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DAC081S101 Schematic ( PDF Datasheet ) - National Semiconductor

Teilenummer DAC081S101
Beschreibung 8-Bit Micro Power Digital-to-Analog Converter with Rail-to-Rail Output
Hersteller National Semiconductor
Logo National Semiconductor Logo 




Gesamt 19 Seiten
DAC081S101 Datasheet, Funktion
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June 2005
DAC081S101
8-Bit Micro Power Digital-to-Analog Converter with
Rail-to-Rail Output
General Description
Features
The DAC081S101 is a full-featured, general purpose 8-bit n Guaranteed Monotonicity
voltage-output digital-to-analog converter (DAC) that can n Low Power Operation
operate from a single +2.7V to 5.5V supply and consumes
just 175 µA of current at 3.6 Volts. The on-chip output
amplifier allows rail-to-rail output swing and the three wire
serial interface operates at clock rates up to 30 MHz over the
specified supply voltage range and is compatible with stan-
dard SPI, QSPI, MICROWIRE and DSP interfaces. Com-
petitive devices are limited to 20 MHz clock rates at supply
n Rail-to-Rail Voltage Output
n Power-on Reset to Zero Volts Output
n SYNC Interrupt Facility
n Wide power supply range (+2.7V to +5.5V)
n Small Packages
n Power Down Feature
voltages in the 2.7V to 3.6V range.
The supply voltage for the DAC081S101 serves as its volt- Key Specifications
age reference, providing the widest possible output dynamic n Resolution
8 bits
range. A power-on reset circuit ensures that the DAC output
powers up to zero volts and remains there until there is a
valid write to the device. A power-down feature reduces
power consumption to less than a microWatt.
The low power consumption and small packages of the
DAC081S101 make it an excellent choice for use in battery
operated equipment.
The DAC081S101 is a direct replacement for the AD5300
n DNL
+0.04, -0.02 LSB (typ)
n Output Settling Time
3 µs (typ)
n Zero Code Error
3.8 mV (typ)
n Full-Scale Error
−0.07 %FS (typ)
n Power Consumption
— Normal Mode 0.63 mW (3.6V) / 1.41 mW (5.5V) typ
— Pwr Down Mode 0.14 µW (3.6V) / 0.33 µW (5.5V) typ
and is one of a family of pin compatible DACs, includDinagtathSeheeAt4pU.pcolimcations
10-bit DAC101S101 and the 12-bit DAC121S101. The
DAC081S101 operates over the extended industrial tem- n Battery-Powered Instruments
perature range of −40˚C to +105˚C.
n Digital Gain and Offset Adjustment
n Programmable Voltage & Current Sources
n Programmable Attenuators
Pin Configuration
DataShee
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Ordering Information
Order Numbers
DAC081S101CIMM
DAC081S101CIMMX
DAC081S101CIMK
DAC081S101CIMKX
DAC081S101EVAL
Temperature Range
−40˚C TA +105˚C
−40˚C TA +105˚C
−40˚C TA +105˚C
−40˚C TA +105˚C
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Package
MSOP
MSOP Tape-and-Reel
TSOT
TSOT Tape-and-Reel
Evaluation Board
Top Mark
X64C
X64C
X65C
X65C
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DAC081S101 Datasheet, Funktion
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et4U.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 / 256 = VA / 256.
DIGITAL FEEDTHROUGH is a measure of the energy in-
jected into the analog output of the DAC from the digital
inputs when the DAC outputs are not updated. It is mea-
sured 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 (FFh) loaded into the
DAC and the value of VA x 255 / 256.
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 / 2n
where VREF is the supply voltage for this product, and "n" is
the DAC resolution in bits, which is 8 for the DAC081S101.
MAXIMUM LOAD CAPACITANCE is the maximum capaci-
tance 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
output 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 within 1/2
LSB of the final value after the input code is updated.
WAKE-UP TIME is the time for the output to settle to within
1/2 LSB of the final value after the device is commanded to
the active mode from any of the power down modes.
ZERO CODE ERROR is the output error, or voltage, present
at the DAC output after a code of 00h has been entered.
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DAC081S101 pdf, datenblatt
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Typical Performance Characteristics fSCLK = 30 MHz, TA = 25C, Input Code Range 4 to 251, unless
otherwise stated (Continued)
Full-Scale Error vs. Clock Duty Cycle
Full-Scale Error vs. Temperature
et4U.com
Supply Current vs. VA
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Supply Current vs. Temperature
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DataShee
5V Glitch Response
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Power-On Reset
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20155146
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