參數(shù)資料
型號： ADS8382IBRHPT
廠商： TEXAS INSTRUMENTS INC
元件分類： ADC
英文描述： 1-CH 18-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PQCC28
封裝： 6 X 6 MM, GREEN, PLASTIC, QFN-28
文件頁數(shù)： 14/35頁
文件大小： 1416K
代理商： ADS8382IBRHPT
www.ti.com
THEORY OF OPERATION
The ADS8382 is a high-speed successive approximation register (SAR) analog-to-digital converter (ADC). The
REFERENCE
ADS8382
REFM
REFIN
REFOUT
AGND
0.1 mF
1 mF
ADS8382
REFM
REFIN
REFOUT
AGND
0.1 mF
1 mF
REF3040
22 mF
50 W
AGND
ADS8382
SLAS416B – JUNE 2004 – REVISED NOVEMBER 2004
architecture is based on charge redistribution, which inherently includes a sample/hold function.
The device includes a built-in conversion clock, internal reference, and 40-MHz SPI compatible serial interface.
The maximum conversion time is 1.1
s which is capable of sustaining a 600-kHz throughput.
The analog input is provided to the two input pins: +IN and –IN. When a conversion is initiated, the differential
input on these pins is sampled on the internal capacitor array. While a conversion is in progress, both inputs are
disconnected from any internal function.
The ADS8382 has a built-in 4.096-V (nominal value) reference but can operate with an external reference also.
When the internal reference is used, pin 9 (REFOUT) should be shorted to pin 8 (REFIN) and a 0.1-F
decoupling capacitor and a 1-F storage capacitor must be connected between pin 8 (REFIN) and pin 7 (REFM)
(see Figure 50). The internal reference of the converter is buffered.
Figure 50. ADS8382 Using Internal Reference
The REFIN pin is also internally buffered. This eliminates the need to put a high bandwidth buffer on the board to
drive the ADC reference and saves system area and power. When an external reference is used, the reference
must be of low noise, which may be achieved by the addition of bypass capacitors from the REFIN pin to the
REFM pin. See Figure 51 for operation of the ADS8382 with an external reference. REFM must be connected to
the analog ground plane.
Figure 51. ADS8382 Using External Reference
21
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADS8382IBRHPTG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit 600KSPS 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
ADS8382IRHPR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit 600KSPS 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
ADS8382IRHPRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit 600KSPS 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
ADS8382IRHPT 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit 600KSPS 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
ADS8382IRHPTG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18-Bit 600KSPS 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
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