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参数资料
| 型号： | ADS1244IDGSR |
| 厂商： | Texas Instruments |
| 文件页数： | 5/24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
13
SBAS273
www.ti.com
SLEEP MODE
Sleep Mode dramatically reduces power consumption (typi-
cally < 1
W with CLK stopped) by shutting down all of the
active circuitry. To enter Sleep Mode, simply hold SCLK
HIGH after DRDY/DOUT goes LOW, as shown in Figure 15.
Sleep Mode can be initiated at any time during read back; it
is not necessary to retrieve all 24 bits of data beforehand.
Once t11 has passed with SCLK held HIGH, Sleep Mode will
activate. DRDY/DOUT stays HIGH once Sleep Mode begins.
SCLK must remain HIGH to stay in Sleep Mode. To exit
Sleep Mode (“wakeup”), set SCLK LOW. The first data after
exiting Sleep Mode is valid. It is not necessary to stop CLK
during Sleep Mode, but doing so will further reduce the digital
supply current.
Sleep Mode With Self-Calibration
Self-calibration can be set to run immediately after exiting
Sleep Mode. This is useful when the ADS1244 is put in Sleep
Mode for long periods of time and self-calibration is desired
afterwards to compensate for temperature or supply voltage
changes.
FIGURE 16. Sleep Mode with Self-Calibration on Wakeup Timing; Can be Used for Single Conversions.
SYMBOL
DESCRIPTION
MIN
MAX
UNITS
t13(1)
Data ready after wakeup and calibration.
210
211
ms
NOTE: (1) Values given for fCLK = 2.4576MHz. For different CLK frequencies, scale proportional to CLK
period.
Sleep Mode
Wakeup and begin cal.
Data ready after wakeup and cal.
t
11
t
13
DRDY/DOUT
23
124
25
22
21
0
23
SCLK
To force a self-calibration with Sleep Mode, shift 25 bits out
before taking SCLK HIGH to enter Sleep Mode. Self-calibra-
tion will then begin after wakeup. Figure 16 shows the
appropriate timing. Note the extra time needed after wakeup
for calibration before data is ready. The first data after Sleep
Mode with self-calibration is fully-settled and can be used.
SINGLE CONVERSIONS
When only single conversions are needed, Sleep Mode can
be used to start and stop the ADS1244. To make a single
conversion, first enter the Sleep Mode holding SCLK HIGH.
Now, when ready to start the conversion, take SCLK LOW.
The ADS1244 will wake up and begin the conversion. Wait
for DRDY/DOUT to go LOW, and then retrieve the data.
Afterwards, take SCLK HIGH to stop the ADS1244 from
converting and re-enter Sleep Mode. Continue to hold SCLK
HIGH until ready to start the next conversion. Operating in
this fashion greatly reduces power consumption since the
ADS1244 is shut down while idle between conversions. Self-
calibrations can be performed prior to the start of the single
conversions by using the waveform shown in Figure 16.
FIGURE 15. Sleep Mode Timing; Can be Used for Single Conversions.
DRDY/DOUT
23
22
21
124
023
SCLK
Sleep Mode
Wakeup
Data ready after wakeup.
t
10
t
11
t
12
SYMBOL
DESCRIPTION
MIN
MAX
UNITS
t10(1)
SCLK HIGH after DRDY/DOUT goes LOW to activate
0
63.7
ms
Sleep Mode.
t11(1)
Sleep Mode activation Time.
66.5
ms
t12(1)
Data ready after wakeup.
71
72
ms
NOTE: (1) Values given for fCLK = 2.4576MHz. For different CLK frequencies, scale proportional to CLK
period.
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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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