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LM2917EP PDF预览

LM2917EP

更新时间: 2024-02-22 15:29:58
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
21页 712K
描述
Enhanced Plastic Frequency to Voltage Converter

LM2917EP 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
包装说明:DIP, DIP14,.3Reach Compliance Code:not_compliant
风险等级:5.92转换器类型:D/A CONVERTER
JESD-30 代码:R-PDIP-T14端子数量:14
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:DIP
封装等效代码:DIP14,.3封装形状:RECTANGULAR
封装形式:IN-LINE电源:12 V
认证状态:Not Qualified子类别:Analog Special Function Converters
标称供电电压:12 V表面贴装:NO
技术:BIPOLAR温度等级:INDUSTRIAL
端子形式:THROUGH-HOLE端子节距:2.54 mm
端子位置:DUALBase Number Matches:1

LM2917EP 数据手册

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June 2004  
LM2907EP/LM2917EP  
Enhanced Plastic Frequency to Voltage Converter  
General Description  
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 LM2907EP, LP2917EP series are monolithic frequency  
to voltage converters with a high gain op amp/comparator  
designed to operate a relay, lamp, or other load when the  
input frequency reaches or exceeds a selected rate. The  
tachometer uses a charge pump technique and offers fre-  
quency doubling for low ripple, full input protection in two  
versions (LM2907-8EP, LM2917-8EP) and its output swings  
to ground for a zero frequency input.  
n Frequency doubling for low ripple  
n Tachometer has built-in hysteresis with either differential  
input or ground referenced input  
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 Built-in zener on LM2917EP  
n
0.3% linearity typical  
n Ground referenced tachometer is fully protected from  
damage due to swings above VCC and below ground  
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.  
Advantages  
n Output swings to ground for zero frequency input  
n Easy to use; VOUT = fIN x VCC x R1 x C1  
n Only one RC network provides frequency doubling  
n Zener regulator on chip allows accurate and stable  
frequency to voltage or current conversion (LM2917EP)  
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.  
Applications  
n Selected Military Applications  
n Selected Avionics Applications  
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.  
ENHANCED PLASTIC  
Extended Temperature Performance of −40˚C to +85˚C  
Baseline Control - Single Fab & Assembly Site  
Process Change Notification (PCN)  
Qualification & Reliability Data  
Solder (PbSn) Lead Finish is standard  
Enhanced Diminishing Manufacturing Sources (DMS)  
Support  
Ordering Information  
PART NUMBER  
LM2907MX-8EP  
LM2917MXEP  
(Notes 1, 2)  
VIN PART NUMBER  
V62/04635-01  
V62/04635-02  
TBD  
NS PACKAGE NUMBER (Note 3)  
M08A  
M14A  
TBD  
Note 1: For the following (Enhanced Plastic) versions, check for availablility: LM2907M-8EP, LM2907MEP, LM2907MXEP, LM2907N-8EP, LM2907NEP  
and LM2917M-8EP, LM2917MX-8EP, LM2917MEP, LM2917N-8EP, LM2917NEP. Parts listed with an "X" are provided in Tape & Reel and parts without  
an "X" are in Rails.  
Note 2: FOR ADDITIONAL ORDERING AND PRODUCT INFORMATION, PLEASE VISIT THE ENHANCED PLASTIC WEB SITE AT: www.national.com/  
mil  
Note 3: Refer to package details under Physical Dimensions  
© 2004 National Semiconductor Corporation  
DS200906  
www.national.com  

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