E-STLC3085 데이터 시트보기 (PDF) - STMicroelectronics

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E-STLC3085

Integrated Pots Interface for Home Access Gateway and WLL

STMicroelectronics 

STLC3085

Block diagram and pin description

Table 1.

N°

26

27

28

29

30

31

32

33

34

35

36

37

41

43

44

Pin description (continued)

Pin

Function

VPOS Positive supply input.

CVCC Internal positive voltage supply filter.

AGND

RLIM

Analog Ground, must be shorted with BGND.

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

this pin and AGND pin to avoid noise injection.

IREF

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

pin to avoid noise injection.

RTH

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

pin and AGND pin to avoid noise injection.

RD

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

to avoid noise injection.

ILTF

Transversal line current image output.

CSVR Battery supply filter capacitor.

BGND Battery Ground, must be shorted with AGND.

VBAT

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

Must be shorted to VBAT1.

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

TIP

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

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.

VBAT1 Frame connection. Must be shorted to VBAT.

1.4 Thermal data

Table 2. Thermal data

Symbol

Parameter

Rth j-amb Thermal Resistance Junction to Ambient

Typ.

Value

60

Unit

°C/W

5/28

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