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STLC3055Q Datasheet(PDF) 3 Page - STMicroelectronics |
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STLC3055Q Datasheet(HTML) 3 Page - STMicroelectronics |
3 / 22 page THERMAL DATA Symbol Parameter Value Unit Rth j-amb Thermal Resistance Junction to Ambient Typ. 60 °C/W PIN DESCRIPTION N. Name Function 25 VPOS Positive supply input ranging from 5.5V to 15.8V. 34 BGND Battery Ground, must be shorted with AGND. 27 AGND Analog Ground, must be shorted with BGND. 16 ZAC AC impedance synthesis. 15 ZAC1 RX buffer output, the AC impedance is connected from this node to ZAC. 17 RS Protection resistors image (the image resistor is connected from this node to ZAC). 18 ZB Balance Network for 2 to 4 wire conversion (the balance impedance ZB is connected from this node to AGND. ZA impedance is connected from this node to ZAC1). 20 TX 4 wire output port (TX output). The signal is referred to AGND. If connected to single supply CODEC input it must be DC decoupled with proper capacitor. 14 RX 4 wire input port (RX input); 300K Ω input impedance. This signal is referred to AGND. If connected to single supply CODEC output it must be DC decoupled with proper capacitor. 19 CAC AC feedback input, AC/DC split capacitor (CAC). 32 ILTF Transversal line current image output. 41 TIP 2 wire port; TIP wire (Ia is the current sourced from this pin). 37 RING 2 wire port; RING wire (Ib is the current sunk into this pin). 28 RLIM Constant current feed programming pin (via RLIM). RLIM should be connected close to this pin and PCB layout should avoid noise injection on this pin. 30 RTH Off-hook threshold programming pin (via RTH). RTH should be connected close to this pin and PCB layout should avoid noise injection on this pin. 29 IREF Internal bias current setting pin. RREF should be connected close to this pin and PCB layout should avoid noise injection on this pin. 43 CREV Reverse polarity transition time control. One proper capacitor connected between this pin and AGND is setting the reverse polarity transition time. This is the same transition time used to shape the ”trapezoidal ringing” during ringing injection. 31 RD DC feedback and ring trip input. RD should be connected close to this pin and PCB layout should avoid noise injection on this pin. OPERATING RANGE Symbol Parameter Value Unit Vpos Positive Supply Voltage 5.5 to +15.8 V A/BGND AGND to BGND -100 to +100 V Vdig Pin D0, D1, D2, DET, CKTTX, PD -0.25 to 5.25 V Top Ambient Operating Temperature Range -40 to +85 °C Vbat (1) Self Generated Battery Voltage -74 max. V (1) Vbat is self generated by the on chip DC/DC converter and can be programmed via RF1 and RF2. RF1 and RF2 shall be selected in order to fulfil the a.m limits (see External Components Table page 10) STLC3055 3/22 |
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