MAX11043 Maxim Integrated Products, MAX11043 Datasheet - Page 31

• Manufacturer Part Number: MAX11043
• Description: Simultaneous Sampling ADCs
• Manufacturer: Maxim Integrated Products

w w w . D a t a S h e e t 4 U . c o m
Filter coefficients A2, A3, and B2 are stored as 16-bit
two’s complement values in the -4 to (4 - 2
The transfer function equation is as follows:
where N is the decimal coefficient value.
The following are two examples of the transfer function
equation:
B3 Coefficient (55h)
B31:B30<15:14>: Filter coefficient B3.
11 = -1.
00 = 0.
01 = 1.
10 = 0.
For best performance, use PCBs with ground planes.
Ensure that digital and analog signal lines are separat-
ed from each other. Do not run analog and digital lines
parallel to one another (especially clock lines), and do
not run digital lines underneath the MAX11043 pack-
age. Use a single-point analog ground (star ground
point) at AGND, separate from the logic ground.
Connect all other analog grounds and DGND to this
star ground point. Do not connect other digital system
grounds to this single-point analog ground. The ground
return to the power supply for this ground should be
low impedance and as short as possible for noise-free
BIT 15
BIT 7
4-Channel, 16-Bit, Simultaneous-Sampling ADCs
B31
X
Power Supplies, Layout, and
with PGA, Filter, and 8-/12-Bit Dual-Stage DAC
Bypassing Considerations
______________________________________________________________________________________
BIT 14
A2 = int (N x 2
BIT 6
B30
X
A2, A3, and B2 Filter Coefficient
Format (52h, 54h, 56h)
BIT 13
13
BIT 5
)
X
X
-13
) range.
BIT 12
RECT
BIT 4
X
Example 1:
N = 2.381
A2 = int (2.381 x 2
A2 = int (19505.152)
A2 = 19505 = 4C31h (two’s complement)
Example 2:
N = -2.381
A2 = int (-2.381 x 2
A2 = int (-19505.152)
A2 = -19505 = B3CFh (two’s complement)
X<13>: Don’t-care bit. Not used.
RECT<12>: Rectify bit.
0 = bipolar output.
1 = output rectified. All samples positive.
X<11:0>: Don’t-care bits. Not used.
operation. Bypass all supplies to ground with high
quality capacitors as close as possible to the device.
PROCESS: BiCMOS
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages.
PACKAGE TYPE
BIT 11
BIT 3
X
X
40 TQFN
BIT 10
BIT 2
13
X
X
13
PACKAGE CODE
)
)
Package Information
T4066-5
Chip Information
BIT 9
BIT 1
X
X
DOCUMENT NO.
21-0141
BIT 8
BIT 0
X
X
31