參數(shù)資料
型號(hào)： TLC1543CDBR
廠(chǎng)商： TEXAS INSTRUMENTS INC
元件分類(lèi)： ADC
英文描述： 11-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20
封裝： GREEN, PLASTIC, SSOP-20
文件頁(yè)數(shù)： 11/32頁(yè)
文件大?。?/td> 770K
代理商： TLC1543CDBR
www.ti.com
SIMPLIFIED ANALOG INPUT ANALYSIS
VC = VS 1e
t c/RtCi
(
)
where
Rt = Rs + ri
(1)
VC (1/2 LSB) = VS (VS/2048)
(2)
VS (VS/2048) = VS 1e
(
)
t c/RtCi
and
tc (1/2 LSB) = Rt × Ci × ln(2048)
(3)
tc (1/2 LSB) = (Rs + 1 k) × 60 pF × ln(2048)
(4)
Rs
ri
VS
VC
1 k
MAX
Driving Source
TLC1542/3
Ci
50 pF MAX
VI
VI = Input Voltage at A0A10
VS = External Driving Source Voltage
Rs = Source Resistance
ri = Input Resistance
Ci = Equivalent Input Capacitance
Driving source requirements:
Noise and distortion for the source must be equivalent to the
resolution of the converter.
Rs must be real at the input frequency.
SLAS052G – MARCH 1992 – REVISED JANUARY 2006
APPLICATION INFORMATION (continued)
Using the equivalent circuit in Figure 17Figure 17, the time required to charge the analog input capacitance from
0 to VS within 1/2 LSB can be derived as follows:
The capacitance charging voltage is given by
The final voltage to 1/2 LSB is given by
Equating equation 1 to equation 2 and solving for time tc gives
Therefore, with the values given the time for the analog input signal to settle is
This time must be less than the converter sample time shown in the timing diagrams.
Figure 17. Equivalent Input Circuit Including the Driving Source
19
相關(guān)PDF資料
PDF描述
TLC1542INE4 11-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDIP20
TLC1543CDBG4 11-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20
TLC1542MFKB 11-CH 10-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, CQCC20
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相關(guān)代理商/技術(shù)參數(shù)
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TLC1543CDBRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10Bit 38kSPS SerOut On-Chip Sys Clk 11Ch 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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
TLC1543CDW 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10bit A/D w/Ser In 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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
TLC1543CDWG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10Bit 38kSPS SerOut On-Chip Sys Clk 11Ch 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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
TLC1543CDWR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10Bit 38kSPS SerOut On-Chip Sys Clk 11Ch 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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
TLC1543CDWRG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 10Bit 38kSPS SerOut On-Chip Sys Clk 11Ch 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(lèi)型:Differential 信噪比:107 dB 接口類(lèi)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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