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參數(shù)資料
型號(hào)： TLV5535IPWRQ1
廠商： TEXAS INSTRUMENTS INC
元件分類： ADC
英文描述： 1-CH 8-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28
封裝： PLASTIC, TSSOP-28
文件頁(yè)數(shù)： 7/35頁(yè)
文件大小： 659K
代理商： TLV5535IPWRQ1
TLV5535Q1
8BIT, 35 MSPS, LOW POWER ANALOGTODIGITAL CONVERTER
SGLS230A JANUARY 2004 REVISED JUNE 2008
15
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLE OF OPERATION
analog input (continued)
So, for applications running at a lower fCLK, the total source resistance will increase proportionally.
AIN
CI
S1
RSW
RS
VS
TLV5535
Figure 12. Simplified Equivalent Input Circuit
dc coupled input
For dc-coupled systems an op amp can level-shift a ground-referenced input signal. A circuit as shown in
Figure 13(a) is acceptable. Alternatively, the user might want a bipolar shift together with the bottom reference
voltage as seen in Figure 13(b). In this case the AIN voltage is given by:
AIN
+ 2
R
2 ÷
R
1 )
R
2
V
REF
–V
IN
_
+
AVDD
VIN
REFTI
REFTO
REFBI
REFBO
AIN
TLV5535
_
+
VREF
VIN
REFTI
REFTO
REFBI
REFBO
AIN
TLV5535
RIN
R1
RIN
R2
(a)
(b)
Figure 13. DC-Coupled Input Circuit
ac coupled input
For many applications, especially in single supply operation, ac coupling offers a convenient way for biasing
the analog input signal at the proper signal range. Figure 14 shows a typical configuration. To maintain the
outlined specifications, the component values need to be carefully selected. The most important issue is the
positioning of the 3-dB high-pass corner point f3 dB, which is a function of R2 and the parallel combination of
C1 and C2, called Ceq. This is given by the following equation:
f
–3 dB +
1
÷ 2π xR
2
xCeq
where Ceq is the parallel combination of C1 and C2.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TLV5535PW 制造商:TI 制造商全稱:Texas Instruments 功能描述:8-BIT, 35 MSPS, LOW-POWER ANALOG-TO-DIGITAL CONVERTER
TLV5535-Q1 制造商:TI 制造商全稱:Texas Instruments 功能描述:8-BIT, 35 MSPS, LOW-POWER ANALOG-TO-DIGITAL CONVERTER
TLV5580 制造商:TI 制造商全稱:Texas Instruments 功能描述:8-BIT, 80 MSPS LOW-POWER A/D CONVERTER
TLV5580CDW 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8 BIT, 80 MSPS LOW-POWER 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
TLV5580CDWG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 8Bit 80MSPS 1-Ch High Ch Band 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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