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參數資料
| 型號： | ADS1244IDGSRG4 |
| 廠商： | Texas Instruments |
| 文件頁數： | 4/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC LP CONVERT 24BIT 10-MSOP |
| 產品培訓模塊： | Data Converter Basics |
| 視頻文件： | Nuts and Bolts of the Delta-Sigma Converter |
| 標準包裝： | 2,500 |
| 位數： | 24 |
| 采樣率（每秒）： | 15 |
| 數據接口： | 串行 |
| 轉換器數目： | 1 |
| 功率耗散（最大）： | 270µW |
| 電壓電源： | 模擬和數字 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-TFSOP，10-MSOP（0.118"，3.00mm 寬） |
| 供應商設備封裝： | 10-MSOP |
| 包裝： | 帶卷 (TR) |
| 輸入數目和類型： | 2 個單端，單極；1 個差分，雙極 |
| 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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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADS1244IDGST | 功能描述:模數轉換器 - ADC 24-Bit Delta-Sigma 15SPS w/50-60Hz rej RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS1244IDGSTG4 | 功能描述:模數轉換器 - ADC 24-Bit Delta-Sigma 15SPS w/50-60Hz rej RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS1245 | 制造商:BB 制造商全稱:BB 功能描述:Low-Power, 24-Bit Analog-to-Digital Converter |
| ADS1245IDGSR | 功能描述:模數轉換器 - ADC 24-bit Low-Power w/Hi-Z Input Buffer RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ADS1245IDGSRG4 | 功能描述:模數轉換器 - ADC 24-bit Low-Power w/Hi-Z Input Buffer RoHS:否 制造商:Texas Instruments 通道數量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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