SI3018-F-GSR Silicon Laboratories Inc, SI3018-F-GSR Datasheet - Page 80

• Manufacturer Part Number: SI3018-F-GSR
• Manufacturer: Silicon Laboratories Inc

Specifications of SI3018-F-GSR

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Register 30. AC Termination Control
Reset settings = 0000_0000
Bit
7:6
3:0
5
4
Name
Type
Bit
ACIM[3:0] AC Impedance Selection.
Reserved Read returns zero.
Reserved This bit may be written to a zero or one.
FULL2
Name
D7
Enhanced Full Scale (2x) Transmit and Receive Mode.
0 = Default
1 = Transmit/Receive 2x Full Scale
This bit changes the full scale of the ADC and DAC from 0 min to +6 dBm into 600  load (or
1.5 dBV into all reference impedances). When this bit is set, the DCV[1:0] bits (Register 26)
should be set to all 1s to avoid distortion at low loop currents.
The off-hook ac termination is selected from the following:
0000 = 600 
0001 = 900 
0010 = 270  + (750  || 150 nF) and 275  + (780  || 150 nF)
0011 = 220  + (820  || 120 nF) and 220  + (820  || 115 nF)
0100 = 370  + (620  || 310 nF)
0101 = 320  + (1050  || 230 nF)
0110 = 370  + (820  || 110 nF)
0111 = 275  + (780  || 115 nF)
1000= 120  + (820  || 110 nF)
1001 = 350  + (1000  || 210 nF)
1010 = 200  + (680  || 100 nF)
1011 = 600  + 2.16 µF
1100 = 900  + 1 µF
1101 = 900  + 2.16 µF
1110 = 600  + 1 µF
1111 = Global impedance
D6
D5
Rev. 1.31
FULL2
R/W
D4
Function
D3
Si3050 + Si3018/19
D2
ACIM[3:0]
R/W
D1
D0
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