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參數(shù)資料
| 型號： | AD5504BRUZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 4/20頁 |
| 文件大小： | 0K |
| 描述： | IC DAC 12BIT SPI 16-TSSOP |
| 產(chǎn)品培訓(xùn)模塊： | DAC Architectures |
| 設(shè)計(jì)資源： | Powering a 30V DAC from a 3V supply (CN0193) |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 設(shè)置時(shí)間： | 45µs |
| 位數(shù)： | 12 |
| 數(shù)據(jù)接口： | SPI?、QSPI?、MICROWIRE? 和 DSP |
| 轉(zhuǎn)換器數(shù)目： | 4 |
| 電壓電源： | 單 |
| 工作溫度： | -40°C ~ 105°C |
| 安裝類型： | * |
| 封裝/外殼： | 16-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | * |
| 包裝： | 管件 |
| 輸出數(shù)目和類型： | 4 電壓，單極 |
| 采樣率（每秒）： | * |
AD5504
Data Sheet
Rev. B | Page 12 of 20
TERMINOLOGY
Relative Accuracy
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.
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 mono-
tonic by design.
Zero-Code Error
Zero-code error is a measure of the output error when zero
code (0x000) is loaded into the DAC register. Ideally, the output
should be 0 V. The zero-code error is always positive in the
AD5504 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.
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 μV/°C.
Offset Error
A measure of the difference between VOUT (actual) and VOUT
(ideal) expressed in millivolts in the linear region of the transfer
function. Offset error is measured on the AD5504 with Code 32
loaded in the DAC registers for 60 V mode and with Code 64
loaded in the DAC registers for 30 V mode. Offset error is
expressed in millivolts.
Offset Error Drift
Offset error drift is a measure of the change in offset error with
a change in temperature. It is expressed in μV/°C.
Full-Scale Error
Full-scale error is a measure of the output error when full-scale
code (0xFFF) is loaded into the DAC register. Full-scale error is
expressed in millivolts.
Full-Scale Error Drift
Full-scale error drift is a measure of the change in full-scale
error with a change in temperature. It is expressed in μV/°C.
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.
Gain Temperature Coefficient
The gain temperature coefficient is a measure of the change in
gain with changes in temperature. It is expressed in (ppm of
full-scale range)/°C.
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-s
and is measured when the digital input code is changed by
1 LSB at the major carry transition.
DC and AC 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 VOUTA,
VOUTB, VOUTC, or VOUTD to a change in VDD for full-scale output of
the DAC. It is measured in decibels. For dc PSRR, VDD is dc
varied ±10%. For ac PSRR, VDD is ac varied ±10%.
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 millivolts.
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 μV/mA.
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 measured with a
full-scale change on the digital input pins, that is, from all 0s to
all 1s or vice versa.
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-s.
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