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| 型号： | ADS1222IPWT |
| 厂商： | Texas Instruments |
| 文件页数： | 8/26页 |
| 文件大小： | 0K |
| 描述： | IC 24BIT ADC W/2CH MUX 14-TSSOP |
| 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： | 1 |
| 位数： | 24 |
| 采样率（每秒）： | 240 |
| 数据接口： | 串行 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 2.25mW |
| 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： | 14-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 14-TSSOP |
| 包装： | 标准包装 |
| 输入数目和类型： | 4 个单端，单极；2 个差分，双极 |
| 其它名称： | 296-17321-6 |
ADS1222
SBAS314B APRIL 2004 REVISED JANUARY 2009
www.ti.com
16
SYMBOL
DESCRIPTION
MIN
MAX
UNITS
t9(1)
SCLK high after DRDY/DOUT goes low to activate Standby mode
0
8.272
ms
t10(1)
Standby mode activation time
8.272
8.304
ms
t11(1)
Data ready after exiting Standby mode
27.7
28.1
ms
(2) Values given for fCLK = 2MHz. For different fCLK frequencies, scale proportional to CLK period.
DRDY/DOUT
23
22
21
124
023
SCLK
Standby Mode
Start Conversion
Data Ready
t
9
t
10
t
11
Figure 28. Standby Mode Timing (can be used for single conversions)
SYMBOL
DESCRIPTION
MIN
MAX
UNITS
t12(1)
Data ready after exiting Standby mode and calibration
78.8
79.7
ms
(1) Values given for fCLK = 2MHz. For different fCLK frequencies, scale proportional to CLK period.
Standby Mode
Begin Calibration
Data Ready After Calibration
t
10
t
12
DRDY/DOUT
23
124
25
22
21
0
23
SCLK
Figure 29. Standby Mode with Self-Calibration Timing (can be used for single conversions)
SINGLE CONVERSIONS
When only single conversions are needed, Standby
mode can be used to start and stop the ADS1222. To
make a single conversion, first enter the Standby mode
holding SCLK high. Now, when ready to start the
conversion, take SCLK low. The ADS1222 wakes up
and begins the conversion. Wait for DRDY/DOUT to go
low, and then retrieve the data. Afterwards, take SCLK
high to stop the ADS1222 from converting and re-enter
Standby mode. Continue to hold SCLK high until ready
to start the next conversion. Operating in this fashion
greatly
reduces
power
consumption
since
the
ADS1222 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 29.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADS1222IPWT | 制造商:Texas Instruments 功能描述:IC 24-BIT ADC 2 CH DIFF I/P MULTI |
| ADS1222IPWTG4 | 功能描述:模数转换器 - ADC 24-Bit Conv w/2-Ch Diff Input Mltplxer 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 |
| ADS1224 | 制造商:BB 制造商全称:BB 功能描述:24-Bit Analog-to-Digital Converter with 4-Channel Differential Input Multiplexer |
| ADS1224EVM | 功能描述:数据转换 IC 开发工具 ADS1224 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 |
| ADS1224IPWR | 功能描述:模数转换器 - ADC 24-bit 240SPS 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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