Datasheet

DB15 DB0
SCLK
D
IN
SYNC
t
SYNC
t
DS
t
DH
t
CL
t
CH
1 / f
SCLK
t
SH
|
|
||
1 2 13 14 15 16
t
SS
DAC088S085
www.ti.com SNAS424C –AUGUST 2007–REVISED MARCH 2013
Timing Diagrams
Figure 1. Serial Timing Diagram
Specification Definitions
DIFFERENTIAL NON-LINEARITY (DNL) is the measure of the maximum deviation from the ideal step size of 1
LSB, which is V
REF
/ 256 = V
A
/ 256.
DAC-to-DAC CROSSTALK is the glitch impulse transferred to a DAC output in response to a full-scale change
in the output of another DAC.
DIGITAL CROSSTALK is the glitch impulse transferred to a DAC output at mid-scale in response to a full-scale
change in the input register of another DAC.
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 (FFh) loaded
into the DAC and the value of V
A
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 Electrical Characteristics.
LEAST SIGNIFICANT BIT (LSB) is the bit that has the smallest value or weight of all bits in a word. This value is
LSB = V
REF
/ 2
n
(1)
where V
REF
is the supply voltage for this product, and "n" is the DAC resolution in bits, which is 8 for the
DAC088S085.
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 V
A
.
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