump wlp (derate 3mw/ n c above +70 n c) ............. 238mw junction-to-ambient thermal resistance ( b ja ) (note 1) .......................................... 335 n c/w operating temperature range .......................... -40 n c to +85 n c storage temperature range ............................ -65 n c to +160 n c junction temperature .................................................... +150 n c bump temperature (soldering, note 2) infrared (15s) ............................................................... +260 n c soldering temperature (reflow) ...................................... +240 n c dc electrical characteristics (v cc = 2.7v to 5.0v, no rf signal applied, t a = -40 n c to +85 n c. typical values are at v cc = 2.8v, t a = +25 n c, unless otherwise noted.) (note 3) absolute maximum ratings note 1: package thermal resistances were obtained using the method described in jedec specification jesd51-7, using a 4-layer board. for detailed information on package thermal considerations, refer to www.maxim-ic.com/ thermal-tutorial . note 2: for detailed information on soldering, refer to application note 1891: wafer-level packaging (wlp) and its applications . caution! esd sensitive device parameter conditions min typ max units supply voltage 2.7 5.0 v supply current 3.9 6 ma idle output voltage 35 mv output current source capability p in = -5dbm, v out forced 100mv lower than open- circuit output voltage 1000 2300 f a output current sink capability p in = -25dbm, v out forced 10mv higher than open- circuit output voltage 75 150 f a shutdown current v shdn = 0v 25 50 f a shdn logic-high v ih , including 2k i resistor 1.2 v shdn logic-low v il , including 2k i resistor 0.45 v turn-on time shdn transitions to v ih , v out is within 90% of final value (note 4) 1.5 2 f s rf step-response time rf transitions from < -25dbm to -5dbm, v out is within 90% of final value, 1k w + 10pf load (note 4) 140 200 ns
rf power detector with shutdown control MAX2209A _______________________________________________________________________________________ 3 typical operating characteristics (v cc = 2.8v. typical values are at t a = +25 n c, unless otherwise noted.) ac electrical characteristics (50 i system, v cc = 2.8v, t a = -40 n c to +85 n c. typical values are at t a = +25 n c, unless otherwise noted.) (note 3) note 3: guaranteed by production test at t a = +25 n c. guaranteed by design and characterization at t a = -40 n c and t a = +85 n c. note 4: guaranteed by design and characterization. see the typical operating characteristics . input power (dbm) out (v) -5 -10 -15 -20 0.1 1 10 0.01 -25 0 output voltage vs. input power (rf = 836mhz) MAX2209A toc01 input power (dbm) out (v) -5 -10 -15 -20 0.1 1 10 0.01 -25 0 output voltage vs. input power (rf = 1950mhz) MAX2209A toc02 output voltage vs. frequency MAX2209A toc03 input frequency (mhz) out (v) 3000 2500 2000 1500 1000 500 0.1 1 0.01 0 3500 p in = -25dbm p in = -10dbm p in = -5dbm input power (dbm) error (db) -5 -10 -15 -20 -1.0 -0.5 0 0.5 1.0 1.5 -1.5 -25 0 error due to temperature (rf = 836mhz, 58 units) MAX2209A toc04 -40c +85c input power (dbm) error (db) -5 -10 -15 -20 -1.0 -0.5 0 0.5 1.0 1.5 -1.5 -25 0 MAX2209A toc05 -40c +85c error due to temperature (rf = 1950mhz, 58 units) sigma of -40c error input power (dbm) sigma (db) 0.02 0.04 0.06 0.08 0.12 0.10 0.14 0.16 0 MAX2209A toc06 -5 -10 -15 -20 -25 0 rf = 1950mhz rf = 836mhz parameter conditions min typ max units rf input frequency 800 2000 mhz rf input return loss 800mhz 16 db 2000mhz 9 output voltage, 836mhz -5dbm input 0.88 v -25dbm input 0.06 output voltage, 1950mhz -5dbm input 0.72 v -25dbm input 0.06 residual error after room temperature calibration (t a = -40 n c to +85 n c) (note 4) -5dbm input q 0.5 db -25dbm input q 1.5
rf power detector with shutdown control MAX2209A 4 ______________________________________________________________________________________ typical operating characteristics (continued) (v cc = 2.8v. typical values are at t a = +25 n c, unless otherwise noted.) residual error after room temperature calibration MAX2209A toc10 input power (dbm) error (db) -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 -0.5 -5 -10 -15 -20 -25 0 rf = 1950mhz, 58 units, -40c residual error after room temperature calibration MAX2209A toc11 input power (dbm) error (db) -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 -0.5 -5 -10 -15 -20 -25 0 rf = 1950mhz, 58 units, +85c time (s) out (v) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 0.8 0.6 0.4 0.2 1.0 0 0 settling time from rf power (on/off rf = 836mhz) MAX2209A toc12 p in = -5dbm p in = -7dbm p in = -10dbm p in = -15dbm sigma of +85c error input power (dbm) sigma (db) -5 -10 -15 -20 0.02 0.04 0.06 0.08 0.10 0.12 0 -25 0 MAX2209A toc07 rf = 1950mhz rf = 836mhz residual error after room temperature calibration MAX2209A toc08 input power (dbm) error (db) -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 -0.5 -5 -10 -15 -20 -25 0 rf = 836mhz, 58 units, -40c residual error after room temperature calibration MAX2209A toc09 input power (dbm) error (db) -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 -0.5 -5 -10 -15 -20 -25 0 rf = 836mhz, 58 units, +85c frequency (mhz) return loss (db) 500 1000 1500 2000 2500 3000 3500 25 20 15 10 5 30 0 0 rf return loss vs. frequency MAX2209A toc13
rf power detector with shutdown control MAX2209A _______________________________________________________________________________________ 5 bump description bump configuration MAX2209A ucsp gn d refin/shdn out v cc b1 b2 a1 a2 + top view bump side down bump name function a1 out detector output a2 v cc power supply. bypass to gnd with a capacitor as close as possible to the bump. b1 gnd ground connection. connect to pcb ground plane with as low inductance as possible. b2 rfin/ shdn rf input and shutdown control. ac-couple the rf input and dc couple the shutdown control through a 2k i resistor to this pin.
rf power detector with shutdown control MAX2209A 6 ______________________________________________________________________________________ detailed description the MAX2209A power detector is designed to oper - ate from 800mhz to 2.0ghz. the device is ideal for wideband code-division multiple access (wcdma), cdma2000 m , and high-speed downlink/uplink packet access. the MAX2209A accepts an rf signal at the input, and outputs a temperature-independent voltage related to the input signal power. the output voltage expressed in dbv is proportional to the input power expressed in dbm. the device has a detection range from -25dbm to 0dbm. applications information the typical application circuit, as taken from the MAX2209A ev kit, is shown in figure 1. the ic can be shut down by forcing the rfin/ shdn dc voltage low through a 2k resistor. the output of the detector goes to an adc for further processing by the baseband sys - tem. connect a series resistor and shunt capacitor to the MAX2209A output to reduce residual amplitude ripple. the series resistor should not be less than 1k i . ev kit gerber files, schematic, bom, and updates are available on the MAX2209A product page at maxims website ( www.maxim-ic.com ). layout there are two areas that require attention: the gnd pin and the supply bypassing. connect the gnd pin to the pcb ground with a gnd via as close as possible, and bypass v cc to ground with a capacitor as close as pos - sible to the part. figure 1. typical application circuit from MAX2209A ev kit cdma2000 is a registered trademark of the telecommunications industry association. package information for the latest package outline information and land patterns, go to www.maxim-ic.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status. chip information process: bipolar rf input adc v cc a1 out a2 v cc b1 gnd b2 rfin/ shdn MAX2209A shdn 2ki 7.5ki 15pf 27pf 47pf test point sma 50i pa directional coupler to antenna package type package code outline no. land pattern no. 4 ucsp b4+4 21-0007
MAX2209A maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circuit patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 7 ? 2010 maxim integrated products maxim is a registered trademark of maxim integrated products, inc. rf power detector with shutdown control revision history revision number revision date description pages changed 0 9/10 initial release
|
