Rainbow Electronics MAX1400 - Manual (Page 24)

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