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參數(shù)資料
| 型號： | TLV5638MFK |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | DAC |
| 英文描述： | SERIAL INPUT LOADING, 3.5 us SETTLING TIME, 12-BIT DAC, CQCC20 |
| 封裝： | HERMETIC SEALED, CERAMIC, LCC-20 |
| 文件頁數(shù)： | 5/23頁 |
| 文件大?。?/td> | 531K |
| 代理商： | TLV5638MFK |
www.ti.com
LINEARITY, OFFSET, AND GAIN ERROR USING SINGLE ENDED SUPPLIES
DAC Code
Output
Voltage
0 V
Negative
Offset
TLV5638
SLAS225C – JUNE 1999 – REVISED JANUARY 2004
When an amplifier is operated from a single supply, the voltage offset can still be either positive or negative. With
a positive offset, 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 14.
Figure 14. 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 the ground rail.
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.
13
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| TLV5638MFKB | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2.7-V TO 5.5-V LOW-POWER DUAL 12-BIT DIGITAL-TO-ANALOG CONVERTER WITH INTERNAL REFERENCE AND POWER DOWN |
| TLV5638MJG | 制造商:Texas Instruments 功能描述:DAC 2-CH Resistor-String 12-bit 8-Pin CDIP Tube 制造商:Rochester Electronics LLC 功能描述:DAC 12BITSERIAL 1 US DUAL,2.7-5V, INTREF - Bulk |
| TLV5638MJGB | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 12B1 or 3.5 us DAC Serial InpDual DAC 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)定時間:1 us 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| TLV5638QD | 功能描述:數(shù)模轉(zhuǎn)換器- DAC Dual 12bit Low Power 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)定時間:1 us 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| TLV5638QDG4 | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 12B 1 or 3.5 us DAC Serial Inp Dual DAC 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)定時間:1 us 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
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