Datasheet

LMH6518
www.ti.com SNOSB21C –MAY 2008–REVISED JULY 2013
Table 4. Data Field
Filter Pre-amp Ladder Attenuation
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
(MSB) (LSB)
X 0 0 0 0 0=Full Power 0 See Table 6 0 0=LG See Table 7
1=Aux Hi-Z 1=HG
NOTE
Bits D5, D9, D11-D14 must be “0”. Otherwise, device operation is undefined and
specifications are not ensured.
Table 5. Default Power-On Reset Condition
Filter Pre-amp Ladder Attenuation
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
(MSB) (LSB)
0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0
Table 6. Filer Selection Data Field
Filter Filter BW
D8 D7 D6 (MHz)
0 0 0 Full
0 0 1 20
0 1 0 100
0 1 1 200
1 0 0 350
1 0 1 650
1 1 0 750
1 1 1 Unallowed
NOTE
All filters are low pass single pole roll-off and operate on both Main and Auxiliary outputs.
These filters are intended as signal path bandwidth and/ or noise limiting.
Table 7. Ladder Attenuation Data Field
Ladder Attenuation Ladder Attenuation (dB)
D3 D2 D1 D0
0 0 0 0 0
0 0 0 1 −2
0 0 1 0 −4
0 0 1 1 −6
0 1 0 0 −8
0 1 0 1 −10
0 1 1 0 −12
0 1 1 1 −14
1 0 0 0 −16
1 0 0 1 −18
1 0 1 0 −20
1 0 1 1 Unallowed
1 1 0 0 Unallowed
1 1 0 1 Unallowed
1 1 1 0 Unallowed
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