DAT-31575-SN+
DAT-31575-SN
Digital Step Attenuator
The DAT-31575-SN, uses a common 6-bit serial word format, as shown in Table 3: 6-Bit attenuator Serial
Programming Register Map.
The first bit, the MSB, corresponds to the 16 dB Step and the last bit, the LSB, corresponds to the 0.5 dB step.
Table 3. 6-Bit attenuator Serial Programming Register Map
B5
B4
C8
B3
C4
B2
C2
B1
C1
B0
C16
C0.5
MSB
(first in)
LSB
(last in)
Power-up Control Settings
The DAT-31575-SN always assumes a specifiable attenuation setting on power-up, allowing a known at-
tenuation state to be established before an initial serial control word is provided.
When the attenuator powers up, the six control bits are set to whatever data is present on the six data inputs
(C0.5 to C16).
This allows any one of the 64 attenuation settings to be specified as the power-up state.
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