MAX1400 Maxim, MAX1400 Datasheet - Page 25

• Manufacturer Part Number: MAX1400
• Description: %V / 18-Bit / Low-Power / Multichannel / Oversampling Sigma-Delta ADC
• Manufacturer: Maxim

Table 16b. MAX1400 Noise vs. Gain and Output Data Rate—Buffered Mode,
V
Figure 7. Effective Resolution vs. Gain and Notch Frequency
OUTPUT
REF
DATA
RATE
1200
1200
2400
2400
4800
(Hz)
300
600
100
120
600
200
240
400
480
50
60
= 2.5V, f
a) BUFF = 0
20
19
18
17
16
15
14
13
12
11
10
FREQ.
157.2
157.2
314.4
314.4
628.8
104.8
125.7
628.8
-3dB
1258
13.1
15.7
78.6
26.2
31.4
52.4
62.9
(Hz)
1
2
FS1: FS0 = 3
______________________________________________________________________________________
CLKIN
FS1: FS0 = 2
4
142.02
823.33
143.45
830.30
148.57
851.32
144.96
803.87
6.05
7.11
8.10
8.37
6.55
7.40
6.60
7.58
x1
+5V, 18-Bit, Low-Power, Multichannel,
8
GAIN (V/V)
= 2.4576MHz
16
FS1: FS0 = 0 or 1
405.95
408.48
408.09
394.00
32
71.62
69.52
73.71
68.92
4.13
4.24
3.66
4.12
3.21
3.89
3.83
4.14
x2
Oversampling (Sigma-Delta) ADC
64
CLK = 1
BUFF = 0
128
195.95
201.87
202.57
205.60
35.65
36.04
36.80
35.92
2.35
2.54
2.25
2.53
1.92
2.24
2.21
2.28
TYPICAL OUTPUT NOISE IN µV
x4
PROGRAMMABLE GAIN
102.14
101.39
105.18
102.18
18.32
17.77
18.08
17.36
1.50
1.64
1.52
1.64
1.35
1.47
1.38
1.58
x8
50.28
52.39
52.98
52.48
1.40
1.49
9.35
1.34
1.45
9.32
1.24
1.35
9.92
1.28
1.40
9.52
x16
b) BUFF = 1
25.85
26.77
25.71
26.07
RMS
1.32
1.53
5.60
1.31
1.49
5.48
1.16
1.29
5.26
1.21
1.34
5.45
x32
20
19
18
17
16
15
14
13
12
11
10
1
2
FS1: FS0 = 2
FS1: FS0 = 3
13.75
13.50
13.33
13.59
1.37
1.49
4.10
1.34
1.45
3.92
1.16
1.22
3.64
1.17
1.30
3.79
x64
4
8
GAIN (V/V)
16
x128
1.39
1.48
3.52
7.78
1.35
1.46
3.41
7.87
1.10
1.25
3.02
7.97
1.21
1.31
3.21
7.89
FS1: FS0 = 0 or 1
32
64
CLK = 1
BUFF = 1
128
MF1:MF0 = 0
MF1:MF0 = 1
MF1:MF0 = 2
MF1:MF0 = 3
FS1:FS0 = 0
FS1:FS0 = 1
FS1:FS0 = 2
FS1:FS0 = 3
FS1:FS0 = 0
FS1:FS0 = 1
FS1:FS0 = 2
FS1:FS0 = 3
FS1:FS0 = 0
FS1:FS0 = 1
FS1:FS0 = 2
FS1:FS0 = 3
FS1:FS0 = 0
FS1:FS0 = 1
FS1:FS0 = 2
FS1:FS0 = 3
STATUS
BIT
25