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AD780SQ/883B PDF预览

AD780SQ/883B

更新时间： 2024-11-01 20:03:15
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亚德诺 - ADI 输出元件
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12页 268K
描述
1-OUTPUT THREE TERM VOLTAGE REFERENCE, 2.5V, CDIP8, CERDIP-8

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AD780SQ/883B 数据手册

 浏览型号AD780SQ/883B的Datasheet PDF文件第2页浏览型号AD780SQ/883B的Datasheet PDF文件第3页浏览型号AD780SQ/883B的Datasheet PDF文件第4页浏览型号AD780SQ/883B的Datasheet PDF文件第5页浏览型号AD780SQ/883B的Datasheet PDF文件第6页浏览型号AD780SQ/883B的Datasheet PDF文件第7页 
2.5 V/3.0 V  
High Precision Reference  
Data Sheet  
AD780  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
+V  
NC  
Pin programmable 2.5 V or 3.0 V output  
Ultralow drift: 3 ppm/°C max  
High accuracy: 2.5 V or 3.0 V 1 mV max  
IN  
2
7
AD780  
Low noise: 100 nV/√  
Hz  
R10  
R11  
Q7  
Noise reduction capability  
Low quiescent current: 1 mA max  
Output trim capability  
Plug-in upgrade for present references  
Temperature output pin  
Series or shunt mode operation ( 2.5 V, 3.0 V)  
1
NC  
6
5
V
OUT  
R13  
Q6  
R16  
TRIM  
R5  
R4  
R14  
TEMP  
3
R15  
4
8
O/P SELECT  
2.5V – NC  
3.0V – GND  
GND  
NC = NO CONNECT  
Figure 1.  
PRODUCT DESCRIPTION  
The AD780 is a pin compatible performance upgrade for the  
LT1019(A)–2.5 and the AD680. The latter is targeted toward  
low power applications.  
The AD780 is an ultrahigh precision band gap reference voltage  
that provides a 2.5 V or 3.0 V output from inputs between 4.0 V  
and 36 V. Low initial error and temperature drift combined with  
low output noise and the ability to drive any value of  
capacitance make the AD780 the ideal choice for enhancing the  
performance of high resolution ADCs and DACs, and for any  
general-purpose precision reference application. A unique low  
headroom design facilitates a 3.0 V output from a 5.0 V 10%  
input, providing a 20% boost to the dynamic range of an ADC  
over performance with existing 2.5 V references.  
The AD780 is available in three grades in PDIP and SOIC  
packages. The AD780AN, AD780AR, AD780BN, AD780BR,  
and AD780CR are specified for operation from −40°C to  
+85°C.  
PRODUCT HIGHLIGHTS  
1. The AD780 provides a pin programmable 2.5 V or 3.0 V  
output from a 4 V to 36 V input.  
The AD780 can be used to source or sink up to 10 mA, and can  
be used in series or shunt mode, thus allowing positive or  
negative output voltages without external components. This  
makes it suitable for virtually any high performance reference  
application. Unlike some competing references, the AD780 has  
no region of possible instability. The part is stable under all load  
conditions when a 1 µF bypass capacitor is used on the supply.  
2. Laser trimming of both initial accuracy and temperature  
coefficients results in low errors over temperature without  
the use of external components. The AD780BN has a  
maximum variation of 0.9 mV from −40°C to +85°C.  
3. For applications that require even higher accuracy, an  
optional fine-trim connection is provided.  
4. The AD780 noise is extremely low, typically 4 mV p-p from  
0.1 Hz to 10 Hz and a wideband spectral noise density of  
A temperature output pin on the AD780 provides an output  
voltage that varies linearly with temperature, allowing the part  
to be configured as a temperature transducer while providing a  
stable 2.5 V or 3.0 V output.  
typically 100 nV/√ . This can be further reduced, if  
Hz  
desired, by using two external capacitors.  
5. The temperature output pin enables the AD780 to be  
configured as a temperature transducer while providing a  
stable output reference.  
Rev. F  
Document Feedback  
Information furnishedby Analog Devices is believedto be accurate andreliable. However, no  
responsibilityisassumedbyAnalog Devices for its use, nor for anyinfringements of patents or other  
rights of third partiesthat may result from its use. Specifications subject to change without notice. No  
license isgrantedbyimplication or otherwise under anypatent or patent rights of Analog Devices.  
Trademarks andregisteredtrademarks are the property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Technical Support  
©2012 Analog Devices, Inc. All rights reserved.  
www.analog.com  
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