參數(shù)資料
型號: TLV5620C
廠商: Texas Instruments, Inc.
英文描述: QUADRUPLE 8-BIT DIGITAL-TO-ANALOG CONVERTERS
中文描述: 翻兩番8位數(shù)字,模擬轉(zhuǎn)換器
文件頁數(shù): 6/14頁
文件大小: 196K
代理商: TLV5620C
TLV5620C, TLV5620I
QUADRUPLE 8-BIT DIGITAL-TO-ANALOG CONVERTERS
SLAS110B – JANUARY 1995 – REVISED APRIL 1997
6
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, therefore, 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 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.
相關(guān)PDF資料
PDF描述
TLV5620I QUADRUPLE 8-BIT DIGITAL-TO-ANALOG CONVERTERS
TLV5628C OCTAL 8-BIT DIGITAL-TO-ANALOG CONVERTERS
TLV5628I OCTAL 8-BIT DIGITAL-TO-ANALOG CONVERTERS
tlv5633(中文) 2.7V to 5.5V Low Power 12-Bit Digital-to-Analog Converters with Internal Reference and Power Down(2.7V-5.5V,12位低功耗,帶自動掉電和內(nèi)部基準(zhǔn)的DAC)
TLV5633C 2.7 V TO 5.5 V LOW POWER 12-BIT DIGITAL-TO-ANALOG CONVERTERS WITH INTERNAL REFERENCE AND POWER DOWN
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