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參數(shù)資料
| 型號(hào)： | TLC5620ID |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | DAC |
| 英文描述： | SERIAL INPUT LOADING, 10 us SETTLING TIME, 8-BIT DAC, PDSO14 |
| 封裝： | GREEN, PLASTIC, SOIC-14 |
| 文件頁數(shù)： | 13/17頁 |
| 文件大?。?/td> | 389K |
| 代理商： | TLC5620ID |
TLC5620C, TLC5620I
QUADRUPLE 8-BIT DIGITAL-TO-ANALOG CONVERTERS
SLAS081E – NOVEMBER 1994 – REVISED NOVEMBER 2001
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
linearity, offset, and gain error using single-end supplies
When an amplifier is operated from a single supply, the voltage offset can still be either positive or negative. With
a positive offset voltage, the output voltage changes on the first code change. With a negative offset the output
voltage may not change with the first code depending on the magnitude of the offset voltage.
The output amplifier attempts to drive the output to a negative voltage. However, because the most negative
supply rail is ground, the output cannot drive below ground and clamps the output at 0 V.
The output voltage then remains at zero until the input code value produces a sufficient positive output voltage
to overcome the negative offset voltage, resulting in the transfer function shown in Figure 5.
DAC Code
Output
Voltage
0 V
Negative
Offset
Figure 5. Effect of Negative Offset (Single Supply)
This offset error, not the linearity error, produces this breakpoint. The transfer function would have followed the
dotted line if the output buffer could drive below ground.
For a DAC, linearity is measured between zero-input code (all inputs 0) and full-scale code (all inputs 1) after
offset and full scale are adjusted out or accounted for in some way. However, single-supply operation does not
allow for adjustment when the offset is negative due to the breakpoint in the transfer function. So the linearity
is measured between full-scale code and the lowest code that produces a positive output voltage. The code is
calculated from the maximum specification for the negative offset voltage.
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| TLC5620IN | 功能描述:數(shù)模轉(zhuǎn)換器- DAC Quad 8bit DigitAL/AN RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| TLC5620INE4 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 8-Bit 10us Quad DAC Serial Input RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
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