TA0313 Datasheet, PDF (2/9 Pages) STMicroelectronics – STMicroelectronics Solutions for ADSL Line Interfaces

TA0313
STMicroelectronics Solutions for ADSL Line Interfaces
The line interface - ADSL remote terminal (RT)
Figure 2 shows a typical analog line interface used for ADSL. The upstream and downstream signals are
separated from the telephone line by using an hybrid circuit and a line transformer. On this note,
emphasis will be placed on the emission path.
Figure 2: Typical ADSL Line Interface
TX
TS613
TS612
DMT
AFE
RX
12.5Ω
12.5Ω
TRANSMISSION
25Ω
HYBRID
POTS
SPLITTER
line
RECEPTION
The emission path
The features of the TS613 and TS612 drivers are shown in Table 1 below.
Table 1: Features of drivers
GBP
BW
Gain=4
SR
Iout typ.
Noise
Icc per
op.
HD2/HD3¹
(MHz) _MHz) (V/µs) (mA) (nV/√Hz) _(mA)
(dBc)
TS613 VFA 130
34
40
320
3
11
74/79
TS612 VFA 130
34
40
320
3
14
74/79
1) Single ended 4Vpp/100kHz on 25Ω//15pF
Vout
diff.
(Vpp
min)
18
18
Packages
SO8
SO8 Exposed Pad
SO20 Batwing
In order to shrink the line interface size, the TS613 comes in the classic SO8 plastic package as well as
the SO8 ExposedPAD plastic package, capable of dissipating 1.7W at room temperature. While this
circuit does not feature a power-down function, it does have the advantage of featuring a standard pin-
out.
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