參數(shù)資料
型號(hào)： AD9146BCPZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 7/56頁(yè)
文件大小： 0K
描述： IC DAC 16BIT SRL DUAL 48LFCSP
標(biāo)準(zhǔn)包裝： 1
系列： TxDAC+®
設(shè)置時(shí)間： 20ns
位數(shù)： 16
數(shù)據(jù)接口： 串行
轉(zhuǎn)換器數(shù)目： 2
電壓電源： 模擬和數(shù)字
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 48-WFQFN 裸露焊盤(pán)，CSP
供應(yīng)商設(shè)備封裝： 48-LFCSP-WQ（7x7）
包裝： 托盤(pán)
輸出數(shù)目和類型： 2 電流，單極
采樣率（每秒）： 1.23G
Data Sheet
AD9146
Rev. A | Page 15 of 56
TERMINOLOGY
Integral Nonlinearity (INL)
INL is the maximum deviation of the actual analog output from
the ideal output, determined by a straight line drawn from zero
scale to full scale.
Differential Nonlinearity (DNL)
DNL is the measure of the variation in analog value, normalized
to full scale, associated with a 1 LSB change in digital input code.
Offset Error
Offset error is the deviation of the output current from the ideal
of 0 mA. For IOUT1P, 0 mA output is expected when all inputs
are set to 0. For IOUT1N, 0 mA output is expected when all
inputs are set to 1.
Gain Error
Gain error is the difference between the actual and ideal output
span. The actual span is determined by the difference between
the output when all inputs are set to 1 and the output when all
inputs are set to 0.
Output Compliance Range
The output compliance range is the range of allowable voltage
at the output of a current output DAC. Operation beyond the
maximum compliance limits can cause either output stage
saturation or breakdown, resulting in nonlinear performance.
Temperature Drift
Temperature drift is specified as the maximum change from
the ambient (25°C) value to the value at either TMIN or TMAX.
For offset and gain drift, the drift is reported in ppm of full-scale
range (FSR) per degree Celsius. For reference voltage drift, the
drift is reported in ppm per degree Celsius.
Power Supply Rejection (PSR)
PSR is the maximum change in the full-scale output as the
supplies are varied from minimum to maximum specified
voltages.
Settling Time
Settling time is the time required for the output to reach and
remain within a specified error band around its final value,
measured from the start of the output transition.
Spurious-Free Dynamic Range (SFDR)
SFDR is the difference, in decibels, between the peak amplitude
of the output signal and the peak spurious signal within the dc
to Nyquist frequency of the DAC. Typically, energy in this band
is rejected by the interpolation filters. This specification, there-
fore, defines how well the interpolation filters work and the
effect of other parasitic coupling paths on the DAC output.
Signal-to-Noise Ratio (SNR)
SNR is the ratio of the rms value of the measured output signal
to the rms sum of all other spectral components below the Nyquist
frequency, excluding the first six harmonics and dc. The value
for SNR is expressed in decibels.
Interpolation Filter
If the digital inputs to the DAC are sampled at a multiple rate of
fDATA (interpolation rate), a digital filter can be constructed that
has a sharp transition band near fDATA/2. Images that typically
appear around fDAC (output data rate) can be greatly suppressed.
Adjacent Channel Leakage Ratio (ACLR)
ACLR is the ratio in decibels relative to the carrier (dBc) between
the measured power within a channel and that of its adjacent
channel.
Complex Image Rejection
In a traditional two-part upconversion, two images are created
around the second IF frequency. These images have the effect
of wasting transmitter power and system bandwidth. By placing
the real part of a second complex modulator in series with the
first complex modulator, either the upper or lower frequency
image near the second IF can be rejected.
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