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AD737KR-REEL7 PDF预览

AD737KR-REEL7

更新时间： 2024-01-19 04:33:12
品牌 Logo 应用领域
亚德诺 - ADI 转换器模拟特殊功能转换器光电二极管
页数 文件大小 规格书
8页 152K
描述
Low Cost, Low Power, True RMS-to-DC Converter

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AD737KR-REEL7 技术参数

Source Url Status Check Date：2013-05-01 14:56:17.758是否无铅： 含铅
是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：SOIC包装说明：SOP, SOP8,.25
针数：8Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5Is Samacsys：N
转换器类型：RMS TO DC CONVERTERJESD-30 代码：R-PDSO-G8
JESD-609代码：e0长度：4.9 mm
最大线性误差 (EL)：0.35%湿度敏感等级：1
最大负电源电压：-16.5 V最小负电源电压：-3.2 V
标称负供电电压：-5 V功能数量：1
端子数量：8最大工作频率：0.005 MHz
最高工作温度：70 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装等效代码：SOP8,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE峰值回流温度（摄氏度）：240
最大正输入电压：1 V电源：+-5 V
认证状态：Not Qualified座面最大高度：1.75 mm
子类别：Analog Special Function Converters最大压摆率：0.21 mA
最大供电电压：16.5 V最小供电电压：2.8 V
标称供电电压：5 V表面贴装：YES
技术：BIPOLAR温度等级：COMMERCIAL
端子面层：Tin/Lead (Sn85Pb15)端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
处于峰值回流温度下的最长时间：30最大总误差：2%
宽度：3.9 mmBase Number Matches：1

AD737KR-REEL7 数据手册

 浏览型号AD737KR-REEL7的Datasheet PDF文件第2页浏览型号AD737KR-REEL7的Datasheet PDF文件第3页浏览型号AD737KR-REEL7的Datasheet PDF文件第4页浏览型号AD737KR-REEL7的Datasheet PDF文件第5页浏览型号AD737KR-REEL7的Datasheet PDF文件第6页浏览型号AD737KR-REEL7的Datasheet PDF文件第7页 
Low Cost, Low Power,  
a
True RMS-to-DC Converter  
AD737*  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
COMPUTES  
True RMS Value  
Average Rectified Value  
Absolute Value  
AD737  
8k⍀  
C
1
2
3
4
8
7
6
5
COM  
C
FULL  
WAVE  
RECTIFIER  
PROVIDES  
+V  
S
V
200 mV Full-Scale Input Range  
(Larger Inputs with Input Attenuator)  
Direct Interfacing with 3 1/2 Digit  
CMOS A/D Converters  
IN  
8k⍀  
INPUT  
AMPLIFIER  
BIAS  
SECTION  
POWER  
DOWN  
OUTPUT  
RMS CORE  
High Input Impedance of 1012  
⍀
C
Low Input Bias Current: 25 pA max  
–V  
S
AV  
High Accuracy: ؎0.2 mV ؎0.3% of Reading  
RMS Conversion with Signal Crest Factors Up to 5  
Wide Power Supply Range: +2.8 V, –3.2 V to ؎16.5 V  
Low Power: 160 ␮A max Supply Current  
No External Trims Needed for Specified Accuracy  
AD736—A General Purpose, Buffered Voltage  
Output Version Also Available  
PRODUCT DESCRIPTION  
The AD737 allows the choice of two signal input terminals: a  
high impedance (1012 Ω) FET input which will directly interface  
with high Z input attenuators and a low impedance (8 kΩ) input  
which allows the measurement of 300 mV input levels, while  
operating from the minimum power supply voltage of +2.8 V,  
–3.2 V. The two inputs may be used either singly or differentially.  
The AD737 is a low power, precision, monolithic true rms-to-dc  
converter. It is laser trimmed to provide a maximum error of  
±0.2 mV ±0.3% of reading with sine-wave inputs. Furthermore,  
it maintains high accuracy while measuring a wide range of  
input waveforms, including variable duty cycle pulses and triac  
(phase) controlled sine waves. The low cost and small physical  
size of this converter make it suitable for upgrading the per-  
formance of non-rms “precision rectifiers” in many applications.  
Compared to these circuits, the AD737 offers higher accuracy at  
equal or lower cost.  
The AD737 achieves a 1% of reading error bandwidth exceed-  
ing 10 kHz for input amplitudes from 20 mV rms to 200 mV  
rms while consuming only 0.72 mW.  
The AD737 is available in four performance grades. The  
AD737J and AD737K grades are rated over the commercial  
temperature range of 0°C to +70°C. The AD737A and AD737B  
grades are rated over the industrial temperature range of –40°C  
to +85°C.  
The AD737 can compute the rms value of both ac and dc input  
voltages. It can also be operated ac coupled by adding one ex-  
ternal capacitor. In this mode, the AD737 can resolve input sig-  
nal levels of 100 µV rms or less, despite variations in temperature  
or supply voltage. High accuracy is also maintained for input  
waveforms with crest factors of 1 to 3. In addition, crest factors  
as high as 5 can be measured (while introducing only 2.5%  
additional error) at the 200 mV full-scale input level.  
The AD737 is available in three low-cost, 8-lead packages: plas-  
tic DIP, plastic SO and hermetic cerdip.  
PRODUCT HIGHLIGHTS  
1. The AD737 is capable of computing the average rectified  
value, absolute value or true rms value of various input  
signals.  
The AD737 has no output buffer amplifier, thereby significantly  
reducing dc offset errors occuring at the output. This allows the  
device to be highly compatible with high input impedance A/D  
converters.  
2. Only one external component, an averaging capacitor, is  
required for the AD737 to perform true rms measurement.  
Requiring only 160 µA of power supply current, the AD737 is  
optimized for use in portable multimeters and other battery  
powered applications. This converter also provides a “power  
down” feature which reduces the power supply standby current  
to less than 30 µA.  
3. The low power consumption of 0.72 mW makes the AD737  
suitable for many battery powered applications.  
*Protected under U.S. Patent Number 5,495,245.  
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  
12345678

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