PE43704
Product Specification
Table 8. Parallel Truth Table
Table 9. Serial Attenuation Word Truth Table
Attenuation Word
Attenuation
Parallel Control Setting
Attenuation
Setting
RF1-RF2
Setting
D0
D6
D6
D7
D5
D4
D3
D2
D1
D5
D4
D3
D2
D1
D0
RF1-RF2
(LSB)
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
H
L
L
L
L
L
L
H
L
H
L
L
L
L
L
H
L
L
H
L
L
L
L
H
L
L
L
H
L
L
L
H
L
L
L
L
H
L
L
H
L
L
L
L
L
H
L
H
L
L
L
L
L
L
H
Reference I.L.
0.25 dB
0.5 dB
1 dB
L
L
L
L
L
L
L
H
H
L
L
L
L
L
L
H
L
H
L
L
L
L
L
H
L
L
H
L
L
L
L
H
L
L
L
H
L
L
L
H
L
L
L
L
H
L
L
H
L
L
L
L
L
H
L
H
L
L
L
L
L
L
H
Reference I.L.
0.25 dB
0.5 dB
1 dB
2 dB
2 dB
4 dB
4 dB
8 dB
8 dB
16 dB
16 dB
31.75 dB
31.75 dB
Table 10. Serial Address Word Truth Table
Address Word
Address
A7
(MSB)
Setting
A6
A5
A4
A3
A2
A1
A0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
L
L
L
L
L
H
L
000
001
010
011
100
101
110
111
L
H
H
L
L
H
L
H
H
H
H
L
H
L
H
H
H
Table 11. Serial-Addressable Register Map
Bits can either be set to logic high or logic low
MSB (last in)
LSB (first in)
D7 must be set to logic low
Q15
Q14
A6
Q13
Q12
Q11
Q10
Q9
Q8
Q7
Q6
Q5
Q4
D4
Q3
Q2
D2
Q1
D1
Q0
A7
A5
A4
A3
A2
A1
A0
D7
D6
D5
D3
D0
Address Word
Attenuation Word
Attenuation Word is derived directly from the attenuation value. For example, to program the 18.25 dB state
at address 3:
Address word: XXXXX011
Attenuation Word: Multiply by 4 and convert to binary → 4 * 18.25 dB → 73 → 01001001
Serial Input: XXXXX01101001001
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Document No. DOC-16514-6 |
UltraCMOS® RFIC Solutions
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