AMC1210_14 Datasheet, PDF (30/54 Pages) Texas Instruments – Quad Digital Filter for 2nd-Order Delta-Sigma Modulator

AMC1210
SBAS372D – APRIL 2006 – REVISED MAY 2009.............................................................................................................................................................. www.ti.com
Sinc Filter Parameter Register (addresses 0x02, 0x08, 0x0E,and 0x14)
The Sinc Filter Parameter Register includes the oversampling ratio (OSR), filter enable, structure and signal
mode control bits. Table 15 shows the Sinc Filter Parameter Register.
Bit 15
–
Bit 14
–
Bit 13
–
Bit 12
–
Table 15. Sinc Filter Parameter Register
Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4
SST1 SST0 AE
FEN SOSR SOSR SOSR SOSR
7
6
5
4
Bit 3
SOSR
3
Bit 2
SOSR
2
Bit 1
SOSR
1
Bit 0
SOSR
0
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
R
R
R
R
RW RW RW RW RW RW RW RW RW RW RW RW
BIT POSITION
15–12
11–10
9
8
7–0
BIT
–
SST1–SST0
AE
FEN
SOSR7–SOSR0
DESCRIPTION
Unused. Always read '0'.
Sinc filter structure.
00: Sinc filter runs with a sincfast structure
01: Sinc filter runs with a Sinc¹ structure
10: Sinc filter runs with a Sinc² structure
11: Sinc filter runs with a Sinc³ structure
Acknowledge enable.
0: The acknowledge flag is disabled for the particular filter
1: The acknowledge flag is enabled for the particular filter
Filter enable.
0: The filter is disabled and no data is produced
1: The filter is enabled and data are produced in the sinc filter and/or integrator
Oversampling ratio. The actual rate is SOSR + 1.
These bits set the oversampling ratio of the filter.
0xFF represents an oversampling ratio of 256.
30
Submit Documentation Feedback
Product Folder Link(s): AMC1210
Copyright © 2006–2009, Texas Instruments Incorporated