this document contains information on a new product. specifications and information are subject to change without notice wj communications, inc ? phone 1-800-wj1-4401 ? fax: 408-577-6621 ? e-mail: sales@wj.com ? web site: www.wj.com july 2003 VG101 cellular-band variable gain amplifier product information the communications ed g e tm product features ? 750 ? 1000 mhz bandwidth ? 30 db attenuation range ? +40 dbm output ip3 ? +21 dbm p1db ? constant ip3 & p1db over attenuation range ? single voltage supply ? 6x6 mm 28-pin qfn package ? mttf > 100 years applications ? xmit & rcv agc circuitry for mobile infrastructure product description the VG101 is a cellular-band high dynamic range variable gain amplifier (vga) packaged in a 6x6 mm surface- mount package. the +21 dbm output compression point and +40 dbm output intercept point of the amplifier are maintained over the entire attenuation range, making the VG101 ideal for use in transmitter and receiver agc circuits and as a variable gain stage following an lna in high dynamic range receiver front ends. superior thermal design allows the product to have a minimum mttf rating of 100 years at a mounting temperature of +85o c. all devices are 100% rf & dc tested and packaged on tape and reel for automated surface- mount assembly. functional diagram function pin no gain control 5 no connect 7, 19 rf input 11 interstage match 21 rf output / dc bias 25 ground all other pins backside copper specifications parameter units min typ max conditions frequency range mhz 750 900 1000 see note 1 gain at min. attenuation db 15 16 input return loss db 10 output return loss db 10 output p1db dbm +21 output ip3 dbm +37 +40 see note 2 noise figure at min. attenuation db 3.8 v ctrl = 0 v gain variation range db 30 see note 3 gain variation control voltage, v ctrl v 0 4.5 group delay ns 1 frequency = 800 mhz supply voltage v +5 operating amplifier current range ma 120 150 180 pin 25 gain control pin current range ma 0 25 pin 5 draws no current at maximum gain thermal resistance c / w 59 junction temperature c 160 see note 4 test conditions unless otherwise noted. 1. t = 25oc, vdd = +5 v, frequency = 900 mhz in an application circuit. 2. 3oip measured with two tones at an output power of +10 dbm/tone separated by 10 mhz. the suppression on the largest im3 pr oduct is used to calculate the 3oip using a 2:1 rule. 3. the gain variation range is measured with 15 ma of current on gain control pin 5. 4. the junction temperature ensures a minimum mtbf rating of 1 million hours of usage. absolute maximum rating ordering information parameter rating part no. description operating case temperature -40 to +85 c VG101 cellular-band variable gain amplifier storage temperature -55 to +125 c VG101-pcb fully assembled application board amplifier supply voltage (pin 25) +6 v attenuation control voltage +5.5 v rf input power (continuous) +12 dbm junction temperature +220 c operation of this device above any of these parameters may cause permanent damage. n/c gnd vctrl gnd gnd gnd gnd 8 9 10 11 12 13 14 28 27 26 25 24 23 22 7 6 5 4 3 2 1 15 16 17 18 19 20 21 gnd gnd gnd rf out gnd gnd gnd gnd gnd gnd rf in gnd gnd gnd gnd gnd gnd gnd n/c gnd match variable attenuator amp
this document contains information on a new product. specifications and information are subject to change without notice wj communications, inc ? phone 1-800-wj1-4401 ? fax: 408-577-6621 ? e-mail: sales@wj.com ? web site: www.wj.com july 2003 VG101 cellular-band variable gain amplifier product information the communications ed g e tm application circuit: 750 ? 1000 mhz (VG101-pcb) circuit board material: .014? fr-4, 4 layers, .062? total thickness ? pin 21 needs to be connected to ground through a high impedance transmission line as shown for proper interstage matching. the position of r2 can be varied for optimal performance. ? the amplifier is biased through pin 25 and should be connected directly into a voltage regulator. ? distances are shown from the edge-to-edge for the land pattern. bill of materials ref. des. description size c1, c3 47 pf chip capacitor 0603 c2, c4 0.01 f chip capacitor 0603 l1 82 nh chip inductor 0603 l2 39 nh chip inductor 0603 r1 100 ? chip resistor 0603 q1 mmbt2222 motorola transistor sot-23 u1 VG101 variable gain amplifier qfn 6x6 s-parameters attenuation control voltage = 0 v, 25c 8 10 12 14 16 18 700 800 900 1000 frequency (mhz) s21 (db) -20 -15 -10 -5 0 5 return loss (db) s22 s11 s21 s11, s22, s21 vs gain control voltage frequency = 900 mhz, 25c -30 -20 -10 0 10 20 012345 gain control voltage (v) -30 -20 -10 0 10 normalized gain (db) s22 s11 nor m alized to the m axim u m gai n l evel of 17 db n orm alize d gain flatness 25c -2.0 -1.5 -1.0 -0.5 0.0 0 5 10 15 20 25 normalized attenuation (db) flatness (db) f = 864 - 889 mhz f = 824 - 849 mhz phase shift vs. normalized gain frequency = 900 mhz, 25c -30 -25 -20 -15 -10 -5 0 -30 -25 -20 -15 -10 -5 0 normalized gain (db) normalized phase (deg) output intercept point vs. output power frequency = 900 mhz, 25c 20 25 30 35 40 -5 0 5 10 15 output power (dbm) oip3 (dbm) oip3 / p1db vs. normalized gain frequency = 900 mhz, pout = +10 dbm, 25c 15 20 25 30 35 40 -20 -15 -10 -5 0 normalized gain (db) magnitude (dbm) p1db oip normalized to the maximum g ain level of 17 db
this document contains information on a new product. specifications and information are subject to change without notice wj communications, inc ? phone 1-800-wj1-4401 ? fax: 408-577-6621 ? e-mail: sales@wj.com ? web site: www.wj.com july 2003 VG101 cellular-band variable gain amplifier product information the communications ed g e tm outline drawing mounting configuration / land pattern product marking the component will be lasermarked with a ?VG101? designator with a four-digit alphanumeric lot code on the top surface of the package. tape and reel specifications for this part will be located on the website in the ?application notes? section. esd / msl information esd classification: class 1b value: passes 600 v test: human body model (hbm) standard: jedec standard jesd22-a114 esd classification: class iv value: passes 1000 v test: charged device model (cdm) standard: jedec standard jesd22-c101 msl rating: level 1 at +250 c convection reflow standard: jedec standard j-std-020b functional pin layout pin function pin function 1 gnd 15 gnd 2 gnd 16 gnd 3 gnd 17 gnd 4 gnd 18 gnd 5 gain control pin 19 n/c 6 gnd 20 gnd 7 n/c 21 interstage match 8 gnd 22 gnd 9 gnd 23 gnd 10 gnd 24 gnd 11 rf input 25 rf output / bias 12 gnd 26 gnd 13 gnd 27 gnd 14 gnd 28 gnd
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