ISL5416_14 Datasheet, PDF (66/71 Pages) Intersil Corporation – Four-Channel Wideband Programmable

ISL5416
INPUT
DC OFFSET
MAGNITUDE
IMMEDIATE
THRESHOLD
ACCUMULATOR
SHIFT:
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
SHIFTER OUTPUT
THRESHOLD 1,
THRESHOLD 2
dB VALUE
GAIN
ACCUMULATOR
uP DELTA
PROGRAMMED
DELTA3 (LOWER)
DELTA 2 (UPPER)
DELTA 1 (IMMED.)
uP LOAD BITS
LEAK
LIMITS
TO MAPPING LUT
TABLE 85. ISL5416 RANGE CONTROL BIT WEIGHTING
G F E D C B A 9 8 7 6 5 4 3 2 1 0. 1 2 3 4 5 6 7 8 9 A B C D E F
SXXXXXXXXXXXXXXX
SXXXXXXXXXXXXXXX
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
0XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
X X X X X X X X X X X X X X X X_→
0 X X X X X X X X X X X X X X X_→
XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXX
24 12 6
0XXXXXXXXXXXXXXXX
XXXXXXXXXXXXXX
(14 bits)
Max Delta = 12 dB
1 1 1XXXXXXXXXXXXXX
0 0 0XXXXXXXXXXXXXX
0 0 0XXXXXXXXXXXXXX
0XXXXXXXXXXXXXXXX
SSXXXXXXXXXXXXXXX
MSB is sign extended
0XXX
XXX
(accumulator + DELTA 1)
(accumulator + DELTA 2)
(accumulator + DELTA 3)
(accumulator + leak)
AGC BIT
WEIGHTS
FORWARD
GAIN PATH
INPUTS I/Q
TABLE 86. AGC BIT WEIGHTS
F E D C B A 9 8 7 6 5 4 3 2 1 0. 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9
S. 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3
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