STLC5048TR STMicroelectronics, STLC5048TR Datasheet - Page 59

• Manufacturer Part Number: STLC5048TR
• Description: IC CODEC/FILTER PROGR 4CH 64TQFP
• Manufacturer: STMicroelectronics
• Type: PCM Codec/Filterr

Specifications of STLC5048TR

• Data Interface: PCM Audio Interface
• Resolution (bits): 16 b
• Number Of Adcs / Dacs: 4 / 4
• Sigma Delta: Yes
• Voltage - Supply, Analog: 3.3 V ~ 5 V
• Voltage - Supply, Digital: 3.3 V ~ 5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-TQFP, 64-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

STLC5048
Considering the TX gain we can proceed as follows for the gain calculation:
●
●
For instance let's calculate which TX gain to program if +4.2 dBr @ 600 ohm is to be set:
VLINE = 0 dBm @ 600 ohm
In case of STLC3080 the scaling factor is 100 (instead of 50) while the Rs value is 8200
(instead of 4100) so the result is the same:
Referring to the first formula, to have DX equal to 4.2 dB with VLINE=0 dBm, GX must be
set to GX = 4.2 - 4.78 = -0.58 dB.
Figure 13. Absolute gain in TX path
TXG = 0 dB
GX = 0 dB
(As reported in the absolute gain levels with 61 Vrms at VFXI and GX=0 dB, the DX
output is 0 dBm0).
DX
VFXI = (-Iline/50)*4100 for L3235N
VFXI = (-Iline/100)*8200 for STLC3080
GX
STLC5048
TXG
VFXI
VFXI
=
=
VFXI
VLINE
------------------
VLINE
------------------
600
600
STLC3080)
Absolute gains in kit with L3235N/STLC3080
(8200 for
4100Ω
R
⋅
⋅
S
--------- -
100
----- -
50
1
1
⋅
⋅
4100
8200
L3235N
1/50
D00TL474
Iline
VLINE
Zadm
STLC3080
1/100 for
59/64