DAC121C085CIMMX/NOPB National Semiconductor, DAC121C085CIMMX/NOPB Datasheet - Page 9

DAC 12BIT MICROPWR I2C 8-MSOP

DAC121C085CIMMX/NOPB

Manufacturer Part Number
DAC121C085CIMMX/NOPB
Description
DAC 12BIT MICROPWR I2C 8-MSOP
Manufacturer
National Semiconductor
Series
PowerWise®r
Datasheet

Specifications of DAC121C085CIMMX/NOPB

Settling Time
6µs
Number Of Bits
12
Data Interface
I²C
Number Of Converters
1
Voltage Supply Source
Single Supply
Power Dissipation (max)
730µW
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
For Use With
DAC121C08XEB - BOARD EVAL FOR DAC121C081/5
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
DAC121C085CIMMX

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Note 6: Reflow temperature profiles are different for lead-free packages.
Note 7: The inputs are protected as shown below. Input voltage magnitudes up to 5.5V, regardless of V
example, if V
Note 8: To guarantee accuracy, it is required that V
Note 9: Typical figures are at T
Level).
Note 10: This parameter is guaranteed by design and/or characterization and is not tested in production.
Note 11: Spike suppression filtering on SCL and SDA will supress spikes that are less than 50ns for standard-fast mode and less than 10ns for hs-mode.
Note 12: Applies to the Multiplying DAC configuration. In this configuration, the reference is used as the analog input. The value loaded in the DAC Register will
digitally attenuate the signal at Vout.
Note 13: C
Specification Definitions
DIFFERENTIAL NON-LINEARITY (DNL) is the measure of
the maximum deviation from the ideal step size of 1 LSB,
which is V
DIGITAL FEEDTHROUGH is a measure of the energy inject-
ed into the analog output of the DAC from the digital inputs
when the DAC output is 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 V
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 out-
put 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 de-
viation 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 small-
est value or weight of all bits in a word. This value is
where V
the DAC resolution in bits, which is 12 for the DAC121C081.
REF
b
REF
refers to the capacitance of one bus line. C
A
is 3V, the digital input pins can be driven with a 5V logic device.
is the supply voltage for this product, and "n" is
/ 4096 = V
LSB = V
A
A
J
x 4095 / 4096.
/ 4096.
= 25°C, and represent most likely parametric norms. Test limits are guaranteed to National's AOQL (Average Outgoing Quality
REF
/ 2
n
A
and V
b
is expressed in pF units.
REF
be well bypassed.
9
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 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 V
MULTIPLYING BANDWIDTH is the frequency at which the
output amplitude falls 3dB below the input sine wave on
V
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 cur-
rents 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.
TOTAL HARMONIC DISTORTION (THD) is the measure of
the harmonics present at the output of the DACs with an ideal
sine wave applied to V
WAKE-UP TIME is the time for the output to exit power-down
mode. This time is measured from the rising edge of SCL
during the ACK bit of the lower data byte to the time the output
voltage deviates from the power-down voltage of 0V.
ZERO CODE ERROR is the output error, or voltage, present
at the DAC output after a code of 000h has been entered.
REFIN
30004904
with a full-scale code loaded into the DAC.
A
, will not cause errors in the conversion result. For
REFIN
. THD is measured in dB.
www.national.com
A
.

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