- 您現在的位置：買賣IC網 > PDF目錄98236 > TLC2543QDWRQ1 (TEXAS INSTRUMENTS INC) 11-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 PDF資料下載
參數資料
| 型號： | TLC2543QDWRQ1 |
| 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： | PLASTIC, SOIC-20 |
| 文件頁數： | 14/25頁 |
| 文件大小： | 413K |
| 代理商： | TLC2543QDWRQ1 |
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PDF資料 |
PDF描述 |
|---|---|
| TLC2543MDBREP | 11-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 |
| TLC2543QDWREP | 11-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 |
| TLC2543MFK | 11-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, CQCC20 |
| TLC2552IDGK | 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8 |
| TLC2552IDR | 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO8 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TLC254ACD | 功能描述:運算放大器 - 運放 Quad LinCMOS RoHS:否 制造商:STMicroelectronics 通道數量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| TLC254ACDG4 | 功能描述:運算放大器 - 運放 LinCMOS Quad OP AMP RoHS:否 制造商:STMicroelectronics 通道數量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| TLC254ACN | 功能描述:運算放大器 - 運放 Lin CMOS Quad RoHS:否 制造商:STMicroelectronics 通道數量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| TLC254ACNE4 | 功能描述:運算放大器 - 運放 LinCMOS Quad Op Amp RoHS:否 制造商:STMicroelectronics 通道數量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| TLC254BCD | 功能描述:運算放大器 - 運放 LinCMOS Quad RoHS:否 制造商:STMicroelectronics 通道數量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
發布緊急采購，3分鐘左右您將得到回復。