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LM2907M-8X PDF预览

LM2907M-8X

更新时间： 2024-11-05 13:09:23
品牌 Logo 应用领域
美国国家半导体 - NSC 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
21页 708K
描述
IC VOLTAGE-FREQUENCY CONVERTER, PDSO8, 0.150 INCH, PLASTIC, SO-8, Analog Special Function Converter

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LM2907M-8X 技术参数

生命周期：Obsolete零件包装代码：SOIC
包装说明：SOP,针数：8
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.16
转换器类型：VOLTAGE TO FREQUENCY CONVERTERJESD-30 代码：R-PDSO-G8
长度：4.9 mm最大线性误差 (EL)：1%
功能数量：1端子数量：8
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
最大正输入电压：10.5 V认证状态：Not Qualified
座面最大高度：1.75 mm标称供电电压：12 V
表面贴装：YES技术：BIPOLAR
温度等级：INDUSTRIAL端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
宽度：3.9 mmBase Number Matches：1

LM2907M-8X 数据手册

 浏览型号LM2907M-8X的Datasheet PDF文件第2页浏览型号LM2907M-8X的Datasheet PDF文件第3页浏览型号LM2907M-8X的Datasheet PDF文件第4页浏览型号LM2907M-8X的Datasheet PDF文件第5页浏览型号LM2907M-8X的Datasheet PDF文件第6页浏览型号LM2907M-8X的Datasheet PDF文件第7页 
May 2003  
LM2907/LM2917  
Frequency to Voltage Converter  
n Only one RC network provides frequency doubling  
n Zener regulator on chip allows accurate and stable  
frequency to voltage or current conversion (LM2917)  
General Description  
The LM2907, LM2917 series are monolithic frequency to  
voltage converters with a high gain op amp/comparator de-  
signed to operate a relay, lamp, or other load when the input  
frequency reaches or exceeds a selected rate. The tachom-  
eter uses a charge pump technique and offers frequency  
doubling for low ripple, full input protection in two versions  
(LM2907-8, LM2917-8) and its output swings to ground for a  
zero frequency input.  
Features  
n Ground referenced tachometer input interfaces directly  
with variable reluctance magnetic pickups  
n Op amp/comparator has floating transistor output  
n 50 mA sink or source to operate relays, solenoids,  
meters, or LEDs  
The op amp/comparator is fully compatible with the tachom-  
eter and has a floating transistor as its output. This feature  
allows either a ground or supply referred load of up to 50 mA.  
The collector may be taken above VCC up to a maximum VCE  
of 28V.  
n Frequency doubling for low ripple  
n Tachometer has built-in hysteresis with either differential  
input or ground referenced input  
n Built-in zener on LM2917  
The two basic configurations offered include an 8-pin device  
with a ground referenced tachometer input and an internal  
connection between the tachometer output and the op amp  
non-inverting input. This version is well suited for single  
speed or frequency switching or fully buffered frequency to  
voltage conversion applications.  
n
0.3% linearity typical  
n Ground referenced tachometer is fully protected from  
damage due to swings above VCC and below ground  
Applications  
n Over/under speed sensing  
n Frequency to voltage conversion (tachometer)  
n Speedometers  
The more versatile configurations provide differential ta-  
chometer input and uncommitted op amp inputs. With this  
version the tachometer input may be floated and the op amp  
becomes suitable for active filter conditioning of the tachom-  
eter output.  
n Breaker point dwell meters  
n Hand-held tachometer  
n Speed governors  
n Cruise control  
n Automotive door lock control  
n Clutch control  
Both of these configurations are available with an active  
shunt regulator connected across the power leads. The  
regulator clamps the supply such that stable frequency to  
voltage and frequency to current operations are possible  
with any supply voltage and a suitable resistor.  
n Horn control  
n Touch or sound switches  
Advantages  
n Output swings to ground for zero frequency input  
n Easy to use; VOUT = fIN x VCC x R1 x C1  
Block and Connection Diagrams  
Dual-In-Line and Small Outline Packages, Top Views  
00794201  
Order Number LM2907M-8 or LM2907N-8  
See NS Package Number M08A or N08E  
00794202  
Order Number LM2917M-8 or LM2917N-8  
See NS Package Number M08A or N08E  
© 2003 National Semiconductor Corporation  
DS007942  
www.national.com  
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