MAX1400_02 Datasheet, PDF (24/34 Pages) Maxim Integrated Products – +5V, 18-Bit, Low-Power, Multichannel, Oversampling (Sigma-Delta) ADC

+5V, 18-Bit, Low-Power, Multichannel,
Oversampling (Sigma-Delta) ADC
Table 15. Modulator Operating Frequency, Sampling Frequency, and 16-Bit Data
Output Rates
MCLK
FREQ.
X2CLK = 0
DEFAULT
f_CLKIN
(MHz)
MCLK
FREQ.
X2CLK = 1
f_CLKIN
(MHz)
1.024
2.048
1.024
2.048
1.024
2.048
1.024
2.048
2.4576
4.9152
2.4576
4.9152
2.4576
4.9152
2.4576
4.9152
Default condition is in bold print.
CLK
MF1
MF0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
AIN/REFIN
SAMPLING
FREQ.
f_S
(kHz)
16
32
64
128
38.4
76.8
153.6
307.2
MOD.
FREQ.
f_M
(kHz)
8
16
32
64
19.2
38.4
76.8
153.6
AVAILABLE
OUTPUT
DATA RATES
AT 16-BIT
ACCURACY
(sps)
20, 25
40, 50
80, 100
160, 200
50, 60
100, 120
200, 240
400, 480
Table 16a. MAX1400 Noise vs. Gain and Output Data Rate—Unbuffered Mode,
V_REF = 2.5V, f_CLKIN = 2.4576MHz
OUTPUT
DATA
RATE
(sps)
50
60
300
600
-3dB
FREQ.
(Hz)
13.1
15.7
78.6
157.2
x1
6.20
7.23
147.60
844.82
x2
3.27
3.94
70.73
417.07
TYPICAL OUTPUT NOISE IN µV_RMS
PROGRAMMABLE GAIN
x4
2.02
2.21
35.10
216.88
x8
1.25
1.36
17.91
107.06
x16
1.13
1.20
9.57
50.91
x32
1.10
1.12
5.05
26.25
100
120
600
1200
26.2
31.4
157.2
314.4
6.98
7.91
138.79
836.32
3.61
3.93
73.86
405.49
1.94
2.14
37.69
203.35
1.24
1.36
19.19
99.75
1.10
1.17
9.34
52.38
1.04
1.08
5.15
24.50
200
240
1200
2400
52.4
62.9
314.4
628.8
6.25
7.00
141.69
816.66
4.00
4.16
71.25
399.44
1.96
2.04
35.91
200.51
1.26
1.34
18.11
103.04
1.07
1.15
9.45
51.17
1.02
1.14
5.20
26.57
400
480
2400
4800
104.8
125.7
628.8
1258
6.87
8.15
150.09
820.73
3.50
3.84
69.17
419.17
2.06
2.36
36.54
203.74
1.31
1.44
18.92
103.78
1.16
1.28
9.67
51.42
1.09
1.23
5.14
26.47
x64
1.05
1.10
3.54
13.26
0.98
1.08
3.29
13.40
0.98
1.09
3.38
13.88
1.13
1.22
3.61
13.96
x128
0.99
1.10
2.75
7.43
1.00
1.10
2.76
7.31
1.01
1.09
2.79
7.38
1.08
1.21
3.12
7.68
BIT
STATUS
MF1:MF0 = 0
FS1:FS0 = 0
FS1:FS0 = 1
FS1:FS0 = 2
FS1:FS0 = 3
MF1:MF0 = 1
FS1:FS0 = 0
FS1:FS0 = 1
FS1:FS0 = 2
FS1:FS0 = 3
MF1:MF0 = 2
FS1:FS0 = 0
FS1:FS0 = 1
FS1:FS0 = 2
FS1:FS0 = 3
MF1:MF0 = 3
FS1:FS0 = 0
FS1:FS0 = 1
FS1:FS0 = 2
FS1:FS0 = 3
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