参数资料
| 型号： | ADS1234IPWG4 |
| 厂商： | Texas Instruments |
| 文件页数： | 8/39页 |
| 文件大小： | 0K |
| 描述： | IC ADC 24BIT BRDG SENSOR 28TSSOP |
| 产品培训模块： | Data Converter Basics |
| 视频文件： | Nuts and Bolts of the Delta-Sigma Converter |
| 标准包装： | 50 |
| 位数： | 24 |
| 采样率（每秒）： | 10，80 |
| 数据接口： | 串行 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 4.3mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 28-TSSOP |
| 包装： | 管件 |
| 输入数目和类型： | 4 个单端，单极；2 个差分，双极 |
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FREQUENCY RESPONSE
Frequency (kHz)
G
a
in
(d
B
)
0
20
40
60
80
100
120
140
160
180
200
38.4
76.8
0
f
CLK = 4.9152MHz
Frequency (Hz)
G
a
in
(d
B
)
0
50
100
150
0
10
20
30
40
50
60
70
80
90
100
(a)
Frequency (Hz)
(b)
G
a
in
(d
B
)
50
100
150
49
48
46 47
50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
Data Rate = 10SPS
SBAS350F – JUNE 2005 – REVISED FEBRUARY 2008
Figure 31(b) shows the zoom in plot for both 50Hz
and 60Hz notches with the SPEED pin tied low
The ADS1232/4 use a sinc4 digital filter with the
(10SPS data rate). With only a ±3% variation of the
frequency response (fCLK = 4.9152MHz) shown in
internal
oscillator,
over
100dB
of
normal-mode
Figure 30. The frequency response repeats at
rejection is achieved.
multiples of the modulator sampling frequency of
76.8kHz. The overall response is that of a low-pass
filter with a –3dB cutoff frequency of 3.32Hz with the
SPEED pin tied low (10SPS data rate) and 11.64Hz
with the SPEED pin tied high (80SPS data rate).
Figure 30. Frequency Response
To help see the response at lower frequencies,
Figure 31(a) illustrates the response out to 100Hz,
when the data rate = 10SPS. Notice that signals at
multiples
of
10Hz
are
rejected,
and
therefore
simultaneous rejection of 50Hz and 60Hz is achieved.
The benefit of using a sinc4 filter is that every
Figure 31. Frequency Response Out To 100Hz
frequency notch has four zeros on the same location.
This response, combined with the low drift internal
oscillator,
provides
an
excellent
normal-mode
The ADS1232/4 data rate and frequency response
rejection of line-cycle interference.
scale directly with clock frequency. For example, if
fCLK increases from 4.9152MHz to 6.144MHz when
the SPEED pin is tied high, the data rate increases
from 80SPS to 100SPS, while notches also increase
from 80Hz to 100Hz. Note that this is only possible
when the external clock source is applied.
16
Copyright 2005–2008, Texas Instruments Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADS1234IPWR | 功能描述:模数转换器 - ADC 24-Bit Ultra Low-Noise 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 |
| ADS1234IPWRG4 | 功能描述:模数转换器 - ADC 24-Bit Ultra Low-Noise 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 |
| ADS1240 | 制造商:TI 制造商全称:Texas Instruments 功能描述:24-Bit ANALOG-TO-DIGITAL CONVERTER |
| ADS1240E | 功能描述:模数转换器 - ADC 24-Bit Anlg-to-Dig Converter 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 |
| ADS1240E | 制造商:Texas Instruments 功能描述:IC 24BIT ADC SMD 1240 SSOP24 制造商:Texas Instruments 功能描述:IC, 24BIT ADC, SMD, 1240, SSOP24 制造商:Texas Instruments 功能描述:IC, 24BIT ADC, SMD, 1240, SSOP24; Resolution (Bits):24bit; Sampling Rate:15SPS; Supply Voltage Type:Single; Supply Voltage Min:2.7V; Supply Voltage Max:5.25V; Supply Current:760A; Digital IC Case Style:SSOP; No. of Pins:24; Input ;RoHS Compliant: Yes |
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