Electronic Components Datasheet Search |
|
LMP7300MA Datasheet(PDF) 11 Page - Texas Instruments |
|
LMP7300MA Datasheet(HTML) 11 Page - Texas Instruments |
11 / 30 page V + GND V + 2.048V GND INP INN HYSTP HYSTN VREF OUT RP1 1.47 k: 1% RN2 1 M: 1% + - + - VIN RP2 1 M: 1% RN1 4.91 k: 1% RPULLUP 1 M: 1 IL REF REF 1 2 1 IH REF REF 1 2 R V V V R R R V V V R R æ ö = - ç ÷ + è ø æ ö = + ç ÷ + è ø LMP7300 www.ti.com SNOSAT7G – AUGUST 2007 – REVISED OCTOBER 2015 Feature Description (continued) 7.3.3 Hysteresis False triggering on noise coupled into the signal path is a common problem for comparator based threshold detectors. One of the most effective solutions is to add hysteresis. Hysteresis is a circuit signal path characteristic where an amplitude delay is introduced to the normal input. Positive hysteresis forces the signal to pass the normal switch point before the output makes a low to high transition while negative hysteresis does the opposite. This is a memory effect. The comparator behaves differently based on which direction the signal is going. The LM7300 has been designed with a unique way of introducing hysteresis. The set points are completely independent of each other, the power supply, and the input or output conditions. The HYSTP pin sets positive hysteresis and the HYSTN pin sets the negative hysteresis in a simple way using two resistors. The pins can be tied together for the same hysteresis or tied to separate voltage taps for asymmetric hysteresis, or tied to the reference for no hysteresis. When the precision reference is used to drive the voltage tap resistor divider precise, stable threshold levels can be obtained. The maximum recommended hysteresis is about 130 mV. This places the HYSTP and HYSTN pin voltages at VREF – 130 mV, which is approximately the center of their input common mode range at 2.7 V. For the typical example, a differential input signal voltage, VIN, is applied between INP and INN, the noninverting and inverting inputs of the comparator. A DC switch or threshold voltage, VTH, is set on the negative input to keep the output off when the signal is above and on when it goes below this level. For a precision threshold tie the INN pin to VREF. With the output, off the circuit is in the minimum power state. Figure 13 through Figure 21 demonstrate the different configurations for setting the upper threshold VIH and the lower threshold VIL and their relationship to the input trip point VREF, by the following formulas. (1) Figure 12. Typical Micropower Application to Set Asymmetric Positive and Negative Hysteresis of −10 mV, 3 mV Copyright © 2007–2015, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: LMP7300 |
Similar Part No. - LMP7300MA |
|
Similar Description - LMP7300MA |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |