參數(shù)資料
型號(hào)： ADS8330IRSARG4
英文描述： LOW POWER, 16-BIT, 1-MHz, SINGLE/DUAL UNIPOLAR INPUT, ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL INTERFACE
中文描述： 低功耗，16位，1兆赫，單/雙單極性輸入，模擬到數(shù)字串行接口變換器
文件頁(yè)數(shù)： 23/42頁(yè)
文件大?。?/td> 1768K
代理商： ADS8330IRSARG4
www.ti.com
ADS8329/30
+IN/(+IN1 or +IN0)
IN/COM
THS4031
20
20
470 pF
50
Input
Signal
(0 V to 4 V)
5 V
+VA
ADS8329
+IN/(+IN1 or +IN0)
IN/COM
THS4031
20
20
600
1 V DC
600
Input
Signal
(2V to 2 V)
5 V
+VA
470 pF
REFERENCE
The ADS8329/30 can operate with an external reference with a range from 0.3 V to 5 V. A clean, low noise,
well-decoupled reference voltage on this pin is required to ensure good performance of the converter. A low
noise band-gap reference like the REF3240 can be used to drive this pin. A 22-
μ
F ceramic decoupling capacitor
is required between the REF+ and REF- pins of the converter. These capacitors should be placed as close as
possible to the pins of the device. The REF- should be connected to its own via to the analog ground plane with
the shortest possible distance.
CONVERTER OPERATION
The ADS8329/30 has an oscillator that is used as an internal clock which controls the conversion rate. The
frequency of this clock is 21 MHz minimum. The oscillator is always on unless the device is in the deep
powerdown state or the device is programmed for using SCLK as the conversion clock (CCLK). The minimum
acquisition (sampling) time takes 3 CCLKs (this is equivalent to 120 ns at 24.5 MHz) and the conversion time
takes 18 conversion clocks (CCLK) (~780 ns) to complete one conversion.
ADS8329
ADS8330
SLAS516–DECEMBER 2006
THEORY OF OPERATION (continued)
Figure 52. Unipolar Input Drive Configuration
Figure 53. Bipolar Input Drive Configuration
The conversion can also be programmed to run based on the external serial clock, SCLK, if is so desired. This
allows a system designer to achieve system synchronization. The serial clock SCLK, is first reduced to 1/2 of its
frequency before it is used as the conversion clock (CCLK). For example, with a 42-MHz SCLK this provides a
21-MHz clock for conversions. If it is desired to start a conversion at a specific rising edge of the SCLK when the
external SCLK is programmed as the source of the conversion clock (CCLK) (and manual start of conversion is
selected), the setup time between CONVST and that rising SCLK edge should be observed. This ensures the
conversion is complete in 18 CCLKs (or 36 SCLKs). The minimum setup time is 20 ns to ensure synchronization
between CONVST and SCLK. In many cases the conversion can start one SCLK period (or CCLK) later which
results in a 19 CCLK (or 37 SCLK) conversion. The 20 ns setup time is not required once synchronization is
relaxed.
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相關(guān)PDF資料
PDF描述
ADS8330IRSAT LOW POWER, 16-BIT, 1-MHz, SINGLE/DUAL UNIPOLAR INPUT, ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL INTERFACE
ADS8330IRSATG4 LOW POWER, 16-BIT, 1-MHz, SINGLE/DUAL UNIPOLAR INPUT, ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL INTERFACE
ADS8328IPW LOW POWER, 16-BIT, 500-kHz, SINGLE/DUAL UNIPOLAR INPUT, ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL INTERFACE
ADS8327I LOW POWER, 16-BIT, 500-kHz, SINGLE/DUAL UNIPOLAR INPUT, ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL INTERFACE
ADS8327IB LOW POWER, 16-BIT, 500-kHz, SINGLE/DUAL UNIPOLAR INPUT, ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL INTERFACE
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADS8330IRSAT 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 2.7V-5.5V 16 Bit 1 MSPS Serial ADC 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS8330IRSATG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 2.7V-5.5V 16 Bit 1 MSPS Serial ADC 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ADS8331 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Power, 16-Bit, 500kSPS, 4-/8-Channel Unipolar Input ANALOG-TO-DIGITAL CONVERTERS with Serial Interface
ADS8331_10 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Power, 16-Bit, 500kSPS, 4-/8-Channel Unipolar Input ANALOG-TO-DIGITAL CONVERTERS with Serial Interface
ADS8331_1003 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Power, 16-Bit, 500kSPS, 4-/8-Channel Unipolar Input ANALOG-TO-DIGITAL CONVERTERS with Serial Interface
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