stlc3040 STMicroelectronics, stlc3040 Datasheet - Page 36

• Manufacturer Part Number: stlc3040
• Description: Subscriber Line Interface Codec Filter, Cofislic
• Manufacturer: STMicroelectronics

STLC3040
AC ELECTRICAL CHARACTERISTICS OF ANALOG PINS (continued)
ABSOLUTE GAIN Rx/Tx (law A)
B[1..8] = 0
Z[1..3] = 0
Reference frequency = 1kHz
Figure 13.
36/49
THD
Symbol
THD
V
2WRNG
V
R
X
TTX
RNG
TTX
CR[ 1] = 00
CR[ 2] = 00
CR[ 3] = 00
CR[ 4] = F9
CR[ 5] = 60
CR[ 6] = 50
K = 1000h
GR = FFh
GX = FFh
| 1000h
| 0h
| 0h
| 0h
| 1000h
| 0h
| 0h
| 0h
Ring amplitude at 2-wire output
V
Total harmonic distortion in
Ring mode
2-wire amplitude at V
26) during teletax emission
Total harmonic distortion during
teletax emission
OUT
(pin 26)
Parameter
(4096) |
(0)
(0)
(0)
(4096) |
(0)
(0)
(0)
V
V
RAC
2W
OUT
CR[ 7] = 1C
CR[10] = 00
CR[11] = 10
CR[12] = 03
CR[ 9] = 2F
CR[ 8] = 08
|
|
|
|
|
|
(4096)
(255)
(255)
(pin
1620
V
RAC
OUT
see test cond. 6
see test cond. 6
see test cond. 7
see test cond. 7
16
26
Test Condition
Example if DD Vpcm = 0dBm0 target Vout =
45.5mVrms (0dBm0/COFISLIC)
absolute gain = 20 log (Vout / target Vout)
Example if target DU = 0dBm0 then VRac_ref =
32.3mVrms (A_law)
absolute gain = dBm0 level on DU (full scale
3.14dBm0 A_law)
target Vout represents the rms level to be measured
at Vout starting from a DD Vpcm (dBm0) code with a
certain set of coefficient.
target Vout = (mVrms) = (2 1.514 2) [10^ ((Vpcm -
3.14)/20)]/16 (0.98 (R[1]/8192) (GR/256)/(2 sqr (2)))
target DU represents the dBm0 level expected on DU
with a certain set of coefficient and a Vrac of
41.4Vrms
VRac_ref is the amplitude of the sine wave (1kHz) to
be applied on RAC (pin 16) in order to expect on DU
a Vpcm dBm0 level with the same set of coefficient.
target DU (dBm0) = 3.14 + 20 Log((0.0414 3 (2
sqr(2)) / 1.514) 16 (K/8192) (X[1]/8192) (GX/256)
VRac_ref = (41.4mV 10^ ((Vpcm - target DU)/20)
0.966)
6
5
DU
DD
D96TL256A
0dBm0
0dBm0
-5%
Min.
-5%
2W
2W
Typ.
RNG
TTX
Max.
+5%
+5%
2%
2%
Vrms
Vrms
Unit