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june 2011 ? 2010 fairchild semiconductor corporation www.fairchildsemi.com fan4852 ? rev. 4.0.0 fan4852 ? 9mhz low-power dual cmos amplifier fan4852 9mhz low-power dual cmos amplifier features ? 0.8ma supply current ? 9 mhz bandwidth ? output swing to within 10mv of either rail ? input voltage range exceeds the rails ? 6v/s slew rate ? 11nv/ ? hz input voltage noise ? fully specified at +3.3v and +5v supplies applications ? piezoelectric sensors ? pcmcia, usb ? mobile communications / battery-powered devices ? notebooks and pdas ? active filters ? signal conditioning ? portable test instruments description the fan4852 is a dual, rail-to-rail output, low-power, cmos amplifier that cons umes only 800a of supply current, while providing 50ma of output short-circuit current. this amplifier is designed to operate supplies from 2.5v to 5v. additionally, the fan4852 is emi hardened, which minimizes emi interference. it has a maximum input offset voltage of 1mv and an input common-mode range that includes ground. the fan4852 is designed on a cmos process and provides 9mhz of bandwidth and 6v/ s of slew rate. the combination of low-power, low-voltage operation and a small package make this amplifier well suited for general-purpose and battery-powered applications. ordering information part number operating temperature range package packing method FAN4852IMU8X -40 to +85c 8-lead msop package 3000 on tape and reel
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fan4852 ? rev. 4.0.0 2 fan4852 ? 9mhz low-power dual cmos amplifier pin configuration figure 1. pin assignments pin definitions pin # name description 1 out1 output, channel 1 2 -in1 negative input, channel 1 3 +in1 positive input, channel 1 4 -vs negative supply 5 +in2 positive input, channel 2 6 -in2 negative input, channel 2 7 out2 output, channel 2 8 +vs positive supply
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fan4852 ? rev. 4.0.0 3 fan4852 ? 9mhz low-power dual cmos amplifier absolute maximum ratings stresses exceeding the absolute maximum ratings may dam age the device. the device may not function or be operable above the recommended operating conditions and st ressing the parts to these levels is not recommended. in addition, extended exposure to stresses above the recomm ended operating conditions may affect device reliability. the absolute maximum ratings are stress ratings only. functi onal operation under any of these conditions is not implied. performance and reliabili ty are guaranteed only if operating conditions are not exceeded. symbol parameter min. max. unit v cc supply voltage 0 6 v v in input voltage range -v s -0.5 +v s +0.5 v t j junction temperature +150 c t stg storage temperature -65 +150 c t l lead soldering, 10 seconds +260 c ? ja thermal resistance (1) 206 c/w note: 1. package thermal resistance jedec standar d, multi-layer test boards, still air. esd information symbol parameter min. typ. max. unit esd human body model, jesd22-a114 8 kv charged device model, jesd22-c101 2 recommended operating conditions the recommended operating conditions table defines th e conditions for actual device operation. recommended operating conditions are specified to en sure optimal performance to the datash eet specifications. fairchild does not recommend exceeding them or designing to absolute maximum ratings. symbol parameter min. typ. max. unit t a operating temperature range -40 +85 c vs supply voltage range 2.5 3.3 5.0 v
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fan4852 ? rev. 4.0.0 4 fan4852 ? 9mhz low-power dual cmos amplifier electrical specifications at +3.3v +v s =+3.3v, -vs = 0v, v cm = +v s /2, and r l = 10k ? to +v s /2, unless otherwise noted. symbol parameter condition min. typ. max. unit i s supply current (2) t a =25 ? c 0.8 1.0 ma full temperature range 1.1 i sc short-circuit output current (2) sourcing v o =v cm , v in =100mv, t a =25 ? c 25 50 ma sourcing v o =v cm , v in =100mv, full temperature range 20 sinking v o =v cm , v in =-100mv, t a =25 ? c 28 46 sinking v o =v cm , v in =-100mv, full temperature range 20 emirr emi rejection ratio, +in and -in (4) v rfpeak =100mvp, (-20dbvp) f=400mhz 75 db v rfpeak =100mvp, (-20dbvp) f=900mhz 78 v rfpeak =100mvp, (-20dbvp) f=1800mhz 87 psrr power supply rejection ratio (2) 2.7v v+ 3.3v, v o =1v, t a =25 ? c 75 95 db 2.7v v+ 3.3v, v o =1v, full temperature range 74 cmrr common mode rejection ratio (2) -0.2v ? 2010 fairchild semiconductor corporation www.fairchildsemi.com fan4852 ? rev. 4.0.0 5 fan4852 ? 9mhz low-power dual cmos amplifier electrical specifications at +3.3v +v s =+3.3v, -vs = 0v, v cm = +v s /2, and r l = 10k ? to +v s /2, unless otherwise noted. symbol parameter condition min. typ. max. unit v o output voltage swing high (2) v o = (+v s ) - v out r l =2k ? to v+/2, t a =25 ? c 21 35 mv r l =2k ? to v+/2, full temperature range 43 r l =10k ? to v+/2, t a =25 ? c 4 10 r l =10k ? to v+/2, full temperature range 12 output voltage swing low (2) v o = v out + (-v s ) r l =2k ? to v+/2, t a =25 ? c 20 32 mv r l =2k ? to v+/2, full temperature range 43 r l =10k ? to v+/2, t a =25 ? c 3 11 r l =10k ? to v+/2, full temperature range 14 gbw gain bandwidth product 9 mhz a vol large signal voltage gain (3) r l =2k ? , v o =0.15 to 1.65v, v o =3.15 to 1.65v, t a =25 ? c 100 114 db r l =2k ? , v o =0.15 to 1.65v, v o =3.15 to 1.65v, full temperature range 97 r l =10k ? , v o =0.1 to 1.65v, v o =3.2 to 1.65v, t a =25 ? c 100 115 r l =10k ? , v o =0.1 to 1.65v, v o =3.2 to 1.65v, full temperature range 97 r out closed-loop impedance f=6mhz 6 ? r in input resistance 10 g ? c in input capacitance common mode 11 pf differential mode 6 m phase margin 86 ? sr slew rate av=+1, v o =1v pp 10%-90% 6.1 v/s thd+n total harmonic distortion + noise f=1khz, av=1, bw=>500khz 0.006 % notes: 2. 100% tested at t a =25c. 3. guaranteed by characterization. 4. emi rejection ratio is defined as emirr ? 20log (v rfpeak / v os ).
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fan4852 ? rev. 4.0.0 6 fan4852 ? 9mhz low-power dual cmos amplifier electrical specifi cations at +5v +v s =+5v, -v s = 0v, v cm = +v s /2, and r l = 10k ? to +v s /2, unless otherwise noted. symbol parameter condition min. typ. max. unit i s supply current (5) t a =25 ? c 0.9 1.1 ma full temperature range 1.2 i sc short-circuit output current (5) sourcing v o =v cm , v in =100mv, t a =25 ? c 60 90 ma sourcing v o =v cm , v in =100mv, full temperature range 48 sinking v o =v cm , v in =-100mv, t a =25 ? c 58 90 sinking v o =v cm , v in =-100mv, full temperature range 44 emirr emi rejection ratio, +in and -in (7) v rfpeak =100mvp, (-20dbvp) f=400mhz 75 db v rfpeak =100mvp, (-20dbvp) f=900mhz 78 v rfpeak =100mvp, (-20dbvp) f=1800mhz 87 psrr power supply rejection ratio (5) 2.7v v+ 5.5v, vo=1v, t a =25 ? c 75 105 db 2.7v v+ 5.5v, vo=1v, full temperature range 74 cmrr common mode rejection ratio (5) -0.2v v cm v+-1.2v 77 122 db cmir input common mode voltage range (5) cmrr 77db -0.2 3.8 v v os input offset voltage (5) t a =25 ? c 0.3 1.0 mv full temperature range 1.2 dv io average drift (6) 0.4 2.0 v/c i os input offset current 1 pa t a = i bn_char input bias current (6) t a =25 ? c 0.1 10.0 pa full temperature range 500 e n input-referred voltage noise f=1khz 11 nv/ ? hz f=10khz 10 nv/ ? hz i n input-referred current noise f=1khz 0.005 pa/ ? hz continued on the following page?
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fan4852 ? rev. 4.0.0 7 fan4852 ? 9mhz low-power dual cmos amplifier electrical specifi cations at +5v +v s =+5v, -v s = 0v, v cm = +v s /2, and r l = 10k ? to +v s /2, unless otherwise noted. symbol parameter condition min. typ. max. unit v o output voltage swing high (5) r l =2k ? to v+/2, t a =25 ? c 25 39 mv r l =2k ? to v+/2, full temperature range 47 r l =10k ? to v+/2, t a =25 ? c 4 11 r l =10k ? to v+/2, full temperature range 13 output voltage swing low (5) r l =2k ? to v+/2, t a =25 ? c 24 38 mv r l =2k ? to v+/2, full temperature range 50 r l =10k ? to v+/2, t a =25 ? c 3 15 r l =10k ? to v+/2, full temperature range 1 gbw gain bandwidth product 9 mhz a vol large signal voltage gain (6) r l =2k ? , v o =0.15 to 2.5v, v o =4.85 to 2.5v, t a =25 ? c 105 118 db r l =2k ? , v o =0.15 to 2.5v, v o =4.85 to 2.5v, full temperature range 102 r l =10k ? , v o =0.1 to 2.5v, v o =4.9 to 2.5v, t a =25 ? c 105 120 r l =10k ? , v o =0.1 to 2.5v, v o =4.9 to 2.5v, full temperature range 102 r out closed-loop impedance f=6mhz 6 ? r in input resistance 10 g ? c in input capacitance common mode 11 pf differential mode 6 m phase margin 94 ? sr slew rate av=+1, v o =1v pp 10%-90% 6.2 v/s thd+n total harmonic distortion + noise f=1khz, av=1, bw=>500khz 0.006 % notes: 5. 100% tested at t a =25c. 6. guaranteed by characterization. 7. emi rejection ratio is defined as emirr ? 20log (v rfpeak / v os ).
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fan4852 ? rev. 4.0.0 8 fan4852 ? 9mhz low-power dual cmos amplifier typical performance characteristics +v s =+3.3v, -v s = 0v, v cm = +v s /2, and r l = 10k ? to +v s /2, unless otherwise noted. figure 2. supply current vs. supply voltage figure 3. sink current vs. supply voltage figure 4. source current vs. supply voltage figure 5. input bias current vs. v cm (3.3v) figure 6. input bias current vs. v cm (5.0v)
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fan4852 ? rev. 4.0.0 9 fan4852 ? 9mhz low-power dual cmos amplifier typical performance characteristics +v s =+3.3v, -v s = 0v, v cm = +v s /2, and r l = 10k ? to +v s /2, unless otherwise noted. figure 7. output swing high vs. supply voltage figure 8. output swing low vs. supply voltage figure 9. output swing high vs. supply voltage figure 10. output swing low vs. supply voltage figure 11. output voltage swing vs. load current at 5.0v figure 12. output voltage swing vs. load current at 3.3v
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fan4852 ? rev. 4.0.0 10 fan4852 ? 9mhz low-power dual cmos amplifier typical performance characteristics +v s =+3.3v, -v s = 0v, v cm = +v s /2, and r l = 10k ? to +v s /2, unless otherwise noted. figure 13. open-loop gain/phase vs. temperature figure 14. open-loop gain/phase vs. load figure 15. phase margin vs. capacitive load figure 16. psrr vs. frequency figure 17. cmrr vs. frequency figure 18. emirr vs. power at 400mhz
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fan4852 ? rev. 4.0.0 11 fan4852 ? 9mhz low-power dual cmos amplifier typical performance characteristics +v s =+3.3v, -v s = 0v, v cm = +v s /2, and r l = 10k ? to +v s /2, unless otherwise noted. figure 19. emirr vs. power at 900mhz figure 20. emirr vs. power at 1800mhz figure 21. emirr vs. frequency at 5.0v figure 22. thd+n vs. frequency figure 23. large signal step response f igure 24. small signal step response
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fan4852 ? rev. 4.0.0 12 fan4852 ? 9mhz low-power dual cmos amplifier typical performance characteristics +v s =+3.3v, -v s = 0v, v cm = +v s /2, and r l = 10k ? to +v s /2, unless otherwise noted. figure 25. small signal step response figure 26. slew rate vs. supply voltage figure 27. v os vs. supply voltage figure 28. v os vs. temperature
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fan4852 ? rev. 4.0.0 13 fan4852 ? 9mhz low-power dual cmos amplifier application information general description the fan4852 amplifier includes single-supply, general- purpose amplifiers, fabricat ed on a cmos process. the input and output are rail-to-rail and the part is unity gain stable. the typical non-inve rting circuit schematic is shown in figure 29. figure 29. typical non-inverting configuration input common mode voltage the common mode input range includes ground. cmrr does not degrade when input le vels are kept 1.2v below the rail. for the best cmrr when using a v s of 5v, the maximum input voltage should 3.8v. figure 30. circuit for input current protection power dissipation the maximum internal power dissipation allowed is directly related to the maximum junction temperature. if the maximum junction temperature exceeds 150c, performance degradation occurs. if the maximum junction temperature exceeds 150c for an extended time, device failure may occur. overdrive recovery overdrive of an amplifier occu rs when the output and/or input ranges are exceeded. the recovery time varies based on whether the input or output is overdriven and by how much the range is exceeded. the fan4852 typically recovers in less than 500ns from an overdrive condition. figure 31 shows the fan4852 amplifier in an overdriven condition. figure 31. overdrive recovery driving capacitive loads figure 31 illustrates the response of the amplifier. a small series resistance (r s ) at the output, illustrated in figure 32, improves stabilit y and settling performance. r s values provided achieve maximum bandwidth with less than 2db of peaking. for maximum flatness, use a larger r s . capacitive loads larger than 500pf require the use of r s . figure 32. typical topology for driving a capacitive load driving a capacitive load introduces phase-lag into the output signal, which reduces phase margin in the amplifier. the unity gain foll ower is the most sensitive configuration. in a unity gai n follower configuration, the amplifier requires a 300 ?? series resistor to drive a 100pf load.
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fan4852 ? rev. 4.0.0 14 fan4852 ? 9mhz low-power dual cmos amplifier layout considerations general layout and supply bypassing play major roles in high-frequency performance. fairchild evaluation boards help guide high-frequency layout and aid in device testing and characterization. follow the steps below as a basis for high-frequency layout: 1. include 6.8 f and 0.01 f ceramic capacitors. 2. place the 6.8 f capacitor within 0.75 inches of the power pin. 3. place the 0.01 f capacitor within 0.1 inches of the power pin. 4. remove the ground plane under and around the part, especially near the input and output pins, to reduce parasitic capacitance. minimize all trace lengths to reduce series inductances. refer to the evaluation board layouts shown in figure 33 for more information. when evaluating only one channel, complete the following on the unused channel: 1. ground the non-inverting input. 2. short the output to the inverting input. evaluation board description fan4852-010 single channel, dual supply figure 33. evaluation board schematic - + 3 2 1 8 4 out 1 sma +in 1 sma v- - + 5 6 7 8 4 v+ v- c9 1uf - in 1 sma r-c8 10k v- r6 0.0 r-c4 10k r7 10k r11 50 r3 10k c12 0.1uf out 2 sma - in 2 sma v+ r5 50 r2 0.0 v+ r1 10k c10 0.1uf pwrcon v+ gnd v- c11 1uf r8 0.0 r9 10k r10 0.0 r4 0.0 +in 2 sma r12 0.0
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fan4852 ? rev. 4.0.0 15 fan4852 ? 9mhz low-power dual cmos amplifier physical dimensions figure 34. 8-lead, molded small-outline package (msop) package drawings are provided as a service to customers consi dering fairchild components. drawings may change in any manner without notice. please note the revision and/or date on the drawi ng and contact a fairchild semiconductor representative to ver ify or obtain the most recent revision. package specifications do not expand the terms of fairchild?s worldwide terms and conditions, specifically the warranty therein, which covers fairchild products. always visit fairchild semiconductor?s online packa ging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ .
? 2010 fairchild semiconductor corporation www.fairchildsemi.com fan4852 ? rev. 4.0.0 16 fan4852 ? 9mhz low-power dual cmos amplifier

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