Rainbow-electronics MAX1401 Bedienungsanleitung PDF herunterladen (Seite 26)

MAX1401

+3V, 18-Bit, Low-Power, Multichannel,

Oversampling (Sigma-Delta) ADC

26 ______________________________________________________________________________________

Table 15. Modulator Operating Frequency, Sampling Frequency, and 16-Bit Data

Output Rates

Table 16a. Noise vs. Gain and Output Data Rate—Unbuffered Mode, V

REF

= 1.25V,

CLKIN

= 2.4576MHz

Note: Default condition is in bold print.

2.048

2.048 01.024

2.048 0

4.9152

12.4576

1.024

4.9152 1

CLK

CLKIN FREQUENCY,

CLKIN

(MHz)

16 8

32 16 40, 50

2.4576

1.024

128 64

38.4

80, 100

20, 25

19.2

50, 60

76.8

AIN/REFIN

SAMPLING

FREQUENCY,

(kHz)

MODULATOR

FREQUENCY,

(kHz)

AVAILABLE

OUTPUT

DATA RATES

AT 16-BIT

ACCURACY

(sps)

38.4 100, 120

160, 200

4.9152 12.4576

153.6 76.8 200, 240

307.2 153.6 400, 480

MF1

MF0

X2CLK = 0

DEFAULT

X2CLK = 1

-3dB

FREQ.

(Hz)

50 13.1

OUTPUT

DATA

RATE

(sps)

5.42 3.03 1.70 1.11 1.06 1.05 1.05

TYPICAL OUTPUT NOISE (µV

RMS

)

FOR VARIOUS PROGRAMMABLE GAINS

1.04

BIT

STATUS

FS1:FS0 = 0

60 15.7 5.91 3.20 1.90 1.25 1.13 1.18 1.15 1.15 FS1:FS0 = 1

300 78.6 80.5 38.6 20.6 10.3 5.73 3.62 2.84 2.67 FS1:FS0 = 2

600

157.2 441 236 112 54.8 29.2 14.5 7.61

5.13 FS1:FS0 = 3

MF1:MF0 = 1

100

26.2 5.53 2.96 1.73 1.13 1.06 1.06 1.08 1.05 FS1:FS0 = 0

120 31.4 6.06 3.28 1.90 1.25 1.17 1.11 1.12 1.11 FS1:FS0 = 1

600 157.2 81.5 39.9 19.6 10.2 5.45 3.49 2.72 2.59 FS1:FS0 = 2

1200

314.4 450 232 115 53.4 27.8 14.7 8.00

5.08 FS1:FS0 = 3

MF1:MF0 = 2

200

52.4 5.39 2.92 1.70 1.09 1.06 1.02 1.02 1.03 FS1:FS0 = 0

240 62.9 6.27 3.28 1.89 1.20 1.18 1.14 1.17 1.11 FS1:FS0 = 1

1200 314.4 77.8 40.1 20.1 10.0 5.53 3.56 2.74 2.59 FS1:FS0 = 2

2400

628.8 431 232 109 54.9 28.2 14.1 8.08

4.99 FS1:FS0 = 3

MF1:MF0 = 3

400

104.8 5.36 3.00 1.82 1.17 1.10 1.06 1.10 1.11

FS1:FS0 = 0

480 125.7 5.88 3.25 1.94 1.28 1.26 1.16 1.17 1.15 FS1:FS0 = 1

2400 628.8 79.7 39.6 20.2 10.5 5.74 3.63 3.02 2.76 FS1:FS0 = 2

4800 1258 441 227 111 55.5 29.7 14.6 7.73 5.43 FS1:FS0 = 3

MF1:MF0 = 0x128

x64x32x16x8x4x2

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 35 36

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