Rainbow-electronics MAX11043 Bedienungsanleitung PDF herunterladen (Seite 30)

MAX11043

4-Channel, 16-Bit, Simultaneous-Sampling ADCs

with PGA, Filter, and 8-/12-Bit Dual-Stage DAC

30 ______________________________________________________________________________________

COEFFICIENT FLASH

ADDRESS

FUNCTION

51h Gain for filter A, stage 3

52h A2 coefficient for filter A, stage 3

53h Not used; set to 0

54h A3 coefficient for filter A, stage 3

55h

B3 coefficient and rectify flag

(RECT) for filter A, stage 3

56h B2 coefficient for filter A, stage 3

Table 4. Typical Filter Coefficients

BIT 15 BIT 14 BIT 13 BIT 12 BIT 11 BIT 10 BIT 9 BIT 8

XGAIN2GAIN1GAIN0XXXX

Format for Filter Stage Gain (51h)

X<15>: Don’t-care bit. Not used.

GAIN2:GAIN0<14:12>: Filter gain.

000 = 2

= 16.

001 = 2

= 4.

010 = 2

= 1.

011 = 2

-2

= 0.25.

100 = 2

-4

= 0.0625.

101 = 2

-6

= 0.015625.

110 = 2

-8

= 0.00390625.

111 = 2

-10

= 0.0009765625.

X<11:0>: Don’t-care bits. Not used.

BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0

XXXXXXXX

Digital Filter Coefficients

1 2 ... 25 26 27 28 29 30 31 32

MAX11043 1

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