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| 型号： | EVAL-AD5590EBZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 16/44页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR AD5590 |
| 标准包装： | 1 |
| ADC 的数量： | 1 |
| 位数： | 12 |
| 采样率（每秒）： | 1M |
| 数据接口： | 串行 |
| 输入范围： | 2 Vpp |
| 在以下条件下的电源（标准）： | 12.5mW @ 1MSPS，5V |
| 工作温度： | -40°C ~ 85°C |
| 已用 IC / 零件： | AD5590 |
| 已供物品： | 板 |
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AD5590
Rev. A | Page 23 of 44
TERMINOLOGY
DAC Integrated Nonlinearity
For the DAC, relative accuracy, or integral nonlinearity (INL),
is a measure of the maximum deviation in LSBs from a straight
line passing through the endpoints of the DAC transfer function.
DAC 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. The DAC is guaranteed
monotonic by design.
DAC Offset Error
Offset error is a measure of the difference between the actual
VOUT and the ideal VOUT, expressed in millivolts in the linear
region of the transfer function. It can be negative or positive
and is expressed in millivolts.
DAC Zero-Code Error
Zero-code error is a measure of the output error when zero
code (0x0000) is loaded into the DAC register. Ideally, the
output should be 0 V. The zero-code error is always positive
because the output of the DAC cannot go below 0 V. It is due
to a combination of the offset errors in the DAC and output
amplifier. Zero-code error is expressed in millivolts.
DAC Gain Error
Gain error is a measure of the span error of the DAC. It is the
deviation in slope of the DAC transfer characteristic from the
ideal, expressed as a percentage of the full-scale range.
DAC Zero-Code Error Drift
Zero-code error drift is a measure of the change in zero-code
error with a change in temperature. It is expressed in microvolts
per degree Celsius.
DAC Gain Error Drift
Gain error drift is a measure of the change in gain error with
changes in temperature. It is expressed in ppm of full-scale
range per degree Celsius.
DAC Full-Scale Error
Full-scale error is a measure of the output error when full-scale
code (0xFFFF) is loaded into the DAC register. Ideally, the out-
put should be VDD 1 LSB. Full-scale error is expressed as a
percentage of the full-scale range. Figure 10 shows a plot of
typical full-scale error vs. temperature.
DAC Digital-to-Analog Glitch Impulse
Digital-to-analog glitch impulse is the impulse injected into the
analog output when the input code in the DAC register changes
state. It is normally specified as the area of the glitch in nV-sec
and is measured when the digital input code is changed by 1
LSB at the major carry transition (0x7FFF to 0x8000).
DAC DC Power Supply Rejection Ratio (PSRR)
PSRR 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 DACVDD for full-scale output of the DAC. It is
measured in decibels. VREFIN is held at 2 V, and DACVDD is
varied ±10%.
DAC DC Crosstalk
DC crosstalk 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 (or
soft power-down and power-up) while monitoring another
DAC kept at midscale. It is expressed in microvolts.
DC crosstalk due to load current change is a measure of the
impact that a change in load current on one DAC has to
another DAC kept at midscale. It is expressed in microvolts
per milliamp.
Reference Feedthrough
Reference feedthrough is the ratio of the amplitude of the signal
at the DAC output to the reference input when the DAC output
is not being updated (that is, LDAC is high). It is expressed in
decibels.
DAC 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-sec and measured with
a full-scale change on the digital input pins, that is, from all 0s
to all 1s or vice versa.
DAC Digital Crosstalk
Digital crosstalk 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 or vice versa) in the input register of another
DAC. It is measured in standalone mode and is expressed in
nV-sec.
DAC Analog Crosstalk
Analog crosstalk 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 or vice versa) while keeping LDAC
high, and then pulsing LDAC low and monitoring the output
of the DAC whose digital code has not changed. The area of the
glitch is expressed in nV-sec.
DAC-to-DAC Crosstalk
DAC-to-DAC crosstalk 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 or vice versa) with LDAC
low and monitoring the output of another DAC. The energy of
the glitch is expressed in nV-sec.
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