features ! attenuation: 0.5 db steps to 31.5 db ! 6 bit digital gain control ! cmos logic ! serial logic interface ! single positive voltage supply ! 8 mm pbga package ! jedec mo-151 footprint ! single package solution for gsm,cdma,pcs description the m/a-com am55-0024 is a dual channel if amplifier and digital attenuator packaged in a multi-layer multi-chip module (mcm). gain control is via two separate serial logic interfaces. the part utilizes plastic ball grid array (pbga) interconnect technology to achieve high circuit density and superior performance. this device is ideal for gsm/dcs/pcs digital base station applications where high dynamic range gain control functionality is required. hi dyn range 2 channel if amp with power control, 100 - 400 mhz am55-0024 functional block diagram parameter absolute maximum input power 2 +20 dbm operating voltage 2 v dd = +6 v operating temperature -40c to +85c storage temperature -65c to +150c absolute maximum ratings 1 1. exceeding any one or combination of these limits may cause permanent damage. 2. ambient temperature (t a ) = +25 c. logic interface if in b if in a if out b if out a electrical specifications: t a = 25c, z 0 = 50 ? 1 parameter test conditions units min. typ. max. gain 100 - 400 mhz db 19.5 21 22.5 gain control range 100 - 400 mhz db 31.5 minimum gain control step size 100 - 400 mhz db 0.5 return loss 100 - 400 mhz db 10 12 output ip 3 100 - 400 mhz @ 5v dbm 30 supply voltage v 3/5 supply current @ 3v / @ 5v ma 300/400 switching speed (50% ttl to 90% rf) ns 50 isolation dbc 50 60 p1 db dbm 15 17.5 noise figure 100 - 400 mhz db 4 1. all measurements in a 50 ohm system. v 2.00
hi dyn range 2 channel if amp w/pwr cntrl, 100 - 400 mhz am55-0024 specifications subject to change without notice. ! north america: tel. (800) 366-2266 ! asia/pacific: tel.+81-44-844-8296, fax +81-44-844-8298 ! europe: tel. +44 (1344) 869 595, fax+44 (1344) 300 020 visit www.macom.com for additional data sheets and product information. v 2.00 external components 1, 2, 3 2 typical performance curves output v swr input v swr component value l 470 nh c 10000 pf 1. all inductors are 470 nh 2. all capacitors are 10000 pf 3. if outputs must be supplied +3 volts. clock diagram 1, 2, 3, 4, 5 1. max clock speed = 40 mhz 2. ton = toff 3. tsu = >3ns 4. thold = >7ns 5. data clocked in on rising clock edge data clock each channel in the am55-0024 is independently controllable with a 3 wire serial interface: clock, data, and latch enable. these lines can be shared based on application requirements. the attenuator within the device is controlled with a 6 bit word, enabling the selection of 64 possible states. the highest gain state is '000000', and the lowest is '111111'. the sequence for shifting the data is as follows: present data (msb first), strobe clock, repeat until 6 bits have been presented and clocked, then strobe the latch enable line, which implements the state change. serial interface 1.0 1.5 2.0 2.5 3.0 3.5 0.045 0.105 0.165 0.225 0.285 0.345 0.405 frequency (ghz) vswr (db) 1.0 1.5 2.0 2.5 3.0 3.5 0.045 0.105 0.165 0.225 0.285 0.345 0.405 frequency (ghz) vswr (db) am55-0024 3v a1 3v a2 3v b1 3v b2 clk a data a latch a digital v dd clk b data b latch b if in a if in b if out a 3v a3 if out b 3v b3 latch
hi dyn range 2 channel if amp w/pwr cntrl, 100 - 400 mhz am55-0024 specifications subject to change without notice. ! north america: tel. (800) 366-2266 ! asia/pacific: tel.+81-44-844-8296, fax +81-44-844-8298 ! europe: tel. +44 (1344) 869 595, fax+44 (1344) 300 020 visit www.macom.com for additional data sheets and product information. v 2.00 typical performance curves (contd) gain attenuation (6 individual bits) 3 noise figure 0 5 10 15 20 25 0.05 0.11 0.17 0.23 0.29 0.35 0.41 frequency (ghz) attenuation (db ) 0 2 4 6 8 10 12 14 16 18 0.05 0.1175 0.185 0.2525 0.32 0.3875 0.455 frequency (ghz) noise figure (db) 18 19 20 21 22 23 0.045 0.105 0.165 0.225 0.285 0.345 0.405 frequency (ghz) gain (db) +85c +25c -40c
hi dyn range 2 channel if amp w/pwr cntrl, 100 - 400 mhz am55-0024 specifications subject to change without notice. ! north america: tel. (800) 366-2266 ! asia/pacific: tel.+81-44-844-8296, fax +81-44-844-8298 ! europe: tel. +44 (1344) 869 595, fax+44 (1344) 300 020 visit www.macom.com for additional data sheets and product information. v 2.00 ordering information 1. if specific reel size is required, consult factory for part number assignment. part number package am55-0024 8-mm pbga package am55-0024tr forward tape and reel 1 AM55-0024RTR reverse tape and reel 4 8 mm pbga 8 7 6 5 4 3 2 1 +5v_a1 dat_a clk_a +5v_a2 rf_out_a a b rf_in_a c le_a d rf_in_b e le_b f clk_b g dat_b +5v_b1 +5v_b2 rf_out_b h pin out
|
