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AD5318 データシート(PDF) 6 Page - Analog Devices

部品番号 AD5318
部品情報  2.5 V to 5.5 V Octal Voltage Output 8-/10-/12-Bit DACs in 16-Lead TSSOP
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メーカー  AD [Analog Devices]
ホームページ  http://www.analog.com
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AD5318 データシート(HTML) 6 Page - Analog Devices

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REV. B
–6–
AD5308/AD5318/AD5328
TERMINOLOGY
Relative Accuracy
For the DAC, relative accuracy or integral nonlinearity (INL) is
a measure of the maximum deviation, in LSB, from a straight
line passing through the endpoints of the DAC transfer function.
Typical INL versus code plots can be seen in TPCs 1, 2, and 3.
Differential Nonlinearity
Differential nonlinearity (DNL) is the difference between the
measured change and the ideal 1 LSB change between any two
adjacent codes. A specified differential nonlinearity of
±1 LSB
maximum ensures monotonicity. This DAC is guaranteed
monotonic by design. Typical DNL versus code plots can be
seen in TPCs 4, 5, and 6.
Offset Error
This is a measure of the offset error of the DAC and the output
amplifier (see Figures 2 and 3). It can be negative or positive,
and is expressed in mV.
Gain Error
This is a measure of the span error of the DAC. It is the devia-
tion in slope of the actual DAC transfer characteristic from the
ideal expressed as a percentage of the full-scale range.
Offset Error Drift
This is a measure of the change in offset error with changes in
temperature. It is expressed in (ppm of full-scale range)/
°C.
Gain Error Drift
This is a measure of the change in gain error with changes in
temperature. It is expressed in (ppm of full-scale range)/
°C.
DC Power Supply Rejection Ratio (PSRR)
This indicates how the output of the DAC is affected by changes
in the supply voltage. PSRR is the ratio of the change in VOUT
to a change in VDD for full-scale output of the DAC. It is mea-
sured in dB. VREF is held at 2 V and VDD is varied
±10%.
DC Crosstalk
This is the dc change in the output level of one DAC in response
to a change in the output of another DAC. It is measured with a
full-scale output change on one DAC while monitoring another
DAC. It is expressed in
µV.
Reference Feedthrough
This is the ratio of the amplitude of the signal at the DAC out-
put to the reference input when the DAC output is not being
updated (i.e.,
LDAC is high). It is expressed in dB.
Channel-to-Channel Isolation
This is the ratio of the amplitude of the signal at the output of
one DAC to a sine wave on the reference input of another DAC.
It is measured in dB.
Major-Code Transition Glitch Energy
Major-code transition glitch energy is the energy of the impulse
injected into the analog output when the code in the DAC
register changes state. It is normally specified as the area of the
glitch in nV-s and is measured when the digital code is changed by
1 LSB at the major carry transition (011 . . . 11 to 100 . . . 00 or
100 . . . 00 to 011 . . . 11).
Digital Feedthrough
Digital feedthrough is a measure of the impulse injected into the
analog output of a DAC from the digital input pins of the device,
but is measured when the DAC is not being written to (
SYNC
held high). It is specified in nV-s and is measured with a full-
scale change on the digital input pins, i.e., from all 0s to all 1s
and vice versa.
Digital Crosstalk
This is the glitch impulse transferred to the output of one DAC
at midscale in response to a full-scale code change (all 0s to all
1s and vice versa) in the input register of another DAC. It is
measured in standalone mode and is expressed in nV-s.
Analog Crosstalk
This is the glitch impulse transferred to the output of one DAC
due to a change in the output of another DAC. It is measured
by loading one of the input registers with a full-scale code change
(all 0s to all 1s and vice versa) while keeping
LDAC high. Then
pulse
LDAC low and monitor the output of the DAC whose
digital code was not changed. The area of the glitch is expressed
in nV-s.
DAC-to-DAC Crosstalk
This is the glitch impulse transferred to the output of one DAC
due to a digital code change and subsequent output change of
another DAC. This includes both digital and analog crosstalk. It
is measured by loading one of the DACs with a full-scale code
change (all 0s to all 1s and vice versa) with
LDAC low and
monitoring the output of another DAC. The energy of the glitch
is expressed in nV-s.
Multiplying Bandwidth
The amplifiers within the DAC have a finite bandwidth. The
multiplying bandwidth is a measure of this. A sine wave on the
reference (with full-scale code loaded to the DAC) appears on
the output. The multiplying bandwidth is the frequency at
which the output amplitude falls to 3 dB below the input.
Total Harmonic Distortion
This is the difference between an ideal sine wave and its attenuated
version using the DAC. The sine wave is used as the reference
for the DAC, and the THD is a measure of the harmonics present
on the DAC output. It is measured in dB.


同様の部品番号 - AD5318

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同様の説明 - AD5318

メーカー部品番号データシート部品情報
logo
Analog Devices
AD5308 AD-AD5308_1 Datasheet
575Kb / 24P
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