Datasheet

DAC161S055

www.ti.com

SNAS503B –NOVEMBER 2010–REVISED JANUARY 2012

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

/ 65536.

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 V

REF

x 65535 / 65536.

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 (MSB) is the bit that has the smallest value or weight of all bits in a word. This value

is LSB = V

REF

/ 2

where V

REF

is the reference voltage for this product, and "n" is the DAC resolution in bits,

which is 16 for the DAC161S055.

MAXIMUM LOAD CAPACITANCE is the maximum capacitance that can be driven by the DAC with output

stability maintained, although some ringing may be present.

MONOTONICITY is the condition of being monotonic, where the DAC output 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

REF

OFFSET ERROR is the difference between zero voltage and a where a straight line fit to the actual transfer

function intersects the y axis.

SETTLING TIME is the time for the output to settle to within 1 LSB of the final value after the input code is

updated.

WAKE-UP TIME is the time for the output to recover 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 0000h has been

entered.

Product Folder Links: DAC161S055