ISL5416 Datasheet, PDF (10/71 Pages) Intersil Corporation – Four-Channel Wideband Programmable DownConverter

SYNC
ISL5416
ENABLE COUNTERS
FROM INPUT SECTION
MANTISSA EXPONENT
INTERVAL
(SLOT
PERIOD)
LD
=0
DOWN
COUNTER
DELAY
(SYNC TO
START OF
INTEGRATION)
EN
LD
≥0
DOWN
COUNTER =0
INTEGRATION
TIME
EN
LD
<0
DOWN
COUNTER =0
INTEGRATIONS
PER SLOT - 1
EN
LD
≥0
DOWN
COUNTER
ENABLE
UPDATES
PRLD(7:0)
LD
DOWN
COUNTER
µP ENABLE
|X|
BYPASS
BW SELECT
HPF
EN
INPUT
EXP
|X|
REG
Σ
Σ
DUMP
REG
2^{(-1 TO -16)}
BARREL
SHIFT
TH1
B
A
∆
TH2
B
A
∆
TH3
B
A
∆
A>B
IMMEDIATE
A>B
UPPER
A<B
LOWER
EN
ATTEN
EXP
1-256
CLOCKS
PROG
DELAY
REG
DECODE
“0”
BIAS
DELTA1
DELTA2
Σ
R
E
DELTA3
G
16 R
EOUT
E
G
MAP
8
8 _FROM
8 OTHER
8 ^DETECT.
UPPER GAIN LIMIT
LOWER GAIN LIMIT
LIMIT
DETECTOR
3
LUT
8
FIGURE 2. RANGE CONTROL BLOCK DIAGRAM
LUT = LOOK UP TABLE
10