Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

LMV7235 Datasheet(PDF) 10 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part No. LMV7235
Description  45ns, Ultra Low Power, Low Voltage, Rail-to-Rail Input Comparator with Open-Drain/Push-Pull Output
Download  12 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo 

LMV7235 Datasheet(HTML) 10 Page - National Semiconductor (TI)

 
Zoom Inzoom in Zoom Outzoom out
 10 / 12 page
background image
Application Section (Continued)
Zero-Crossing Detector
The inverting input is connected to ground and the non-
inverting input is connected to 100mVp-p signal. As the
signal at the non-inverting input crosses 0V, the compara-
tor’s output changes state.
Threshold Detector
Instead of tying the inverting input to 0V, the inverting input
can be tied to a reference voltage. The non-inverting input is
connected to the input. As the input passes the V
REF thresh-
old, the comparator’s output changes state.
Crystal Oscillator
A simple crystal oscillator using the LMV7239 is shown
below. Resistors R1 and R2 set the bias point at the com-
parator’s non-inverting input. Resistors R3, R4 and C1 sets
the inverting input node at an appropriate DC average level
based on the output. The crystal’s path provides resonant
positive feedback and stable oscillation occurs. The output
duty cycle for this circuit is roughly 50%, but it is affected by
resistor tolerances and to a lesser extent by the comparator
offset.
IR Receiver
The LMV7239 is an ideal candidate to be used as an infrared
receiver. The infrared photo diode creates a current relative
to the amount of infrared light present. The current creates a
voltage across R
D. When this voltage level cross the voltage
applied by the voltage divider to the inverting input, the
output transitions.
10135918
FIGURE 3. Zero-Crossing Detector
10135921
FIGURE 4. Threshold Detector
10135922
FIGURE 5. Crystal Oscillator
10135923
FIGURE 6. IR Receiver
www.national.com
10


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12 


Datasheet Download




Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
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