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AD586JRZ-REEL71 参数 Datasheet PDF下载

AD586JRZ-REEL71图片预览
型号: AD586JRZ-REEL71
PDF下载: 下载PDF文件 查看货源
内容描述: 高精度5 V基准 [High Precision 5 V Reference]
分类和应用:
文件页数/大小: 16 页 / 479 K
品牌: ADI [ ADI ]
 浏览型号AD586JRZ-REEL71的Datasheet PDF文件第7页浏览型号AD586JRZ-REEL71的Datasheet PDF文件第8页浏览型号AD586JRZ-REEL71的Datasheet PDF文件第9页浏览型号AD586JRZ-REEL71的Datasheet PDF文件第10页浏览型号AD586JRZ-REEL71的Datasheet PDF文件第12页浏览型号AD586JRZ-REEL71的Datasheet PDF文件第13页浏览型号AD586JRZ-REEL71的Datasheet PDF文件第14页浏览型号AD586JRZ-REEL71的Datasheet PDF文件第15页  
AD586  
22V TO 46V  
2
5 V REFERENCE WITH MULTIPLYING  
CMOS DACs OR ADCs  
V
IN  
The AD586 is ideal for applications with 10- and 12-bit  
multiplying CMOS DACs. In the standard hookup, as shown  
in Figure 20, the AD586 is paired with the AD7545 12-bit  
multiplying DAC and the AD711 high speed BiFET op amp.  
The amplifier DAC configuration produces a unipolar 0 V to  
−5 V output range. Bipolar output applications and other  
operating details can be found in the individual product data  
sheets.  
6
5
V
15V  
OUT  
TRIM  
GND  
AD586  
10kΩ  
4
2
V
IN  
6
5
V
10V  
5V  
OUT  
AD586  
10kΩ  
TRIM  
R2  
68  
+15V  
+15V  
GND  
2
4
V
+15V  
0.1µF  
IN  
2
C1  
33pF  
6
5
V
18  
20  
V
IN  
OUT  
TRIM  
GND  
AD586  
R
V
FB  
DD  
AD586  
10kΩ  
7
1
2
2
OUT 1  
6
5
19  
V
V
REF  
OUT  
V
AD711K  
4
6
OUT  
0V TO5V  
4
3
10kΩ  
AGND  
TRIM  
AD7545K  
0.1µF  
DGND  
3
GND  
4
Figure 22. Multiple AD586s Stacked for Precision 5 V, 10 V, and 15 V Outputs  
DB11TODB0  
–15V  
PRECISION CURRENT SOURCE  
Figure 20. Low Power 12-Bit CMOS DAC Application  
The design of the AD586 allows it to be easily configured as a  
current source. By choosing the control resistor RC in Figure 23,  
the user can vary the load current from the quiescent current  
(typically, 2 mA) to approximately 10 mA. The compliance volt-  
age of this circuit varies from about 5 V to 21 V, depending on  
the value of VIN.  
The AD586 can also be used as a precision reference for multi-  
ple DACs. Figure 21 shows the AD586, the AD7628 dual DAC,  
and the AD712 dual op amp hooked up for single-supply opera-  
tion to produce 0 V to −5 V outputs. Because both DACs are on  
the same die and share a common reference and output op  
amps, the DAC outputs will exhibit similar gain TCs.  
+V  
IN  
+15V  
+15V  
2
2
17  
3
V
IN  
V
IN  
RFB A  
V
A
5V  
REF  
OUT A  
6
I
=
+ I  
BIAS  
V
V
AD586  
2
6
4
L
OUT  
OUT  
R
C
R
DAC A  
C
V
A=  
(500MIN)  
OUT  
0TO5V  
GND  
4
AD586  
AGND  
RFB B  
14  
7
1
DB0  
DATA  
INPUTS  
GND  
4
AD7628  
AD712  
DB7  
19  
20  
OUT B  
Figure 23. Precision Current Source  
4
V
B
DAC B  
REF  
V
B=  
OUT  
0TO5V  
PRECISION HIGH CURRENT SUPPLY  
DGND  
5
For higher currents, the AD586 can easily be connected to a  
power PNP or power Darlington PNP device. The circuit in  
Figure 24 and Figure 25 can deliver up to 4 amps to the load.  
The 0.1 µF capacitor is required only if the load has a significant  
capacitive component. If the load is purely resistive, improved  
high frequency supply rejection results can be obtained by  
removing the capacitor.  
Figure 21. AD586 as a 5 V Reference for a CMOS  
STACKED PRECISION REFERENCES FOR  
MULTIPLE VOLTAGES  
Often, a design requires several reference voltages. Three  
AD586s can be stacked, as shown in Figure 22, to produce  
5.000 V, 10.000 V, and 15.000 V outputs. This scheme can be  
extended to any number of AD586s, provided the maximum  
load current is not exceeded. This design provides the addi-  
tional advantage of improved line regulation on the 5.0 V  
output. Changes in VIN of 18 V to 50 V produce output changes  
that are below the noise level of the references.  
Rev. G | Page 11 of 16