25v, f, 4576mhz, Clkin – Rainbow Electronics MAX1401 User Manual
Page 27
MAX1401
+3V, 18-Bit, Low-Power, Multichannel,
Oversampling (Sigma-Delta) ADC
______________________________________________________________________________________
27
Table 16b. Noise vs. Gain and Output Data Rate—Buffered Mode, V
REF
= 1.25V,
f
CLKIN
= 2.4576MHz
10
12
11
14
13
16
15
17
19
18
20
1
4
8
2
16
32
64
128
GAIN (V/V)
EFFECTIVE RESOLUTION (BITS)
10
12
11
14
13
16
15
17
19
18
20
1
4
8
2
16
32
64
128
256
256
GAIN (V/V)
EFFECTIVE RESOLUTION (BITS)
CLK = 1
FS1: FS0 = 0 or 1
FS1: FS0 = 2
FS1: FS0 = 3
CLK = 1
FS1: FS0 = 0 or 1
FS1: FS0 = 2
FS1: FS0 = 3
a) BUFF = 0
b) BUFF = 1
Figure 7. Effective Resolution vs. Gain and Notch Frequency
-3dB
FREQ.
(Hz)
50
13.1
5.72
3.21
OUTPUT
DATA
RATE
(sps)
2.10
1.41
1.42
1.44
1.38
TYPICAL OUTPUT NOISE (µV
RMS
)
FOR VARIOUS PROGRAMMABLE GAINS
1.34
BIT
STATUS
FS1:FS0 = 0
60
15.7
6.29
3.57
2.30
1.55
1.61
1.56
1.49
1.56
FS1:FS0 = 1
300
78.6
80.6
39.8
19.3
10.2
6.14
4.25
3.03
3.52
FS1:FS0 = 2
600
157.2
436
225
116
57.1
28.8
15.0
8.70
5.99
FS1:FS0 = 3
MF1:MF0 = 1
100
26.2
5.82
3.35
2.08
1.43
1.37
1.36
1.35
1.31
FS1:FS0 = 0
MF1:MF0 = 3
400
104.8
5.60
3.10
1.85
1.32
1.24
1.25
1.19
1.21
FS1:FS0 = 0
480
125.7
6.18
3.47
2.02
1.38
1.37
1.29
1.33
1.33
FS1:FS0 = 1
2400
628.8
76.3
39.3
20.8
9.83
5.92
3.92
3.92
3.07
FS1:FS0 = 2
120
31.4
6.01
3.65
2.27
1.51
1.51
1.50
1.50
1.47
FS1:FS0 = 1
600
157.2
77.7
40.1
20.2
10.6
5.93
4.19
3.54
3.23
FS1:FS0 = 2
1200
314.4
434
222
111
57.0
28.3
14.8
8.37
5.81
FS1:FS0 = 3
MF1:MF0 = 2
200
52.4
5.82
3.07
1.87
1.26
1.20
1.18
1.15
1.17
FS1:FS0 = 0
240
62.9
6.17
3.54
2.09
1.45
1.30
1.27
1.31
1.29
FS1:FS0 = 1
1200
314.4
79.0
41.1
19.8
10.5
5.68
3.68
3.14
2.99
FS1:FS0 = 2
2400
628.8
439
226
111
57.9
28.7
15.4
8.26
5.32
FS1:FS0 = 3
4800
1258
455
225
114
57.1
29.9
14.5
8.13
5.55
FS1:FS0 = 3
MF1:MF0 = 0
x128
x64
x32
x16
x8
x4
x2
x1