Rainbow Electronics MAX11043 - Manual (Page 30)

MAX11043
4-Channel, 16-Bit, Simultaneous-Sampling ADCs
with PGA, Filter, and 8-/12-Bit Dual-Stage DAC
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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
Register Map (Filter A, Stage 3)
BIT 15 BIT 14 BIT 13 BIT 12 BIT 11 BIT 10 BIT 9 BIT 8
X GAIN2 GAIN1 GAIN0 X X X X
Format for Filter Stage Gain (51h)
X<15>: Don’t-care bit. Not used.
GAIN2:GAIN0<14:12>: Filter gain.
000 = 2 4 = 16.
001 = 2 2 = 4.
010 = 2 0 = 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
X X X X X X X X
Digital Filter Coefficients