| SYMBOL | PARAMETER | CONDITIONS | MIN | TYP | MAX | UNIT |
| lO | DC output current | pins OUTA and OUTB connected to ground | -2 | | | mA |
| pins OUTA and OUTB connected to Vcc | 0.3 | | | mA |
| Zo | output impedance | | | 80 | 100 | l |
| Vno(rms) | equivalent input noise voltage (RMS value) | NR off; unweighted; f= 20 Hz t0 20 kHz; Rsource = o I | | 0.7 | 1.4 | ccV |
| VTD | AMS timing (DC level) | resistor Rt connected to pin TD | Vcc -3 | | Vcc | V |
| Voffset(DC) | DC offset voltage at pins OUTA and OUTB | f = 900 MHz; Vi(rms) = 6 V | | 40 | | mV |
| Voffset(AD) | overall offset voltage between AGND (pin 20) and DGND (pin 29) | | -0.4 | | +0.4 | |
| Level adjustment |
| GCR | gain control range | note l | 24.2 | 2512 | 2612 | dB |
| Gstep | step size | | | 0.4 | | dB |
| GE | step error between any adjacent step | | | | 0.4 | dB |
| Switching thresholds |
| OPTIONAL EQUALIZATION TIME CONSTANT SWITCH pin EQS) |
| VIL | LOW-Ievel input voltage | 70 ~s; IL > -200q | -0.3 | | +0.8 | V |
| VOL | LOW-Ievel output voltage | 70 ccs; IL " 1 mA | | | 0.4 | V |
| VIH | HIGH-Ievel input voltage | 120CS | 2 | | | V |
| VOH | HIGH-Ievel output voltage | 120 ccs; IL > -50 | 2.8 | | 3.3 | V |
| OPTIONAL HEAD SWITCH pin HS) |
| VIL | LOW-Ievel input voltage | INPUT 2 0n; IL > -150A | -0.3 | | +0.8 | V |
| VOL | LOW-Ievel output voltage | INPUT 2 0n; IL " 10 0A | | | 0.4 | V |
| VIH | HIGH-Ievel input voltage | INPUT l on | 2 | | | V |
| VOH | HIGH-Ievel output voltage | INPUT l on; IL > -50A | 2.8 | | 3.3 | V |
| Search modes |
| BLANK SKIP |
| BStrl(M_P) | dynamic level threshold | blank skip mode; f = 10 kHz | -30 | -27 | -24 | dB |
| tsw(P-M) | switching time pause-to-music | blank skip mode; f = 10 kHz; signal on channel A and B; note 2 | 2.1 | 4.15 | 6.3 | ms |
| blank skip mode; f = 10 kHz; signal on one channel; note 2 | 4.1 | 8.3 | 12.5 | ms |
| tsw(M-P) | switching time music-to-pause | blank skip mode; f = 10 kHz; note 2 | 10 | 19 | 30 | ms |
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backup. It can supply a minimum backup power of lOOmW.The boost converteroperatesin a modified pulse skipping mode; each switch cycle transfers a known amount of charge from the backup cell to the regulated output.This prevents uncontrolled discharge ofthe backup cell and allows the LTC1558 to accurately measure the charge removed from the backup cell by counting the charge pulses.
SI9102DN0 SI9102DN0 SI9102DN0 on stock| lA2A L# | 1.4A 1t | A 1.8A r_r | 2.OA |
| | | -_- ___ _-__ - |
| | | | ____ |
| ____ | |
| | _- -____ | 0.4A |
| | r ------ ------ | ------- - | | 0.2A |
| j7 | | | | IB=O |
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| VREF= 3.9V | | | -r |
| -VREF = 2.4V -IJ | | | 7 |
| | /REF= 1.9' | l | | | 1.2V |
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