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参数资料
| 型号： | AD5322BRM |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | DAC |
| 英文描述： | 12-bit, 210MSPS ADC with DDR LVDS/CMOS outputs 48-VQFN -40 to 85 |
| 中文描述： | SERIAL INPUT LOADING, 8 us SETTLING TIME, 12-BIT DAC, PDSO10 |
| 封装： | MO-187BA, MSOP-10 |
| 文件页数： | 6/16页 |
| 文件大小： | 207K |
| 代理商： | AD5322BRM |
REV. 0
AD5302/AD5312/AD5322
–6–
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
the other 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) while keeping
LDAC
low
and monitoring the output of the other DAC. The area of the
glitch is expressed in nV-secs.
DC CROSSTALK
This is the dc change in the output level of one DAC in re-
sponse to a change in the output of the other DAC. It is mea-
sured with a full-scale output change on one DAC while
monitoring the other DAC. It is expressed in
μ
V.
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
V
OUT
to a change in V
DD
for full-scale output of the DAC. It is
measured in dBs. V
REF
is held at +2 V and V
DD
is varied
±
10%.
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 dBs.
TOTAL HARMONIC DISTORTION
This is the difference between an ideal sine wave and its attenu-
ated version using the DAC. The sine wave is used as the refer-
ence for the DAC and the THD is a measure of the harmonics
present on the DAC output. It is measured in dBs.
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.
CHANNEL-TO-CHANNEL ISOLATION
This is a ratio of the amplitude of the signal at the output of one
DAC to a sine wave on the reference input of the other DAC. It
is measured in dBs.
ACTUAL
IDEAL
GAIN ERROR
PLUS
OFFSET ERROR
OUTPUT
VOLTAGE
POSITIVE
OFFSET
ERROR
DAC CODE
NEGATIVE
OFFSET
ERROR
AMPLIFIER
FOOTROOM
(1mV)
DEADBAND
Figure 2. Transfer Function with Negative Offset
OUTPUT
VOLTAGE
POSITIVE
OFFSET
ERROR
DAC CODE
GAIN ERROR
PLUS
OFFSET ERROR
ACTUAL
IDEAL
Figure 3. Transfer Function with Positive Offset
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| AD5323 | 12-bit, 210MSPS ADC with DDR LVDS/CMOS outputs 48-VQFN -40 to 85 |
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