- 您现在的位置：买卖IC网 > PDF目录98236 > TLC2558CPWR (TEXAS INSTRUMENTS INC) 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 PDF资料下载
参数资料
| 型号： | TLC2558CPWR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | ADC |
| 英文描述： | 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 |
| 封装： | GREEN, PLASTIC, TSSOP-20 |
| 文件页数： | 44/48页 |
| 文件大小： | 1074K |
| 代理商： | TLC2558CPWR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页当前第44页第45页第46页第47页第48页
TLC2554, TLC2558
5-V, 12-BIT, 400 KSPS, 4/8 CHANNEL, LOW POWER,
SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTO POWER DOWN
SLAS220A –JUNE 1999
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
converter (continued)
SC
Threshold
Detector
Node
512
VI
To Output
Latch
ST
1
2
4
8
256
512
REF–
REF+
2-Bit
R-String
DAC
Figure 1. Simplified Model of the Successive-Approximation System
In the next phase of the conversion process the threshold detector begins identifying bits by identifying the
charge (voltage) on each capacitor relative to the reference (REFM) voltage. In the switching sequence, ten
capacitors are examined separately until all ten bits are identified and the charge-convert sequence is repeated.
In the first step of the conversion phase, the threshold detector looks at the first capacitor (weight = 512). Node
512 of this capacitor is switched to the REFP voltage, and the equivalent nodes of all the other capacitors on
the ladder are switched to REFM. If the voltage at the summing node is greater than the trip point of the threshold
detector (approximately one-half the VCC voltage), a bit 0 is placed in the output register and the 512-weight
capacitor is switched to REFM. If the voltage at the summing node is less than the trip point of the threshold
detector, a bit 1 is placed in the register. The 512-weight capacitor remains connected to REFP through the
remainder of the successive-approximation process. The process is repeated for the 1024-weight capacitor,
the 128-weight capacitor, and so forth down the line until all bits are counted.
With each step of the successive-approximation process, the initial charge is redistributed among the
capacitors. The conversion process relies on charge redistribution to count and weigh the bits from MSB to LSB.
serial interface
INPUT DATA FORMAT
MSB
LSB
D15–D12
D11–D0
Command
Configuration data field
Input data is binary. All trailing blanks can be filled with zeros.
OUTPUT DATA FORMAT READ CFR
MSB
LSB
D15–D12
D11–D0
Don’t care
Register content
OUTPUT DATA FORMAT CONVERSION/READ FIFO
MSB
LSB
D15–D4
D3–D0
Conversion result
All zeros
相关PDF资料 |
PDF描述 |
|---|---|
| TLC2558CPWRG4 | 8-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 |
| TLC2554ID | 4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
| TLC2554IDR | 4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
| TLC2554QDR | 4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
| TLC2554QD | 4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TLC2558CPWRG4 | 功能描述:模数转换器 - ADC 12-bit 400 KSPS 8-Ch Serial w/Powerdown RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| TLC2558IDW | 功能描述:模数转换器 - ADC 12bit3 200kSPS SAR RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| TLC2558IDWG4 | 功能描述:模数转换器 - ADC 12bit3 200kSPS SAR RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| TLC2558IDWR | 功能描述:模数转换器 - ADC 12-bit 400 KSPS 8-Ch Serial w/Powerdown RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| TLC2558IDWRG4 | 功能描述:模数转换器 - ADC 12-bit 400 KSPS 8-Ch Serial w/Powerdown RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
发布紧急采购，3分钟左右您将得到回复。