STLC3085

Block diagram and pin description

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1.4

Thermal data

Table 2.

Thermal data

26

VPOS

Positive supply input.

27

CVCC

Internal positive voltage supply filter.

28

AGND

Analog Ground, must be shorted with BGND.

29

RLIM

Constant current feed programming pin (via RLIM). RLIM should be connected close to

this pin and AGND pin to avoid noise injection.

30

IREF

Internal bias current setting pin. RREF should be connected close to this pin and AGND

pin to avoid noise injection.

31

RTH

Off-hook threshold programming pin (via RTH). RTH should be connected close to this

pin and AGND pin to avoid noise injection.

32

RD

DC feedback and ring trip input. RD should be connected close to this pin and AGND pin

to avoid noise injection.

33

ILTF

Transversal line current image output.

34

CSVR

Battery supply filter capacitor.

35

BGND

Battery Ground, must be shorted with AGND.

36

VBAT

Regulated battery voltage self generated by the device via DC/DC converter.

Must be shorted to VBAT1.

37

RING

2 wire port; RING wire (Ib is the current sunk into this pin).

41

TIP

2 wire port; TIP wire (Ia is the current sourced from this pin).

43

CREV

Reverse polarity transition time control. A 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.

44

VBAT1

Frame connection. Must be shorted to VBAT.

Symbol

Parameter

Value

Unit

Thermal Resistance Junction to Ambient

Typ.

60

°C/W

Table 1.

Pin description (continued)

N°

Pin

Function