Datasheet

MAX1403
+3V, 18-Bit, Low-Power, Multichannel,
Oversampling (Sigma-Delta) ADC
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10
12
11
14
13
16
15
17
19
18
20
1482 163264128
GAIN (V/V)b) BUFF = 1a) BUFF = 0
EFFECTIVE RESOLUTION (BITS)
10
12
11
14
13
16
15
17
19
18
20
1482 163264128
256 256
GAIN (V/V)
EFFECTIVE RESOLUTION (BITS)
FS1: FS0 = 0 OR 1
FS1: FS0 = 2
FS1: FS0 = 3
CLK = 1
FS1: FS0 = 0 OR 1
FS1: FS0 = 2
FS1: FS0 = 3
CLK = 1
BUFF = 1
CLK = 1
BUFF = 0
Figure 7. Effective Resolution vs. Gain and Notch Frequency
Table 16b. Noise vs. Gain and Output Data Rate—Buffered Mode, V
REF
= 1.25V,
f
CLKIN
= 2.4576MHz
-3dB
FREQ.
(Hz)
TYPICAL OUTPUT NOISE (µV
RMS
)
FOR VARIOUS PROGRAMMABLE GAINS
OUTPUT
DATA
RATE
(sps)
x1 x2 x4 x8 x16 x32 x64 x128 MF1:MF0 = 0
50 13.1 5.72 3.21 2.10 1.41 1.42 1.44 1.38 1.34 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
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
BIT
STATUS
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
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
4800 1258 455 225 114 57.1 29.9 14.5 8.13 5.55 FS1:FS0 = 3