參數(shù)資料
型號: THS1041CDW
廠商: TEXAS INSTRUMENTS INC
元件分類: ADC
英文描述: 1-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28
封裝: GREEN, PLASTIC, SOIC-28
文件頁數(shù): 10/41頁
文件大?。?/td> 810K
代理商: THS1041CDW
THS1041
SLAS289C OCTOBER 2001 REVISED OCTOBER 2004
18
www.ti.com
PRINCIPLES OF OPERATION
internal reference mode (MODE = AVDD or AVDD/2)
Sample
and
Hold
X1
ADC
Core
PGA
AIN+
AIN
Internal
Reference
Buffer
VREF
AGND
AVDD + VREF
2
AVDD VREF
2
Figure 27. ADC Reference Generation, MODE = AVDD/2
Connecting MODE to AVDD or AVDD/2 enables the internal ADC references buffer A2. The outputs of A2 are
connected to the REFT and REFB pins and its inputs are connected to pins VREF and AGND. The resulting
voltages at REFT and REFB are:
REFT
+
AV
DD )
VREF
2
REFB
+
AV
DD *
VREF
2
Depending on the connection of the REFSENSE pin, the voltage on VREF may be driven by an off-chip source
or by the internal bandgap reference (A1) (see onboard reference generator configuration) to match the
THS1041 input range to their application requirements.
When MODE = AVDD the CLAMPOUT pin provides a buffered, stabilized AVDD/2 output voltage that can be
used as a bias reference for ac coupling networks connecting the signal sources to the AIN+ or AIN inputs.
This removes the need for the user to provide a stabilized external bias reference.
(8)
(9)
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THS1041CDWR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10 Bit 40 MSPS Lo-Pwr 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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