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LM231 PDF预览

LM231

更新时间: 2024-01-14 07:08:03
品牌 Logo 应用领域
美国国家半导体 - NSC 转换器
页数 文件大小 规格书
15页 371K
描述
Precision Voltage-to-Frequency Converters

LM231 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
包装说明:SOP, SOP14,.4Reach Compliance Code:unknown
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.82转换器类型:VOLTAGE TO FREQUENCY CONVERTER
JESD-30 代码:R-PDSO-G14JESD-609代码:e0
最大线性误差 (EL):0.02%功能数量:1
端子数量:14最大工作频率:0.1 MHz
最高工作温度:85 °C最低工作温度:-25 °C
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装等效代码:SOP14,.4封装形状:RECTANGULAR
封装形式:SMALL OUTLINE峰值回流温度(摄氏度):NOT SPECIFIED
电源:5 V认证状态:Not Qualified
子类别:Analog Special Function Converters最大压摆率:6 mA
最大供电电压:40 V最小供电电压:4 V
标称供电电压:5 V表面贴装:YES
技术:BIPOLAR温度等级:OTHER
端子面层:Tin/Lead (Sn/Pb)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:NOT SPECIFIEDBase Number Matches:1

LM231 数据手册

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June 1999  
LM231A/LM231/LM331A/LM331  
Precision Voltage-to-Frequency Converters  
over the full operating temperature range, at power supplies  
as low as 4.0V. The precision timer circuit has low bias cur-  
rents without degrading the quick response necessary for  
100 kHz voltage-to-frequency conversion. And the output  
are capable of driving 3 TTL loads, or a high voltage output  
General Description  
The LM231/LM331 family of voltage-to-frequency converters  
are ideally suited for use in simple low-cost circuits for  
analog-to-digital conversion, precision frequency-to-voltage  
conversion, long-term integration, linear frequency modula-  
tion or demodulation, and many other functions. The output  
when used as a voltage-to-frequency converter is a pulse  
train at a frequency precisely proportional to the applied in-  
put voltage. Thus, it provides all the inherent advantages of  
the voltage-to-frequency conversion techniques, and is easy  
to apply in all standard voltage-to-frequency converter appli-  
cations. Further, the LM231A/LM331A attain a new high  
level of accuracy versus temperature which could only be at-  
tained with expensive voltage-to-frequency modules. Addi-  
tionally the LM231/331 are ideally suited for use in digital  
systems at low power supply voltages and can provide  
up to 40V, yet is short-circuit-proof against VCC  
.
Features  
n Guaranteed linearity 0.01% max  
n Improved performance in existing voltage-to-frequency  
conversion applications  
n Split or single supply operation  
n Operates on single 5V supply  
n Pulse output compatible with all logic forms  
±
n Excellent temperature stability, 50 ppm/˚C max  
n Low power dissipation, 15 mW typical at 5V  
n Wide dynamic range, 100 dB min at 10 kHz full scale  
frequency  
n Wide range of full scale frequency, 1 Hz to 100 kHz  
n Low cost  
low-cost  
analog-to-digital  
conversion  
in  
microprocessor-controlled systems. And, the frequency from  
a battery powered voltage-to-frequency converter can be  
easily channeled through a simple photoisolator to provide  
isolation against high common mode levels.  
The LM231/LM331 utilize a new temperature-compensated  
band-gap reference circuit, to provide excellent accuracy  
Typical Applications  
DS005680-1  
*
Use stable components with low temperature coefficients. See Typical Applications section.  
**  
0.1µF or 1µF, See “Principles of Operation.”  
FIGURE 1. Simple Stand-Alone Voltage-to-Frequency Converter  
=
±
with 0.03% Typical Linearity (f 10 Hz to 11 kHz)  
Teflon® is a registered trademark of DuPont  
© 1999 National Semiconductor Corporation  
DS005680  
www.national.com  

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