Electronic Components Datasheet Search |
|
LMV393MMX Datasheet(PDF) 8 Page - Texas Instruments |
|
LMV393MMX Datasheet(HTML) 8 Page - Texas Instruments |
8 / 32 page LMV331-N, LMV339-N, LMV393-N SNOS018G – AUGUST 1999 – REVISED FEBRUARY 2013 www.ti.com APPLICATION CIRCUITS BASIC COMPARATOR A basic comparator circuit is used for converting analog signals to a digital output. The LMV331-N/393-N/339-N have an open-collector output stage, which requires a pull-up resistor to a positive supply voltage for the output to switch properly. When the internal output transistor is off, the output voltage will be pulled up to the external positive voltage. The output pull-up resistor should be chosen high enough so as to avoid excessive power dissipation yet low enough to supply enough drive to switch whatever load circuitry is used on the comparator output. On the LMV331-N/393-N/339-N the pull-up resistor should range between 1k to 10k Ω. The comparator compares the input voltage (VIN) at the non-inverting pin to the reference voltage (VREF) at the inverting pin. If VIN is less than VREF, the output voltage (VO) is at the saturation voltage. On the other hand, if VIN is greater than VREF, the output voltage (VO) is at VCC. Figure 12. Basic Comparator COMPARATOR WITH HYSTERESIS The basic comparator configuration may oscillate or produce a noisy output if the applied differential input voltage is near the comparator's offset voltage. This usually happens when the input signal is moving very slowly across the comparator's switching threshold. This problem can be prevented by the addition of hysteresis or positive feedback. INVERTING COMPARATOR WITH HYSTERESIS The inverting comparator with hysteresis requires a three resistor network that are referenced to the supply voltage VCC of the comparator. When Vin at the inverting input is less than Va, the voltage at the non-inverting node of the comparator (Vin < Va), the output voltage is high (for simplicity assume VO switches as high as VCC). The three network resistors can be represented as R1//R3 in series with R2. The lower input trip voltage Va1 is defined as (1) When Vin is greater than Va (Vin > Va), the output voltage is low very close to ground. In this case the three network resistors can be presented as R2//R3 in series with R1. The upper trip voltage Va2 is defined as (2) 8 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LMV331-N LMV339-N LMV393-N |
Similar Part No. - LMV393MMX |
|
Similar Description - LMV393MMX |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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 |