1/7 low voltage compander description outline drawing the sl5020 contains two variable gain circuits configured for compressing and expanding the dynamic range of an audio signal. one circuit is configured as an expander, while the other circuit can be configured as a compressor or expander. each circuit has a full wave rectifier to provide average value information to a variable gain cell located in either the input stage or the feedback path. an internal temperature stable bandgap reference dip14 provides the necessary precision voltages and currents required. it contains also compressor and expander mute circuit. feature low voltage operation vopr = 1.8 ~ 5.0v decreasing external component built in compressor and expander mute circuit unity gain level set a 100mvrms sop14 response time adjustable tiger electronic co.,ltd
sl5020 2/7 block diagram absolute maximum ratings (ta=25 c) characteristic symbol value unit maximum supply voltage vcc 10 v power dissipation p d 410 mw storage temperature range tstg -55~150 c operating conditions z operating supply voltage : 1.8 ~ 5.0 v z operating temperature range : -20 ~ 70c z input frequency range : 100hz ~ 20khz z input voltage : compressor input = 600mvrms (vcc=3v) expander input = 260mvrms
sl5020 3/7 pin voltage and description pin no symbol voltage description 1 v ref 1.3 bandgap voltage 2 exp.mute 1.4 expander mute adjust 3 exp.filter 0~0.6 expander filter. connect to an external capacitor to filter the full wave rectifier?s output. this capacitor affects attack & delay times, as well as low frequency accuracy. 4 exp.output 1.5 output of the expander amplifier. 5 exp.input 1.5 expander input. nominally signal range is 3.16mvrms to 260mvrms. must be capacitor coupled to the signal source 6 v b 2.2 an internal reference voltage. this is an ac ground, and must be well filtered to obtain high power supply rejection and low crosstalk. 7 gnd gnd ground 8 com.feedback 1.5 input to the compresso r variable gain stage and rectifier. 9 com.cf 1.5 normally, this is connected to the compressor?s output through filtered dc feedback path. 10 com.input 1.5 compressor input, normally, signal range is 100 vrms to 1.0vrms. must be capacitor coupled to the signal source. 11 com.output 1.5 output of the compressor amplifier. 12 com.filter 0~0.6 compressor filter. connect to an external capacitor to filter the full wave rectifier?s output. this capacitor affects attack & decay times, and low frequency accuracy 13 com.mute 1.4 compressor mute adjust. 14 vcc 3 power supply pin. connect to power supply providing between 1.8 and 5.0v.
sl5020 4/7 electrical characteristics (unless otherwise specified: ta=25 c, vcc=3v, f=1khz) characteristics symbol test conditions min typ max unit supply current icc no signal 3.1 ma compressor section 0db gain gc 0 vinc=100mvrms, 0db -1.5 0 1.5 db gc 1 vinc=316mvrms, 10db -1 0 1 db gc 2 vinc=10mvrms, -20db -1 0 1 db gc 3 vinc=1mvrms, -40db -1 0 1 db gain error (note 1) gc 4 vinc=100 vrms,-60db -1 0 1 db distortion thdc vinc=100mvrms, f=1khz 0.3 1.5 % noise output vnoc rg=600 ? 0.8 5 mvrms ripple rejection ratio rrc vcc=3v (dc), 1khz, 100mvrms -25 -18 db crosstalk(c e) ctc vinc=100mvrms, exp output -72 -50 db muting attenuation attc vinc=100mvrms, vpin13=gnd -65 -50 db input impedance rinc pin 10 20 k ? expander section 0db gain ge 0 vine=100mvrms, 0db -1.5 0 1.5 db ge 1 vine=178mvrms, 5db -1 0 1 db ge 2 vine=31.6mvrms, -10db -1 0 1 db ge 3 vine=10mvrms, -20db -1 0 1 db gain error (note 1) ge 4 vine=3.16mvrms,-30db -1 0 1 db distortion thde vine=100mvrms, f=1khz 0.4 1.5 % noise output vnoe rg=600 ? 0.06 5.0 mvrms ripple rejection ratio rre vcc=3v (dc), 1khz, 100mvrms -58 -38 db crosstalk(e c) cte vine=100mvrms, com output -34 -24 db muting attenuation atte vine=316mvrms, vpin2=gnd -70 -50 db input impedance rine pin 4 4.3 k ? (note 1) gain error= (v out -20dbv)-v in k k: compressor=0.5 expander=2
sl5020 5/7 test circuit application circuit
sl5020 6/7 characteristic curves
sl5020 7/7
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