MCP3464R-ESLASHST datasheet(27/118 Pages) MICROCHIP

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DS20006404C-page 27

MCP3461/2/4R

TABLE 2-3:

OUTPUT NOISE VS. GAIN VS. OSR (AVDD = DVDD = 3.3V, VREF = 2.4V INTERNAL,

TA =+25°C)

TOTAL

OSR

RMS (Peak-to-Peak) Noise (µV)

GAIN = 0.33

GAIN = 1

GAIN = 2

GAIN = 4

GAIN = 8

GAIN = 16

281.5 (2167.7)

93.7 (739.7)

47.5 (372.3)

24.2 (191.7)

12.6 (96.4)

6.8 (52.9)

111.0 (525.3)

36.6 (178.2)

18.3 (92.8)

9.2 (53.1)

4.8 (33.6)

3.0 (22.1)

128

111.0 (325.5)

36.6 (112.3)

18.3 (65.9)

9.2 (34.2)

4.6 (21.7)

2.3 (14.2)

256

111.0 (222.0)

36.6 (80.6)

18.3 (41.5)

9.2 (27.5)

4.6 (14.7)

2.3 (10.8)

512

111.0 (222.0)

36.6 (73.2)

18.3 (36.6)

9.2 (18.9)

4.6 (10.1)

2.3 (6.7)

1024

111.0 (222.0)

36.6 (73.2)

18.3 (36.6)

9.2 (18.3)

4.6 (9.2)

2.3 (5.3)

2048

111.0 (222.0)

36.6 (73.2)

18.3 (36.6)

9.2 (18.3)

4.6 (9.2)

2.3 (4.6)

4096

111.0 (222.0)

36.6 (73.2)

18.3 (36.6)

9.2 (18.3)

4.6 (9.2)

2.3 (4.6)

8192

111.0 (222.0)

36.6 (73.2)

18.3 (36.6)

9.2 (18.3)

4.6 (9.2)

2.3 (4.6)

16384

111.0 (222.0)

36.6 (73.2)

18.3 (36.6)

9.2 (18.3)

4.6 (9.2)

2.3 (4.6)

20480

111.0 (222.0)

36.6 (73.2)

18.3 (36.6)

9.2 (18.3)

4.6 (9.2)

2.3 (4.6)

24576

111.0 (222.0)

36.6 (73.2)

18.3 (36.6)

9.2 (18.3)

4.6 (9.2)

2.3 (4.6)

40960

111.0 (222.0)

36.6 (73.2)

18.3 (36.6)

9.2 (18.3)

4.6 (9.2)

2.3 (4.6)

49152

111.0 (222.0)

36.6 (73.2)

18.3 (36.6)

9.2 (18.3)

4.6 (9.2)

2.3 (4.6)

81920

111.0 (222.0)

36.6 (73.2)

18.3 (36.6)

9.2 (18.3)

4.6 (9.2)

2.3 (4.6)

98304

111.0 (222.0)

36.6 (73.2)

18.3 (36.6)

9.2 (18.3)

4.6 (9.2)

2.3 (4.6)

TABLE 2-4:

EFFECTIVE RESOLUTION VS. GAIN VS. OSR (AVDD = DVDD = 3.3V, VREF = 2.4V

INTERNAL, TA = +25°C)

TOTAL

OSR

Effective Resolution RMS (Peak-to-Peak) (bits)

GAIN = 0.33

GAIN = 1

GAIN = 2

GAIN = 4

GAIN = 8

GAIN = 16

15.7 (12.7)

15.6 (12.7)

15.6 (12.6)

15.5 (12.6)

15.4 (12.5)

17.0 (14.8)

17.0 (14.7)

17.0 (14.5)

16.9 (14.1)

16.6 (13.8)

128

17.0 (15.5)

17.0 (15.2)

17.0 (15.1)

17.0 (14.8)

17.0 (14.4)

256

17.0 (16.0)

17.0 (15.9)

17.0 (15.5)

17.0 (15.4)

17.0 (14.8)

512

17.0 (16.0)

17.0 (15.9)

17.0 (15.5)

1024

17.0 (16.0)

17.0 (15.8)

2048

17.0 (16.0)

4096

17.0 (16.0)

8192

17.0 (16.0)

16384

17.0 (16.0)

20480

17.0 (16.0)

24576

17.0 (16.0)

40960

17.0 (16.0)

49152

17.0 (16.0)

81920

17.0 (16.0)

98304

17.0 (16.0)

Note:

To calculate noise RMS level and Effective Resolution (Bits) for a given GAIN and data rate, refer to the

OSR setting and associated data rate relationship shown in Table 5-6.

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