参数资料
型号: AD7762BSVZ-REEL
厂商: Analog Devices Inc
文件页数: 16/29页
文件大小: 0K
描述: IC ADC 24BIT 625KSPS 64TQFP
标准包装: 1,500
位数: 24
采样率(每秒): 625k
数据接口: 并联
转换器数目: 1
功率耗散(最大): 958mW
电压电源: 模拟和数字
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-TQFP 裸露焊盘
供应商设备封装: 64-TQFP-EP(10x10)
包装: 带卷 (TR)
输入数目和类型: 1 个差分,单极;1 个差分,双极
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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