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AD637KD/+

更新时间： 2024-01-12 16:20:27
品牌 Logo 应用领域
其他 - ETC 转换器
页数 文件大小 规格书
16页 193K
描述
RMS-TO-DC CONVERTER

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AD637KD/+ 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：DIP包装说明：CERDIP-14
针数：14Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.08Is Samacsys：N
转换器类型：RMS TO DC CONVERTERJESD-30 代码：R-GDIP-T14
JESD-609代码：e0长度：19.43 mm
最大线性误差 (EL)：0.05%最大负电源电压：-18 V
最小负电源电压：-3 V标称负供电电压：-15 V
功能数量：1端子数量：14
最大工作频率：0.15 MHz最高工作温度：125 °C
最低工作温度：-55 °C封装主体材料：CERAMIC, GLASS-SEALED
封装代码：DIP封装等效代码：DIP14,.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：7 V
电源：+-15 V认证状态：Not Qualified
座面最大高度：5.08 mm子类别：Analog Special Function Converters
最大压摆率：3 mA最大供电电压：18 V
最小供电电压：3 V标称供电电压：15 V
表面贴装：NO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最大总误差：0.7%
宽度：7.62 mmBase Number Matches：1

AD637KD/+ 数据手册

 浏览型号AD637KD/+的Datasheet PDF文件第6页浏览型号AD637KD/+的Datasheet PDF文件第7页浏览型号AD637KD/+的Datasheet PDF文件第8页浏览型号AD637KD/+的Datasheet PDF文件第10页浏览型号AD637KD/+的Datasheet PDF文件第11页浏览型号AD637KD/+的Datasheet PDF文件第12页 
AD637  
100  
10  
100  
10  
VALUES OF C , C2 AND C3  
AV  
AND 1% SETTLING TIME FOR  
STATED % OF READING  
AVERAGING ERROR*  
10  
1
7V RMS INPUT  
2V RMS INPUT  
1V RMS INPUT  
2 POLL SALLEN-KEY FILTER  
*%dc ERROR + % PEAK RIPPLE  
ACCURACY ꢂ20% DUE TO  
COMPONENT TOLERANCE  
1%  
0.01% ERROR  
10%  
ꢂ3dB  
1.0  
1.0  
0.1% ERR  
100mV RMS INPUT  
100mV RMS INPUT  
0.1  
0.01  
1% ERRR  
5% ERR
0.1  
0.1  
1k  
10k  
100k  
INPUT FREQUENCY – Hz  
1M  
10M  
0.01  
100k  
0.01  
1
10  
100  
1k  
10k  
INPUT FREQUENCY – Hz  
Figure 10. Frequency Response  
Figure 9c.  
AC MEASUREMENT ACCURACY AND CREST FACTOR  
Crest factor is often overlooked in determining the accuracy of  
an ac measurement. Crest factor is defined as the ratio of the  
peak signal amplitude to the rms value of the signal (CF =  
Vp/V rms). Most common waveforms, such as sine and triangle  
waves, have relatively low crest factors (≤2). Waveforms that  
resemble low duty cycle pulse trains, such as those occurring in  
switching power supplies and SCR circuits, have high crest  
factors. For example, a rectangular pulse train with a 1% duty  
Table I. Practical Values of CAV and C2 for Various Input  
Waveforms  
Recommended CAV and C2  
Values for 1% Averaging  
Error@60Hz with T = 16.6ms  
Recommended Recommended  
Minimum  
Absolute Value  
Circuit Waveform  
and Period  
Input Waveform  
and Period  
R ꢄ CAV  
Time  
1%  
Settling  
Time  
Standard  
Value CAV  
Standard  
Value C2  
Constant  
1/2T  
T
1/2T  
0.47ꢀF  
0.82ꢀF  
1.5ꢀF  
2.7ꢀF  
181ms  
325ms  
A
0V  
η
cycle has a crest factor of 10 (CF = 1  
).  
Symmetrical Sine Wave  
T
T
100ꢀs  
T
T
ꢅ = DUTY CYCLE =  
T
B
C
D
Vp  
0V  
ꢅ
e0  
CF = 1/  
0
Sine Wave with dc Offset  
e
IN  
(RMS) = 1 V RMS  
T
T
100ꢀF  
10(T – T2)  
10(T – 2T2)  
T2  
T2  
6.8ꢀF  
5.6ꢀF  
22ꢀF  
18ꢀF  
2.67sec  
2.17sec  
10  
0V  
Pulse Train Waveform  
C
AV  
= 22ꢀF  
T
T
T2  
T2  
0V  
1.0  
0.1  
CF = 10  
FREQUENCY RESPONSE  
The frequency response of the AD637 at various signal levels is  
shown in Figure 10. The dashed lines show the upper frequency  
limits for 1%, 10%, and 3 dB of additional error. For example,  
note that for 1% additional error with a 2 V rms input the high-  
est frequency allowable is 200 kHz. A 200 mV signal can be  
measured with 1% error at signal frequencies up to 100 kHz.  
CF = 3  
0.01  
1
10  
100  
1000  
To take full advantage of the wide bandwidth of the AD637,  
care must be taken in the selection of the input buffer amplifier.  
To ensure that the input signal is accurately presented to the  
converter, the input buffer must have a –3 dB bandwidth that is  
wider than that of the AD637. A point that should not be over-  
looked is the importance of slew rate in this application. For  
example, the minimum slew rate required for a 1 V rms 5 MHz  
sine-wave input signal is 44 V/µs. The user is cautioned that this  
is the minimum rising or falling slew rate and that care must be  
exercised in the selection of the buffer amplifier, as some ampli-  
fiers exhibit a two-to-one difference between rising and falling slew  
rates. The AD845 is recommended as a precision input buffer.  
PULSEWIDTH – ꢀs  
Figure 11. AD637 Error vs. Pulsewidth Rectangular Pulse  
REV. F  
–9–  
1...6789101112...16

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