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參數資料
型號: TLC3548IPWRG4
廠商: TEXAS INSTRUMENTS INC
元件分類: ADC
英文描述: 8-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24
封裝: GREEN, PLASTIC, TSSOP-24
文件頁數: 6/44頁
文件大小: 1000K
代理商: TLC3548IPWRG4
TLC3544, TLC3548
5-V ANALOG, 3-/5-V DIGITAL, 14-BIT, 200-KSPS, 4-/8-CHANNELS SERIAL
ANALOG-TO-DIGITAL CONVERTERS WITH 0-5 V (PSEUDODIFFERENTIAL) INPUTS
SLAS266C – OCTOBER 2000 – REVISED MAY 2003
14
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
detailed description (continued)
Charge
Redistribution
DAC
Control
Logic
_
+
REFM
Ain
ADC Code
Figure 5. Simplified Block Diagram of the Successive-Approximation System
analog input range and internal test voltages
TLC3548 has eight analog inputs (TLC3544 has four) and three test voltages. The inputs are selected by the
analog multiplexer according to the command entered (see Table 1). The input multiplexer is a break-
before-make type to reduce input-to-input noise injection resulting from channel switching.
The TLC3544 and TLC3548 are specified for a unipolar input range of 0-V to 4-V when the internal reference
is selected, and 0-V to 5-V when an external 5-V reference is used.
analog input mode
Two input signal modes can be selected: single-ended input and pseudodifferential input.
_
+
Charge
Redistribution
DAC
Control
Logic
Ain(+)
REFM
ADC Code
S1
Ain(–)
When sampling, S1 is closed and S2 connects to Ain(–).
During conversion, S1 is open and S2 connects to REFM.
Figure 6. Simplified Pseudodifferential Input Circuit
Pseudodifferential input refers to the negative input, Ain(–); its voltage is limited in magnitude to
±0.2 V. The input
frequency limit of Ain(–) is the same as the positive input Ain(+). This mode is normally used for ground noise
rejection or dc bias offset.
When pseudodifferential mode is selected, only two analog input channel pairs are available for the TLC3544
and four channel pairs for the TLC3548, because half the inputs are used as the negative input (see Figure 7).
相關PDF資料
PDF描述
TLC3544CPWG4 4-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20
TLC3544IDWG4 4-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20
TLC3548IPWG4 8-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24
TLC3548IDWR 8-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24
TLC3548IDWG4 8-CH 14-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO24
相關代理商/技術參數
參數描述
TLC354CD 功能描述:校驗器 IC Quad Differential RoHS:否 制造商:STMicroelectronics 產品: 比較器類型: 通道數量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓(最大值):6 mV 電源電流(最大值):1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
TLC354CDG4 功能描述:校驗器 IC Quad Differential RoHS:否 制造商:STMicroelectronics 產品: 比較器類型: 通道數量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓(最大值):6 mV 電源電流(最大值):1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
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TLC354CPW 功能描述:校驗器 IC Quad Differential RoHS:否 制造商:STMicroelectronics 產品: 比較器類型: 通道數量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓(最大值):6 mV 電源電流(最大值):1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
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