PBL 386 21/2
DC characteristics
A
B
C
D
E
VTR [V]
A:
B:
C:
IL(@VTR=0V)=ILProg
Constant current
D:
E:
RFeed=2·25 Ω
VTROpen=|VBat|-VOH
103
RLC
I
LConst(typ) = ILProg
=
- 4·10-3
VTR=|VBat|-VOH-50·ILProg
Figure 12. Battery feed characteristics (without the protection resistors on the line).
VTX
PBL386 21/2
CODEC
DC-GND
RT
I
IRT
IRSN
IRRX
RRX
_
+
RSN
IRR
+1.25 V
UREFcodec
RR
Figure 13. CODEC receive interface.
15