dual operational amplifiers lm4558 features no frequency compensation required no latch-up large common mode and differential voltage range parameter tracking over temperature range gain and phase match between amplifiers internally frequency compensated low noise input transistors moisture sensitivity level 3 ordering information descriptions the lm4558 devices is a monolithic integrated circuit designed for dual operational amplifier. the high common-mode input voltage range and the absence of lat ch-up make these amplifiers ideal for voltage-follower applications. the devices are short-circuit pr otected and the internal frequency compen -sation ensures stability without external components. the lm4558 is characterized for operation from 0 o c to 70 o c. schematic (each amplifier) 2008 - ver. 1.0 htc device package lm4558d 8 sop - 1 - lm4558n 8 dip sop8/ dip8 pin configulation out vcc+ in- in+ vcc- 1 2 3 4 8 7 6 5 in1(-) in1 (+) gnd in2 (+) vcc out out2 in2 (-) a + - b - + sop-8 pkg dip-8 pkg
dual operational amplifiers lm4558 absolute maximum ratings over operating free-air temperature range. supply voltage differential input voltage input voltage duration of output short circuit to ground, one amplifier at a time short temperature range recommended o p eratin g conditions electrical characterisitics at specified free-air temperature, v cc = 15v(unless otherwise noted) v io vo=0 input offset voltage v 01 /v 02 r s =100 crosstalk attenuation f=1khz i io input offset current r j input resistance i ib input bias current v icr common-mode input voltage range r l = 10 ? vom r l = 2 ? maximum output voltage swing r l 2? a vd v o =10v large-signal differential r l 2? voltage amplification cmrr v cc =5v to max, common-mode rejection ratio v ic =v icr min k svs supply voltage sensitivity ratio(v io /v cc ) v 01 /v 02 crosstalk attenuation i cc v o =o, no load supply current (both amplifiers) * all characteristics are measured under open-loop conditions w ith zero common-mode input voltage unless otherwise specified. full range is 0 o c to 70 o c. t a (min) = 0 o c. t a (max)= 70 o c. htc unit o c v - 2 - 5 -5 25 2.5 5.6 ? supply voltage operating free-air temperature, t a ? 120 0 vcc+ vcc- lm4558 min f=1 khz to 20khz 25 ? 25 30 150 ?/v 25 65 80 v/? full range 25 25 50 350 5 200 ? 500 25 o c -65 to 150 t stg unit typ max 0.5 5 ? 6 min lm4558 unit v v lm4558 22 30 v -15 70 25 full range 0 v i 15 v cc v i(diff) max 15 unlimited v 25 v 10 13 25 full range 25 full range m 140 500 ? 1500 5 parameter test conditions* 25 full range open a vd =100 85 100 vo=0 25 vo=0 25 12 14 10 14 12 t a (max) 6.6 2.0 5.0 3.0 t a (min)
dual operational amplifiers lm4558 typical performance characteristic s htc - 3 - input noise(peak) (?) input noise frequency(?) 0 40 140 120 100 80 60 20 v 0 -output voltage(vp-p) frequency(hz) 10 output characterisitics current sinking 0 source resistance() 0 100 1.0k 10m 10 1000 100 10k 10 100k figure 1. burst noise vs source resistance input noise ( rms ) ( ? ) figure 2. rms noise vs source resistance source resistance() 0 100 1.0k 1m 1.0 100 10 10k 10 100k output noise ( rms ) ( m v figure 3. output noise vs source resistance source resistance() 0 100 1.0k 1m 0.1 10 1.0 10k 10 100k 10 100 1.0k 10k 100k figure 4. spectral noise density gv =10, rs=100? frequency(?) -20 a vol. voltage gain (db) 1.0 10 100 1.0k 10k 100k 1m 10m 0 20 40 60 80 100 120 140 figure 5. open loop frequency response frequency(?) phase margin (decrees) 1.0 10 100 1.0k 10k 100k 1m 10m figure 6. phase margin vs frequency 20 40 60 80 100 120 140 160 180 unity g v o -output voltage (v peak ) load resistance () 1. 7. 5. 3. 9. 1 10 1 1 50 1.0 2.0 10 20 50 100 figure 7. positive output voltage swing vs load resistance 15 supplies 9 6 3 12 v o -output voltage (v peak ) load resistance () 1.0 7.0 5.0 3.0 9.0 11 100 13 15 500 1.0k2.0k 10k 20k 50k 100k figure 7. negative output voltage swing vs load resistance 15 supplies 9 6 3 12 100 1.0k 10k 100k 1000k 1m 4 8 12 16 24 20 figure 9. power bandwidth g v =1000 g v =100 g v =10 g v =1
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