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参数资料
| 型号： | TLC0820ACDWRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | ADC |
| 英文描述： | 1-CH 8-BIT FLASH METHOD ADC, PARALLEL ACCESS, PDSO20 |
| 封装： | GREEN, PLASTIC, SOIC-20 |
| 文件页数： | 15/15页 |
| 文件大小： | 345K |
| 代理商： | TLC0820ACDWRG4 |
TLC0820AC, TLC0820AI
Advanced LinCMOS
HIGH-SPEED 8-BIT ANALOG-TO-DIGITAL
CONVERTERS USING MODIFIED FLASH TECHNIQUES
SLAS064A – SEPTEMBER 1986 – REVISED JUNE 1994
2–9
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
The TLC0820AC and TLC0820AI each employ a combination of sampled-data comparator techniques and flash
techniques common to many high-speed converters. Two 4-bit flash analog-to-digital conversions are used to give
a full 8-bit output.
The recommended analog input voltage range for conversion is – 0.1 V to VCC + 0.1 V. Analog input signals that are
less than Vref– + 1/2 LSB or greater than Vref+ – 1/2 LSB convert to 00000000 or 11111111, respectively. The reference
inputs are fully differential with common-mode limits defined by the supply rails. The reference input values define
the full-scale range of the analog input. This allows the gain of the ADC to be varied for ratiometric conversion by
changing the Vref+ and Vref– voltages.
The device operates in two modes, read (only) and write-read, that are selected by MODE. The converter is set to
the read (only) mode when MODE is low. In the read mode, WR/RDY is used as an output and is referred to as the
ready terminal. In this mode, a low on WR/RDY while CS is low indicates that the device is busy. Conversion starts
on the falling edge of RD and is completed no more than 2.5
s later when INT falls and WR/RDY returns to the
high-impedance state. Data outputs also change from high-impedance to active states at this time. After the data is
read, RD is taken high, INT returns high, and the data outputs return to their high-impedance states.
When MODE is high, the converter is set to the write-read mode and WR/RDY is referred to as the write terminal.
Taking CS and WR/RDY low selects the converter and initiates measurement of the input signal. Approximately
600 ns after WR/RDY returns high, the conversion is completed. Conversion starts on the rising edge of WR/RDY
in the write-read mode.
The high-order 4-bit flash ADC measures the input by means of 16 comparators operating simultaneously. A
high-precision 4-bit DAC then generates a discrete analog voltage from the result of that conversion. After a time
delay, a second bank of comparators does a low-order conversion on the analog difference between the input level
and the high-order DAC output. The results from each of these conversions enter an 8-bit latch and are output to the
3-state output buffers on the falling edge of RD.
相关PDF资料 |
PDF描述 |
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| TLC0820AIFNG3 | 1-CH 8-BIT FLASH METHOD ADC, PARALLEL ACCESS, PQCC20 |
| TLC0820ACFNG3 | 1-CH 8-BIT FLASH METHOD ADC, PARALLEL ACCESS, PQCC20 |
| TLC0820AIDWRG4 | 1-CH 8-BIT FLASH METHOD ADC, PARALLEL ACCESS, PDSO20 |
| TLC0820ACFNR | 1-CH 8-BIT FLASH METHOD ADC, PARALLEL ACCESS, PQCC20 |
| TLC0820ACN | 1-CH 8-BIT FLASH METHOD ADC, PARALLEL ACCESS, PDIP20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TLC0820ACFN | 功能描述:模数转换器 - ADC _ 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 |
| TLC0820ACFNG3 | 功能描述:模数转换器 - ADC 8-Bit 392 kSPS Parallel Out 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 |
| TLC0820ACFNR | 功能描述:模数转换器 - ADC 8-Bit 392 kSPS Parallel Out 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 |
| TLC0820ACFNRG3 | 功能描述:模数转换器 - ADC 8-Bit 392 kSPS Parallel Out 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 |
| TLC0820ACI | 制造商:TI 制造商全称:Texas Instruments 功能描述:Advanced LinCMOS TM HIGH-SPEED 8-BIT ANALOG-TO-DIGITAL CONVERTERS USING MODIFIED FLASH TECHNIQUES |
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