參數(shù)資料
型號(hào): EVAL-AD7762EDZ
廠商: Analog Devices Inc
文件頁(yè)數(shù): 16/29頁(yè)
文件大小: 0K
描述: BOARD EVAL CONTROL AD7762
標(biāo)準(zhǔn)包裝: 1
ADC 的數(shù)量: 1
位數(shù): 24
采樣率(每秒): 625k
數(shù)據(jù)接口: 并聯(lián)
輸入范圍: ±3.25 Vpp
在以下條件下的電源(標(biāo)準(zhǔn)): 958mW @ 625kSPS
工作溫度: -40°C ~ 85°C
已用 IC / 零件: AD7762
已供物品: 板,CD
AD7762
Data Sheet
Rev. A | Page 22 of 28
Table 13 shows the hex values (in sign and magnitude format)
that are downloaded to the AD7762 to realize this filter. The
table is also split into the bytes that are all summed to produce
the checksum. The checksum generated from these coefficients
is 0x0E6B.
Table 13. Filter Hex Values
Word 1
Word 2
Coefficient
Byte 1
Byte 2
Byte 3
Byte 4
1
03
2B
96
88
2
01
BF
18
3C
3
00
15
66
26
4
04
A8
1E
6A
5
04
5F
2A
96
6
00
2C
49
C2
7
00
50
E9
F6
8
00
10
DB
D8
9
04
2F
DE
54
10
04
37
44
5A
11
04
1B
7D
6E
12
04
3B
5F
Table 14 lists the 16-bit words the user would write to the
AD7762 to set up the ADC and download this filter, assuming
an output data rate of 625 kHz has already been selected.
Table 14.
Word
Description
0x0001
Address of Control Register 1.
0x8079
Control register data. DL filter, set filter length = 24,
set output data rate = 625 kHz.
0x032B
First coefficient, Word 1.
0x9688
First coefficient, Word 2.
0x01BF
Second coefficient, Word 1.
0x183C
Second coefficient, Word 2.
Other coefficients.
0x0404
Twelfth (final) coefficient, Word 1.
0x3B5F
Final coefficient, Word 2.
0x0E6B
Checksum. Wait (0.5 × tICLK × Number of Unused
Coefficients) for AD7762 to fill remaining unused
coefficients with 0s.
0x0001
Address of control register.
0x0879
Control register data. Set read status and maintain
filter length and decimation settings. Read contents
of status register. Check Bit 7 (DL_OK) to determine
that the filter was downloaded correctly.
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