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NAU8220 datasheet revision 1. 7 page 1 of 15 2vrms audio line driver 1 g eneral description the NAU8220 is a high quality 2vrms analog input and output line driver. this device includes an integrated charge pump enabling true ground referenced inputs and outputs and full 5.6vpp output levels, while operating from only a single 3.3v positive supply voltage. additionally, the NAU8220 includes pop/click elimination features and high immunity to power supply and other system noise. this enables fast and efficient system integration while minimizing external component costs. the NAU8220 is specified for operation from - 40c to +85c, it is packaged in a cost - effecti ve and space - saving 14 - lead sop and tssop package s . 2 f eatures ? operating voltage: 3.0 - 3.6v ? full 2vrms output using only 3.3vdc supply ? true ground referenced analog outputs ? l ow cost, small footprint package ? automatic pop/click elimination and output muting for power - on ? 10 8 db snr a - weighted performance ? > 90db thd+n ? 114 db mute attenuation ? < 1mv output offset ? 1 1 0db channel separation at 1khz ? low external parts count ? high sy stem noise immunity ? package s : pb free 14 - pin sop and tssop ? operating temperature range: - 40 to +85c ? 8 kv hbm protection on line outputs www.datasheet.co.kr datasheet pdf - http://www..net/
NAU8220 datasheet revision 1. 7 page 2 of 15 3 block diagram 4 p in configuration n a u 8 2 2 0 c h a r g e p u m p r i n n r i n p l i n p l i n n m u t e l o g i c m u t e b r o u t l o u t c p v e e c n n a u 8 2 2 0 1 2 3 4 5 6 7 1 4 1 3 1 2 1 1 1 0 9 8 r i n p r i n n r o u t g n d m u t e b v e e c n l i n p l i n n l o u t u v p g n d v d d c p www.datasheet.co.kr datasheet pdf - http://www..net/
NAU8220 datasheet revision 1. 7 page 3 of 15 5 p in description pin no. pin name type description 1 r inp ai right channel positive input 2 rinn ai right channel negative input 3 r out o right channel line output 4 gnd p ground 5 muteb i mute bar 6 vee io charge pump decoupling output (negative voltage) 7 cn io charge pump capacitor negative node 8 cp io charge pump capacitor positive node 9 vdd p positive voltage supply 10 gnd p ground 11 uvp i under voltage protection 12 l out o lef t channel line output 13 l in n ai lef t channel negative input 14 l inp ai left channel positive input table no. 1 www.datasheet.co.kr datasheet pdf - http://www..net/
NAU8220 datasheet revision 1. 7 page 4 of 15 6 table of contents 1 general description ................................ ................................ ................................ ................................ . 1 2 features ................................ ................................ ................................ ................................ ......................... 1 3 block diagram ................................ ................................ ................................ ................................ ............. 2 4 pin configuratio n ................................ ................................ ................................ ................................ ....... 2 5 pin description ................................ ................................ ................................ ................................ ............. 3 6 table of contents ................................ ................................ ................................ ................................ ...... 4 7 absolute maximum rat ings ................................ ................................ ................................ ..................... 5 8 recommended operatin g conditions ................................ ................................ ................................ .. 5 9 electrical characteristics ................................ ................................ ................................ .................. 6 10 functional descripti on ................................ ................................ ................................ ............................ 7 11 typical application diagram ................................ ................................ ................................ .................. 8 12 typical characterist ics ................................ ................................ ................................ ........................ 10 13 package specificatio n ................................ ................................ ................................ ............................ 13 14 ordering information ................................ ................................ ................................ ............................. 14 www.datasheet.co.kr datasheet pdf - http://www..net/
NAU8220 datasheet revision 1. 7 page 5 of 15 7 absolute maximum ratings description symbol condition minimum maximum unit vdd supply voltage vdd vdd gnd - 0.3 +4.0 v digital input voltage range d v in d v in gnd gnd C 0.3 vdd + 0.30 v analog input voltage a v in a v in vee vee C 0.3 vdd + 0.30 v operating temperature ta - 40 +85 c storage temperature tst - 65 +150 c caution: do not operate at or near the maximum ratings listed for extended periods of time. exposure to such conditions may adversely influence product reliability and result in failures not covered by warranty. follow ic handling procedures to avoid esd damage. 8 recommended operating conditions description symbol minimum typical maximum unit supply voltage vdd 3.0 3.3 3.6 v ground gnd 0 v www.datasheet.co.kr datasheet pdf - http://www..net/
NAU8220 datasheet revision 1. 7 page 6 of 15 9 e lectrical characteristics test conditions vdd = 3.3v, ta = +25 c, 1 v rms 1 khz signal, r1 (in) = 15k , r2 (fb) = 30k , cp = 1f, rl = 10k unless otherwise stated. parameter sym test conditions min typ max unit full scale output voltage vout 2.0 - vrms signal to noise ratio snr a - weighted 90 108 - db dynamic range dnr a - weighted 90 108 - db total harmonic distortion + noise thd+n 20 khz lpf 90 102 - db power supply rejection ratio ps r r vdd = 3.0 v to 3.6 v 100 db power supply rejection ratio 1 ac ps r r 100hz - 90 - db 1khz 7 5 - db 20khz - 60 - db channel separation 1khz - - 110 - db noise voltage vn a - weighted - 8 - v mute noise voltage vn a - weighted muteb=gnd - 4 - v output offset - 1 0.5 +1 mv output impedance when muted zm muteb = gnd 0. 6 input to output attenuation when muted mdb muteb = gnd 114 db uvp detect voltage vuvp 1.2 volts uvp feedback current iuvp 5 a current limit ilimit output = gnd 30 ma ac supply current idd vdd = 3.3 volts 15 ma charge pump switching frequency fcp pin cp 300 khz low input level vil muteb 40 % vdd high input level vih muteb 60 % vdd input current iin muteb gnd or vdd - 1 +1 a notes 1. the performance of ac psrr depends upon the board layout . www.datasheet.co.kr datasheet pdf - http://www..net/
NAU8220 datasheet revision 1. 7 page 7 of 15 10 functional description the NAU8220 uses charge pump mechanism to get the full output signal swing. the charge pump uses the charge pump capacitor to put a negative voltage onto vee, the charge pump decoupling node. an additional capacitor is needed from vdd to gnd, pin 10. a lo w resistance one micro - farad capacitor is recommended for each of these capacitor s . all of these connections need to be short. the negative voltage developed on pin 6 vee enables the outputs to swing both positive and negative from gnd. signal gain is set by the ratio of external resistors. the input signal can be either single ended or differential. the typical single ended application diagram is shown in figure 1 and differential in figure 2 . for single ended inputs, the signal polarity of the output is inverted. a gain of two us ing r1 = 15 k ohms and r2 = 30 k ohms is recommended for good performance. r3 of 10 k ohms helps to reject unwanted signals by balancing the inputs. for larger gains, r2 can be increased. r1 can also be decreased, but 10 k ohms is the minimum recommended. f or example, a gain of three could use r1 = 10 k ohms, r2 = 30 k ohms, and r3 = 7.5 k ohms . for better performance r3 and r6 should be approximately equal to r1||r2 and r4||r5. gains larger than ten are not recommended. large gains will have more noise and distortion than the nominal gain of two. the following table shows the r1 and r2 resistance values for different gain settings. gain input resistance, r1 feedback resistance, r2 - 1 10k ohms 10k ohms - 2 15k ohms 30k ohms - 3 10k ohms 30k ohms - 10 10k ohms 100k ohms load of the line driver outputs is from 600 ohms minimum to 10 k ohms nominal. with vdd at 3.3 volts, the maximum output signal is 2 volts rms. capacitive loads up to 200 pf can be driven. if larger capacitive loads such as 2.2 nf (c pc ) n eed to be driven, then a resistance of at least 33 ohms (r pc) should be added in series to provide both stability and protection. if this resistor and capacitor are added for protection, then the components need to be properly rated. for example, 100 volts rating for the capacitor may be needed to survive an output surge. for best output offset voltages, the inputs can be ac coupled. upon the application of power to the vdd pin, the part will enter into a pop reduction mode which applies a resistive load ing to the two outputs. after the vee pin reaches more than about 1.5 volts, a power up sequence begins that places the outputs into the mute condition. this condition is held until both the muteb pin is held high and the uvp pin exceeds about 1.25 volts. when the muteb pin rises, the outputs will follow the input signals. this pin should not be raised until a valid signal is available. the muteb pin is driven by a logic signal to gnd or vdd. the mute condition can be entered from normal operation by pulli ng muteb low. if power is interrupted, the uvp pin can be used to force the part into the mute condition. the uvp pin can force the part into the mute condition when the power supply voltage drops below the desired voltage. if this function is not needed, the uvp pin should be connected to vdd. feed back is provided by a nominal 5 a current developed across the external resistors applied . the turn on voltage sets the ratio of r11 and r12 compared to the internal 1.22 volt reference. the formula for turn on www.datasheet.co.kr datasheet pdf - http://www..net/
NAU8220 datasheet revision 1. 7 page 8 of 15 voltage is v on = 1.22v * (r11 + r12)/r11 and the formula for the turn off voltage is v off = v on - (5ua * r12). for example, for a turn on voltage of 3.0 volts and a turn off voltage of 2. 5 volts, the c alculated resistors are r11 = 68 . 5 k and r12 = 100 k , or using standard values, r11 = 68k and r12 = 100k . important note: when using a ldo, the turn - on and turn - off voltages for the uvp should be set higher than the sum of 3.3v and the minimum required voltage drop across the ldo, to ensure proper operat ion. 11 t ypical application diagram single input configuration: figure 1 n a u 8 2 2 0 1 2 3 4 5 6 7 1 4 1 3 1 2 1 1 1 0 9 8 r i n p r i n n r o u t g n d m u t e b v e e c n l i n p l i n n l o u t u v p g n d v d d c p r i g h t i n p u t l e f t i n p u t r 6 r 3 c 1 c 4 r 1 r 2 r 4 r 3 3 3 3 3 2 . 2 n f 2 . 2 n f 1 u f 1 u f 1 u f r i g h t o u t p u t m u t e b l o g i c i n p u t l e f t o u t p u t r 1 1 r 1 2 1 0 u f s y s t e m s u p p l y l i n e a r l o w d r o p o u t r e g u l a t o r r 1 = r 4 = 1 5 k o h m s r 2 = r 5 = 3 0 k o h m s r 3 = r 6 = 1 0 k o h m s c 1 = c 4 = 2 . 2 u f www.datasheet.co.kr datasheet pdf - http://www..net/
NAU8220 datasheet revision 1. 7 page 9 of 15 differential input configuration: figure 2 n a u 8 2 2 0 1 2 3 4 5 6 7 1 4 1 3 1 2 1 1 1 0 9 8 r i n p r i n n r o u t g n d m u t e b v e e c n l i n p l i n n l o u t u v p g n d v d d c p r i g h t i n p u t - + l e f t i n p u t + - r 7 r 3 c 1 c 4 r 1 r 2 r 5 r 6 3 3 3 3 2 . 2 n f 2 . 2 n f 1 u f 1 u f 1 u f r i g h t o u t p u t l e f t o u t p u t r 1 1 1 0 u f l i n e a r l o w d r o p o u t r e g u l a t o r r 1 = r 3 = r 5 = r 7 = 1 5 k o h m s r 2 = r 4 = r 6 = r 8 = 3 0 k o h m s c 1 = c 2 = c 3 = c 4 = 2 . 2 u f c 2 r 4 r 8 r 1 2 s y s t e m s u p p l y m u t e b l o g i c i n p u t c 3 www.datasheet.co.kr datasheet pdf - http://www..net/
NAU8220 datasheet revision 1. 7 page 10 of 15 12 typical characteristics test conditions vdd = 3.3v, ta = +25 c, 1khz signal, r1 (in) = 15k , r2 (fb) = 30k , cp = 1f, rl = 10k , c p c = 2200pf, r p c = 33 ohms unless otherwise stated. total harmonic distortion + noise vs frequency total harmonic distortion + noise vs output voltage 0 0.002 0.004 0.006 0.008 0.01 10 100 1000 10000 100000 thd+n (%) frequency (hz) rl = 10k ohms 2v rms 1v rms 0 0.002 0.004 0.006 0.008 0.01 10 100 1000 10000 100000 thd+n (%) frequency (hz) rl= 600 ohms with out r pc and c pc 2v rms 1v rms 0.0001 0.001 0.01 0.1 1 10 0 1 2 3 thd+n (%) vout rms (v) rl=10k ohms, f = 100 hz 0.0001 0.001 0.01 0.1 1 10 0 1 2 3 thd+n (%) vout rms (v) rl=600 ohms, f= 100 hz www.datasheet.co.kr datasheet pdf - http://www..net/
NAU8220 datasheet revision 1. 7 page 11 of 15 0.0001 0.001 0.01 0.1 1 10 0 1 2 3 thd+n (%) vout rms (v) rl=10k ohms, f = 1khz 0.0001 0.001 0.01 0.1 1 10 0 1 2 3 thd+n (%) vout rms (v) rl=600 ohms, f = 1khz 0.0001 0.001 0.01 0.1 1 10 0 1 2 3 thd+n (%) vout rms (v) rl=10k ohms, f = 10khz 0.0001 0.001 0.01 0.1 1 10 0 1 2 3 thd+n (%) vout rms (v) rl=600 ohms, f = 10khz www.datasheet.co.kr datasheet pdf - http://www..net/
NAU8220 datasheet revision 1. 7 page 12 of 1 5 cross talk vs frequency - 160 - 140 - 120 - 100 - 80 - 60 - 40 - 20 0 10 100 1000 10000 100000 crosstalk (db) frequency (hz) crosstalk right - >left left - > right www.datasheet.co.kr datasheet pdf - http://www..net/
NAU8220 datasheet revision 1. 7 page 13 of 15 13 p ackage specification 13.1 sop - 14 p ackage control demensions are in milmeters . e e 1 14 8 7 www.datasheet.co.kr datasheet pdf - http://www..net/
NAU8220 datasheet revision 1. 7 page 14 of 15 13.2 tssop - 14 p ackage (14l 4.4x5.0 mm^2) www.datasheet.co.kr datasheet pdf - http://www..net/
NAU8220 datasheet revision 1. 7 page 15 of 15 14 o rdering information nuvoton part number description nau8 220 _ _ important notice nuvoton products are not designed, intended, authorized or warranted for use as components in systems or equipment intended for surgical implantation, atomic energy control instruments, airplane or spaceship instruments, transpor tation instruments, traffic signal instruments, combustion control instruments, or for other applications intended to support or sustain life. furthermore, nuvoton products are not intended for applications wherein failure of nuvoton products could result or lead to a situation wherein personal injury, death or severe property or environmental damage could occur. nuvoton customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify nuvoton for any damages resulting from such improper use or sales. package type: s = 14 - pin sop package w = 14 - pin tssop package package material: g = pb - free package / green www.datasheet.co.kr datasheet pdf - http://www..net/

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