MX7705 datasheet(8/34 Pages) MAXIM

Part #	MX7705

Description	16-Bit, Low-Power, 2-Channel, Sigma-Delta ADC

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Manufacturer	MAXIM [Maxim Integrated Products]

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16-Bit, Low-Power, 2-Channel,

Sigma-Delta ADC

8

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Table 1. Output RMS Noise vs. Gain and Output Data Rate (VDD = 5V)

TYPICAL OUTPUT RMS NOISE (µV)

GAIN

FILTER FIRST

NOTCH AND

OUTPUT DATA RATE

-3dB FREQUENCY

1

2

4

8

16

32

64

128

BUFFERED (fCLKIN = 1MHz)

20Hz

5.24Hz

4.44

2.28

1.29

0.79

0.70

0.64

0.63

25Hz

6.55Hz

5.11

2.79

1.55

0.92

0.81

0.80

0.73

0.74

100Hz

26.2Hz

102.35

49.59

23.04

11.78

6.32

3.63

2.25

2.24

200Hz

52.4Hz

586.93

272.83

224.79

70.78

33.94

17.57

9.14

9.22

UNBUFFERED (fCLKIN = 1MHz)

20Hz

5.24Hz

4.32

2.50

1.35

0.81

0.73

0.70

0.64

25Hz

6.55Hz

5.16

2.85

1.63

0.96

0.83

0.81

0.74

100Hz

26.2Hz

105.78

49.86

24.67

12.16

6.42

3.80

2.22

2.23

200Hz

52.4Hz

526.60

260.51

132.16

67.25

34.09

18.20

8.95

9.08

BUFFERED (fCLKIN = 2.4576MHz)

50Hz

13.1Hz

3.53

1.86

1.09

0.73

0.72

0.71

0.67

0.66

60Hz

15.72Hz

4.41

2.23

1.29

0.83

0.79

0.77

0.72

0.73

250Hz

65.5Hz

99.66

46.85

16.98

12.48

6.38

3.78

2.32

2.35

500Hz

131Hz

608.86

288.39

110.80

67.51

36.75

17.98

9.43

9.40

UNBUFFERED (fCLKIN = 2.4576MHz)

50Hz

13.1Hz

3.65

1.94

1.17

0.79

0.70

0.69

0.66

0.65

60Hz

15.72Hz

4.56

2.41

1.32

0.87

0.80

0.79

0.71

0.74

250Hz

65.5Hz

101.56

49.64

25.39

12.92

6.65

3.69

2.36

500Hz

131Hz

556.06

278.91

142.88

74.78

35.41

18.99

9.80

9.44

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