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DAC121S101QML-SP датащи(PDF) 8 Page - Texas Instruments

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номер детали DAC121S101QML-SP
подробное описание детали  DAC121S101QML 12-Bit Micro Power Digital-to-Analog Converter with Rail-to-Rail Output
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
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DAC121S101QML-SP датащи(HTML) 8 Page - Texas Instruments

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DAC121S101QML
SNAS410E – MAY 2008 – REVISED MARCH 2013
www.ti.com
Specification Definitions
DIFFERENTIAL NON-LINEARITY (DNL) is the measure of the maximum deviation from the ideal step size of 1
LSB, which is VREF / 4096 = VA / 4096.
DIGITAL FEEDTHROUGH is a measure of the energy injected into the analog output of the DAC from the digital
inputs when the DAC outputs are not updated. It is measured with a full-scale code change on the data bus.
FULL-SCALE ERROR is the difference between the actual output voltage with a full scale code (FFFh) loaded
into the DAC and the value of VA x 4095 / 4096.
GAIN ERROR is the deviation from the ideal slope of the transfer function. It can be calculated from Zero and
Full-Scale Errors as GE = FSE - ZE, where GE is Gain error, FSE is Full-Scale Error and ZE is Zero Error.
GLITCH IMPULSE is the energy injected into the analog output when the input code to the DAC register
changes. It is specified as the area of the glitch in nanovolt-seconds.
INTEGRAL NON-LINEARITY (INL) is a measure of the deviation of each individual code from a straight line
through the input to output transfer function. The deviation of any given code from this straight line is measured
from the center of that code value. The end point method is used. INL for this product is specified over a limited
range, per the Electrical Tables.
LEAST SIGNIFICANT BIT (LSB) is the bit that has the smallest value or weight of all bits in a word. This value is
LSB = VREF / 2
n
(1)
where VREF is the supply voltage for this product, and "n" is the DAC resolution in bits, which is 12 for the
DAC121S101.
MAXIMUM LOAD CAPACITANCE is the maximum capacitance that can be driven by the DAC with output
stability maintained.
MONOTONICITY is the condition of being monotonic, where the DAC has an output that never decreases when
the input code increases.
MOST SIGNIFICANT BIT (MSB) is the bit that has the largest value or weight of all bits in a word. Its value is
1/2 of VA.
POWER EFFICIENCY is the ratio of the output current to the total supply current. The output current comes from
the power supply. The difference between the supply and output currents is the power consumed by the device
without a load.
SETTLING TIME is the time for the output to settle to within 1/2 LSB of the final value after the input code is
updated.
WAKE-UP TIME is the time for the output to exit power-down mode. This is the time measured from the falling
edge of 16th SCLK pulse to when the output voltage deviates from the power-down voltage of 0 V.
ZERO CODE ERROR is the output error, or voltage, present at the DAC output after a code of 000h has been
entered.
8
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Copyright © 2008–2013, Texas Instruments Incorporated
Product Folder Links: DAC121S101QML


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