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data sheet ?2008-2010 cadeka microcircuits llc www.cadeka.com NJM4558 dual 4v to 36v amplifer rev 1a NJM4558 dual 4v to 36v amplifer features n unity gain stable n 100db voltage gain n 5.5mhz gain bandwidth product n 0.5m input resistance n 100db power supply rejection ratio n 95db common mode rejection ratio n 4v to 36v single supply voltage range n 2v to 18v dual supply voltage range n gain and phase match between amps n pb-free soic-8 applications n active filters n audio amplifers n audio ac-3 decoder systems n general purpose dual ampliifer general description the NJM4558 is a dual voltage feedback amplifer that is internally frequency compensated to provide unity gain stability. the NJM4558 offers 3.5mhz of bandwidth at a gain of 2. the NJM4558 also features high gain, low input voltage noise, high input resistance, and superb channel separation making it well suited for audio flter applications in set-top-boxes, dvd players, and televisions. the NJM4558 is designed to operate over a wide power supply voltage range, 2v to 18v (4v to 36v). it utilizes an industry standard dual amplifer pin- out and is available in a pb-free, rohs compliant soic-8 package. typical application - 2nd order low-pass audio filter ordering information part number package pb-free rohs compliant operating temperature range packaging method NJM4558iso8x soic-8 yes yes -40c to +85c reel moisture sensitivity level for all parts is msl-1. v c c =+12 v c 6 0.1f r5 10k? r4 6.8k? r3 3.3k? r2 10k? r1 20k? c5 1000pf c 3 0.1f c 1 150pf c 4 22f/25v c 2 22f/25v v in v out + ? 8 1(7) 2 (6) 4 v e e =-12 v 3 (5) clc2058 NJM4558
data sheet NJM4558 dual 4v to 36v amplifer rev 1a ?2008-2010 cadeka microcircuits llc www.cadeka.com 2 NJM4558 pin description pin no. pin name description 1 out1 output, channel 1 2 -in1 negative input, channel 1 3 +in1 positive input, channel 1 4 -v s negative supply 5 +in2 positive input, channel 2 6 -in2 negative input, channel 2 7 out2 output, channel 2 8 +v s positive supply NJM4558 pin confguration 2 3 4 5 6 7 8 out2 +in1 -in2 +in2 1 -in1 out1 -v s +v s
data sheet NJM4558 dual 4v to 36v amplifer rev 1a ?2008-2010 cadeka microcircuits llc www.cadeka.com 3 absolute maximum ratings the safety of the device is not guaranteed when it is operated above the absolute maximum ratings. the device should not be operated at these absolute limits. adhere to the recommended operating conditions for proper de - vice function. the information contained in the electrical characteristics tables and typical performance plots refect the operating conditions noted on the tables and plots. parameter min max unit supply voltage 0 40 (20) v differential input voltage 60 (30) v input voltage 30 (15) v power dissipation (t a = 25c) - soic-8 500 mw reliability information parameter min typ max unit junction temperature 150 c storage temperature range -65 150 c lead temperature (soldering, 10s) 260 c package thermal resistance soic-8 100 c/w notes: package thermal resistance ( q ja ), jdec standard, multi-layer test boards, still air. recommended operating conditions parameter min typ max unit operating temperature range -40 +85 c supply voltage range 4 (2) 36 (18) v
data sheet NJM4558 dual 4v to 36v amplifer rev 1a ?2008-2010 cadeka microcircuits llc www.cadeka.com 4 electrical characteristics t a = 25c, +v s = +15v, -v s = -15v, r f = r g =2k, r l = 2k to v s /2, g = 2; unless otherwise noted. symbol parameter conditions min typ max units frequency domain response ugbw ss unity gain bandwidth g = +1, v out = 0.2v pp , v s = 5v, r f = 0 4.62 mhz g = +1, v out = 0.2v pp , v s = 30v, r f = 0 4.86 mhz bw ss -3db bandwidth g = +2, v out = 0.2v pp , v s = 5v 3.49 mhz g = +1, v out = 0.2v pp , v s = 30v 3.55 mhz bw ls large signal bandwidth g = +2, v out = 1v pp , v s = 5v 1.25 mhz g = +2, v out = 2v pp , v s = 30v 0.74 mhz gbwp gain-bandwidth product 5.5 mhz time domain response t r , t f rise and fall time v out = 0.2v step; (10% to 90%), v s = 5v 100 ns v out = 0.2v step; (10% to 90%), v s = 30v 98 ns os overshoot v out = 0.2v step 12 % sr slew rate 2v step, v s = 5v 2.6 v/s 4v step, v s = 30v 2.8 v/s distortion/noise response thd+n total harmonic distortion plus noise v out = 1v rms , f = 1khz, g = 2, r l = 10k, v s = 30v 0.002 % e n input voltage noise > 1khz, v s = 5v 10 nv/hz > 1khz, v s = 30v 10 nv/hz x talk crosstalk channel-to-channel, 500khz 65 db dc performance v io input offset voltage (1) v s = 5v to 30v 1 5 mv i b input bias current (1) v cm = 0v 70 400 na i os input offset current (1) v cm = 0v 10 100 na psrr power supply rejection ratio (1) dc, r s 10k 80 100 db a ol open-loop gain (1) r l = 2k, v out = 1v to 11v 85 100 db i s supply current (1) total, r l = 2.5 4.5 ma input characteristics cmir common mode input range (1,3) +v s = 30v 12 v cmrr common mode rejection ratio (1) dc, r s 10k 70 95 db r in input resistance 0.5 m output characteristics r out output resistance 45 v out output voltage swing (1) r l = 2k 10 13 v r l = 10k 12 14 v i source output current, sourcing v in+ = 1v, v in- = 0v, v out = 2v 35 ma i sink output current, sinking v in+ = 0v, v in- = 1v, v out = 2v 60 ma notes: 1. 100% tested at 25c at v s = 15v.
data sheet NJM4558 dual 4v to 36v amplifer rev 1a ?2008-2010 cadeka microcircuits llc www.cadeka.com 5 typical performance characteristics t a = 25c, +v s = +15v, -v s = -15v, r f = r g =2k, r l = 2k to v s /2, g = 2; unless otherwise noted. small signal pulse response large signal pulse response large signal frequency response -3db bandwidth vs. v out non-inverting frequency response inverting frequency response - 15 - 10 - 5 0 5 0.1 1 10 100 normalized gain (db) frequency (mhz) g = 1 r f = 0 g = 2 g = 5 g = 10 v out = 0.2v pp - 25 - 20 - 15 - 10 - 5 0 5 0.1 1 10 normalized gain (db) frequency (mhz) g = - 1 g = - 2 g = - 5 g = - 10 v out = 0.2v pp - 25 - 20 - 15 - 10 - 5 0 5 0.1 1 10 normalized gain (db) frequency (mhz) vout = 4vpp vout = 2vpp 0 1 2 3 4 5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 - 3db bandwidth (mhz) v out (v pp ) - 0.15 - 0.1 - 0.05 0 0.05 0.1 0.15 0 2 4 6 8 10 output voltage (v) time (us) - 3 - 2 - 1 0 1 2 3 0 2 4 6 8 10 output voltage (v) time (us)
data sheet NJM4558 dual 4v to 36v amplifer rev 1a ?2008-2010 cadeka microcircuits llc www.cadeka.com 6 typical performance characteristics t a = 25c, +v s = +5v, -v s = gnd, r f = r g =2k, r l = 2k to v s /2, g = 2; unless otherwise noted. small signal pulse response large signal pulse response large signal frequency response -3db bandwidth vs. v out non-inverting frequency response inverting frequency response - 15 - 10 - 5 0 5 0.1 1 10 100 normalized gain (db) frequency (mhz) g = 1 r f = 0 g = 2 g = 5 g = 10 v out = 0.2v pp - 25 - 20 - 15 - 10 - 5 0 5 0.1 1 10 normalized gain (db) frequency (mhz) g = - 1 g = - 2 g = - 5 g = - 10 v out = 0.2v pp - 25 - 20 - 15 - 10 - 5 0 5 0.1 1 10 normalized gain (db) frequency (mhz) vout = 1vpp vout = 2vpp 0 1 2 3 4 5 0.0 0.5 1.0 1.5 2.0 - 3db bandwidth (mhz) v out (v pp ) 2.35 2.40 2.45 2.50 2.55 2.60 2.65 0 2 4 6 8 10 output voltage (v) time (us) 1 1.5 2 2.5 3 3.5 4 0 2 4 6 8 10 output voltage (v) time (us)
data sheet NJM4558 dual 4v to 36v amplifer rev 1a ?2008-2010 cadeka microcircuits llc www.cadeka.com 7 typical performance characteristics t a = 25c, +v s = +15v, -v s = -15v, r f = r g =2k, r l = 2k to v s /2, g = 2; unless otherwise noted. input offset voltage vs. temperature input bias current vs. temperature maximum output voltage swing vs. frequency maximum output voltage swing vs. r l open loop voltage gain vs. frequency supply current vs. temperature 0 20 40 60 80 100 120 0.001 0.01 0.1 1 10 100 1000 open loop gain (db) frequency (khz) rl=2k 2 2.2 2.4 2.6 2.8 3 3.2 - 40 - 20 0 20 40 60 80 100 120 supply current (ma) temperature ( c) 0 5 10 15 20 0.1 1 10 100 maximum swing voltage (v) frequency (khz) rl=2k, thd+n<5% - 16 - 12 - 8 - 4 0 4 8 12 16 0.1 1 10 output voltage swing (v) resistance load (k ) postive voltage swing negative voltage swing - 2 - 1 0 1 2 3 4 5 - 40 - 20 0 20 40 60 80 100 120 input offset voltage (mv) temperature ( c) 0 20 40 60 80 100 120 - 40 - 20 0 20 40 60 80 100 120 input bias current (na) temperature ( c)
data sheet NJM4558 dual 4v to 36v amplifer rev 1a ?2008-2010 cadeka microcircuits llc www.cadeka.com 8 typical performance characteristics t a = 25c, +v s = +15v, -v s = -15v, r f = r g =2k, r l = 2k to v s /2, g = 2; unless otherwise noted. functional block diagram supply voltage vs. supply current crosstalk vs. frequency - 2.5 - 2.4 - 2.3 - 2.2 2 2.1 2.2 2.3 2.4 2.5 2 4 6 8 10 12 14 16 18 iee (ma) icc (ma) supply voltage (+/ - v) iee icc - 85 - 80 - 75 - 70 - 65 - 60 - 55 - 50 0.1 1.0 crosstalk (db) frequency (mhz) - input + input v ee output v cc
data sheet NJM4558 dual 4v to 36v amplifer rev 1a ?2008-2010 cadeka microcircuits llc www.cadeka.com 9 application information basic operation figures 1, 2, and 3 illustrate typical circuit confgurations for non-inverting, inverting, and unity gain topologies for dual supply applications. they show the recommended bypass capacitor values and overall closed loop gain equations. + - r f 0.1f 6.8f output g = 1 + ( r f /r g ) input +v s -v s r g 0.1f 6.8f r l figure 1. typical non-inverting gain circuit figure 2. typical inverting gain circuit + - 0.1f 6.8f output g = 1 input +v s -v s 0.1f 6.8f r l figure 3. unity gain circuit power dissipation power dissipation should not be a factor when operating under the stated 2k ohm load condition. however, ap - plications with low impedance, dc coupled loads should be analyzed to ensure that maximum allowed junction temperature is not exceeded. guidelines listed below can be used to verify that the particular application will not cause the device to operate beyond its intended operat - ing range. maximum power levels are set by the absolute maximum junction rating of 150c. to calculate the junction tem - perature, the package thermal resistance value theta ja (? ja ) is used along with the total die power dissipation. t junction = t ambient + (? ja p d ) where t ambient is the temperature of the working environment. in order to determine p d , the power dissipated in the load needs to be subtracted from the total power delivered by the supplies. p d = p supply - p load supply power is calculated by the standard power equa - tion. p supply = v supply i rms supply v supply = v s+ - v s- power delivered to a purely resistive load is: p load = ((v load ) rms 2 )/rload eff the effective load resistor (rload eff ) will need to include the effect of the feedback network. for instance, rload eff in fgure 3 would be calculated as: r l || (r f + r g ) these measurements are basic and are relatively easy to perform with standard lab equipment. for design purpos - es however, prior knowledge of actual signal levels and load impedance is needed to determine the dissipated power. here, p d can be found from p d = p quiescent + p dynamic - p load quiescent power can be derived from the specifed i s val - ues along with known supply voltage, v supply . load power + - r f 0.1f 6.8f output g = - ( r f /r g ) for optimum input offset voltage set r 1 = r f || r g input +v s -v s 0.1f 6.8f r l r g r 1
data sheet NJM4558 dual 4v to 36v amplifer rev 1a ?2008-2010 cadeka microcircuits llc www.cadeka.com 10 can be calculated as above with the desired signal ampli - tudes using: (v load ) rms = v peak / 2 ( i load ) rms = ( v load ) rms / rload eff the dynamic power is focused primarily within the output stage driving the load. this value can be calculated as: p dynamic = (v s+ - v load ) rms ( i load ) rms assuming the load is referenced in the middle of the pow - er rails or v supply /2. figure 4 shows the maximum safe power dissipation in the package vs. the ambient temperature for the pack - ages available. 0 0.5 1 1.5 2 - 40 - 20 0 20 40 60 80 maximum power dissipation (w) ambient temperature ( c) soic - 8 figure 4. maximum power derating driving capacitive loads increased phase delay at the output due to capacitive loading can cause ringing, peaking in the frequency re - sponse, and possible unstable behavior. use a series re - sistance, r s , between the amplifer and the load to help improve stability and settling performance. refer to fig - ure 5. + - r f input output r g r s c l r l figure 5. addition of r s for driving capacitive loads overdrive recovery an overdrive condition is defned as the point when ei - ther one of the inputs or the output exceed their specifed voltage range. overdrive recovery is the time needed for the amplifer to return to its normal or linear operating point. the recovery time varies, based on whether the input or output is overdriven and by how much the range is exceeded. the NJM4558 will typically recover in less than 30ns from an overdrive condition. figure 6 shows the NJM4558 in an overdriven condition. - 20 - 10 0 10 20 - 10 - 5 0 5 10 0 10 20 30 40 50 output voltage (v) input voltage (v) time (us) output input v in = 7.5v pp g = 5 figure 6. overdrive recovery layout considerations general layout and supply bypassing play major roles in high frequency performance. c adeka has evaluation boards to use as a guide for high frequency layout and as an aid in device testing and characterization. follow the steps below as a basis for high frequency layout: ? include 6.8f and 0.1f ceramic capacitors for power supply decoupling ? place the 6.8f capacitor within 0.75 inches of the power pin ? place the 0.1f capacitor within 0.1 inches of the power pin ? remove the ground plane under and around the part, especially near the input and output pins to reduce para - sitic capacitance ? minimize all trace lengths to reduce series inductances refer to the evaluation board layouts below for more in - formation.
data sheet NJM4558 dual 4v to 36v amplifer rev 1a ?2008-2010 cadeka microcircuits llc www.cadeka.com 11 evaluation board information the following evaluation boards are available to aid in the testing and layout of these devices: evaluation board # products ceb006 NJM4558 evaluation board schematics evaluation board schematics and layouts are shown in fig - ures 7-9. these evaluation boards are built for dual- sup - ply operation. follow these steps to use the board in a single-supply application: 1. short -vs to ground. 2. use c3 and c4, if the -v s pin of the amplifer is not directly connected to the ground plane. figure 7. ceb006 schematic figure 8. ceb006 top view figure 9. ceb006 bottom view
data sheet NJM4558 dual 4v to 36v amplifer rev 1a ?2008-2010 cadeka microcircuits llc www.cadeka.com 12 typical applications 100? amp rv amp rv 1.8k? 39k? 1k? 680pf 10f audio_input l + ? 4 1 2 8 +v s 3 1/2 clc2058 dac load resistor 620? 470pf 150f audio_output l 10k? 5pf 1.8k? 39k? 1k? 680pf 10f audio_input r + + + + ? 7 6 5 1/2 clc2058 dac load resistor 620? 470pf 150f audio_output r 10k? 5pf 10k? 10k? 100? 0.1 f +v s 0.1 f 100f + 100f audio amplifier figure 10: typical circuit for filtering and driving audio in stb or dvd player applications - 7 - 6 - 5 - 4 - 3 - 2 - 1 0 1 0.1 1 10 100 1000 normalized gain (db) frequency (khz) v out = 5v pp figure 11: ac reponse of figure 10 (v s =10v, r l =630) - 100 - 95 - 90 - 85 - 80 - 75 - 70 - 65 - 60 - 55 - 50 0.1 1 10 100 1000 crosstalk (db) frequency response (khz) v out = 5v pp figure 12: cross-talk performance of figure 10 (v s =10v, r l =630) NJM4558 NJM4558
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