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DAC081S101 Folha de dados(PDF) 6 Page - Texas Instruments

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Nome de Peças DAC081S101
Descrição Electrónicos  DAC081S101 8-Bit Micro Power Digital-to-Analog Converter with Rail-to-Rail Output
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Página de início  http://www.ti.com
Logo TI - Texas Instruments

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DAC081S101
SNAS323C – JUNE 2005 – REVISED FEBRUARY 2013
www.ti.com
AC and Timing Characteristics
Values shown in this table are design targets and are subject to change before product release.
The following specifications apply for VA = +2.7V to +5.5V, RL = 2kΩ to GND, CL = 200 pF to GND, fSCLK = 30 MHz, input
code range 4 to 251. Boldface limits apply for TMIN ≤ TA ≤ TMAX: all other limits TA = 25°C, unless otherwise specified.
Units
Parameter
Test Conditions
Typical
Limits
(Limits)
fSCLK
SCLK Frequency
30
MHz (max)
Output Voltage Settling Time
40h to C0h code
ts
CL ≤ 200 pF
3
5
µs (max)
(1)
change, RL = 2kΩ
SR
Output Slew Rate
1
V/µs
Glitch Impulse
Code change from 80h to 7Fh
12
nV-sec
Digital Feedthrough
0.5
nV-sec
VA = 5V
6
µs
tWU
Wake-Up Time
VA = 3V
39
µs
1/fSCLK
SCLK Cycle Time
33
ns (min)
tH
SCLK High time
5
13
ns (min)
tL
SCLK Low Time
5
13
ns (min)
Set-up Time SYNC to SCLK Rising
tSUCL
−15
0
ns (min)
Edge
tSUD
Data Set-Up Time
2.5
5
ns (min)
tDHD
Data Hold Time
2.5
4.5
ns (min)
VA = 5V
0
3
ns (min)
tCS
SCLK fall to rise of SYNC
VA = 3V
−2
1
ns (min)
2.7
≤ VA ≤ 3.6
9
20
ns (min)
tSYNC
SYNC High Time
3.6
≤ VA ≤ 5.5
5
10
ns (min)
(1)
This parameter is guaranteed by design and/or characterization and is not tested in production.
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 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 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 / 2
n
(1)
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 capacitance that can be driven by the DAC with output
stability maintained.
6
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