- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄375263 > ADS1245IDGSR Low-Power, 24-Bit Analog-to-Digital Converter PDF資料下載
參數(shù)資料
| 型號： | ADS1245IDGSR |
| 英文描述： | Low-Power, 24-Bit Analog-to-Digital Converter |
| 中文描述： | 低功耗，24位模擬數(shù)字轉(zhuǎn)換器 |
| 文件頁數(shù)： | 13/19頁 |
| 文件大小： | 254K |
| 代理商： | ADS1245IDGSR |
"#$%&
SBAS287A JUNE 2003 REVISED SEPTEMBER 2003
www.ti.com
13
SLEEP MODE
Sleep mode dramatically reduces power consumption
(typically < 1
μ
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 27. Sleep Mode can be initiated at any time during
read-back; it is not necessary to retrieve all 24 bits of data
beforehand. Once t
11
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 ADS1245 is put in
Sleep mode for long periods of time and self-calibration is
desired afterwards to compensate for temperature or
supply voltage changes.
To force a self-calibration with Sleep mode, shift 25 bits out
before taking SCLK high to enter Sleep mode.
Self-calibration begins after wakeup. Figure 28 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.
DRDY/DOUT
23
22
21
1
24
0
23
SCLK
Sleep Mode
Wakeup
Data ready after wakeup
t
10
t
11
t
12
SYMBOL
DESCRIPTION
SCLK HIGH after DRDY/DOUT goes low to activate Sleep
Mode.
Sleep Mode activation time.
Data ready after wakeup.
MIN
MAX
UNITS
NOTES: (1) Values given for f
CLK
= 2.4576MHz. For different CLK frequencies, scale proportional to
CLK period.
t
10
(1)
t
11
1)
t
12
(1)
0
66.5
71
66.5
72
ms
ms
ms
63.7
Figure 27. Sleep-Mode Timing; Can Be Used for SIngle Conversions
Sleep Mode
Wakeup and begin cal.
Data ready after wakeup and calibration
t
11
t
13
DRDY/DOUT
23
1
24
25
22
21
0
23
SCLK
SYMBOL
DESCRIPTION
MIN
MAX
UNITS
t
13
(1
)
Data ready after wakeup and calibration.
210
211
ms
NOTE: (1) Values given for f
CLK
= 2.4576MHz. For different CLK frequencies, scale
proportional to CLK period.
Figure 28. Sleep-Mode with Self-Calibration on Wakeup Timing; Can Be Used for SIngle Conversions
相關PDF資料 |
PDF描述 |
|---|---|
| ADS1245IDGST | Low-Power, 24-Bit Analog-to-Digital Converter |
| ADS1250 | 20-Bit Data Acquisition System ANALOG-TO-DIGITAL CONVERTER |
| ADS1250U | 20-Bit Data Acquisition System ANALOG-TO-DIGITAL CONVERTER |
| ADS1252 | 24-Bit, 40kHz ANALOG-TO-DIGITAL CONVERTER |
| ADS1252U | 24-Bit, 40kHz ANALOG-TO-DIGITAL CONVERTER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADS1245IDGSRG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 24-bit Low-Power w/Hi-Z Input Buffer RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)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 |
| ADS1245IDGST | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 24-bit Low-Power w/Hi-Z Input Buffer RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)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 |
| ADS1245IDGST | 制造商:Texas Instruments 功能描述:IC 24-BIT ADC HIGH-Z I/P BUFFER |
| ADS1245IDGSTG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 24-bit Low-Power w/Hi-Z Input Buffer RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)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 |
| ADS1246 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:24-Bit Analog-to-Digital Converters for Temperature Sensors |
發(fā)布緊急采購，3分鐘左右您將得到回復。