參數(shù)資料
型號： MAX2079CXE+T
廠商： Maxim Integrated Products
文件頁數(shù)： 24/49頁
文件大?。?/td> 0K
描述： IC OCT ULTRASOUND RCVR 144CTBGA
標準包裝： 1,000
系列： *
Low-Power, High-Performance, Fully Integrated
Octal Ultrasound Receiver (Octal LNA, VGA,
AAF, ADC, and CWD Beamformer)
MAX2079
30
Maxim Integrated
The digital HPF provides a small-signal gain that depends
on the filter coefficient. This effectively reduces slightly
the full-scale input range of the ADC. A plot of filter gain
vs. filter coefficient is shown in Figure 16. A coarse digital
multiplier is incorporated at the output of the filter to pro-
vide partial compensation of the digital filter gain.
Table 2 provides the recommended gain-compensation
settings for different filter cutoff-frequency settings.
Figure 16. Digital HPF Gain vs. Filter Coefficient
Table 2. Gain-Compensation Settings for Different Filter Cutoff-Frequency Settings
*Parts are factory trimmed with this setting. Programming can be changed.
R
FILTeR MODe
POLeS
f3dB (fS/2)
GAIN
GAIN (dB)
GAIN COMP (dB)
OVeRALL GAIN (dB)
N/A
Bypass
N/A
1
0
63/64
Filter
1
0.004935
1
0.0681
0
0.0681
62/64
Filter
1
0.009796
1
0.1368
0
0.1368
61/64
Filter
1
0.014584
1
0.206
0
0.206
60/64
Filter
1
0.019303
1
0.2758
0
0.2758
59/64
Filter
1
0.023956
1
0.3461
0
0.3461
58/64
Filter
1
0.028544
15/16
0.417
-0.5606
-0.1436
57/64
Filter
1
0.033069
15/16
0.4885
-0.5606
-0.0721
56/64
Filter
1
0.037535
15/16
0.5606
-0.5606
0
55/64
Filter
1
0.041943
15/16
0.6333
-0.5606
0.0727
54/64
Filter
1
0.046294
15/16
0.7066
-0.5606
0.146
63/64
Filter
2
0.007403
1
0.1362
0
0.1362
62/64
Filter
2
0.014694
1
0.2736
0
0.2736
61/64
Filter
2
0.021876
15/16
0.412
-0.5606
-0.1486
60/64*
Filter
2
0.028955
15/16
0.5515
-0.5606
-0.0091
59/64
Filter
2
0.035934
15/16
0.6922
-0.5606
0.1316
58/64
Filter
2
0.042816
15/16
0.834
-0.5606
0.2734
57/64
Filter
2
0.049604
7/8
0.977
-1.1598
-0.1828
56/64
Filter
2
0.056303
7/8
1.1211
-1.1598
-0.0387
55/64
Filter
2
0.062915
7/8
1.2665
-1.1598
0.1067
54/64
Filter
2
0.069441
7/8
1.4131
-1.1598
0.2533
DIGITAL HPF GAIN vs. FILTER COEFFICIENT
FILTER COEFFICIENT (/64)
GAIN
(dB)
62
60
58
56
54
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0
52
64
+
2-STAGE IIR
1-STAGE IIR
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