TEA1064A/C1 Philips Semiconductors (Acquired by NXP), TEA1064A/C1 Datasheet - Page 9

• Manufacturer Part Number: TEA1064A/C1
• Description: TEA1064A; Low Voltage Versatile Telephone Transmission Circuit With Dialler Interface And Transmit Level Dynamic Limiting
• Manufacturer: Philips Semiconductors (Acquired by NXP)

Philips Semiconductors
Stabilized peripheral supply voltage
The configuration shown in Fig.8 provides a stabilized
voltage across pins V
(such as dialling and control circuits); the DC voltage
V
The V
C15. For stable loop operation, resistor R16 ( 50 ) is
connected between V
The voltage regulator control loop is completed by resistor
R15 between LN and V
For sets with an impedance of 600 , practical values are:
R15 = 200 to 600 ; C15 = 220 F; C3 = 470 nF. The
ratio R15/R16
sufficient phase margin, and R15/R16
satisfactory set impedance in the audio frequency range.
For sets with complex impedance, the value of C3 and the
ratio R15/R16 are different (further information is given in
the TEA1064A Application Report
The peripheral supply capability depends mainly on the
available line current, the required AC output swing on the
line, the maximum permitted DC voltage on the line and
March 1994
handbook, full pagewidth
LN
Low voltage versatile telephone transmission circuit
with dialler interface and transmit level dynamic limiting
now varies with the peripheral supply current.
CC2-SLPE
Fig.8 Application with stabilized supply voltage for peripheral circuits: R15 = 392 ; R16 = 56 .
supply must be decoupled by capacitor
8 is for stable loop operation with
V exch
R exch
CC2
CC2
CC2
and SLPE for peripheral circuits
and SLPE in series with C15.
.
R line
TEA1064A
(1)
).
17
DC
AC
REG
C3
I line
6 is for
10
STAB
R5
I SLPE
1
SLPE
LN
20
R9
R15
R1
I CC1
9
the values of external components (especially R15). With
R15 = 392
maximum possible AC output swing on the line as a
function of line current is as shown in Fig.9, the curve
parameter is the peripheral supply current (I
values for R15 (from 200 to 600 ) maintaining
6
in the TEA1064A Application Report
(1) Supplied on request.
16
V EE
V CC1
11
0.25 mA
I p
R15/R16
0.25 mA
19 V CC2
and R16 = 56
8 give different results (these are described
C1
R16
C15
MGR063
peripheral
(basic application) the
circuits
I p
Product specification
(1)
TEA1064A
.
V p
p
). Different