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5962-89728022A 参数 Datasheet PDF下载

5962-89728022A图片预览
型号: 5962-89728022A
PDF下载: 下载PDF文件 查看货源
内容描述: [Multiple Output, High Precision, Dual Tracking Reference]
分类和应用:
文件页数/大小: 20 页 / 577 K
品牌: ADI [ ADI ]
 浏览型号5962-89728022A的Datasheet PDF文件第2页浏览型号5962-89728022A的Datasheet PDF文件第3页浏览型号5962-89728022A的Datasheet PDF文件第4页浏览型号5962-89728022A的Datasheet PDF文件第5页浏览型号5962-89728022A的Datasheet PDF文件第7页浏览型号5962-89728022A的Datasheet PDF文件第8页浏览型号5962-89728022A的Datasheet PDF文件第9页浏览型号5962-89728022A的Datasheet PDF文件第10页  
AD588  
Data Sheet  
THEORY OF OPERATION  
The AD588 consists of a buried Zener diode reference,  
amplifiers used to provide pin programmable output ranges,  
and associated thin-film resistors, as shown in Figure 3. The  
temperature compensation circuitry provides the device with a  
temperature coefficient of 1.5 ppm/°C or less.  
Ground sensing for the circuit is provided by Amplifier A2. The  
noninverting input (Pin 9) senses the system ground, which is  
transferred to the point on the circuit where the inverting input  
(Pin 10) is connected. This can be Pin 6, Pin 8, or Pin 11. The  
output of A2 drives Pin 8 to the appropriate voltage. Thus, if  
Pin 10 is connected to Pin 8, the VLOW pin is the same voltage as  
the system ground. Alternatively, if Pin 10 is connected to the  
Amplifier A1 performs several functions. A1 primarily acts to  
amplify the Zener voltage from 6.5 V to the required 10 V output.  
In addition, A1 provides for external adjustment of the 10 V output  
through Pin 5, GAIN ADJ. Using the bias compensation resistor  
between the Zener output and the noninverting input to A1, a  
capacitor can be added at the NOISE REDUCTION pin (Pin 7)  
to form a low-pass filter and reduce the noise contribution of the  
Zener to the circuit. Two matched 10 kΩ nominal thin-film  
resistors (R4 and R5) divide the 10 V output in half. Pin VCT  
(Pin 11) provides access to the center of the voltage span and  
BAL ADJ (Pin 12) can be used for fine adjustment of this  
division.  
VCT pin, it is a ground; and Pin 6 and Pin 8 are +5 V and −5 V,  
respectively.  
Amplifier A3 and Amplifier A4 are internally compensated and  
are used to buffer the voltages at Pin 6, Pin 8, and Pin 11, as well  
as to provide a full Kelvin output. Thus, the AD588 has a full  
Kelvin capability by providing the means to sense a system  
ground and provide forced and sensed outputs referenced to  
that ground.  
Note that both positive and negative supplies are required for  
operation of the AD588.  
NOISE  
REDUCTION  
A3 OUT  
SENSE  
V
HIGH  
A3 IN  
4
7
6
3
A3 OUT  
FORCE  
A3  
1
R
B
A1  
R1  
A4 OUT  
SENSE  
14  
15  
R4  
R5  
A4 OUT  
FORCE  
A4  
R2  
+V  
S
2
R6  
R3  
AD588  
A2  
16 –V  
S
5
9
10  
8
12  
11  
13  
GAIN  
ADJ  
GND  
SENSE SENSE  
+IN –IN  
GND  
V
BAL  
ADJ  
V
A4 IN  
LOW  
CT  
Figure 3. AD588 Functional Block Diagram  
Rev. M | Page 6 of 20