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参数资料
| 型号： | ADS1244IDGSR |
| 厂商： | Texas Instruments |
| 文件页数： | 4/24页 |
| 文件大小： | 0K |
| 描述： | IC ADC LP CONVERT 24BIT 10-MSOP |
| 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： | 2,500 |
| 位数： | 24 |
| 采样率（每秒）： | 15 |
| 数据接口： | 串行 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 270µW |
| 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： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 2 个单端，单极；1 个差分，双极 |
| 配用： | 296-18359-ND - EVALUATION MODULE FOR ADS1244 |
ADS1244
12
SBAS273
www.ti.com
FIGURE 14. Self-Calibration Timing.
23
DRDY/DOUT
SCLK
124
t
9
25
26
23
22
21
0
Data ready after cal.
Cal begins.
SYMBOL
DESCRIPTION
MIN
MAX
UNITS
t9(1)
First data ready after calibration.
209
210
ms
NOTE: (1) Values given for fCLK = 2.4576MHz. For different CLK frequencies, scale proportional to CLK
period.
SELF-CALIBRATION
The user can initiate self-calibration at any time, though in
many applications the ADS1244’s drift performance is good
enough that the self-calibration performing automatically at
power-up is all that is needed. To initiate a self-calibration,
apply at least two additional SCLKs after retrieving 24 bits of
data. Figure 14 shows the timing pattern. The 25th SCLK will
send DRDY/DOUT HIGH. The falling edge of the 26th SCLK
will begin the calibration cycle. Additional SCLK pulses may
be sent after the 26th SCLK, but try to minimize activity on
SCLK during calibration for best results.
When the calibration is complete, DRDY/DOUT will go LOW
indicating that new data is ready. There is no need to alter the
analog input signal applied to the ADS1244 during calibration,
the inputs pins are disconnected within the A/D converter and
the appropriate signals applied internally automatically. The
first conversion after a calibration is fully settled and valid for
use. The time required for a calibration depends on two
independent signals: the falling edge of SCLK and an internal
clock derived from CLK. Variations in the internal calibration
values will change the time required for calibration (t9) within
the range given by the MIN/MAX specs. t12 and t13 described
in the next section are affected likewise.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADS1244IDGSRG4 | 功能描述:模数转换器 - ADC 24-Bit Delta-Sigma 15SPS w/50-60Hz rej 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 |
| ADS1244IDGST | 功能描述:模数转换器 - ADC 24-Bit Delta-Sigma 15SPS w/50-60Hz rej 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 |
| ADS1244IDGSTG4 | 功能描述:模数转换器 - ADC 24-Bit Delta-Sigma 15SPS w/50-60Hz rej 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 |
| ADS1245 | 制造商:BB 制造商全称:BB 功能描述:Low-Power, 24-Bit Analog-to-Digital Converter |
| ADS1245IDGSR | 功能描述:模数转换器 - ADC 24-bit Low-Power w/Hi-Z Input Buffer 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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