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AD538ACHIPS

更新时间： 2024-02-28 21:55:18
品牌 Logo 应用领域
亚德诺 - ADI 模拟计算功能信号电路
页数 文件大小 规格书
11页 170K
描述
Real-Time Analog Computational Unit ACU

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AD538ACHIPS 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Active零件包装代码：DIP
包装说明：DIP, DIP18,.3针数：18
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.15
模拟集成电路 - 其他类型：ANALOG MULTIPLE FUNCTIONS标称带宽：0.4 MHz
JESD-30 代码：R-CDIP-T18JESD-609代码：e0
长度：22.865 mm负电源电压最大值（Vsup）：-18 V
负电源电压最小值（Vsup）：-4.5 V标称负供电电压 (Vsup)：-15 V
最大负输入电压：功能数量：1
端子数量：18最高工作温度：125 °C
最低工作温度：-55 °C封装主体材料：CERAMIC, METAL-SEALED COFIRED
封装代码：DIP封装等效代码：DIP18,.3
封装形状：RECTANGULAR封装形式：IN-LINE
峰值回流温度（摄氏度）：NOT SPECIFIED最大正输入电压：10 V
电源：+-15 V认证状态：Not Qualified
座面最大高度：4.32 mm子类别：Analog Computational Functions
最大供电电流 (Isup)：7 mA最大供电电压 (Vsup)：18 V
最小供电电压 (Vsup)：4.5 V标称供电电压 (Vsup)：15 V
表面贴装：NO技术：BIPOLAR
温度等级：MILITARY端子面层：Tin/Lead (Sn/Pb)
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：NOT SPECIFIED
宽度：7.62 mmBase Number Matches：1

AD538ACHIPS 数据手册

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Real-Time Analog  
a
Computational Unit (ACU)  
AD538  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
m
VZ  
VOUT = VY  
Transfer Function  
VX  
1
2
3
4
5
6
7
8
9
18  
17  
16  
15  
14  
13  
12  
11  
10  
I
A
D
Z
Wide Dynamic Range (Denominator) –1000:1  
Simultaneous Multiplication and Division  
Resistor-Programmable Powers and Roots  
No External Trims Required  
LOG  
25k⍀  
RATIO  
V
Z
B
+10V  
+2V  
I
X
Low Input Offsets <100 ␮V  
V
X
Low Error ؎0.25% of Reading (100:1 Range)  
+2 V and +10 V On-Chip References  
Monolithic Construction  
25k⍀  
100⍀  
100⍀  
SIGNAL  
GND  
INTERNAL  
VOLTAGE  
PWR  
GND  
+V  
S
S
REFERENCE  
AD538  
APPLICATIONS  
One- or Two-Quadrant Mult/Div  
Log Ratio Computation  
Squaring/Square Rooting  
Trigonometric Function Approximations  
Linearization Via Curve Fitting  
Precision AGC  
–V  
C
OUTPUT  
25k⍀  
V
I
Y
O
ANTILOG  
I
V
LOG  
Y
25k⍀  
Power Functions  
PRODUCT DESCRIPTION  
Direct log ratio computation is possible by using only the log  
ratio and output sections of the chip. Access to the multiple  
summing junctions adds further to the AD538’s flexibility.  
Finally, a wide power supply range of ±4.5 V to ±18 V allows  
operation from standard ±5 V, ±12 V and ±15 V supplies.  
The AD538 is a monolithic real-time computational circuit that  
provides precision analog multiplication, division and exponen-  
tiation. The combination of low input and output offset voltages  
and excellent linearity results in accurate computation over an  
unusually wide input dynamic range. Laser wafer trimming makes  
multiplication and division with errors as low as 0.25% of read-  
ing possible, while typical output offsets of 100 µV or less add to  
the overall off-the-shelf performance level. Real-time analog  
signal processing is further enhanced by the device’s 400 kHz  
bandwidth.  
The AD538 is available in two accuracy grades (A and B) over  
the industrial (–25°C to +85°C) temperature range and one  
grade (S) over the military (–55°C to +125°C) temperature  
range. The device is packaged in an 18-lead TO-118 hermetic  
side-brazed ceramic DIP. A-grade chips are also available.  
The AD538’s overall transfer function is VO = VY (VZ/VX)m.  
Programming a particular function is via pin strapping. No  
external components are required for one-quadrant (positive  
input) multiplication and division. Two-quadrant (bipolar  
numerator) division is possible with the use of external level  
shifting and scaling resistors. The desired scale factor for both  
multiplication and division can be set using the on-chip +2 V or  
+10 V references, or controlled externally to provide simulta-  
neous multiplication and division. Exponentiation with an m  
value from 0.2 to 5 can be implemented with the addition of  
one or two external resistors.  
PRODUCT HIGHLIGHTS  
1. Real-time analog multiplication, division and exponentiation.  
2. High accuracy analog division with a wide input dynamic  
range.  
3. On-chip +2 V or +10 V scaling reference voltages.  
4. Both voltage and current (summing) input modes.  
5. Monolithic construction with lower cost and higher reliability  
than hybrid and modular circuits.  
REV. C  
Information furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assumed by Analog Devices for its  
use, nor for any infringements of patents or other rights of third parties  
which may result from its use. No license is granted by implication or  
otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781/329-4700  
Fax: 781/326-8703  
World Wide Web Site: http://www.analog.com  
© Analog Devices, Inc., 1999  
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