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LM2907MX-8EP 数据表(PDF) 1 Page - National Semiconductor (TI) |
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LM2907MX-8EP 数据表(HTML) 1 Page - National Semiconductor (TI) |
1 / 21 page LM2907EP/LM2917EP Enhanced Plastic Frequency to Voltage Converter General Description 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. 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 V CC up to a maximum VCE of 28V. 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. 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. 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 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 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 LM2917EP n ± 0.3% linearity typical n Ground referenced tachometer is fully protected from damage due to swings above V CC and below ground Advantages n Output swings to ground for zero frequency input n Easy to use; V OUT =fIN xVCC xR1xC1 n Only one RC network provides frequency doubling n Zener regulator on chip allows accurate and stable frequency to voltage or current conversion (LM2917EP) Applications n Selected Military Applications n Selected Avionics Applications Ordering Information PART NUMBER VIN PART NUMBER NS PACKAGE NUMBER (Note 3) LM2907MX-8EP V62/04635-01 M08A LM2917MXEP V62/04635-02 M14A (Notes 1, 2) TBD 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 June 2004 © 2004 National Semiconductor Corporation DS200906 www.national.com |
类似零件编号 - LM2907MX-8EP |
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类似说明 - LM2907MX-8EP |
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