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参数资料
| 型号： | TLV5619QDWG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | DAC |
| 英文描述： | PARALLEL, WORD INPUT LOADING, 1 us SETTLING TIME, 12-BIT DAC, PDSO20 |
| 封装： | GREEN, PLASTIC, SOIC-20 |
| 文件页数： | 3/23页 |
| 文件大小： | 478K |
| 代理商： | TLV5619QDWG4 |
www.ti.com
LINEARITY, OFFSET, AND GAIN ERROR SUING SINGLE END SUPPLIES
DAC Code
Output
Voltage
0 V
Negative
Offset
GENERAL FUNCTION
2 REF
CODE
0x1000
[V]
TLV5619
SLAS172F – DECEMBER 1997 – REVISED FEBRUARY 2004
APPLICATION INFORMATION (continued)
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 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 10.
Figure 10. 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.
The TLV5619 is a 12-bit, single supply DAC, based on a resistor string architecture. It consists of a parallel
interface, a power down control logic, a resistor string, and a rail-to-rail output buffer. The output voltage (full
scale determined by reference) is given by:
Where REF is the reference voltage and CODE is the digital input value, range 0x000 to 0xFFF. A power on
reset initially puts the internal latches to a defined state (all bits zero).
11
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| TLV5619QDWR | 功能描述:数模转换器- DAC 12 Bit Sngl Channel DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| TLV5619QDWREP | 功能描述:数模转换器- DAC Mil Enhance 12B Sgl Ch DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| TLV5619QDWRG4 | 功能描述:数模转换器- DAC 12B Sgl Channel DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| TLV5619-TLV5639EVM | 功能描述:数据转换 IC 开发工具 TLV5619-TLV5639 Eval Mod RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
| TLV5620 | 制造商:TI 制造商全称:Texas Instruments 功能描述:QUADRUPLE 8-BIT DIGITAL-TO-ANALOG CONVERTERS |
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