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AD1862N

更新时间： 2024-02-19 16:27:47
品牌 Logo 应用领域
亚德诺 - ADI 转换器数模转换器光电二极管信息通信管理PC
页数 文件大小 规格书
12页 186K
描述
Ultralow Noise 20-Bit Audio DAC

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AD1862N 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：DIP包装说明：PLASTIC, DIP-16
针数：16Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.82Is Samacsys：N
转换器类型：D/A CONVERTER输入位码：2'S COMPLEMENT BINARY
输入格式：SERIALJESD-30 代码：R-PDIP-T16
JESD-609代码：e0长度：20.13 mm
标称负供电电压：-12 V位数：20
功能数量：1端子数量：16
最高工作温度：70 °C最低工作温度：-25 °C
封装主体材料：PLASTIC/EPOXY封装代码：DIP
封装等效代码：DIP16,.3封装形状：RECTANGULAR
封装形式：IN-LINE峰值回流温度（摄氏度）：240
电源：+-12 V认证状态：Not Qualified
座面最大高度：5.33 mm标称安定时间 (tstl)：0.35 µs
子类别：Other Converters最大压摆率：16 mA
标称供电电压：12 V表面贴装：NO
技术：BICMOS温度等级：OTHER
端子面层：TIN LEAD端子形式：THROUGH-HOLE
端子节距：2.54 mm端子位置：DUAL
处于峰值回流温度下的最长时间：30宽度：7.62 mm
Base Number Matches：1

AD1862N 数据手册

 浏览型号AD1862N的Datasheet PDF文件第4页浏览型号AD1862N的Datasheet PDF文件第5页浏览型号AD1862N的Datasheet PDF文件第6页浏览型号AD1862N的Datasheet PDF文件第8页浏览型号AD1862N的Datasheet PDF文件第9页浏览型号AD1862N的Datasheet PDF文件第10页 
Testing the AD1862  
TO TAL H ARMO NIC D ISTO RTIO N + NO ISE  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
T he T HD figure of an audio DAC represents the amount of un-  
desirable signal produced during reconstruction and playback of  
an audio waveform. T he T HD specification, therefore, provides  
a direct method to classify and choose an audio DAC for a de-  
sired level of performance.  
AD1862  
TOP VIEW  
(Not to Scale) 12  
11  
10  
9
By combining noise measurement with the T HD measurement,  
a T HD+N specification is realized. T his specification indicates  
all of the undesirable signal produced by the DAC, including  
harmonic products of the test tone as well as noise.  
VOUT  
Figure 9. External Am plifier Connections  
Analog Devices tests all AD1862s on the basis of T HD+N per-  
formance. In this test procedure, a digital data stream represent-  
ing a 0 dB, –20 dB or –60 dB sine wave is sent to the device  
under test. T he frequency of the waveform is 990.5 Hz. Input  
data is sent to the AD1862 at an 8 × FS rate (352.8 kHz). T he  
AD1862 under test produces an output current which is con-  
verted to an output voltage by an external amplifier. Figure 10  
illustrates the recommended test circuit. Deglitchers and trims  
are not used during this test procedure. T he automatic test  
equipment digitizes 4096 samples of the output test waveform,  
incorporating 23 complete cycles of the sine wave. A 4096 point  
FFT is performed on the test data.  
Based upon the harmonics of the fundamental 990.5 Hz test  
tone, and the noise components in the audio band, the total har-  
monic distortion + noise of the device is calculated. T he  
AD1862 is available in two performance grades. T he AD1862N  
produces a maximum of 0.0025% T HD+N at 0 dB signal lev-  
els. T he higher performance AD1862N-J produces a maximum  
of 0.0016% T HD+N at 0 dB signal levels.  
SIGNAL-TO -NO ISE RATIO  
T he Signal-to-Noise Ratio (SNR) of the AD1862 is tested in the  
following manner. T he amplitude of a 0 dB signal is measured.  
T he device under test is then set to midscale output voltage (0  
volts). T he amplitude of all noise present to 30 kHz is mea-  
sured. T he SNR is the ratio of these two measurements. T he  
SNR figure for the AD1862 includes the output noise contrib-  
uted by the NE5534 op amp used in the test fixture but does  
not include the noise contributed by the low-pass filter used in  
the test fixture.  
T he AD1862N has a minimum SNR of 110 dB. T he higher  
performance AD1862N-J has a minimum SNR of 113 dB.  
12V  
0.1µF  
1
16  
1µF  
0.1µF  
+
–12V  
12V  
2
3
4
5
6
7
8
15  
14  
13  
10µF  
+
AD1862  
TOP VIEW  
ANALOG  
COMMON  
0.1µF  
0.1µF  
SE5534A  
17MHz  
(Not to Scale) 12  
352.8kHz  
11  
10  
9
3-POLE  
LOW PASS  
FILTER  
360pF  
OUTPUT  
VOLTAGE  
DIGITAL  
COMMON  
–
12V  
Figure 10. Recom m ended Test Circuit  
REV. A  
–7–  
1...45678910...12

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