參數(shù)資料
型號： TLC2543IDBRG4Q1
廠商： TEXAS INSTRUMENTS INC
元件分類： ADC
英文描述： 11-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20
封裝： GREEN, PLASTIC, SSOP-20
文件頁數(shù)： 14/25頁
文件大?。?/td> 413K
代理商： TLC2543IDBRG4Q1
TLC2543Q1
12BIT ANALOGTODIGITAL CONVERTERS
WITH SERIAL CONTROL AND 11 ANALOG INPUTS
SGLS218D NOVEMBER 2003 REVISED MAY 2008
21
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
simplified analog input analysis
Using the equivalent circuit in Figure 18, the time required to charge the analog input capacitance from 0 V to
VS within 1/2 LSB can be derived as follows:
The capacitance charging voltage is given by:
(1)
Where:
Rt = Rs + ri
V
C +
V
S
1–e
–tc RtCi
The final voltage to 1/2 LSB is given by:
(2)
VC (1/2 LSB) = VS (VS/8192)
Equating equation 1 to equation 2 and solving for time tc gives:
(3)
and
tc (1/2 LSB) = Rt × Ci × ln(8192)
(4)
V
S *
V
S
8192
+ V
S
1–e
–tc RtCi
Therefore, with the values given, the time for the analog input signal to settle is:
(5)
tc (1/2 LSB) = (Rs + 1 k) × 60 pF × ln(8192)
This time must be less than the converter sample time shown in the timing diagrams.
Rs
ri
VS
VC
60 pF Max
1 k
Max
Driving Source
TLC2543
Ci
VI
VI = Input Voltage at AIN
VS = External Driving Source Voltage
Rs = Source Resistance
ri = Input Resistance
Ci = Input Capacitance
VC= Capacitance Charging Voltage
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.
Rs must not exceed 1 k.
Figure 18. Equivalent Input Circuit Including the Driving Source
相關(guān)PDF資料
PDF描述
TLC2543IDBRQ1 11-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TLC2543IDBRQ1 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Auto Catlg 12B Anlog Digital Converters 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
TLC2543IDW 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12bit ADC w/11 Ch 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
TLC2543IDW 制造商:Texas Instruments 功能描述:A/D Converter (A-D) IC
TLC2543IDWG4 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12Bit 66kSPS Ser Out Prog MSB/LSB First 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
TLC2543IDWR 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12Bit 66kSPS Ser Out Prog MSB/LSB First 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32
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