Maxim MX7705 Manual do Utilizador descarregar pdf (Página 10)

MX7705

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

Sigma-Delta ADC

10 ______________________________________________________________________________________

Table 3. Output RMS Noise vs. Gain and Output Data Rate (V

= 3V)

TYPICAL OUTPUT RMS NOISE (µV)

GAIN

FILTER FIRST

NOTCH AND

OUTPUT DATA RATE

-3dB FREQUENCY

1248163264128

BUFFERED (f

CLKIN

= 1MHz)

20Hz 5.24Hz 3.52 1.84 2.19 0.73 0.66 0.62 0.62 0.62

25Hz 6.55Hz 4.24 2.23 1.19 0.84 0.74 0.69 0.69 0.69

100Hz 26.2Hz 50.36 25.12 12.06 6.04 3.38 2.23 1.70 1.69

200Hz 52.4Hz 268.02 175.98 65.77 34.89 16.73 8.76 4.70 4.70

UNBUFFERED (f

CLKIN

= 1MHz)

20Hz 5.24Hz 3.58 1.92 1.13 0.72 0.66 0.64 0.61 0.62

25Hz 6.55Hz 4.16 2.27 1.27 0.83 0.74 0.70 0.69 0.67

100Hz 26.2Hz 50.48 23.89 12.10 5.90 3.26 0.70 1.66 1.63

200Hz 52.4Hz 256.43 135.78 65.62 33.18 16.65 8.47 4.66 4.68

BUFFERED (f

CLKIN

= 2.4576MHz)

50Hz 13.1Hz 2.84 1.68 2.00 0.71 0.67 0.65 0.63 0.61

60Hz 15.72Hz 3.27 1.84 1.12 0.78 0.75 0.70 0.68 0.67

250Hz 65.5Hz 47.90 24.43 12.56 6.48 3.45 2.32 1.64 1.66

500Hz 131Hz 281.03 104.19 69.58 34.59 17.44 9.20 5.16 4.92

UNBUFFERED (f

CLKIN

= 2.4576MHz)

50Hz 13.1Hz 3.04 1.74 1.03 0.72 0.64 0.64 0.62 0.63

60Hz 15.72Hz 3.35 1.80 1.13 0.81 0.73 0.69 0.67 0.68

250Hz 65.5Hz 49.63 23.82 13.03 6.23 3.42 2.22 1.68 1.65

500Hz 131Hz 279.13 134.82 69.47 35.42 17.47 9.55 4.90 5.18

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 32 33

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Maxim MX7705 Manual do Utilizador Página 10