参数资料
| 型号： | ADS1259BIPWR |
| 厂商： | Texas Instruments |
| 文件页数： | 11/48页 |
| 文件大小： | 0K |
| 描述： | IC ADC 24BIT SPI 14KSPS 20TSSOP |
| 标准包装： | 2,000 |
| 位数： | 24 |
| 采样率（每秒）： | 14k |
| 数据接口： | 串行，SPI? |
| 转换器数目： | 1 |
| 电压电源： | 模拟和数字，双 ± |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 2 个单端，单极；2 个单端，双极；1 个差分，单极；1 个差分，双极 |
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0
-
20
40
60
80
100
120
140
Magnitude(dB)
0
10
20
30
40
50
60
Frequency(kHz)
0
-
20
40
60
80
100
120
140
Magnitude(dB)
0
10
20
30
40
50
60
Frequency(kHz)
sinc
1
sinc
2
0
10
-
20
30
40
50
60
70
80
90
100
Magnitude(dB)
55
56
57
58
59
60
65
Frequency(Hz)
61
62
63
64
sinc
1
sinc
2
SBAS424D
– JUNE 2009 – REVISED AUGUST 2011
The sinc5 filter produces wide notches at fCLK/512 and
multiples thereof. At these frequencies the filter has
zero gain. Figure 40 shows the response data rate =
14.4kSPS.
With decimation of the second stage, the wide
notches produced by the sinc5 filter remain, but a
number of narrow notches are superimposed in the
response. The first of the notches occur at the data
rate. The number of superimposed notches is
determined by the decimation ratio, minus 1.
The second stage filter has notches (or zeroes) at the
data rate and multiples thereof. Figure 41 shows the
response of the second stage filter combined with the
sinc5
stage.
Decimation
of
4
produces
three
equally-spaced notches between each main notch of
Figure 40. Frequency Response
the sinc5 filter. The frequency response of the other
for Data Rate = 14.4kSPS
data rates (higher decimation ratios) produces a
similar pattern, but with more equally-spaced notches
notch frequency and the
–3dB bandwidth.
Figure 42 illustrates the detail of the magnitude
response with data rate = 60SPS. Note that input
frequencies within the
±1% 60Hz bandwidth are
attenuated 40dB by the sinc1 filter and 80dB by the
sinc2 filter.
Table 4. First Notch Frequency and
–3dB Filter
Bandwidth(1)
–3dB BANDWIDTH (Hz)
DATA RATE
FIRST NOTCH
(SPS)
(Hz)
sinc1
sinc2
10
4.3
3.1
16.6
7.3
5.2
50
22
16
Figure 41. Frequency Response
60
27
19
(Data Rate = 3600SPS, R = 4)
400
177
127
1200
525
380
3600
1440
1100
14400
2930
See (4)
(1) fCLK = 7.3728MHz.
(2) Notch at 50Hz and 60Hz.
(3) Notch at 50Hz.
(4) Same as sinc1.
Figure 42. Magnitude Response
for Data Rate = 60SPS
Copyright
2009–2011, Texas Instruments Incorporated
19
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADS1259EVM | 功能描述:数据转换 IC 开发工具 ADS1259 Eval Mod RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| ADS1259EVM | 制造商:Texas Instruments 功能描述:DEVELOPMENT TOOL |
| ADS1259EVM-PDK | 功能描述:数据转换 IC 开发工具 ADS1259 Perf Demo Kit RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| ADS1259EVM-PDK | 制造商:Texas Instruments 功能描述:DEVELOPMENT TOOL |
| ADS1259IPW | 功能描述:模数转换器 - ADC Low-Noise 14kSPS 24B ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
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